./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_update_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_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/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_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/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_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/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 4fecbd384f63aa34e01807a3a6735a322a2435f1312f0df3ed763fde7f43fe0a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:14:10,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:14:10,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:14:10,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:14:10,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:14:10,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:14:10,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:14:10,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:14:10,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:14:10,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:14:10,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:14:10,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:14:10,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:14:10,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:14:10,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:14:10,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:14:10,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:14:10,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:14:10,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:14:10,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:14:10,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:14:10,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:14:10,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:14:10,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:14:10,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:14:10,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:14:10,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:14:10,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:14:10,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:14:10,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:14:10,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:14:10,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:14:10,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:14:10,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:14:10,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:14:10,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:14:10,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:14:10,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:14:10,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:14:10,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:14:10,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:14:10,313 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-20 23:14:10,369 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:14:10,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:14:10,370 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:14:10,370 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:14:10,372 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:14:10,372 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:14:10,372 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:14:10,372 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:14:10,373 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:14:10,373 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:14:10,374 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:14:10,375 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:14:10,375 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:14:10,375 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:14:10,375 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:14:10,376 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:14:10,376 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:14:10,376 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:14:10,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 23:14:10,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 23:14:10,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:14:10,378 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:14:10,378 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:14:10,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:14:10,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:14:10,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:14:10,379 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 23:14:10,380 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 23:14:10,380 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 23:14:10,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:14:10,381 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 23:14:10,381 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:14:10,381 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:14:10,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:14:10,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:14:10,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:14:10,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:14:10,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:14:10,383 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:14:10,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:14:10,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:14:10,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:14:10,385 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_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fecbd384f63aa34e01807a3a6735a322a2435f1312f0df3ed763fde7f43fe0a [2021-11-20 23:14:10,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:14:10,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:14:10,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:14:10,787 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:14:10,788 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:14:10,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2021-11-20 23:14:10,904 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/data/dfcaa90e4/c16cf74565ef4160806f6a9bb1df3dc6/FLAG516d658c3 [2021-11-20 23:14:11,607 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:14:11,608 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2021-11-20 23:14:11,624 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/data/dfcaa90e4/c16cf74565ef4160806f6a9bb1df3dc6/FLAG516d658c3 [2021-11-20 23:14:11,881 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/data/dfcaa90e4/c16cf74565ef4160806f6a9bb1df3dc6 [2021-11-20 23:14:11,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:14:11,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:14:11,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:14:11,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:14:11,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:14:11,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:14:11" (1/1) ... [2021-11-20 23:14:11,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@791d1d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:11, skipping insertion in model container [2021-11-20 23:14:11,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:14:11" (1/1) ... [2021-11-20 23:14:11,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:14:11,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:14:12,362 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_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i[24436,24449] [2021-11-20 23:14:12,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:14:12,379 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:14:12,487 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_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i[24436,24449] [2021-11-20 23:14:12,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:14:12,537 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:14:12,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12 WrapperNode [2021-11-20 23:14:12,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:14:12,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:14:12,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:14:12,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:14:12,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,620 INFO L137 Inliner]: procedures = 126, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 133 [2021-11-20 23:14:12,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:14:12,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:14:12,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:14:12,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:14:12,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:14:12,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:14:12,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:14:12,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:14:12,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:14:12,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:14:12,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:14:12,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:14:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:14:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:14:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-20 23:14:12,771 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-20 23:14:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:14:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:14:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:14:12,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:14:12,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:14:12,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:14:12,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:14:12,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:14:12,894 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:14:12,896 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:14:13,297 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:14:13,386 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:14:13,387 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-20 23:14:13,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:14:13 BoogieIcfgContainer [2021-11-20 23:14:13,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:14:13,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:14:13,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:14:13,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:14:13,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:14:11" (1/3) ... [2021-11-20 23:14:13,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e65a15b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:14:13, skipping insertion in model container [2021-11-20 23:14:13,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (2/3) ... [2021-11-20 23:14:13,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e65a15b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:14:13, skipping insertion in model container [2021-11-20 23:14:13,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:14:13" (3/3) ... [2021-11-20 23:14:13,410 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_update_all_reverse.i [2021-11-20 23:14:13,417 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:14:13,419 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-11-20 23:14:13,492 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:14:13,501 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 [2021-11-20 23:14:13,501 INFO L340 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2021-11-20 23:14:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 33 states have (on average 2.121212121212121) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:14:13,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:13,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:14:13,531 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:14:13,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:13,539 INFO L85 PathProgramCache]: Analyzing trace with hash 198170915, now seen corresponding path program 1 times [2021-11-20 23:14:13,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:13,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147214906] [2021-11-20 23:14:13,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:13,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:13,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:13,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147214906] [2021-11-20 23:14:13,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147214906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:13,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:13,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:14:13,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119205992] [2021-11-20 23:14:13,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:13,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:14:13,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:14:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:14:13,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:14:13,823 INFO L87 Difference]: Start difference. First operand has 65 states, 33 states have (on average 2.121212121212121) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:13,926 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-11-20 23:14:13,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:14:13,929 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 23:14:13,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:13,938 INFO L225 Difference]: With dead ends: 63 [2021-11-20 23:14:13,938 INFO L226 Difference]: Without dead ends: 61 [2021-11-20 23:14:13,940 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 [2021-11-20 23:14:13,945 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:13,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 79 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:14:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-20 23:14:13,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-20 23:14:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 32 states have (on average 2.0) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-11-20 23:14:14,008 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 5 [2021-11-20 23:14:14,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:14,008 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-11-20 23:14:14,008 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-11-20 23:14:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:14:14,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:14,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:14:14,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:14:14,009 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:14:14,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:14,011 INFO L85 PathProgramCache]: Analyzing trace with hash 198170916, now seen corresponding path program 1 times [2021-11-20 23:14:14,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:14,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429730062] [2021-11-20 23:14:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:14,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:14,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:14,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429730062] [2021-11-20 23:14:14,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429730062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:14,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:14,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:14:14,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322263028] [2021-11-20 23:14:14,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:14,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:14:14,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:14:14,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:14:14,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:14:14,155 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:14,268 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-11-20 23:14:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:14:14,269 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 23:14:14,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:14,274 INFO L225 Difference]: With dead ends: 59 [2021-11-20 23:14:14,278 INFO L226 Difference]: Without dead ends: 59 [2021-11-20 23:14:14,279 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 [2021-11-20 23:14:14,282 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:14,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 83 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:14:14,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-20 23:14:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-20 23:14:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.9375) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-11-20 23:14:14,304 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 5 [2021-11-20 23:14:14,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:14,311 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-11-20 23:14:14,313 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:14,313 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-11-20 23:14:14,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:14:14,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:14,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:14,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:14:14,315 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:14:14,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:14,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1927971198, now seen corresponding path program 1 times [2021-11-20 23:14:14,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:14,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692348842] [2021-11-20 23:14:14,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:14,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:14,416 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:14,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692348842] [2021-11-20 23:14:14,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692348842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:14,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:14,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:14:14,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410722479] [2021-11-20 23:14:14,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:14,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:14:14,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:14:14,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:14:14,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:14:14,420 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:14:14,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:14,475 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-11-20 23:14:14,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:14:14,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-20 23:14:14,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:14,481 INFO L225 Difference]: With dead ends: 65 [2021-11-20 23:14:14,481 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 23:14:14,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:14:14,490 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:14,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 95 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:14:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 23:14:14,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2021-11-20 23:14:14,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2021-11-20 23:14:14,508 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 10 [2021-11-20 23:14:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:14,509 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2021-11-20 23:14:14,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:14:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2021-11-20 23:14:14,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:14:14,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:14,509 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:14,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:14:14,510 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:14:14,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:14,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1377774572, now