./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:29:31,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:29:31,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:29:31,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:29:31,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:29:31,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:29:31,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:29:31,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:29:31,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:29:31,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:29:31,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:29:31,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:29:31,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:29:31,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:29:31,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:29:31,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:29:31,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:29:31,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:29:31,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:29:31,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:29:31,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:29:31,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:29:31,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:29:31,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:29:31,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:29:31,333 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:29:31,333 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:29:31,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:29:31,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:29:31,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:29:31,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:29:31,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:29:31,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:29:31,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:29:31,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:29:31,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:29:31,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:29:31,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:29:31,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:29:31,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:29:31,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:29:31,347 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 01:29:31,375 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:29:31,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:29:31,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:29:31,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:29:31,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:29:31,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:29:31,377 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:29:31,378 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:29:31,378 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:29:31,378 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:29:31,379 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:29:31,379 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:29:31,379 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:29:31,380 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:29:31,380 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:29:31,380 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:29:31,380 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:29:31,380 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:29:31,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:29:31,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:29:31,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:29:31,382 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:29:31,382 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:29:31,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:29:31,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:29:31,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:29:31,383 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:29:31,383 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:29:31,383 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:29:31,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:29:31,384 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:29:31,384 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:29:31,384 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:29:31,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:29:31,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:29:31,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:29:31,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:29:31,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:29:31,385 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:29:31,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:29:31,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:29:31,386 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:29:31,387 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_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 [2021-11-21 01:29:31,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:29:31,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:29:31,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:29:31,762 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:29:31,762 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:29:31,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2021-11-21 01:29:31,829 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/data/a061d249f/1d51fd9ff5e14b42a8ef9c9dee390db2/FLAGbf86d24fa [2021-11-21 01:29:32,320 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:29:32,321 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2021-11-21 01:29:32,345 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/data/a061d249f/1d51fd9ff5e14b42a8ef9c9dee390db2/FLAGbf86d24fa [2021-11-21 01:29:32,648 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/data/a061d249f/1d51fd9ff5e14b42a8ef9c9dee390db2 [2021-11-21 01:29:32,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:29:32,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:29:32,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:29:32,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:29:32,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:29:32,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:29:32" (1/1) ... [2021-11-21 01:29:32,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c73665d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:32, skipping insertion in model container [2021-11-21 01:29:32,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:29:32" (1/1) ... [2021-11-21 01:29:32,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:29:32,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:29:33,052 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_7051ad62-ee07-4d33-a476-987ba4fa8204/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2021-11-21 01:29:33,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:29:33,062 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:29:33,101 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_7051ad62-ee07-4d33-a476-987ba4fa8204/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2021-11-21 01:29:33,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:29:33,133 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:29:33,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:33 WrapperNode [2021-11-21 01:29:33,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:29:33,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:29:33,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:29:33,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:29:33,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:33" (1/1) ... [2021-11-21 01:29:33,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:33" (1/1) ... [2021-11-21 01:29:33,178 INFO L137 Inliner]: procedures = 126, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 108 [2021-11-21 01:29:33,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:29:33,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:29:33,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:29:33,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:29:33,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:33" (1/1) ... [2021-11-21 01:29:33,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:33" (1/1) ... [2021-11-21 01:29:33,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:33" (1/1) ... [2021-11-21 01:29:33,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:33" (1/1) ... [2021-11-21 01:29:33,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:33" (1/1) ... [2021-11-21 01:29:33,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:33" (1/1) ... [2021-11-21 01:29:33,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:33" (1/1) ... [2021-11-21 01:29:33,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:29:33,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:29:33,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:29:33,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:29:33,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:33" (1/1) ... [2021-11-21 01:29:33,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:29:33,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:33,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:29:33,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:29:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:29:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:29:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:29:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:29:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:29:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:29:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:29:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:29:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:29:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:29:33,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:29:33,457 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:29:33,458 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:29:33,787 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:29:33,827 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:29:33,827 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:29:33,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:29:33 BoogieIcfgContainer [2021-11-21 01:29:33,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:29:33,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:29:33,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:29:33,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:29:33,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:29:32" (1/3) ... [2021-11-21 01:29:33,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557c966c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:29:33, skipping insertion in model container [2021-11-21 01:29:33,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:33" (2/3) ... [2021-11-21 01:29:33,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557c966c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:29:33, skipping insertion in model container [2021-11-21 01:29:33,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:29:33" (3/3) ... [2021-11-21 01:29:33,849 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2021-11-21 01:29:33,854 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:29:33,854 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2021-11-21 01:29:33,898 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:29:33,906 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-21 01:29:33,906 INFO L340 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2021-11-21 01:29:33,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 61 states have internal predecessors, (68), 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) [2021-11-21 01:29:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:29:33,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:33,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:29:33,927 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:29:33,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:33,933 INFO L85 PathProgramCache]: Analyzing trace with hash 4990986, now seen corresponding path program 1 times [2021-11-21 01:29:33,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:33,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528638039] [2021-11-21 01:29:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:33,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:29:34,106 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:34,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528638039] [2021-11-21 01:29:34,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528638039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:34,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:29:34,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:29:34,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440799773] [2021-11-21 01:29:34,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:34,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:34,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:34,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:29:34,146 INFO L87 Difference]: Start difference. First operand has 62 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 61 states have internal predecessors, (68), 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 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-21 01:29:34,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:34,228 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-11-21 01:29:34,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:34,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-21 01:29:34,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:34,242 INFO L225 Difference]: With dead ends: 74 [2021-11-21 01:29:34,242 INFO L226 Difference]: Without dead ends: 71 [2021-11-21 01:29:34,247 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 [2021-11-21 01:29:34,251 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:34,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 112 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:29:34,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-21 01:29:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2021-11-21 01:29:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 29 states have (on average 2.206896551724138) internal successors, (64), 60 states have internal predecessors, (64), 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) [2021-11-21 01:29:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-11-21 01:29:34,300 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 4 [2021-11-21 01:29:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:34,301 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-11-21 01:29:34,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-21 01:29:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-11-21 01:29:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:29:34,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:34,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:29:34,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:29:34,303 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:29:34,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:34,306 INFO L85 PathProgramCache]: Analyzing trace with hash 4866058, now seen corresponding path program 1 times [2021-11-21 01:29:34,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:34,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824106560] [2021-11-21 01:29:34,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:34,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:29:34,352 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:34,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824106560] [2021-11-21 01:29:34,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824106560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:34,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:29:34,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:29:34,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878982734] [2021-11-21 01:29:34,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:34,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:34,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:34,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:34,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:29:34,355 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-21 01:29:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:34,466 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2021-11-21 01:29:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:34,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-11-21 01:29:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:34,468 INFO L225 Difference]: With dead ends: 101 [2021-11-21 01:29:34,468 INFO L226 Difference]: Without dead ends: 101 [2021-11-21 01:29:34,468 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 [2021-11-21 01:29:34,470 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 50 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:34,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 53 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:29:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-21 01:29:34,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 59. [2021-11-21 01:29:34,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 58 states have internal predecessors, (62), 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) [2021-11-21 01:29:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-11-21 01:29:34,478 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 4 [2021-11-21 01:29:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:34,479 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-11-21 01:29:34,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-21 01:29:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-11-21 01:29:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:29:34,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:34,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:29:34,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:29:34,482 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:29:34,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:34,483 INFO L85 PathProgramCache]: Analyzing trace with hash 4866059, now seen corresponding path program 1 times [2021-11-21 01:29:34,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:34,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79696589] [2021-11-21 01:29:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:34,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:29:34,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:34,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79696589] [2021-11-21 01:29:34,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79696589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:34,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:29:34,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:29:34,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90166581] [2021-11-21 01:29:34,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:34,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:34,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:34,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:34,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:29:34,574 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-21 01:29:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:34,653 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-11-21 01:29:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:34,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-11-21 01:29:34,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:34,655 INFO L225 Difference]: With dead ends: 57 [2021-11-21 01:29:34,660 INFO L226 Difference]: Without dead ends: 57 [2021-11-21 01:29:34,661 