seen corresponding path program 1 times [2021-11-20 23:14:14,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:14,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663231534] [2021-11-20 23:14:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:14,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 23:14:14,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:14,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663231534] [2021-11-20 23:14:14,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663231534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:14,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:14,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:14:14,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138190982] [2021-11-20 23:14:14,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:14,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:14:14,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:14:14,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:14:14,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:14:14,636 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:14:14,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:14,825 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2021-11-20 23:14:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:14:14,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-20 23:14:14,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:14,829 INFO L225 Difference]: With dead ends: 79 [2021-11-20 23:14:14,829 INFO L226 Difference]: Without dead ends: 79 [2021-11-20 23:14:14,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:14:14,831 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:14,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 140 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:14:14,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-20 23:14:14,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2021-11-20 23:14:14,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.878787878787879) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:14,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-11-20 23:14:14,839 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 17 [2021-11-20 23:14:14,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:14,840 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-11-20 23:14:14,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:14:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-11-20 23:14:14,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:14:14,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:14,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:14,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:14:14,842 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:14:14,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:14,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1377774571, now seen corresponding path program 1 times [2021-11-20 23:14:14,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:14,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894845190] [2021-11-20 23:14:14,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:14,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:14:14,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:14,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894845190] [2021-11-20 23:14:14,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894845190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:14,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:14,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:14:14,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867556] [2021-11-20 23:14:14,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:14,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:14:14,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:14:14,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:14:14,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:14:14,996 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:14:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:15,141 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-11-20 23:14:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:14:15,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-20 23:14:15,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:15,146 INFO L225 Difference]: With dead ends: 59 [2021-11-20 23:14:15,146 INFO L226 Difference]: Without dead ends: 59 [2021-11-20 23:14:15,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:14:15,149 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 54 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:15,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 149 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:14:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-20 23:14:15,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-11-20 23:14:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 54 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-11-20 23:14:15,162 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 17 [2021-11-20 23:14:15,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:15,163 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-11-20 23:14:15,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:14:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-11-20 23:14:15,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:14:15,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:15,164 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:15,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:14:15,165 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:14:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:15,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1191271115, now seen corresponding path program 1 times [2021-11-20 23:14:15,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:15,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583193541] [2021-11-20 23:14:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:15,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:14:15,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:15,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583193541] [2021-11-20 23:14:15,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583193541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:14:15,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835249872] [2021-11-20 23:14:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:15,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:14:15,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:14:15,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:14:15,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:14:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:14:15,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:15,651 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 [2021-11-20 23:14:15,909 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 23:14:15,910 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 [2021-11-20 23:14:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:16,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:16,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835249872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:14:16,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [237740418] [2021-11-20 23:14:16,149 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-20 23:14:16,149 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:14:16,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:14:16,160 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:14:16,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:14:16,358 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 [2021-11-20 23:14:16,374 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 [2021-11-20 23:14:16,419 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 15 treesize of output 1 [2021-11-20 23:14:16,429 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 11 treesize of output 7 [2021-11-20 23:14:16,443 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 11 treesize of output 7 [2021-11-20 23:14:16,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:16,500 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 27 treesize of output 11 [2021-11-20 23:14:16,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:16,520 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 27 treesize of output 11 [2021-11-20 23:14:16,533 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 [2021-11-20 23:14:17,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:17,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:17,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 23:14:17,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:17,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 23:14:17,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 23:14:17,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:17,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:17,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 23:14:17,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:18,146 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 19 treesize of output 11 [2021-11-20 23:14:18,159 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 19 treesize of output 11 [2021-11-20 23:14:18,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:18,252 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 [2021-11-20 23:14:18,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 23:14:18,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:18,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 23:14:18,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:18,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:18,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:18,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:18,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:18,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 23:14:18,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 23:14:19,162 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 19 treesize of output 11 [2021-11-20 23:14:19,182 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 19 treesize of output 11 [2021-11-20 23:14:19,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:19,260 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 [2021-11-20 23:14:19,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 23:14:19,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:19,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 23:14:19,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:19,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:19,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 23:14:19,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:19,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-20 23:14:19,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:19,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-20 23:14:20,725 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2021-11-20 23:14:22,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:22,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 23:14:22,894 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 23:14:22,899 INFO L158 Benchmark]: Toolchain (without parser) took 11011.90ms. Allocated memory was 83.9MB in the beginning and 151.0MB in the end (delta: 67.1MB). Free memory was 48.2MB in the beginning and 104.5MB in the end (delta: -56.3MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2021-11-20 23:14:22,899 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 83.9MB. Free memory was 62.7MB in the beginning and 62.7MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:14:22,900 INFO L158 Benchmark]: CACSL2BoogieTranslator took 652.76ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 48.1MB in the beginning and 69.8MB in the end (delta: -21.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 23:14:22,900 INFO L158 Benchmark]: Boogie Procedure Inliner took 77.67ms. Allocated memory is still 100.7MB. Free memory was 69.8MB in the beginning and 67.7MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:14:22,901 INFO L158 Benchmark]: Boogie Preprocessor took 57.08ms. Allocated memory is still 100.7MB. Free memory was 67.7MB in the beginning and 66.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:14:22,901 INFO L158 Benchmark]: RCFGBuilder took 713.77ms. Allocated memory is still 100.7MB. Free memory was 66.0MB in the beginning and 46.8MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-20 23:14:22,902 INFO L158 Benchmark]: TraceAbstraction took 9503.71ms. Allocated memory was 100.7MB in the beginning and 151.0MB in the end (delta: 50.3MB). Free memory was 46.3MB in the beginning and 104.5MB in the end (delta: -58.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:14:22,912 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 83.9MB. Free memory was 62.7MB in the beginning and 62.7MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 652.76ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 48.1MB in the beginning and 69.8MB in the end (delta: -21.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 77.67ms. Allocated memory is still 100.7MB. Free memory was 69.8MB in the beginning and 67.7MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 57.08ms. Allocated memory is still 100.7MB. Free memory was 67.7MB in the beginning and 66.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 713.77ms. Allocated memory is still 100.7MB. Free memory was 66.0MB in the beginning and 46.8MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 9503.71ms. Allocated memory was 100.7MB in the beginning and 151.0MB in the end (delta: 50.3MB). Free memory was 46.3MB in the beginning and 104.5MB in the end (delta: -58.2MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-20 23:14:22,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/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_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/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 4fecbd384f63aa34e01807a3a6735a322a2435f1312f0df3ed763fde7f43fe0a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:14:25,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:14:25,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:14:25,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:14:25,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:14:25,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:14:25,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:14:25,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:14:25,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:14:25,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:14:25,707 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:14:25,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:14:25,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:14:25,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:14:25,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:14:25,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:14:25,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:14:25,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:14:25,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:14:25,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:14:25,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:14:25,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:14:25,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:14:25,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:14:25,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:14:25,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:14:25,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:14:25,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:14:25,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:14:25,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:14:25,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:14:25,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:14:25,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:14:25,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:14:25,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:14:25,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:14:25,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:14:25,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:14:25,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:14:25,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:14:25,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:14:25,784 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-20 23:14:25,843 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:14:25,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:14:25,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:14:25,845 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:14:25,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:14:25,846 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:14:25,847 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:14:25,847 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:14:25,847 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:14:25,848 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:14:25,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:14:25,849 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:14:25,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 23:14:25,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 23:14:25,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:14:25,852 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:14:25,853 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:14:25,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:14:25,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:14:25,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:14:25,854 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 23:14:25,854 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 23:14:25,854 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 23:14:25,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:14:25,855 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 23:14:25,855 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 23:14:25,855 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 23:14:25,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:14:25,856 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:14:25,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:14:25,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 23:14:25,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:14:25,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:14:25,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:14:25,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:14:25,858 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 23:14:25,858 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 23:14:25,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:14:25,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:14:25,859 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fecbd384f63aa34e01807a3a6735a322a2435f1312f0df3ed763fde7f43fe0a [2021-11-20 23:14:26,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:14:26,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:14:26,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:14:26,406 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:14:26,407 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:14:26,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2021-11-20 23:14:26,489 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/data/704637226/de40e855f5a543408cb6b2692b7041dd/FLAG09558cb5f [2021-11-20 23:14:27,239 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:14:27,239 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2021-11-20 23:14:27,256 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/data/704637226/de40e855f5a543408cb6b2692b7041dd/FLAG09558cb5f [2021-11-20 23:14:27,440 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/data/704637226/de40e855f5a543408cb6b2692b7041dd [2021-11-20 23:14:27,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:14:27,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:14:27,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:14:27,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:14:27,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:14:27,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:14:27" (1/1) ... [2021-11-20 