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 [2021-11-21 01:29:34,662 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:34,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:29:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-21 01:29:34,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-21 01:29:34,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 56 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) [2021-11-21 01:29:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-11-21 01:29:34,669 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 4 [2021-11-21 01:29:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:34,670 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-11-21 01:29:34,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-21 01:29:34,670 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-11-21 01:29:34,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:29:34,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:34,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:29:34,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:29:34,671 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:29:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:34,672 INFO L85 PathProgramCache]: Analyzing trace with hash 381317508, now seen corresponding path program 1 times [2021-11-21 01:29:34,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:34,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726303387] [2021-11-21 01:29:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:34,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:29:34,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:34,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726303387] [2021-11-21 01:29:34,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726303387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:34,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:29:34,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:29:34,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266401850] [2021-11-21 01:29:34,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:34,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:29:34,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:34,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:29:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:29:34,747 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-21 01:29:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:34,865 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2021-11-21 01:29:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:29:34,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:29:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:34,875 INFO L225 Difference]: With dead ends: 101 [2021-11-21 01:29:34,875 INFO L226 Difference]: Without dead ends: 101 [2021-11-21 01:29:34,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:29:34,882 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 94 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:34,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 76 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:29:34,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-21 01:29:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 56. [2021-11-21 01:29:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 55 states have internal predecessors, (59), 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) [2021-11-21 01:29:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-11-21 01:29:34,891 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 6 [2021-11-21 01:29:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:34,892 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-11-21 01:29:34,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-21 01:29:34,899 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-11-21 01:29:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:29:34,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:34,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:29:34,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:29:34,900 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:29:34,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:34,901 INFO L85 PathProgramCache]: Analyzing trace with hash 381317509, now seen corresponding path program 1 times [2021-11-21 01:29:34,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:34,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621184380] [2021-11-21 01:29:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:34,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:29:34,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:34,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621184380] [2021-11-21 01:29:34,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621184380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:34,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:29:34,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:29:35,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024704727] [2021-11-21 01:29:35,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:35,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:29:35,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:35,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:29:35,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:29:35,002 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-21 01:29:35,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:35,079 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-11-21 01:29:35,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:29:35,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:29:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:35,085 INFO L225 Difference]: With dead ends: 58 [2021-11-21 01:29:35,085 INFO L226 Difference]: Without dead ends: 58 [2021-11-21 01:29:35,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:29:35,092 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 107 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:35,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 31 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:29:35,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-21 01:29:35,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-11-21 01:29:35,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 2.0) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-11-21 01:29:35,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-11-21 01:29:35,107 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 6 [2021-11-21 01:29:35,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:35,107 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-11-21 01:29:35,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-21 01:29:35,108 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-11-21 01:29:35,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:29:35,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:35,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:29:35,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:29:35,109 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:29:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:35,110 INFO L85 PathProgramCache]: Analyzing trace with hash -355324193, now seen corresponding path program 1 times [2021-11-21 01:29:35,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:35,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179001625] [2021-11-21 01:29:35,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:35,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:29:35,218 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:35,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179001625] [2021-11-21 01:29:35,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179001625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:29:35,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456132958] [2021-11-21 01:29:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:35,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:35,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:35,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:29:35,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:29:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:35,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:29:35,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:29:35,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:29:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:29:35,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456132958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:29:35,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [441353808] [2021-11-21 01:29:35,441 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:29:35,441 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:29:35,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:29:35,454 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:29:35,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:29:35,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:35,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:35,622 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 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 01:29:35,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:35,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:35,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:35,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:35,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:35,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 01:29:36,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-11-21 01:29:36,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-11-21 01:29:36,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,191 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:29:36,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:29:36,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,431 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 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:29:36,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:29:36,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,568 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 01:29:36,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:36,594 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 23 treesize of output 13 [2021-11-21 01:29:36,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:36,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2021-11-21 01:29:36,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:36,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-21 01:29:37,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:37,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:37,522 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:29:37,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 357 treesize of output 339 [2021-11-21 01:29:37,579 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:29:37,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 345 [2021-11-21 01:29:37,628 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:29:37,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 352 [2021-11-21 01:29:39,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:39,060 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:29:39,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 299 treesize of output 300 [2021-11-21 01:29:39,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:39,113 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:29:39,113 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 4 case distinctions, treesize of input 297 treesize of output 298 [2021-11-21 01:29:39,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:39,164 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:29:39,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 301 [2021-11-21 01:29:40,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:40,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:40,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:40,618 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 01:29:40,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 308 treesize of output 293 [2021-11-21 01:29:40,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:40,656 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:29:40,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 289 treesize of output 282 [2021-11-21 01:29:40,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:40,688 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 01:29:40,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 320 [2021-11-21 01:29:41,300 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-21 01:29:41,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 316 treesize of output 320 [2021-11-21 01:29:42,198 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:29:42,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 357 treesize of output 364 [2021-11-21 01:29:42,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:42,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:42,224 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:29:42,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 364 treesize of output 346 [2021-11-21 01:29:42,264 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:29:42,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 352 [2021-11-21 01:29:43,318 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 01:29:43,319 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 5 case distinctions, treesize of input 299 treesize of output 300 [2021-11-21 01:29:43,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:43,380 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:29:43,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 302 treesize of output 303 [2021-11-21 01:29:43,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:43,437 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:29:43,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 301 [2021-11-21 01:29:44,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:44,489 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:29:44,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 301 [2021-11-21 01:29:44,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:44,525 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:29:44,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 298 treesize of output 291 [2021-11-21 01:29:44,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:44,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:44,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:44,553 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-21 01:29:44,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 336 treesize of output 321 [2021-11-21 01:29:45,108 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 [2021-11-21 01:29:45,121 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 [2021-11-21 01:29:45,170 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:29:46,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [441353808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:46,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:29:46,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2021-11-21 01:29:46,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998411162] [2021-11-21 01:29:46,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:46,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:29:46,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:46,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:29:46,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:29:46,582 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:29:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:46,889 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2021-11-21 01:29:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:29:46,891 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 01:29:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:46,892 INFO L225 Difference]: With dead ends: 88 [2021-11-21 01:29:46,892 INFO L226 Difference]: Without dead ends: 88 [2021-11-21 01:29:46,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:29:46,893 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 84 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:46,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 93 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:29:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-21 01:29:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2021-11-21 01:29:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 55 states have internal predecessors, (59), 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) [2021-11-21 01:29:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-11-21 01:29:46,899 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 9 [2021-11-21 01:29:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:46,899 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-11-21 01:29:46,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:29:46,899 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-11-21 01:29:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:29:46,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:46,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:29:46,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:29:47,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:47,113 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:29:47,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:47,113 INFO L85 PathProgramCache]: Analyzing trace with hash -355327076, now seen corresponding path program 1 times [2021-11-21 01:29:47,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:47,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90468448] [2021-11-21 01:29:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:47,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:29:47,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:47,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90468448] [2021-11-21 01:29:47,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90468448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:29:47,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281284976] [2021-11-21 01:29:47,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:47,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:47,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:47,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:29:47,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:29:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:47,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:29:47,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:29:47,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:29:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:29:47,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281284976] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:29:47,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [60681294] [2021-11-21 01:29:47,284 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:29:47,285 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:29:47,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:29:47,285 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:29:47,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:29:47,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:47,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:47,381 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 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 01:29:47,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:47,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:47,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:47,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:47,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:47,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 01:29:47,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-11-21 01:29:47,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:47,794 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:29:47,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-21 01:29:47,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:47,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:29:47,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:47,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:47,936 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 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:29:47,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:47,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:29:48,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:48,176 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 23 treesize of output 13 [2021-11-21 01:29:48,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:48,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:48,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:48,227 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 01:29:48,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:48,261 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 23 treesize of output 13 [2021-11-21 01:29:48,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:48,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:48,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:48,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:48,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:48,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:48,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:48,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:48,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:48,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-21 01:29:48,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:48,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:48,939 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:29:48,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 357 treesize of output 339 [2021-11-21 01:29:48,976 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:29:48,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 345 [2021-11-21 01:29:49,038 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:29:49,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 352 [2021-11-21 01:29:50,260 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 01:29:50,260 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 5 case distinctions, treesize of input 299 treesize of output 300 [2021-11-21 01:29:50,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:50,300 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:29:50,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 302 treesize of output 303 [2021-11-21 01:29:50,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:50,357 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:29:50,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 301 [2021-11-21 01:29:51,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:51,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:51,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:51,338 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 01:29:51,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 308 treesize of output 293 [2021-11-21 01:29:51,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:51,364 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:29:51,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 289 treesize of output 282 [2021-11-21 01:29:51,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:51,409 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:29:51,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 279 treesize of output 272 [2021-11-21 01:29:51,795 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-21 01:29:51,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 321 treesize of output 325 [2021-11-21 01:29:52,624 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:29:52,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 357 treesize of output 364 [2021-11-21 01:29:52,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:52,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:52,646 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:29:52,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 364 treesize of output 346 [2021-11-21 01:29:52,690 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:29:52,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 352 [2021-11-21 01:29:53,496 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 01:29:53,496 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 5 case distinctions, treesize of input 299 treesize of output 300 [2021-11-21 01:29:53,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:53,545 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:29:53,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 302 treesize of output 303 [2021-11-21 01:29:53,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:53,586 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:29:53,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 301 [2021-11-21 01:29:54,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:54,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:54,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:54,886 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 01:29:54,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 308 treesize of output 293 [2021-11-21 01:29:54,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:54,914 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:29:54,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 289 treesize of output 282 [2021-11-21 01:29:54,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:54,942 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 01:29:54,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 320 [2021-11-21 01:29:55,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-21 01:29:55,593 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 [2021-11-21 01:29:55,648 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:29:57,489 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:29:57,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:29:57,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2021-11-21 01:29:57,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762840115] [2021-11-21 01:29:57,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:29:57,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:29:57,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:57,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:29:57,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:29:57,490 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-11-21 01:29:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:57,517 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2021-11-21 01:29:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:29:57,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 01:29:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:57,518 INFO L225 Difference]: With dead ends: 61 [2021-11-21 01:29:57,518 INFO L226 Difference]: Without dead ends: 61 [2021-11-21 01:29:57,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:29:57,519 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:57,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:29:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-21 01:29:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-21 01:29:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 60 states have internal predecessors, (64), 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) [2021-11-21 01:29:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-11-21 01:29:57,525 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 9 [2021-11-21 01:29:57,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:57,525 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-11-21 01:29:57,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-11-21 01:29:57,526 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-11-21 01:29:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:29:57,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:57,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 01:29:57,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:29:57,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:57,753 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:29:57,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:57,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1285036519, now seen corresponding path program 2 times [2021-11-21 01:29:57,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:57,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774307727] [2021-11-21 01:29:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:57,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:29:57,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:57,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774307727] [2021-11-21 01:29:57,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774307727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:29:57,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751999344] [2021-11-21 01:29:57,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:29:57,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:57,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:57,884 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:29:57,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:29:57,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:29:57,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:29:57,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:29:57,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:57,970 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 [2021-11-21 01:29:57,991 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:29:57,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-21 01:29:58,086 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:29:58,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 19 [2021-11-21 01:29:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:29:58,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:30:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:30:26,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751999344] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:30:26,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:30:26,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 14 [2021-11-21 01:30:26,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312764860] [2021-11-21 01:30:26,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:26,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:30:26,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:26,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:30:26,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=148, Unknown=13, NotChecked=0, Total=240 [2021-11-21 01:30:26,315 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2021-11-21 01:30:26,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:26,432 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2021-11-21 01:30:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:30:26,432 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 01:30:26,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:26,433 INFO L225 Difference]: With dead ends: 99 [2021-11-21 01:30:26,433 INFO L226 Difference]: Without dead ends: 99 [2021-11-21 01:30:26,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=89, Invalid=170, Unknown=13, NotChecked=0, Total=272 [2021-11-21 01:30:26,434 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 114 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:26,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 90 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2021-11-21 01:30:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-21 01:30:26,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 60. [2021-11-21 01:30:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 59 states have internal predecessors, (64), 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) [2021-11-21 01:30:26,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-11-21 01:30:26,439 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 14 [2021-11-21 01:30:26,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:26,439 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-11-21 01:30:26,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2021-11-21 01:30:26,440 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-11-21 01:30:26,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:30:26,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:26,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 01:30:26,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:30:26,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:26,645 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:30:26,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:26,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1285036520, now seen corresponding path program 1 times [2021-11-21 01:30:26,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:26,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925354272] [2021-11-21 01:30:26,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:26,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:30:26,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:26,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925354272] [2021-11-21 01:30:26,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925354272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:30:26,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810804535] [2021-11-21 01:30:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:26,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:26,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:30:26,801 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:30:26,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:30:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:26,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:30:26,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:30:26,876 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 [2021-11-21 01:30:26,924 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:30:26,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 17 [2021-11-21 01:30:27,073 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-21 01:30:27,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 32 [2021-11-21 01:30:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:30:27,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:30:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:30:31,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810804535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:30:31,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [213339254] [2021-11-21 01:30:31,555 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:30:31,556 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:30:31,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:30:31,556 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:30:31,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:30:31,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:31,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:31,614 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 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 01:30:31,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:31,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:31,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:31,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:31,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:31,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 01:30:31,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:31,919 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:30:31,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-11-21 01:30:31,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-11-21 01:30:32,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:30:32,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:30:32,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,149 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 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:30:32,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,280 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 01:30:32,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:32,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2021-11-21 01:30:32,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:32,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2021-11-21 01:30:32,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-21 01:30:32,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:32,858 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:30:32,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 357 treesize of output 339 [2021-11-21 01:30:32,896 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:30:32,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 345 [2021-11-21 01:30:32,931 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:30:32,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 352 [2021-11-21 01:30:33,996 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 01:30:33,997 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 5 case distinctions, treesize of input 299 treesize of output 300 [2021-11-21 01:30:34,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:34,067 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:30:34,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 302 treesize of output 303 [2021-11-21 01:30:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:34,134 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:30:34,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 301 [2021-11-21 01:30:35,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:35,248 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:30:35,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 301 [2021-11-21 01:30:35,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:35,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:35,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:35,282 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-21 01:30:35,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 346 treesize of output 331 [2021-11-21 01:30:35,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:35,318 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 01:30:35,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 320 [2021-11-21 01:30:35,827 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-21 01:30:35,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 316 treesize of output 320 [2021-11-21 01:30:36,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:36,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:36,649 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:30:36,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 357 treesize of output 339 [2021-11-21 01:30:36,703 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:30:36,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 345 [2021-11-21 01:30:36,750 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:30:36,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 352 [2021-11-21 01:30:38,187 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 01:30:38,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 396 treesize of output 389 [2021-11-21 01:30:38,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:38,243 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:30:38,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 399 treesize of output 400 [2021-11-21 01:30:38,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:38,301 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:30:38,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 397 treesize of output 398 [2021-11-21 01:30:39,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:39,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:39,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:39,718 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 01:30:39,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 308 treesize of output 293 [2021-11-21 01:30:39,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:39,757 