23:14:27,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@551eebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:27, skipping insertion in model container [2021-11-20 23:14:27,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:14:27" (1/1) ... [2021-11-20 23:14:27,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:14:27,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:14:27,899 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_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i[24436,24449] [2021-11-20 23:14:27,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:14:27,916 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:14:27,966 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_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i[24436,24449] [2021-11-20 23:14:27,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:14:28,006 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:14:28,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:28 WrapperNode [2021-11-20 23:14:28,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:14:28,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:14:28,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:14:28,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:14:28,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:28" (1/1) ... [2021-11-20 23:14:28,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:28" (1/1) ... [2021-11-20 23:14:28,067 INFO L137 Inliner]: procedures = 129, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 133 [2021-11-20 23:14:28,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:14:28,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:14:28,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:14:28,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:14:28,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:28" (1/1) ... [2021-11-20 23:14:28,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:28" (1/1) ... [2021-11-20 23:14:28,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:28" (1/1) ... [2021-11-20 23:14:28,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:28" (1/1) ... [2021-11-20 23:14:28,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:28" (1/1) ... [2021-11-20 23:14:28,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:28" (1/1) ... [2021-11-20 23:14:28,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:28" (1/1) ... [2021-11-20 23:14:28,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:14:28,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:14:28,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:14:28,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:14:28,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:28" (1/1) ... [2021-11-20 23:14:28,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:14:28,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:14:28,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:14:28,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:14:28,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 23:14:28,200 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-20 23:14:28,200 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-20 23:14:28,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:14:28,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:14:28,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:14:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:14:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:14:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 23:14:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:14:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:14:28,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:14:28,386 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:14:28,388 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:14:28,976 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:14:28,990 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:14:28,992 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-20 23:14:28,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:14:28 BoogieIcfgContainer [2021-11-20 23:14:28,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:14:28,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:14:28,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:14:29,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:14:29,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:14:27" (1/3) ... [2021-11-20 23:14:29,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f02bdf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:14:29, skipping insertion in model container [2021-11-20 23:14:29,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:28" (2/3) ... [2021-11-20 23:14:29,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f02bdf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:14:29, skipping insertion in model container [2021-11-20 23:14:29,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:14:28" (3/3) ... [2021-11-20 23:14:29,007 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_update_all_reverse.i [2021-11-20 23:14:29,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:14:29,014 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-11-20 23:14:29,086 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:14:29,099 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 [2021-11-20 23:14:29,099 INFO L340 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2021-11-20 23:14:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 79 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:14:29,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:29,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:14:29,145 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:14:29,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:29,152 INFO L85 PathProgramCache]: Analyzing trace with hash 894505749, now seen corresponding path program 1 times [2021-11-20 23:14:29,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:29,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611373548] [2021-11-20 23:14:29,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:29,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:29,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:29,173 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:29,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:14:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:29,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:14:29,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:29,375 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 [2021-11-20 23:14:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:29,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:29,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:29,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611373548] [2021-11-20 23:14:29,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611373548] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:29,450 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:29,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 23:14:29,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530777577] [2021-11-20 23:14:29,454 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:29,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:14:29,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:29,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:14:29,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:14:29,507 INFO L87 Difference]: Start difference. First operand has 83 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 79 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:29,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:29,745 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-11-20 23:14:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:14:29,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 23:14:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:29,768 INFO L225 Difference]: With dead ends: 81 [2021-11-20 23:14:29,768 INFO L226 Difference]: Without dead ends: 78 [2021-11-20 23:14:29,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:14:29,782 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 8 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:29,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 135 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:14:29,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-20 23:14:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-20 23:14:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.653061224489796) internal successors, (81), 74 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-11-20 23:14:29,848 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 6 [2021-11-20 23:14:29,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:29,849 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-11-20 23:14:29,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:29,850 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-11-20 23:14:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:14:29,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:29,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:14:29,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:30,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:30,076 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:14:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:30,077 INFO L85 PathProgramCache]: Analyzing trace with hash 894505750, now seen corresponding path program 1 times [2021-11-20 23:14:30,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:30,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859172201] [2021-11-20 23:14:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:30,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:30,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:30,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:30,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 23:14:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:30,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:14:30,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:30,213 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 [2021-11-20 23:14:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:30,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:30,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:30,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859172201] [2021-11-20 23:14:30,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859172201] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:30,369 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:30,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-20 23:14:30,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888855344] [2021-11-20 23:14:30,372 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:30,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:14:30,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:30,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:14:30,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:30,377 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:30,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:30,642 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-11-20 23:14:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:14:30,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 23:14:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:30,646 INFO L225 Difference]: With dead ends: 76 [2021-11-20 23:14:30,646 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 23:14:30,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:30,648 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:30,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 137 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:14:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 23:14:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-20 23:14:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-11-20 23:14:30,659 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 6 [2021-11-20 23:14:30,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:30,659 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-11-20 23:14:30,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:30,660 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-11-20 23:14:30,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:14:30,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:30,661 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:30,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:30,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:30,876 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:14:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:30,877 INFO L85 PathProgramCache]: Analyzing trace with hash -835957545, now seen corresponding path program 1 times [2021-11-20 23:14:30,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:30,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482991853] [2021-11-20 23:14:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:30,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:30,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:30,881 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:30,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 23:14:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:30,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:14:30,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:31,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:31,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:31,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482991853] [2021-11-20 23:14:31,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482991853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:31,067 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:31,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:14:31,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389703280] [2021-11-20 23:14:31,067 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:31,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:14:31,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:31,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:14:31,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:31,069 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:31,108 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-11-20 23:14:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:14:31,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2021-11-20 23:14:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:31,110 INFO L225 Difference]: With dead ends: 83 [2021-11-20 23:14:31,112 INFO L226 Difference]: Without dead ends: 83 [2021-11-20 23:14:31,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:31,115 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 9 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:31,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 230 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:14:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-20 23:14:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2021-11-20 23:14:31,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.6) internal successors, (80), 73 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2021-11-20 23:14:31,137 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 13 [2021-11-20 23:14:31,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:31,137 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2021-11-20 23:14:31,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2021-11-20 23:14:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:14:31,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:31,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:31,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:31,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:31,367 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:14:31,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:31,367 INFO L85 PathProgramCache]: Analyzing trace with hash -125034980, now seen corresponding path program 1 times [2021-11-20 23:14:31,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:31,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263232141] [2021-11-20 23:14:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:31,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:31,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:31,369 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:31,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 23:14:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:31,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:14:31,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:31,507 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 [2021-11-20 23:14:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:14:31,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:14:31,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:31,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263232141] [2021-11-20 23:14:31,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263232141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:31,782 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:31,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 23:14:31,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505711142] [2021-11-20 23:14:31,783 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:31,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:14:31,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:31,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:14:31,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:14:31,788 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:14:32,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:32,123 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-11-20 23:14:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:14:32,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-11-20 23:14:32,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:32,128 INFO L225 Difference]: With dead ends: 97 [2021-11-20 23:14:32,128 INFO L226 Difference]: Without dead ends: 97 [2021-11-20 23:14:32,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:14:32,130 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 68 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:32,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 227 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:14:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-20 23:14:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2021-11-20 23:14:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.58) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-11-20 23:14:32,152 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 22 [2021-11-20 23:14:32,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:32,153 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-11-20 23:14:32,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:14:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-11-20 23:14:32,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:14:32,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:32,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:32,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-20 23:14:32,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:32,366 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:14:32,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:32,367 INFO L85 PathProgramCache]: Analyzing trace with hash -125034979, now seen corresponding path program 1 times [2021-11-20 23:14:32,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:32,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184392683] [2021-11-20 23:14:32,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:32,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:32,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:32,369 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:32,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 23:14:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:32,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:14:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:32,520 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 [2021-11-20 23:14:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:14:32,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:14:33,210 