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:30:39,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 289 treesize of output 282 [2021-11-21 01:30:39,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:39,791 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 01:30:39,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 320 [2021-11-21 01:30:40,712 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 [2021-11-21 01:30:40,753 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 [2021-11-21 01:30:40,812 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:30:42,890 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:30:42,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:30:42,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 3] total 12 [2021-11-21 01:30:42,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981320396] [2021-11-21 01:30:42,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:30:42,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:30:42,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:42,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:30:42,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=351, Unknown=1, NotChecked=0, Total=462 [2021-11-21 01:30:42,892 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 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) [2021-11-21 01:30:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:43,010 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-11-21 01:30:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:30:43,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 01:30:43,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:43,011 INFO L225 Difference]: With dead ends: 59 [2021-11-21 01:30:43,011 INFO L226 Difference]: Without dead ends: 59 [2021-11-21 01:30:43,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=138, Invalid=413, Unknown=1, NotChecked=0, Total=552 [2021-11-21 01:30:43,015 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:43,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 101 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2021-11-21 01:30:43,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-21 01:30:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-21 01:30:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 58 states have internal predecessors, (62), 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) [2021-11-21 01:30:43,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-11-21 01:30:43,037 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 14 [2021-11-21 01:30:43,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:43,037 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-11-21 01:30:43,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 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) [2021-11-21 01:30:43,037 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-11-21 01:30:43,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:30:43,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:43,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 01:30:43,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:30:43,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:43,253 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:30:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:43,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1181426445, now seen corresponding path program 1 times [2021-11-21 01:30:43,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:43,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842998680] [2021-11-21 01:30:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:43,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:30:43,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:43,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842998680] [2021-11-21 01:30:43,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842998680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:43,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:30:43,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:30:43,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104340790] [2021-11-21 01:30:43,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:43,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:30:43,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:43,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:30:43,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:30:43,331 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:43,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:43,489 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2021-11-21 01:30:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:30:43,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-21 01:30:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:43,490 INFO L225 Difference]: With dead ends: 88 [2021-11-21 01:30:43,490 INFO L226 Difference]: Without dead ends: 88 [2021-11-21 01:30:43,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:30:43,491 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 85 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:43,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 118 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:30:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-21 01:30:43,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2021-11-21 01:30:43,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 59 states have internal predecessors, (64), 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) [2021-11-21 01:30:43,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-11-21 01:30:43,494 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 15 [2021-11-21 01:30:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:43,495 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-11-21 01:30:43,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-11-21 01:30:43,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:30:43,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:43,496 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 01:30:43,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:30:43,496 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:30:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:43,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1181426446, now seen corresponding path program 1 times [2021-11-21 01:30:43,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:43,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768322137] [2021-11-21 01:30:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:43,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:30:43,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:43,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768322137] [2021-11-21 01:30:43,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768322137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:43,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:30:43,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:30:43,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947973015] [2021-11-21 01:30:43,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:43,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:30:43,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:43,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:30:43,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:30:43,590 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 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) [2021-11-21 01:30:43,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:43,784 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-11-21 01:30:43,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:30:43,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 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 [2021-11-21 01:30:43,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:43,785 INFO L225 Difference]: With dead ends: 83 [2021-11-21 01:30:43,786 INFO L226 Difference]: Without dead ends: 83 [2021-11-21 01:30:43,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:30:43,787 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 281 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:43,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 100 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:30:43,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-21 01:30:43,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2021-11-21 01:30:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 59 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-11-21 01:30:43,790 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 15 [2021-11-21 01:30:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:43,791 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-11-21 01:30:43,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 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) [2021-11-21 01:30:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-11-21 01:30:43,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:30:43,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:43,792 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:30:43,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:30:43,793 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:30:43,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:43,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1479448751, now seen corresponding path program 1 times [2021-11-21 01:30:43,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:43,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633807942] [2021-11-21 01:30:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:43,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:30:43,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:43,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633807942] [2021-11-21 01:30:43,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633807942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:43,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:30:43,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:30:43,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574860014] [2021-11-21 01:30:43,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:43,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:30:43,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:43,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:30:43,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:30:43,843 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:43,895 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-11-21 01:30:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:30:43,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-21 01:30:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:43,896 INFO L225 Difference]: With dead ends: 58 [2021-11-21 01:30:43,896 INFO L226 Difference]: Without dead ends: 58 [2021-11-21 01:30:43,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:30:43,898 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 126 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:43,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 33 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:30:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-21 01:30:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-21 01:30:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 57 states have internal predecessors, (61), 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) [2021-11-21 01:30:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-11-21 01:30:43,901 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 17 [2021-11-21 01:30:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:43,901 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-11-21 01:30:43,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-11-21 01:30:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:30:43,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:43,903 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:30:43,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:30:43,903 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:30:43,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1381727097, now seen corresponding path program 1 times [2021-11-21 01:30:43,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:43,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581358159] [2021-11-21 01:30:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:43,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:30:44,003 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:44,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581358159] [2021-11-21 01:30:44,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581358159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:44,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:30:44,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:30:44,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970545031] [2021-11-21 01:30:44,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:44,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:30:44,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:44,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:30:44,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:30:44,005 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:44,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:44,293 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2021-11-21 01:30:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:30:44,294 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 01:30:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:44,295 INFO L225 Difference]: With dead ends: 102 [2021-11-21 01:30:44,295 INFO L226 Difference]: Without dead ends: 102 [2021-11-21 01:30:44,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:30:44,296 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 332 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:44,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 90 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:30:44,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-21 01:30:44,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2021-11-21 01:30:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 64 states have internal predecessors, (74), 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) [2021-11-21 01:30:44,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2021-11-21 01:30:44,299 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 18 [2021-11-21 01:30:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:44,300 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2021-11-21 01:30:44,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:44,300 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2021-11-21 01:30:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:30:44,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:44,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:30:44,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:30:44,301 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:30:44,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1381727098, now seen corresponding path program 1 times [2021-11-21 01:30:44,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:44,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180833718] [2021-11-21 01:30:44,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:44,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:30:44,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:44,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180833718] [2021-11-21 01:30:44,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180833718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:44,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:30:44,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:30:44,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424660352] [2021-11-21 01:30:44,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:44,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:30:44,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:44,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:30:44,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:30:44,343 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 5 states, 4 states have (on average 3.25) 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) [2021-11-21 01:30:44,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:44,437 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-11-21 01:30:44,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:30:44,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) 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 18 [2021-11-21 01:30:44,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:44,438 INFO L225 Difference]: With dead ends: 65 [2021-11-21 01:30:44,439 INFO L226 Difference]: Without dead ends: 65 [2021-11-21 01:30:44,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:30:44,439 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:44,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:30:44,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-21 01:30:44,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-11-21 01:30:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.6) internal successors, (72), 63 states have internal predecessors, (72), 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) [2021-11-21 01:30:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2021-11-21 01:30:44,443 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 18 [2021-11-21 01:30:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:44,443 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2021-11-21 01:30:44,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) 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) [2021-11-21 01:30:44,443 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2021-11-21 01:30:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:30:44,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:44,444 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:30:44,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:30:44,445 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:30:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1381742866, now seen corresponding path program 1 times [2021-11-21 01:30:44,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:44,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996654030] [2021-11-21 01:30:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:44,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:30:44,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:44,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996654030] [2021-11-21 01:30:44,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996654030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:44,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:30:44,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:30:44,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012661256] [2021-11-21 01:30:44,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:44,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:30:44,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:44,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:30:44,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:30:44,507 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:44,640 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-11-21 01:30:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:30:44,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 01:30:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:44,641 INFO L225 Difference]: With dead ends: 63 [2021-11-21 01:30:44,641 INFO L226 Difference]: Without dead ends: 63 [2021-11-21 01:30:44,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:30:44,642 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 205 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:44,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 52 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:30:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-21 01:30:44,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-21 01:30:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 62 states have internal predecessors, (71), 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) [2021-11-21 01:30:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-11-21 01:30:44,645 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 18 [2021-11-21 01:30:44,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:44,645 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-11-21 01:30:44,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-11-21 01:30:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:30:44,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:44,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:30:44,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:30:44,646 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:30:44,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:44,653 INFO L85 PathProgramCache]: Analyzing trace with hash 115644206, now seen corresponding path program 1 times [2021-11-21 01:30:44,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:44,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716936354] [2021-11-21 01:30:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:44,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:30:44,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:44,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716936354] [2021-11-21 01:30:44,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716936354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:44,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:30:44,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:30:44,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134829604] [2021-11-21 01:30:44,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:44,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:30:44,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:44,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:30:44,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:30:44,755 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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) [2021-11-21 01:30:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:44,955 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-11-21 01:30:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:30:44,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-21 01:30:44,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:44,956 INFO L225 Difference]: With dead ends: 79 [2021-11-21 01:30:44,956 INFO L226 Difference]: Without dead ends: 79 [2021-11-21 01:30:44,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:30:44,957 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 232 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:44,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 90 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:30:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-21 01:30:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2021-11-21 01:30:44,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 65 states have internal predecessors, (74), 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) [2021-11-21 01:30:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-11-21 01:30:44,960 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 19 [2021-11-21 01:30:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:44,961 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-11-21 01:30:44,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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) [2021-11-21 01:30:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-11-21 01:30:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:30:44,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:44,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:30:44,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:30:44,962 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:30:44,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:44,962 INFO L85 PathProgramCache]: Analyzing trace with hash -694845008, now seen corresponding path program 1 times [2021-11-21 01:30:44,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:44,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192640599] [2021-11-21 01:30:44,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:44,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:30:45,157 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:45,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192640599] [2021-11-21 01:30:45,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192640599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:45,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:30:45,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-21 01:30:45,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140149608] [2021-11-21 01:30:45,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:45,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 01:30:45,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:45,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 01:30:45,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:30:45,159 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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) [2021-11-21 01:30:45,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:45,518 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-11-21 01:30:45,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 01:30:45,519 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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 20 [2021-11-21 01:30:45,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:45,520 INFO L225 Difference]: With dead ends: 77 [2021-11-21 01:30:45,520 INFO L226 Difference]: Without dead ends: 77 [2021-11-21 01:30:45,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:30:45,521 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 306 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:45,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 200 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:30:45,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-21 01:30:45,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2021-11-21 01:30:45,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.5) internal successors, (69), 63 states have internal predecessors, (69), 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) [2021-11-21 01:30:45,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2021-11-21 01:30:45,524 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 20 [2021-11-21 01:30:45,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:45,525 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2021-11-21 01:30:45,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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) [2021-11-21 01:30:45,525 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2021-11-21 01:30:45,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:30:45,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:45,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:30:45,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 01:30:45,526 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:30:45,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:45,527 INFO L85 PathProgramCache]: Analyzing trace with hash -709996816, now seen corresponding path program 1 times [2021-11-21 01:30:45,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:45,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129204533] [2021-11-21 01:30:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:45,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:30:45,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:45,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129204533] [2021-11-21 01:30:45,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129204533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:45,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:30:45,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:30:45,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132640554] [2021-11-21 01:30:45,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:45,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:30:45,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:45,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:30:45,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:30:45,566 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-11-21 01:30:45,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:45,651 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2021-11-21 01:30:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:30:45,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 20 [2021-11-21 01:30:45,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:45,653 INFO L225 Difference]: With dead ends: 63 [2021-11-21 01:30:45,653 INFO L226 Difference]: Without dead ends: 63 [2021-11-21 01:30:45,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:30:45,654 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:45,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 72 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:30:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-21 01:30:45,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-21 01:30:45,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 62 states have internal predecessors, (68), 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) [2021-11-21 01:30:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-11-21 01:30:45,656 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 20 [2021-11-21 01:30:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:45,657 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-11-21 01:30:45,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-11-21 01:30:45,657 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-11-21 01:30:45,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:30:45,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:45,658 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:30:45,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 01:30:45,658 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:30:45,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:45,658 INFO L85 PathProgramCache]: Analyzing trace with hash -65355619, now seen corresponding path program 1 times [2021-11-21 01:30:45,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:45,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591856609] [2021-11-21 01:30:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:45,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:30:45,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:45,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591856609] [2021-11-21 01:30:45,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591856609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:30:45,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349405178] [2021-11-21 01:30:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:45,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:45,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:30:45,867 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:30:45,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:30:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-21 01:30:45,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:30:45,956 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 [2021-11-21 01:30:46,109 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:30:46,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-21 01:30:46,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-11-21 01:30:46,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-11-21 01:30:46,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:30:46,601 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 117 treesize of output 80 [2021-11-21 01:30:46,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:30:46,610 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 74 treesize of output 57 [2021-11-21 01:30:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:30:46,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:30:47,031 INFO L354 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2021-11-21 01:30:47,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 488 treesize of output 459 [2021-11-21 01:30:47,173 INFO L354 Elim1Store]: treesize reduction 37, result has 66.7 percent of original size [2021-11-21 01:30:47,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1088 treesize of output 999 [2021-11-21 01:30:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:30:48,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349405178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:30:48,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1104306659] [2021-11-21 01:30:48,308 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:30:48,308 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:30:48,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:30:48,309 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:30:48,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:30:48,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:48,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:48,390 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 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 01:30:48,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:48,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:48,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:48,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:48,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:48,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 01:30:48,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:48,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:30:48,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-21 01:30:48,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-11-21 01:30:48,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:48,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:48,967 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 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:30:49,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:49,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:30:49,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:49,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:30:49,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:49,127 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 23 treesize of output 13 [2021-11-21 01:30:49,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:49,138 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 23 treesize of output 13 [2021-11-21 01:30:49,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:49,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:49,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:49,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 01:30:49,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:49,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:49,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:49,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:49,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:49,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:49,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:49,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:49,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:49,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-21 01:30:50,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:50,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:50,052 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-21 01:30:50,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 357 treesize of output 349 [2021-11-21 01:30:50,108 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:30:50,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 351 treesize of output 358 [2021-11-21 01:30:50,162 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:30:50,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 365 [2021-11-21 01:30:51,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:51,786 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:30:51,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 299 treesize of output 300 [2021-11-21 01:30:51,850 INFO L354 Elim1Store]: treesize reduction 88, result has 25.4 percent of original size [2021-11-21 01:30:51,851 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 5 case distinctions, treesize of input 297 treesize of output 302 [2021-11-21 01:30:51,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:51,915 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:30:51,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 304 treesize of output 305 [2021-11-21 01:30:53,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:53,113 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:30:53,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 301 [2021-11-21 01:30:53,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:53,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:53,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:53,142 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-21 01:30:53,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 346 treesize of output 331 [2021-11-21 01:30:53,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:53,176 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 01:30:53,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 320 [2021-11-21 01:30:53,522 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-21 01:30:53,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 321 treesize of output 325 [2021-11-21 01:30:54,325 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:30:54,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 357 treesize of output 364 [2021-11-21 01:30:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:54,368 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-21 01:30:54,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 364 treesize of output 356 [2021-11-21 01:30:54,407 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:30:54,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 365 [2021-11-21 01:30:55,671 INFO L354 Elim1Store]: treesize reduction 88, result has 25.4 percent of original size [2021-11-21 01:30:55,672 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 5 case distinctions, treesize of input 299 treesize of output 304 [2021-11-21 01:30:55,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:55,718 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:30:55,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 306 treesize of output 307 [2021-11-21 01:30:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:55,767 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:30:55,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 304 treesize of output 305 [2021-11-21 01:30:57,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:57,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:57,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:57,149 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 01:30:57,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 308 treesize of output 293 [2021-11-21 01:30:57,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:57,175 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:30:57,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 289 treesize of output 282 [2021-11-21 01:30:57,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:57,199 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 01:30:57,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 320 [2021-11-21 01:31:00,400 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 [2021-11-21 01:31:00,432 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 [2021-11-21 01:31:00,455 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:31:03,286 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:31:03,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:31:03,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 33 [2021-11-21 01:31:03,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267501508] [2021-11-21 