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184392683] [2021-11-20 23:14:33,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184392683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:33,210 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:33,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-20 23:14:33,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859986068] [2021-11-20 23:14:33,211 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:33,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:14:33,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:33,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:14:33,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:14:33,213 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:14:33,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:33,891 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-11-20 23:14:33,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:14:33,891 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-11-20 23:14:33,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:33,893 INFO L225 Difference]: With dead ends: 76 [2021-11-20 23:14:33,893 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 23:14:33,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:14:33,894 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 69 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:33,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 353 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 23:14:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 23:14:33,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-20 23:14:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.56) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:14:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-11-20 23:14:33,902 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 22 [2021-11-20 23:14:33,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:33,902 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-11-20 23:14:33,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:14:33,903 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-11-20 23:14:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 23:14:33,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:33,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:33,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:34,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:34,113 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:14:34,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:34,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1180454715, now seen corresponding path program 1 times [2021-11-20 23:14:34,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:34,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361433264] [2021-11-20 23:14:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:34,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:34,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:34,115 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:34,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 23:14:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:34,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:14:34,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:34,237 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 [2021-11-20 23:14:34,499 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 23:14:34,499 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 23 treesize of output 30 [2021-11-20 23:14:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:34,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:56,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:56,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361433264] [2021-11-20 23:14:56,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361433264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:14:56,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [358897889] [2021-11-20 23:14:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:56,674 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:14:56,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:14:56,682 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:14:56,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-20 23:14:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:56,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 23:14:56,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:56,869 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 [2021-11-20 23:15:01,055 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 23:15:01,055 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 16 treesize of output 21 [2021-11-20 23:15:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:15:01,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:15:09,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [358897889] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:15:09,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:15:09,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8, 6] total 18 [2021-11-20 23:15:09,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43464783] [2021-11-20 23:15:09,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:09,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:15:09,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:15:09,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:15:09,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=270, Unknown=13, NotChecked=0, Total=342 [2021-11-20 23:15:09,693 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:15:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:12,223 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-11-20 23:15:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:15:12,223 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-20 23:15:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:12,225 INFO L225 Difference]: With dead ends: 94 [2021-11-20 23:15:12,225 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 23:15:12,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=69, Invalid=297, Unknown=14, NotChecked=0, Total=380 [2021-11-20 23:15:12,226 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 64 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:12,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 348 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 20 Unchecked, 0.5s Time] [2021-11-20 23:15:12,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 23:15:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-11-20 23:15:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.54) internal successors, (77), 70 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:15:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-11-20 23:15:12,234 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 25 [2021-11-20 23:15:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:12,234 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-11-20 23:15:12,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:15:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-11-20 23:15:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 23:15:12,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:12,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:12,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:12,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-20 23:15:12,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:15:12,655 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:15:12,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1180454714, now seen corresponding path program 1 times [2021-11-20 23:15:12,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:15:12,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287439616] [2021-11-20 23:15:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:12,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:15:12,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:15:12,659 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:15:12,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 23:15:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:12,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 23:15:12,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:12,827 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 [2021-11-20 23:15:12,837 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 [2021-11-20 23:15:13,236 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:15:13,237 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 26 treesize of output 28 [2021-11-20 23:15:13,254 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:15:13,255 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 25 treesize of output 25 [2021-11-20 23:15:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:13,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:18,470 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|)) (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse0))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|))) (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|)))))))) is different from true [2021-11-20 23:15:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-20 23:15:31,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:15:31,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287439616] [2021-11-20 23:15:31,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287439616] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:15:31,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1479161108] [2021-11-20 23:15:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:31,234 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:15:31,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:15:31,240 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:15:31,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-20 23:15:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:31,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 23:15:31,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:31,441 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 [2021-11-20 23:15:31,450 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 [2021-11-20 23:15:31,763 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:15:31,764 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 28 treesize of output 30 [2021-11-20 23:15:31,779 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:15:31,779 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 27 treesize of output 27 [2021-11-20 23:15:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:31,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:48,820 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_57| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_57| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_57|))))) is different from false [2021-11-20 23:15:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:49,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1479161108] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:15:49,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448889502] [2021-11-20 23:15:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:49,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:49,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:49,303 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:15:49,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 23:15:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:49,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 23:15:49,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:49,374 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 [2021-11-20 23:15:49,732 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:15:49,733 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 32 treesize of output 34 [2021-11-20 23:15:49,744 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:15:49,744 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 31 treesize of output 31 [2021-11-20 23:15:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:49,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:12,184 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_65| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse0) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_65| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_65|))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|))))))))) is different from false [2021-11-20 23:16:12,660 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:16:12,660 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 34 treesize of output 33 [2021-11-20 23:16:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:15,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448889502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:15,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:16:15,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 21 [2021-11-20 23:16:15,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51977408] [2021-11-20 23:16:15,155 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:15,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 23:16:15,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:16:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 23:16:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=284, Unknown=14, NotChecked=108, Total=462 [2021-11-20 23:16:15,158 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 16 states have internal predecessors, (58), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:16:27,697 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_57| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_57| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_57|))))) (= |c_#length| |c_old(#length)|) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_65| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (or (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse2) (bvule .cse2 (select (store |c_#length| |v_node_create_~temp~0#1.base_65| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_65|))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse3)) (not (bvule .cse3 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))))))))) is different from false [2021-11-20 23:16:29,714 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_57| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_57| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_57|))))) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_49| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse2) (bvule .cse2 (select (store |c_#length| |v_node_create_~temp~0#1.base_49| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_49|))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse3 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|))) (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse3)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|)))))))) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_65| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (or (let ((.cse4 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse4) (bvule .cse4 (select (store |c_#length| |v_node_create_~temp~0#1.base_65| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_65|))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse5 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse5)) (not (bvule .cse5 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))))))))) is different from false [2021-11-20 23:16:31,751 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |c_node_create_~temp~0#1.base|)))) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|)) (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse0))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|))) (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|)))))))) (= |c_node_create_~temp~0#1.offset| (_ bv0 32)) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse2)) (not (bvule .cse2 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse3) (bvule .cse3 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|)))))) (= (_ bv8 32) (select |c_#length| |c_node_create_~temp~0#1.base|))) is different from false [2021-11-20 23:16:33,835 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|)) (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse0))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|))) (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|)))))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |c_node_create_#res#1.base|)) (_ bv1 1))) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse2)) (not (bvule .cse2 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse3) (bvule .cse3 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|)))))) (= |c_node_create_#res#1.offset| (_ bv0 32)) (= (_ bv8 32) (select |c_#length| |c_node_create_#res#1.base|))) is different from false [2021-11-20 23:16:34,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:34,015 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2021-11-20 23:16:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 23:16:34,016 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 16 states have internal predecessors, (58), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2021-11-20 23:16:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:34,018 INFO L225 Difference]: With dead ends: 102 [2021-11-20 23:16:34,018 INFO L226 Difference]: Without dead ends: 102 [2021-11-20 23:16:34,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 69.4s TimeCoverageRelationStatistics Valid=80, Invalid=347, Unknown=21, NotChecked=308, Total=756 [2021-11-20 23:16:34,019 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 7 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:34,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 672 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 401 Unchecked, 0.3s Time] [2021-11-20 23:16:34,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-20 23:16:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-11-20 23:16:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 71 states have (on average 1.408450704225352) internal successors, (100), 91 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:16:34,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2021-11-20 23:16:34,028 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 25 [2021-11-20 23:16:34,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:34,028 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2021-11-20 23:16:34,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 16 states have internal predecessors, (58), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:16:34,029 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2021-11-20 23:16:34,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 23:16:34,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:34,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:34,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:34,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:34,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:34,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:34,650 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:16:34,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:34,651 INFO L85 PathProgramCache]: Analyzing trace with hash 2031866825, now seen corresponding path program 1 times [2021-11-20 23:16:34,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:16:34,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58774686] [2021-11-20 23:16:34,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:34,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:16:34,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:16:34,652 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:16:34,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 23:16:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:34,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:16:34,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:16:34,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:16:34,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:16:34,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58774686] [2021-11-20 23:16:34,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58774686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:34,998 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:34,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 23:16:34,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613044978] [2021-11-20 23:16:34,998 