01:31:03,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:31:03,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-21 01:31:03,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:31:03,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-21 01:31:03,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 01:31:03,289 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 34 states, 33 states have (on average 1.878787878787879) internal successors, (62), 34 states have internal predecessors, (62), 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) [2021-11-21 01:31:04,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:31:04,368 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-11-21 01:31:04,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:31:04,368 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.878787878787879) internal successors, (62), 34 states have internal predecessors, (62), 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 [2021-11-21 01:31:04,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:31:04,370 INFO L225 Difference]: With dead ends: 124 [2021-11-21 01:31:04,370 INFO L226 Difference]: Without dead ends: 124 [2021-11-21 01:31:04,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=418, Invalid=2662, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:31:04,372 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 833 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:31:04,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 492 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 483 Invalid, 0 Unknown, 168 Unchecked, 0.4s Time] [2021-11-21 01:31:04,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-21 01:31:04,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 64. [2021-11-21 01:31:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 63 states have internal predecessors, (70), 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) [2021-11-21 01:31:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-11-21 01:31:04,380 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 21 [2021-11-21 01:31:04,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:31:04,380 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-11-21 01:31:04,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.878787878787879) internal successors, (62), 34 states have internal predecessors, (62), 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) [2021-11-21 01:31:04,381 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-11-21 01:31:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:31:04,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:31:04,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:31:04,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:31:04,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:04,601 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:31:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:31:04,601 INFO L85 PathProgramCache]: Analyzing trace with hash -65355620, now seen corresponding path program 1 times [2021-11-21 01:31:04,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:31:04,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665739716] [2021-11-21 01:31:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:04,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:31:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:31:04,838 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:31:04,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665739716] [2021-11-21 01:31:04,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665739716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:31:04,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425623139] [2021-11-21 01:31:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:04,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:04,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:04,841 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:31:04,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:31:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-21 01:31:04,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:31:04,925 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 [2021-11-21 01:31:05,008 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:31:05,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 01:31:05,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-21 01:31:05,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-11-21 01:31:05,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-21 01:31:05,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-21 01:31:05,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:05,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 30 treesize of output 22 [2021-11-21 01:31:05,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:05,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 21 treesize of output 13 [2021-11-21 01:31:05,400 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-21 01:31:05,400 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 69 treesize of output 55 [2021-11-21 01:31:05,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:31:05,512 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 1 case distinctions, treesize of input 50 treesize of output 21 [2021-11-21 01:31:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:31:05,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:31:08,003 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (|ULTIMATE.start_sll_create_~head~0#1.offset| Int)) (let ((.cse6 (+ 4 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse6 |ULTIMATE.start_sll_create_~head~0#1.offset|)))) (let ((.cse4 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse2 (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse3 (+ .cse4 4))) (let ((.cse0 (select (select .cse5 .cse2) .cse3))) (or (= (select |c_#valid| .cse0) 1) (and (= (select (select .cse1 .cse2) .cse3) 0) (= 0 .cse0)) (not (= .cse2 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (not (= .cse4 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|))))))))) is different from false [2021-11-21 01:31:10,190 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_DerPreprocessor_2 Int) (|ULTIMATE.start_sll_create_~head~0#1.offset| Int) (v_DerPreprocessor_1 Int)) (let ((.cse6 (+ |c_ULTIMATE.start_node_create_~temp~0#1.offset| 4))) (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base|) |c_ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_2) .cse6 |ULTIMATE.start_sll_create_~head~0#1.offset|)))) (let ((.cse0 (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base|) |c_ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_1) .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse1 (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (+ .cse0 4))) (let ((.cse2 (select (select .cse5 .cse1) .cse4))) (or (not (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| .cse0)) (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse1)) (= (select |c_#valid| .cse2) 1) (and (= 0 (select (select .cse3 .cse1) .cse4)) (= .cse2 0))))))))) is different from false [2021-11-21 01:31:10,377 INFO L354 Elim1Store]: treesize reduction 35, result has 81.5 percent of original size [2021-11-21 01:31:10,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 112741 treesize of output 103586 [2021-11-21 01:31:15,486 INFO L354 Elim1Store]: treesize reduction 979, result has 37.3 percent of original size [2021-11-21 01:31:15,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 18 new quantified variables, introduced 136 case distinctions, treesize of input 437841 treesize of output 419996 [2021-11-21 01:31:41,341 WARN L227 SmtUtils]: Spent 25.85s on a formula simplification. DAG size of input: 1483 DAG size of output: 1463 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:31:45,707 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 01:31:45,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1069200052] [2021-11-21 01:31:45,710 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:31:45,710 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:31:45,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:31:45,710 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:31:45,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:31:45,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,759 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 [2021-11-21 01:31:45,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 01:31:46,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-11-21 01:31:46,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:31:46,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-11-21 01:31:46,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:31:46,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:31:46,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,231 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 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:31:46,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:46,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2021-11-21 01:31:46,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:46,518 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 23 treesize of output 13 [2021-11-21 01:31:46,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,556 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 01:31:46,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-21 01:31:47,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:47,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:47,087 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:31:47,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 357 treesize of output 339 [2021-11-21 01:31:47,124 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:31:47,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 345 [2021-11-21 01:31:47,163 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:31:47,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 352 [2021-11-21 01:31:48,235 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 01:31:48,235 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 5 case distinctions, treesize of input 299 treesize of output 300 [2021-11-21 01:31:48,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:48,309 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:31:48,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 302 treesize of output 303 [2021-11-21 01:31:48,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:48,351 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:31:48,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 301 [2021-11-21 01:31:49,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:49,573 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:31:49,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 301 [2021-11-21 01:31:49,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,594 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 01:31:49,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 298 treesize of output 283 [2021-11-21 01:31:49,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:49,619 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:31:49,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 279 treesize of output 272 [2021-11-21 01:31:50,206 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-21 01:31:50,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 316 treesize of output 320 [2021-11-21 01:31:51,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:51,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:51,106 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:31:51,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 357 treesize of output 339 [2021-11-21 01:31:51,157 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:31:51,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 345 [2021-11-21 01:31:51,207 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:31:51,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 352 [2021-11-21 01:31:52,105 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 01:31:52,105 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 5 case distinctions, treesize of input 299 treesize of output 300 [2021-11-21 01:31:52,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:52,152 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:31:52,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 302 treesize of output 303 [2021-11-21 01:31:52,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:52,202 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:31:52,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 301 [2021-11-21 01:31:53,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:53,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:53,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:53,778 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 01:31:53,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 308 treesize of output 293 [2021-11-21 01:31:53,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:53,811 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:31:53,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 289 treesize of output 282 [2021-11-21 01:31:53,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:53,844 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 01:31:53,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 320 [2021-11-21 01:31:57,328 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 [2021-11-21 01:31:57,349 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 [2021-11-21 01:31:57,404 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:00,007 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:32:00,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:32:00,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-21 01:32:00,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650859298] [2021-11-21 01:32:00,007 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:32:00,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:32:00,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:00,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:32:00,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1863, Unknown=2, NotChecked=178, Total=2256 [2021-11-21 01:32:00,009 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 14 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) [2021-11-21 01:32:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:00,912 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-11-21 01:32:00,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:32:00,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 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) Word has length 21 [2021-11-21 01:32:00,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:00,913 INFO L225 Difference]: With dead ends: 82 [2021-11-21 01:32:00,913 INFO L226 Difference]: Without dead ends: 82 [2021-11-21 01:32:00,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=423, Invalid=3005, Unknown=2, NotChecked=230, Total=3660 [2021-11-21 01:32:00,914 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 233 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:00,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 181 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:32:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-21 01:32:00,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2021-11-21 01:32:00,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 63 states have internal predecessors, (69), 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) [2021-11-21 01:32:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2021-11-21 01:32:00,916 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 21 [2021-11-21 01:32:00,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:00,917 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2021-11-21 01:32:00,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 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) [2021-11-21 01:32:00,917 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2021-11-21 01:32:00,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:32:00,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:00,917 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:00,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:01,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:01,118 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:32:01,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:01,118 INFO L85 PathProgramCache]: Analyzing trace with hash -535064719, now seen corresponding path program 1 times [2021-11-21 01:32:01,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:01,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481502500] [2021-11-21 01:32:01,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:01,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:32:01,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:01,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481502500] [2021-11-21 01:32:01,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481502500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:32:01,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241249858] [2021-11-21 01:32:01,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:01,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:01,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:01,232 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:01,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:32:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:01,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:32:01,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:01,414 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:32:01,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 19 [2021-11-21 01:32:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:32:01,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:32:01,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241249858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:01,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:32:01,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2021-11-21 01:32:01,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785730716] [2021-11-21 01:32:01,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:01,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:32:01,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:01,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:32:01,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:32:01,445 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-11-21 01:32:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:01,614 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2021-11-21 01:32:01,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:32:01,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) Word has length 21 [2021-11-21 01:32:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:01,615 INFO L225 Difference]: With dead ends: 103 [2021-11-21 01:32:01,615 INFO L226 Difference]: Without dead ends: 103 [2021-11-21 01:32:01,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:32:01,616 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:01,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 142 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 152 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2021-11-21 01:32:01,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-21 01:32:01,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2021-11-21 01:32:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.5757575757575757) internal successors, (104), 82 states have internal predecessors, (104), 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) [2021-11-21 01:32:01,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2021-11-21 01:32:01,619 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 21 [2021-11-21 01:32:01,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:01,620 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2021-11-21 01:32:01,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-11-21 01:32:01,620 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2021-11-21 01:32:01,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:32:01,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:01,621 