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:34,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:16:34,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:16:34,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:16:34,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:16:34,999 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:16:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:35,124 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2021-11-20 23:16:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:16:35,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-11-20 23:16:35,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:35,127 INFO L225 Difference]: With dead ends: 130 [2021-11-20 23:16:35,128 INFO L226 Difference]: Without dead ends: 130 [2021-11-20 23:16:35,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:16:35,129 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 248 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:35,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 222 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-20 23:16:35,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2021-11-20 23:16:35,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.3918918918918919) internal successors, (103), 94 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:16:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2021-11-20 23:16:35,139 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 30 [2021-11-20 23:16:35,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:35,140 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2021-11-20 23:16:35,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:16:35,140 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2021-11-20 23:16:35,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 23:16:35,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:35,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:35,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:35,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:16:35,354 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:16:35,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:35,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2031866881, now seen corresponding path program 1 times [2021-11-20 23:16:35,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:16:35,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855566784] [2021-11-20 23:16:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:35,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:16:35,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:16:35,357 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:16:35,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 23:16:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:35,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 23:16:35,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:35,485 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 [2021-11-20 23:16:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:16:35,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:16:36,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:16:36,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855566784] [2021-11-20 23:16:36,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855566784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:36,903 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:36,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 17 [2021-11-20 23:16:36,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136121468] [2021-11-20 23:16:36,903 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:36,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 23:16:36,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:16:36,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 23:16:36,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-20 23:16:36,904 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:16:39,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:39,138 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2021-11-20 23:16:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:16:39,140 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-11-20 23:16:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:39,142 INFO L225 Difference]: With dead ends: 154 [2021-11-20 23:16:39,142 INFO L226 Difference]: Without dead ends: 154 [2021-11-20 23:16:39,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-11-20 23:16:39,143 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 493 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:39,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 615 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 23:16:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-20 23:16:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 105. [2021-11-20 23:16:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.4155844155844155) internal successors, (109), 97 states have internal predecessors, (109), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:16:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-11-20 23:16:39,154 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 30 [2021-11-20 23:16:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:39,154 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-11-20 23:16:39,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:16:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-11-20 23:16:39,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 23:16:39,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:39,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:39,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:39,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:16:39,370 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:16:39,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:39,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2031866880, now seen corresponding path program 1 times [2021-11-20 23:16:39,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:16:39,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013899287] [2021-11-20 23:16:39,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:39,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:16:39,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:16:39,373 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:16:39,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 23:16:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:39,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:16:39,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:39,526 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 [2021-11-20 23:16:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:16:39,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:16:39,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:16:39,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013899287] [2021-11-20 23:16:39,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013899287] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:39,895 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:39,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 9 [2021-11-20 23:16:39,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322690580] [2021-11-20 23:16:39,896 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:39,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:16:39,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:16:39,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:16:39,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:16:39,897 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:16:40,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:40,783 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2021-11-20 23:16:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:16:40,783 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-11-20 23:16:40,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:40,785 INFO L225 Difference]: With dead ends: 125 [2021-11-20 23:16:40,785 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 23:16:40,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:16:40,786 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 294 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:40,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 293 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 23:16:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 23:16:40,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 105. [2021-11-20 23:16:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 97 states have internal predecessors, (107), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:16:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2021-11-20 23:16:40,802 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 30 [2021-11-20 23:16:40,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:40,803 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2021-11-20 23:16:40,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:16:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2021-11-20 23:16:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 23:16:40,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:40,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:40,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:41,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:16:41,020 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:16:41,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:41,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1922829059, now seen corresponding path program 1 times [2021-11-20 23:16:41,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:16:41,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299185252] [2021-11-20 23:16:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:41,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:16:41,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:16:41,022 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:16:41,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 23:16:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:41,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 23:16:41,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:41,191 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 [2021-11-20 23:16:41,397 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:16:41,397 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 20 treesize of output 20 [2021-11-20 23:16:41,476 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 11 treesize of output 7 [2021-11-20 23:16:41,623 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:16:41,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2021-11-20 23:16:42,003 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:16:42,003 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 41 treesize of output 24 [2021-11-20 23:16:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:42,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:42,519 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-11-20 23:16:42,519 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 32 treesize of output 31 [2021-11-20 23:17:08,158 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))) is different from false [2021-11-20 23:17:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:17:10,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:17:10,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299185252] [2021-11-20 23:17:10,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299185252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:17:10,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1209194424] [2021-11-20 23:17:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:10,680 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:17:10,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:17:10,691 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:17:10,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-20 23:17:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:10,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 23:17:10,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:10,921 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 [2021-11-20 23:17:11,334 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 23:17:11,334 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 26 treesize of output 33 [2021-11-20 23:17:11,621 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 11 treesize of output 7 [2021-11-20 23:17:11,992 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:17:11,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2021-11-20 23:17:12,847 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:17:12,848 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 60 treesize of output 43 [2021-11-20 23:17:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:17:13,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:51,272 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))))))))) (_ bv1 1)))) is different from false [2021-11-20 23:18:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:18:54,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1209194424] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:18:54,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466022144] [2021-11-20 23:18:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:54,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:18:54,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:18:54,382 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:18:54,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 23:18:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:54,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 23:18:54,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:18:54,582 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:18:54,583 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 17 treesize of output 17 [2021-11-20 23:18:54,607 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 11 treesize of output 7 [2021-11-20 23:18:54,657 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:18:54,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2021-11-20 23:18:54,734 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:18:54,734 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 41 treesize of output 24 [2021-11-20 23:18:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:18:54,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:18:54,966 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-11-20 23:18:54,967 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 32 treesize of output 31 [2021-11-20 23:18:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:18:59,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466022144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:18:59,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:18:59,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 18, 18, 18, 13] total 52 [2021-11-20 23:18:59,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748227548] [2021-11-20 23:18:59,828 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:18:59,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-20 23:18:59,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:18:59,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-20 23:18:59,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2311, Unknown=52, NotChecked=198, Total=2756 [2021-11-20 23:18:59,832 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 53 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 44 states have internal predecessors, (93), 4 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 23:19:14,488 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:19:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:14,833 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2021-11-20 23:19:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 23:19:14,834 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 44 states have internal predecessors, (93), 4 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 33 [2021-11-20 23:19:14,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:14,836 INFO L225 Difference]: With dead ends: 132 [2021-11-20 23:19:14,836 INFO L226 Difference]: Without dead ends: 132 [2021-11-20 23:19:14,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 133 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 149.4s TimeCoverageRelationStatistics Valid=288, Invalid=3087, Unknown=55, NotChecked=230, Total=3660 [2021-11-20 23:19:14,839 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 42 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 634 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:14,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 1517 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 384 Invalid, 0 Unknown, 634 Unchecked, 1.0s Time] [2021-11-20 23:19:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-20 23:19:14,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 120. [2021-11-20 23:19:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 91 states have (on average 1.3516483516483517) internal successors, (123), 111 states have internal predecessors, (123), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:19:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 131 transitions. [2021-11-20 23:19:14,848 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 131 transitions. Word has length 33 [2021-11-20 23:19:14,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:14,848 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 131 transitions. [2021-11-20 23:19:14,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 44 states have internal predecessors, (93), 4 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 23:19:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 131 transitions. [2021-11-20 23:19:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 23:19:14,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:14,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:14,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 23:19:15,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-20 23:19:15,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-20 23:19:15,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:19:15,459 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:19:15,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:15,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1922829058, now seen corresponding path program 1 times [2021-11-20 23:19:15,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:19:15,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465516738] [2021-11-20 23:19:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:15,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:19:15,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:19:15,461 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:19:15,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 23:19:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:15,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 23:19:15,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:19:15,626 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 [2021-11-20 23:19:15,635 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 [2021-11-20 23:19:16,016 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:19:16,016 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 16 treesize of output 16 [2021-11-20 23:19:16,039 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 14 [2021-11-20 23:19:16,234 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 11 treesize of output 7 [2021-11-20 23:19:16,257 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 11 treesize of output 7 [2021-11-20 23:19:16,500 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:19:16,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-11-20 23:19:16,533 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 23:19:16,533 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 55 treesize of output 50 [2021-11-20 23:19:17,132 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:19:17,132 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 66 treesize of output 45 [2021-11-20 23:19:17,141 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:19:17,141 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 37 treesize of output 24 [2021-11-20 23:19:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:19:17,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:19:42,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:19:42,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:20:37,558 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (and (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| |c_node_create_~temp~0#1.base|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse0) (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|)))) (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|)))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (or (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|))))))))) is different from false [2021-11-20 23:20:43,146 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_115| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_115|)))) (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_115| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse0) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| |v_node_create_~temp~0#1.base_115|)))) (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|)))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (or (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|))))))))) is different from false [2021-11-20 23:20:45,163 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_115| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_115|)))) (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_115| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse0) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| |v_node_create_~temp~0#1.base_115|)))) (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|)))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (or (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|))))))))) is different from true [2021-11-20 23:20:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-20 23:20:55,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:20:55,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465516738] [2021-11-20 23:20:55,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465516738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:20:55,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [110927743] [2021-11-20 23:20:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:55,368 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:20:55,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:20:55,370 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:20:55,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-20 23:20:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:55,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 23:20:55,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:20:55,579 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 [2021-11-20 23:20:55,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 23:20:56,235 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:20:56,235 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 [2021-11-20 23:20:56,265 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:20:56,265 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 16 treesize of output 16 [2021-11-20 23:20:56,674 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 11 treesize of output 7 [2021-11-20 23:20:56,686 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 11 treesize of output 7 [2021-11-20 23:20:57,184 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:20:57,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-11-20 23:20:57,209 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 23:20:57,210 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 55 treesize of output 50 [2021-11-20 23:20:58,373 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:20:58,373 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 66 treesize of output 45 [2021-11-20 23:20:58,380 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:20:58,380 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 36 treesize of output 24 [2021-11-20 23:20:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:20:58,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:22:01,568 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_62| (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_62| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_10|))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .cse0)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_62|))))) (let ((.cse1 (bvadd |c_node_create_~temp~0#1.offset| (_ bv8 32))) (.cse2 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4|))) (and (bvule .cse1 (select |c_#length| |c_node_create_~temp~0#1.base|)) (bvule .cse2 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_10|)) (bvule (bvadd (_ bv4 32) |c_node_create_~temp~0#1.offset|) .cse1) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .cse2))))) is different from true [2021-11-20 23:23:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-20 23:23:01,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [110927743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:23:01,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172136967] [2021-11-20 23:23:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:23:01,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:23:01,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:23:01,797 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:23:01,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 23:23:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:23:01,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 23:23:01,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:23:01,880 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 [2021-11-20 23:23:04,312 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:23:04,313 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 16 treesize of output 16 [2021-11-20 23:23:04,325 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 14 [2021-11-20 23:23:04,366 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 11 treesize of output 7 [2021-11-20 23:23:04,374 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 11 treesize of output 7 [2021-11-20 23:23:04,469 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:23:04,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-11-20 23:23:04,493 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 23:23:04,493 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 55 treesize of output 50 [2021-11-20 23:23:04,671 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:23:04,671 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 66 treesize of output 45 [2021-11-20 23:23:04,681 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:23:04,681 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 37 treesize of output 24 [2021-11-20 23:23:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:23:04,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:23:05,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:23:05,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:23:09,999 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|))) (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (and (bvule .cse1 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse1) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |c_node_create_#res#1.base|)))))) is different from false [2021-11-20 23:23:12,985 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|))) (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (and (bvule .cse1 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse1) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |c_node_create_~temp~0#1.base|)))))) is different from false [2021-11-20 23:23:17,828 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_131| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|))) (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (and (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse1) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_node_create_~temp~0#1.base_131|)) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_131| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_131|))))) is different from false [2021-11-20 23:23:19,847 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_131| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|))) (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (and (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse1) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_node_create_~temp~0#1.base_131|)) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_131| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_131|))))) is different from true [2021-11-20 23:23:20,300 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:23:20,300 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 39 treesize of output 38 [2021-11-20 23:23:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-20 23:23:27,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172136967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:23:27,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:23:27,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 19, 19] total 59 [2021-11-20 23:23:27,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246042600] [2021-11-20 23:23:27,167 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:23:27,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-20 23:23:27,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:23:27,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-20 23:23:27,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2624, Unknown=75, NotChecked=654, Total=3540 [2021-11-20 23:23:27,171 INFO L87 Difference]: Start difference. First operand 120 states and 131 transitions. Second operand has 60 states, 59 states have (on average 1.694915254237288) internal successors, (100), 49 states have internal predecessors, (100), 4 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 23:23:54,903 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (= |c_#length| |c_old(#length)|) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_131| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|))) (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (and (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse1) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_node_create_~temp~0#1.base_131|)) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_131| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_131|))))) (forall ((|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_115| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_115|)))) (let ((.cse2 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse2 (select (store |c_#length| |v_node_create_~temp~0#1.base_115| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse2) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| |v_node_create_~temp~0#1.base_115|)))) (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|)))) (let ((.cse3 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (or (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse3)) (not (bvule .cse3 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|)))))))))) is different from false [2021-11-20 23:23:56,916 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |c_node_create_~temp~0#1.base|)))) (forall ((|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_62| (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_62| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_10|))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .cse0)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_62|))))) (let ((.cse1 (bvadd |c_node_create_~temp~0#1.offset| (_ bv8 32))) (.cse2 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4|))) (and (bvule .cse1 (select |c_#length| |c_node_create_~temp~0#1.base|)) (bvule .cse2 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_10|)) (bvule (bvadd (_ bv4 32) |c_node_create_~temp~0#1.offset|) .cse1) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .cse2))))) (= |c_node_create_~temp~0#1.offset| (_ bv0 32)) (= (_ bv0 1) (select |c_old(#valid)| |c_node_create_~temp~0#1.base|)) (= (store |c_old(#length)| |c_node_create_~temp~0#1.base| (_ bv8 32)) |c_#length|) (forall ((|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| (_ BitVec 32))) (or (let ((.cse3 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (and (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| |c_node_create_~temp~0#1.base|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse3) (bvule .cse3 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|)))) (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|)))) (let ((.cse4 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (or (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_18| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse4)) (not (bvule .cse4 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_8|))))))))) (= (_ bv8 32) (select |c_#length| |c_node_create_~temp~0#1.base|)) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ BitVec 32))) (and (let ((.cse5 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse5)) (not (bvule .cse5 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|))) (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|))))) (let ((.cse6 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (and (bvule .cse6 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse6) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |c_node_create_~temp~0#1.base|))))))) is different from false [2021-11-20 23:23:58,950 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |c_node_create_#res#1.base|))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |c_node_create_#res#1.base|)) (_ bv1 1))) (= |c_node_create_#res#1.offset| (_ bv0 32)) (= (store |c_old(#length)| |c_node_create_#res#1.base| (_ bv8 32)) |c_#length|) (= (_ bv8 32) (select |c_#length| |c_node_create_#res#1.base|)) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|))) (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_circular_create_#t~ret5#1.base_58|))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (and (bvule .cse1 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_12|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse1) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_22| |c_node_create_#res#1.base|))))))) is different from false [2021-11-20 23:24:28,256 WARN L227 SmtUtils]: Spent 16.33s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:24:31,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:31,264 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2021-11-20 23:24:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 23:24:31,265 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.694915254237288) internal successors, (100), 49 states have internal predecessors, (100), 4 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 33 [2021-11-20 23:24:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:31,266 INFO L225 Difference]: With dead ends: 132 [2021-11-20 23:24:31,267 INFO L226 Difference]: Without dead ends: 132 [2021-11-20 23:24:31,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 293.5s TimeCoverageRelationStatistics Valid=279, Invalid=3451, Unknown=88, NotChecked=1152, Total=4970 [2021-11-20 23:24:31,270 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 40 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1061 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:31,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 1893 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 490 Invalid, 0 Unknown, 1061 Unchecked, 1.9s Time] [2021-11-20 23:24:31,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-20 23:24:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 119. [2021-11-20 23:24:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 90 states have (on average 1.3444444444444446) internal successors, (121), 110 states have internal predecessors, (121), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:24:31,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2021-11-20 23:24:31,276 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 33 [2021-11-20 23:24:31,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:31,276 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2021-11-20 23:24:31,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.694915254237288) internal successors, (100), 49 states have internal predecessors, (100), 4 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 23:24:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2021-11-20 23:24:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 23:24:31,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:31,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:31,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:31,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-20 23:24:31,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-20 23:24:31,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:24:31,886 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:31,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:31,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1922829003, now seen corresponding path program 1 times [2021-11-20 23:24:31,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:31,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594667946] [2021-11-20 23:24:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:31,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:31,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:31,888 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:31,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 23:24:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:31,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:24:31,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:24:32,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:24:32,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:24:32,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594667946] [2021-11-20 23:24:32,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594667946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:32,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1715462746] [2021-11-20 23:24:32,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:32,299 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:24:32,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:24:32,300 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:24:32,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-20 23:24:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:32,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:24:32,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:24:32,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:24:32,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1715462746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:32,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725339472] [2021-11-20 23:24:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:32,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:24:32,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:24:32,620 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:24:32,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 23:24:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:32,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:24:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:24:32,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:24:32,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725339472] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:32,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:24:32,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-20 23:24:32,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600651581] [2021-11-20 23:24:32,887 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:24:32,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:24:32,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:24:32,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:24:32,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:24:32,888 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:24:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:33,403 INFO L93 Difference]: Finished difference Result 395 states and 426 transitions. [2021-11-20 23:24:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 23:24:33,404 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2021-11-20 23:24:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:33,406 INFO L225 Difference]: With dead ends: 395 [2021-11-20 23:24:33,407 INFO L226 Difference]: Without dead ends: 395 [2021-11-20 23:24:33,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:24:33,408 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 