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:01,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:01,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:01,833 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:32:01,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:01,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1617760326, now seen corresponding path program 1 times [2021-11-21 01:32:01,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:01,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231187024] [2021-11-21 01:32:01,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:01,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:32:01,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:01,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231187024] [2021-11-21 01:32:01,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231187024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:32:01,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639000420] [2021-11-21 01:32:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:01,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:01,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:01,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:01,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:32:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:01,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:32:01,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:01,990 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 7 treesize of output 3 [2021-11-21 01:32:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:32:02,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:32:02,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639000420] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:32:02,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1474945978] [2021-11-21 01:32:02,036 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:32:02,036 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:02,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:02,037 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:02,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:02,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,058 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 [2021-11-21 01:32:02,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 01:32:02,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-11-21 01:32:02,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,460 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:32:02,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-21 01:32:02,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:32:02,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,628 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 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:32:02,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:32:02,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,786 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 01:32:02,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:02,841 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 23 treesize of output 13 [2021-11-21 01:32:02,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:02,881 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 23 treesize of output 13 [2021-11-21 01:32:02,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:03,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:03,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:03,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-21 01:32:03,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:03,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:03,495 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:32:03,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 357 treesize of output 339 [2021-11-21 01:32:03,535 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:32:03,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 345 [2021-11-21 01:32:03,573 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:32:03,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 352 [2021-11-21 01:32:04,756 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 01:32:04,756 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 5 case distinctions, treesize of input 396 treesize of output 389 [2021-11-21 01:32:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:04,833 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:32:04,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 399 treesize of output 400 [2021-11-21 01:32:04,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:04,904 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:32:04,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 397 treesize of output 398 [2021-11-21 01:32:06,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:06,289 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:32:06,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 301 [2021-11-21 01:32:06,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:06,323 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:32:06,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 298 treesize of output 291 [2021-11-21 01:32:06,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,350 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-21 01:32:06,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 336 treesize of output 321 [2021-11-21 01:32:06,871 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-21 01:32:06,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 316 treesize of output 320 [2021-11-21 01:32:07,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,597 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:32:07,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 357 treesize of output 339 [2021-11-21 01:32:07,637 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:32:07,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 345 [2021-11-21 01:32:07,672 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:32:07,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 352 [2021-11-21 01:32:08,687 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 01:32:08,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 299 treesize of output 300 [2021-11-21 01:32:08,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,746 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:32:08,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 302 treesize of output 303 [2021-11-21 01:32:08,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,794 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:32:08,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 301 [2021-11-21 01:32:09,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:09,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:09,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:09,726 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 01:32:09,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 308 treesize of output 293 [2021-11-21 01:32:09,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:09,752 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:32:09,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 289 treesize of output 282 [2021-11-21 01:32:09,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:09,777 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:32:09,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 279 treesize of output 272 [2021-11-21 01:32:13,428 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 [2021-11-21 01:32:13,444 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 [2021-11-21 01:32:13,492 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:15,568 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:32:15,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:32:15,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2021-11-21 01:32:15,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132311453] [2021-11-21 01:32:15,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:32:15,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:32:15,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:15,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:32:15,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:32:15,570 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:15,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:15,698 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2021-11-21 01:32:15,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:32:15,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-21 01:32:15,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:15,701 INFO L225 Difference]: With dead ends: 89 [2021-11-21 01:32:15,701 INFO L226 Difference]: Without dead ends: 89 [2021-11-21 01:32:15,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:32:15,702 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 41 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:15,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 66 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:32:15,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-21 01:32:15,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-11-21 01:32:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.6) internal successors, (112), 86 states have internal predecessors, (112), 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) [2021-11-21 01:32:15,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2021-11-21 01:32:15,706 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 23 [2021-11-21 01:32:15,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:15,706 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2021-11-21 01:32:15,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:15,706 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2021-11-21 01:32:15,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:32:15,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:15,707 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:15,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-21 01:32:15,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:15,913 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:32:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:15,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1617760327, now seen corresponding path program 1 times [2021-11-21 01:32:15,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:15,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701006467] [2021-11-21 01:32:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:15,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:32:16,016 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:16,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701006467] [2021-11-21 01:32:16,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701006467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:32:16,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954178904] [2021-11-21 01:32:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:16,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:16,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:16,018 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:16,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:32:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:16,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:32:16,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:16,142 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 7 treesize of output 3 [2021-11-21 01:32:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:32:16,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:32:16,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954178904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:32:16,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500337998] [2021-11-21 01:32:16,247 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:32:16,248 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:16,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:16,248 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:16,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:16,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,289 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 [2021-11-21 01:32:16,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 01:32:16,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,606 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:32:16,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-11-21 01:32:16,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-11-21 01:32:16,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:32:16,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:32:16,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:32:16,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:16,942 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 01:32:16,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:16,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 01:32:17,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:17,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2021-11-21 01:32:17,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:17,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:17,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:17,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:17,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:17,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:17,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:17,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:17,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:17,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-21 01:32:17,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:17,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:17,697 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:32:17,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 357 treesize of output 339 [2021-11-21 01:32:17,734 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:32:17,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 345 [2021-11-21 01:32:17,778 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:32:17,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 352 [2021-11-21 01:32:18,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:18,699 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:32:18,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 299 treesize of output 300 [2021-11-21 01:32:18,746 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 01:32:18,747 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 5 case distinctions, treesize of input 297 treesize of output 298 [2021-11-21 01:32:18,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:18,790 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:32:18,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 301 [2021-11-21 01:32:19,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:19,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:19,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:19,918 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 01:32:19,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 308 treesize of output 293 [2021-11-21 01:32:19,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:19,972 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:32:19,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 289 treesize of output 282 [2021-11-21 01:32:19,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:20,004 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 01:32:20,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 320 [2021-11-21 01:32:20,703 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-21 01:32:20,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 316 treesize of output 320 [2021-11-21 01:32:21,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,373 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:32:21,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 357 treesize of output 339 [2021-11-21 01:32:21,412 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:32:21,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 345 [2021-11-21 01:32:21,450 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:32:21,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 352 [2021-11-21 01:32:22,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:22,393 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:32:22,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 299 treesize of output 300 [2021-11-21 01:32:22,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:22,434 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:32:22,435 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 4 case distinctions, treesize of input 297 treesize of output 298 [2021-11-21 01:32:22,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:22,479 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:32:22,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 301 [2021-11-21 01:32:23,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:23,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:23,457 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:32:23,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 301 [2021-11-21 01:32:23,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:23,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:23,500 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:32:23,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 298 treesize of output 291 [2021-11-21 01:32:23,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:23,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:23,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:23,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:23,527 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-21 01:32:23,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 336 treesize of output 321 [2021-11-21 01:32:27,304 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 [2021-11-21 01:32:27,334 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 [2021-11-21 01:32:27,425 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:29,646 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:32:29,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:32:29,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 10 [2021-11-21 01:32:29,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741712175] [2021-11-21 01:32:29,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:32:29,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:32:29,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:32:29,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:32:29,647 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:30,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:30,209 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2021-11-21 01:32:30,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:32:30,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-21 01:32:30,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:30,211 INFO L225 Difference]: With dead ends: 122 [2021-11-21 01:32:30,211 INFO L226 Difference]: Without dead ends: 122 [2021-11-21 01:32:30,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=251, Invalid=1081, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:32:30,212 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 296 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:30,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 133 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:32:30,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-21 01:32:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-11-21 01:32:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 70 states have (on average 1.542857142857143) internal successors, (108), 85 states have internal predecessors, (108), 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) [2021-11-21 01:32:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-11-21 01:32:30,216 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 23 [2021-11-21 01:32:30,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:30,217 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-11-21 01:32:30,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-11-21 