1229 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1229 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:33,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1229 Valid, 394 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:24:33,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-20 23:24:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 131. [2021-11-20 23:24:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 102 states have (on average 1.3333333333333333) internal successors, (136), 122 states have internal predecessors, (136), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:24:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2021-11-20 23:24:33,416 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 33 [2021-11-20 23:24:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:33,416 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2021-11-20 23:24:33,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:24:33,416 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2021-11-20 23:24:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 23:24:33,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:33,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:33,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:33,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:33,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-20 23:24:34,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:24:34,033 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:34,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:34,034 INFO L85 PathProgramCache]: Analyzing trace with hash 999795886, now seen corresponding path program 1 times [2021-11-20 23:24:34,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:34,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946498320] [2021-11-20 23:24:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:34,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:34,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:34,035 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:34,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 23:24:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:34,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:24:34,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:34,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:34,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:24:34,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946498320] [2021-11-20 23:24:34,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946498320] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:34,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [189894629] [2021-11-20 23:24:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:34,530 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:24:34,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:24:34,531 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:24:34,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-20 23:24:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:34,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:24:34,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:34,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:34,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [189894629] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:34,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773019550] [2021-11-20 23:24:34,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:34,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:24:34,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:24:34,969 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:24:34,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 23:24:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:35,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:24:35,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 23:24:35,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 23:24:35,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773019550] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:24:35,740 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-20 23:24:35,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5, 5, 5] total 16 [2021-11-20 23:24:35,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42534988] [2021-11-20 23:24:35,740 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:24:35,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:24:35,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:24:35,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:24:35,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:24:35,741 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:24:36,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:36,617 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2021-11-20 23:24:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:24:36,618 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-11-20 23:24:36,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:36,619 INFO L225 Difference]: With dead ends: 156 [2021-11-20 23:24:36,620 INFO L226 Difference]: Without dead ends: 156 [2021-11-20 23:24:36,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 214 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:24:36,621 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 290 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:36,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 290 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 23:24:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-20 23:24:36,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2021-11-20 23:24:36,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 105 states have (on average 1.3523809523809525) internal successors, (142), 125 states have internal predecessors, (142), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:24:36,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2021-11-20 23:24:36,628 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 40 [2021-11-20 23:24:36,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:36,629 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2021-11-20 23:24:36,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:24:36,629 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2021-11-20 23:24:36,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 23:24:36,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:36,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:36,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-20 23:24:36,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:37,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-20 23:24:37,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:24:37,234 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:37,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:37,234 INFO L85 PathProgramCache]: Analyzing trace with hash 999795887, now seen corresponding path program 1 times [2021-11-20 23:24:37,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:37,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126938584] [2021-11-20 23:24:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:37,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:37,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:37,236 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:37,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 23:24:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:37,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:24:37,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:37,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:37,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:24:37,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126938584] [2021-11-20 23:24:37,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126938584] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:37,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [829014427] [2021-11-20 23:24:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:37,669 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:24:37,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:24:37,670 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:24:37,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-20 23:24:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:37,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:24:37,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:37,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:38,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [829014427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690492122] [2021-11-20 23:24:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:38,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:24:38,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:24:38,069 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:24:38,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 23:24:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:38,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:24:38,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:38,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:38,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690492122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:38,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:24:38,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 10 [2021-11-20 23:24:38,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626526867] [2021-11-20 23:24:38,549 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:24:38,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:24:38,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:24:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:24:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:24:38,551 INFO L87 Difference]: Start difference. First operand 134 states and 150 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:24:38,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:38,768 INFO L93 Difference]: Finished difference Result 211 states and 240 transitions. [2021-11-20 23:24:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:24:38,769 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-11-20 23:24:38,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:38,770 INFO L225 Difference]: With dead ends: 211 [2021-11-20 23:24:38,771 INFO L226 Difference]: Without dead ends: 211 [2021-11-20 23:24:38,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:24:38,772 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 479 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:38,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 317 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:24:38,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-20 23:24:38,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 185. [2021-11-20 23:24:38,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 156 states have (on average 1.4679487179487178) internal successors, (229), 176 states have internal predecessors, (229), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:24:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 237 transitions. [2021-11-20 23:24:38,781 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 237 transitions. Word has length 40 [2021-11-20 23:24:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:38,781 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 237 transitions. [2021-11-20 23:24:38,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:24:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 237 transitions. [2021-11-20 23:24:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 23:24:38,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:38,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:38,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:38,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:39,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-20 23:24:39,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:24:39,394 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:39,395 INFO L85 PathProgramCache]: Analyzing trace with hash 968760597, now seen corresponding path program 1 times [2021-11-20 23:24:39,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:39,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348905402] [2021-11-20 23:24:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:39,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:39,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:39,396 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:39,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 23:24:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:39,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:24:39,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:39,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:39,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:24:39,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348905402] [2021-11-20 23:24:39,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348905402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:39,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1912194186] [2021-11-20 23:24:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:39,878 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:24:39,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:24:39,879 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:24:39,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-20 23:24:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:40,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:24:40,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:40,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:40,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1912194186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:40,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986298492] [2021-11-20 23:24:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:40,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:24:40,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:24:40,343 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:24:40,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 23:24:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:40,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:24:40,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:40,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:24:41,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986298492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:41,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:24:41,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 8] total 16 [2021-11-20 23:24:41,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654964417] [2021-11-20 23:24:41,093 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:24:41,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 23:24:41,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:24:41,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 23:24:41,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:24:41,094 INFO L87 Difference]: Start difference. First operand 185 states and 237 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:24:41,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:41,426 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2021-11-20 23:24:41,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:24:41,427 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-11-20 23:24:41,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:41,428 INFO L225 Difference]: With dead ends: 175 [2021-11-20 23:24:41,428 INFO L226 Difference]: Without dead ends: 175 [2021-11-20 23:24:41,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:24:41,430 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 427 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:41,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 461 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:24:41,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-20 23:24:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 169. [2021-11-20 23:24:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 142 states have (on average 1.408450704225352) internal successors, (200), 160 states have internal predecessors, (200), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:24:41,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 208 transitions. [2021-11-20 23:24:41,438 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 208 transitions. Word has length 41 [2021-11-20 23:24:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:41,438 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 208 transitions. [2021-11-20 23:24:41,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:24:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 208 transitions. [2021-11-20 23:24:41,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 23:24:41,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:41,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:41,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:41,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:41,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:42,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:24:42,043 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:42,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:42,044 INFO L85 PathProgramCache]: Analyzing trace with hash 884092027, now seen corresponding path program 2 times [2021-11-20 23:24:42,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:42,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609236457] [2021-11-20 23:24:42,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:24:42,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:42,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:42,045 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:42,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-20 23:24:42,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 23:24:42,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:24:42,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 23:24:42,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:42,133 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 [2021-11-20 23:24:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:24:42,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:24:43,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:24:43,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609236457] [2021-11-20 23:24:43,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609236457] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:24:43,887 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:24:43,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 17 [2021-11-20 23:24:43,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714017270] [2021-11-20 23:24:43,887 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:24:43,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 23:24:43,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:24:43,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 23:24:43,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-20 23:24:43,889 INFO L87 Difference]: Start difference. First operand 169 states and 208 transitions. Second operand has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:24:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:45,618 INFO L93 Difference]: Finished difference Result 221 states and 258 transitions. [2021-11-20 23:24:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:24:45,620 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-20 23:24:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:45,621 INFO L225 Difference]: With dead ends: 221 [2021-11-20 23:24:45,621 INFO L226 Difference]: Without dead ends: 221 [2021-11-20 23:24:45,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-11-20 23:24:45,623 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 743 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:45,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 375 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 23:24:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-20 23:24:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 169. [2021-11-20 23:24:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 142 states have (on average 1.352112676056338) internal successors, (192), 160 states have internal