01:32:30,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 01:32:30,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:30,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:30,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:30,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-21 01:32:30,433 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:32:30,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:30,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1389037381, now seen corresponding path program 1 times [2021-11-21 01:32:30,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:30,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204092899] [2021-11-21 01:32:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:30,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:30,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:30,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204092899] [2021-11-21 01:32:30,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204092899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:32:30,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581306772] [2021-11-21 01:32:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:30,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:30,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:30,609 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:30,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:32:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:30,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-21 01:32:30,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:30,852 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 [2021-11-21 01:32:30,970 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 33 treesize of output 25 [2021-11-21 01:32:31,025 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-21 01:32:31,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2021-11-21 01:32:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:31,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:31,109 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 34 treesize of output 26 [2021-11-21 01:32:31,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:31,144 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 88 treesize of output 88 [2021-11-21 01:32:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 31 treesize of output 27 [2021-11-21 01:32:31,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 4 [2021-11-21 01:32:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:31,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581306772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:32:31,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1179635342] [2021-11-21 01:32:31,295 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-21 01:32:31,295 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:31,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:31,296 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:31,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:31,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,345 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 [2021-11-21 01:32:31,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 01:32:31,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-11-21 01:32:31,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-21 01:32:31,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,817 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:32:31,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:32:31,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:32:31,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,000 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 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 01:32:32,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,169 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 01:32:32,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:32,192 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 23 treesize of output 13 [2021-11-21 01:32:32,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:32,272 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 23 treesize of output 13 [2021-11-21 01:32:32,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-21 01:32:32,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,884 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-21 01:32:32,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 357 treesize of output 349 [2021-11-21 01:32:32,945 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:32:32,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 351 treesize of output 358 [2021-11-21 01:32:32,978 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:32:32,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 365 [2021-11-21 01:32:34,155 INFO L354 Elim1Store]: treesize reduction 88, result has 25.4 percent of original size [2021-11-21 01:32:34,155 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 5 case distinctions, treesize of input 299 treesize of output 304 [2021-11-21 01:32:34,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:34,197 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:32:34,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 306 treesize of output 307 [2021-11-21 01:32:34,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:34,235 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:32:34,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 304 treesize of output 305 [2021-11-21 01:32:35,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:35,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:35,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:35,511 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 01:32:35,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 308 treesize of output 293 [2021-11-21 01:32:35,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:35,553 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:32:35,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 289 treesize of output 282 [2021-11-21 01:32:35,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:35,585 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 01:32:35,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 320 [2021-11-21 01:32:36,091 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-21 01:32:36,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 316 treesize of output 320 [2021-11-21 01:32:36,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,963 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-21 01:32:36,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 357 treesize of output 349 [2021-11-21 01:32:37,003 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:32:37,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 351 treesize of output 358 [2021-11-21 01:32:37,040 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:32:37,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 365 [2021-11-21 01:32:38,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:38,469 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:32:38,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 396 treesize of output 397 [2021-11-21 01:32:38,545 INFO L354 Elim1Store]: treesize reduction 88, result has 25.4 percent of original size [2021-11-21 01:32:38,545 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 5 case distinctions, treesize of input 394 treesize of output 391 [2021-11-21 01:32:38,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:38,586 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 01:32:38,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 401 treesize of output 402 [2021-11-21 01:32:40,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:40,106 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 01:32:40,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 301 [2021-11-21 01:32:40,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:40,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:40,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:40,125 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-21 01:32:40,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 346 treesize of output 331 [2021-11-21 01:32:40,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:40,147 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 01:32:40,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 320 [2021-11-21 01:32:43,569 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 [2021-11-21 01:32:43,590 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 [2021-11-21 01:32:43,634 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 [2021-11-21 01:32:43,914 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 [2021-11-21 01:32:43,953 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 [2021-11-21 01:32:43,992 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:46,686 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:32:46,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:32:46,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2021-11-21 01:32:46,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764299099] [2021-11-21 01:32:46,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:32:46,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 01:32:46,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:46,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 01:32:46,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-11-21 01:32:46,689 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 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) [2021-11-21 01:32:46,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:46,985 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2021-11-21 01:32:46,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 01:32:46,986 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-21 01:32:46,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:46,986 INFO L225 Difference]: With dead ends: 130 [2021-11-21 01:32:46,987 INFO L226 Difference]: Without dead ends: 130 [2021-11-21 01:32:46,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=289, Invalid=1691, Unknown=0, NotChecked=0, Total=1980 [2021-11-21 01:32:46,988 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 209 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:46,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 521 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 325 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2021-11-21 01:32:46,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-21 01:32:46,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 89. [2021-11-21 01:32:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 88 states have internal predecessors, (112), 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) [2021-11-21 01:32:46,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2021-11-21 01:32:46,992 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 24 [2021-11-21 01:32:46,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:46,992 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2021-11-21 01:32:46,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 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) [2021-11-21 01:32:46,992 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2021-11-21 01:32:46,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 01:32:46,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:46,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:47,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:47,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-21 01:32:47,205 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-11-21 01:32:47,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:47,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1389034297, now seen corresponding path program 2 times [2021-11-21 01:32:47,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:47,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086100751] [2021-11-21 01:32:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:47,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:47,557 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:47,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086100751] [2021-11-21 01:32:47,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086100751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:32:47,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464726009] [2021-11-21 01:32:47,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:32:47,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:47,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:47,558 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:47,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7051ad62-ee07-4d33-a476-987ba4fa8204/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:32:47,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:32:47,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:32:47,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-21 01:32:47,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:47,758 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 [2021-11-21 01:32:47,763 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 [2021-11-21 01:32:47,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-21 01:32:47,843 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 23 treesize of output 11 [2021-11-21 01:32:47,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:47,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 21 treesize of output 13 [2021-11-21 01:32:47,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:47,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 21 treesize of output 13 [2021-11-21 01:32:47,950 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:32:47,951 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 [2021-11-21 01:32:48,021 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 23 treesize of output 22 [2021-11-21 01:32:48,032 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 23 treesize of output 22 [2021-11-21 01:32:48,113 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 01:32:48,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 58 [2021-11-21 01:32:48,125 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 01:32:48,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2021-11-21 01:32:48,231 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-21 01:32:48,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2021-11-21 01:32:48,253 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-21 01:32:48,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 74 [2021-11-21 01:32:48,735 INFO L354 Elim1Store]: treesize reduction 82, result has 3.5 percent of original size [2021-11-21 01:32:48,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 125 treesize of output 56 [2021-11-21 01:32:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:48,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:51,187 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse7 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse7 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse7 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (select (select .cse4 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (let ((.cse5 (+ .cse6 4))) (let ((.cse2 (select (select .cse1 .cse0) .cse5)) (.cse3 (+ (select (select .cse4 .cse0) .cse5) 4))) (and (= (select (select .cse1 .cse2) .cse3) 0) (= 0 (select (select .cse4 .cse2) .cse3))))) (not (= .cse6 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))))))) is different from false [2021-11-21 01:32:53,314 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (|ULTIMATE.start_main_~#s~0#1.base| Int) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int)) (let ((.cse7 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base|) |c_ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_4) .cse7 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base|) |c_ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_3) .cse7 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse0 (select (select .cse2 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse0)) (not (= .cse1 |ULTIMATE.start_sll_create_~new_head~0#1.offset|)) (let ((.cse6 (+ .cse1 4))) (let ((.cse3 (select (select .cse2 .cse0) .cse6)) (.cse4 (+ (select (select .cse5 .cse0) .cse6) 4))) (and (= (select (select .cse2 .cse3) .cse4) 0) (= (select (select .cse5 .cse3) .cse4) 0))))))))) is different from false [2021-11-21 01:32:55,434 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (|ULTIMATE.start_node_create_~temp~0#1.offset| Int) (|ULTIMATE.start_main_~#s~0#1.base| Int) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int)) (let ((.cse7 (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 4)) (.cse8 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse7 0) |ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_4) .cse8 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse7 0) |ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_3) .cse8 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse0 (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (select (select .cse2 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_node_create_~temp~0#1.base|)) (not (= .cse1 |ULTIMATE.start_sll_create_~new_head~0#1.offset|)) (let ((.cse6 (+ .cse1 4))) (let ((.cse3 (select (select .cse5 .cse0) .cse6)) (.cse4 (+ (select (select .cse2 .cse0) .cse6) 4))) (and (= (select (select .cse2 .cse3) .cse4) 0) (= (select (select .cse5 .cse3) .cse4) 0))))))))) is different from false [2021-11-21 01:32:56,113 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:32:56,114 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 712 treesize of output 711 [2021-11-21 01:32:58,566 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.offset_42| Int) (|ULTIMATE.start_node_create_~temp~0#1.offset| Int) (|v_ULTIMATE.start_node_create_~temp~0#1.base_43| Int) (|ULTIMATE.start_main_~#s~0#1.base| Int) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int)) (let ((.cse8 (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 4)) (.cse9 (+ 4 |v_ULTIMATE.start_sll_create_~new_head~0#1.offset_42|)) (.cse10 (+ 4 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse2 (let ((.cse11 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse10 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (store .cse11 |v_ULTIMATE.start_node_create_~temp~0#1.base_43| (store (store (store (select .cse11 |v_ULTIMATE.start_node_create_~temp~0#1.base_43|) .cse8 0) |ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_4) .cse9 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|)))) (.cse5 (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse10 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (store .cse7 |v_ULTIMATE.start_node_create_~temp~0#1.base_43| (store (store (store (select .cse7 |v_ULTIMATE.start_node_create_~temp~0#1.base_43|) .cse8 0) |ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_3) .cse9 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|))))) (let ((.cse1 (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse0 (select (select .cse2 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |v_ULTIMATE.start_sll_create_~new_head~0#1.offset_42|)) (not (= .cse1 |v_ULTIMATE.start_node_create_~temp~0#1.base_43|)) (= |v_ULTIMATE.start_node_create_~temp~0#1.base_43| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) (let ((.cse6 (+ 4 .cse0))) (let ((.cse3 (select (select .cse5 .cse1) .cse6)) (.cse4 (+ (select (select .cse2 .cse1) .cse6) 4))) (and (= (select (select .cse2 .cse3) .cse4) 0) (= (select (select .cse5 .cse3) .cse4) 0))))))))) is different from false [2021-11-21 01:37:01,989 WARN L227 SmtUtils]: Spent 2.95m on a formula simplification. DAG size of input: 2914 DAG size of output: 974 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:37:01,992 INFO L354 Elim1Store]: treesize reduction 126596, result has 18.8 percent of original size [2021-11-21 01:37:02,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 43 select indices, 43 select index equivalence classes, 0 disjoint index pairs (out of 903 index pairs), introduced 51 new quantified variables, introduced 903 case distinctions, treesize of input 4762207909445813213 treesize of output 4724947767332941472