predecessors, (192), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:24:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2021-11-20 23:24:45,631 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 45 [2021-11-20 23:24:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:45,631 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2021-11-20 23:24:45,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:24:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2021-11-20 23:24:45,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 23:24:45,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:45,633 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:45,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:45,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:24:45,842 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:45,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash -585852510, now seen corresponding path program 2 times [2021-11-20 23:24:45,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:45,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610191381] [2021-11-20 23:24:45,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:24:45,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:45,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:45,843 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:45,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-20 23:24:45,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:24:45,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:24:45,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:24:45,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:24:46,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 23:24:46,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:24:46,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610191381] [2021-11-20 23:24:46,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610191381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:46,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1006847309] [2021-11-20 23:24:46,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:24:46,255 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:24:46,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:24:46,258 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:24:46,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-20 23:24:46,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:24:46,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:24:46,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:24:46,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:24:46,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 23:24:46,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1006847309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:46,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459509144] [2021-11-20 23:24:46,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:24:46,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:24:46,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:24:46,668 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:24:46,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 23:24:46,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:24:46,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:24:46,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:24:46,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:24:46,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 23:24:47,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459509144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:47,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:24:47,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-20 23:24:47,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781545184] [2021-11-20 23:24:47,036 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:24:47,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:24:47,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:24:47,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:24:47,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:24:47,037 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:24:47,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:47,057 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2021-11-20 23:24:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:24:47,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2021-11-20 23:24:47,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:47,058 INFO L225 Difference]: With dead ends: 133 [2021-11-20 23:24:47,058 INFO L226 Difference]: Without dead ends: 133 [2021-11-20 23:24:47,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:24:47,059 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 116 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:47,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 159 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:24:47,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-20 23:24:47,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-20 23:24:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 113 states have (on average 1.3893805309734513) internal successors, (157), 128 states have internal predecessors, (157), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:24:47,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 161 transitions. [2021-11-20 23:24:47,065 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 161 transitions. Word has length 49 [2021-11-20 23:24:47,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:47,066 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 161 transitions. [2021-11-20 23:24:47,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:24:47,066 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 161 transitions. [2021-11-20 23:24:47,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 23:24:47,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:47,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:47,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:47,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-20 23:24:47,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:47,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:24:47,678 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:47,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1246140989, now seen corresponding path program 1 times [2021-11-20 23:24:47,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:47,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099350932] [2021-11-20 23:24:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:47,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:47,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:47,681 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:47,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-20 23:24:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:47,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:24:47,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:24:47,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:24:48,275 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:24:48,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099350932] [2021-11-20 23:24:48,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099350932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:48,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1800104854] [2021-11-20 23:24:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:48,276 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:24:48,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:24:48,277 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:24:48,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-20 23:24:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:48,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:24:48,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:24:48,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:24:48,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1800104854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:48,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839509717] [2021-11-20 23:24:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:48,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:24:48,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:24:48,803 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:24:48,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-20 23:24:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:48,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:24:48,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:24:49,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:24:49,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839509717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:24:49,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:24:49,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-20 23:24:49,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351771167] [2021-11-20 23:24:49,216 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:24:49,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:24:49,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:24:49,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:24:49,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:24:49,218 INFO L87 Difference]: Start difference. First operand 133 states and 161 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:24:49,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:49,617 INFO L93 Difference]: Finished difference Result 197 states and 215 transitions. [2021-11-20 23:24:49,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 23:24:49,618 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-11-20 23:24:49,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:49,619 INFO L225 Difference]: With dead ends: 197 [2021-11-20 23:24:49,619 INFO L226 Difference]: Without dead ends: 197 [2021-11-20 23:24:49,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:24:49,621 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 398 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:49,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 481 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:24:49,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-20 23:24:49,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 130. [2021-11-20 23:24:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 110 states have (on average 1.3363636363636364) internal successors, (147), 125 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:24:49,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 151 transitions. [2021-11-20 23:24:49,627 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 151 transitions. Word has length 48 [2021-11-20 23:24:49,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:49,628 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 151 transitions. [2021-11-20 23:24:49,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:24:49,628 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 151 transitions. [2021-11-20 23:24:49,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 23:24:49,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:49,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:49,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-20 23:24:49,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2021-11-20 23:24:50,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:50,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:24:50,254 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-20 23:24:50,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:50,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1246140934, now seen corresponding path program 1 times [2021-11-20 23:24:50,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:24:50,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895390225] [2021-11-20 23:24:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:50,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:24:50,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:24:50,256 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:24:50,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-20 23:24:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:50,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 23:24:50,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:24:50,462 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 [2021-11-20 23:24:50,703 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:24:50,703 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 19 treesize of output 19 [2021-11-20 23:24:50,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:24:50,982 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:24:50,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-20 23:24:52,639 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-11-20 23:24:52,640 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 55 [2021-11-20 23:24:52,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:24:52,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-20 23:24:53,059 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 29 treesize of output 17 [2021-11-20 23:24:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 23:24:53,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:25:15,151 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_67| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_67|) v_DerPreprocessor_2))) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))))))))) (_ bv1 1)))) is different from false [2021-11-20 23:25:31,813 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_67| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_#res#1.base|) |c_ULTIMATE.start_sll_circular_create_#res#1.offset|))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_67|) v_DerPreprocessor_2))) |c_ULTIMATE.start_sll_circular_create_#res#1.base|) |c_ULTIMATE.start_sll_circular_create_#res#1.offset|))))))))))))) (_ bv1 1)))) is different from false [2021-11-20 23:25:33,826 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_67| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_67|) v_DerPreprocessor_2))) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))))))))))) (_ bv1 1)))) is different from false [2021-11-20 23:25:33,866 INFO L354 Elim1Store]: treesize reduction 5, result has 91.9 percent of original size [2021-11-20 23:25:33,866 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 83 treesize of output 82 [2021-11-20 23:25:35,883 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_67| (_ BitVec 32)) (|ULTIMATE.start_sll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (store .cse0 .cse1 (store (select .cse0 .cse1) (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_67|) v_DerPreprocessor_2)))) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|)) is different from false [2021-11-20 23:25:37,913 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_67| (_ BitVec 32)) (|ULTIMATE.start_sll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))) (store .cse0 .cse1 (store (select .cse0 .cse1) (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_67|) v_DerPreprocessor_2)))) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))) is different from false [2021-11-20 23:25:41,358 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_272| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_14| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_271| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_271|))))) (or (= |v_node_create_~temp~0#1.base_271| |v_node_create_~temp~0#1.base_272|) (not (= |v_node_create_~temp~0#1.base_272| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_14|))))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_272|))))) is different from false [2021-11-20 23:25:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2021-11-20 23:25:41,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:25:41,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895390225] [2021-11-20 23:25:41,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895390225] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:25:41,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [114171564] [2021-11-20 23:25:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:25:41,480 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:25:41,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:25:41,481 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:25:41,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-20 23:25:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:25:41,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 23:25:41,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:25:41,752 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 [2021-11-20 23:25:42,275 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 23:25:42,275 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 26 treesize of output 33 [2021-11-20 23:25:42,640 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 11 treesize of output 7 [2021-11-20 23:25:43,140 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:25:43,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2021-11-20 23:25:45,405 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-11-20 23:25:45,405 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 61 [2021-11-20 23:25:45,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:25:45,852 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 50 treesize of output 30 [2021-11-20 23:25:46,267 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 49 treesize of output 37 [2021-11-20 23:25:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 23:25:46,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:26:24,150 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_71| (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_71|) v_DerPreprocessor_2))) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))))))) (_ bv1 1)))) is different from false [2021-11-20 23:26:26,168 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_71| (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_#res#1.base|) |c_ULTIMATE.start_sll_circular_create_#res#1.offset|))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_71|) v_DerPreprocessor_2))) |c_ULTIMATE.start_sll_circular_create_#res#1.base|) |c_ULTIMATE.start_sll_circular_create_#res#1.offset|))))))))))) (_ bv1 1)))) is different from false [2021-11-20 23:26:28,182 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_71| (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_71|) v_DerPreprocessor_2))) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))))))))) (_ bv1 1)))) is different from false [2021-11-20 23:26:30,201 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_71| (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (|ULTIMATE.start_sll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (store .cse0 .cse1 (store (select .cse0 .cse1) (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_71|) v_DerPreprocessor_2)))) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))))))))))))))) is different from false [2021-11-20 23:26:32,243 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_71| (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (|ULTIMATE.start_sll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))) (store .cse0 .cse1 (store (select .cse0 .cse1) (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_71|) v_DerPreprocessor_2)))) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))))))))))))))) (_ bv1 1)))) is different from false [2021-11-20 23:26:46,982 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_16| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_26| (_ BitVec 32))) (or (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_16|))))))))))))))) (_ bv1 1))) (or (forall ((v_DerPreprocessor_2 (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_DerPreprocessor_2)))))))))))))) (_ bv1 1)))) (and (not (= |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_16| |c_node_create_~temp~0#1.base|)) (not (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_26| |c_node_create_~temp~0#1.base|))))) (exists ((|v_node_create_~temp~0#1.base_279| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_279|)))))) (or (and (exists ((v_DerPreprocessor_2 (_ BitVec 32))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_279| (_ bv1 1)) v_DerPreprocessor_2))))))))))))))) (_ bv1 1))))) (or (= |v_node_create_~temp~0#1.base_279| |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_16|) (= |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_26| |v_node_create_~temp~0#1.base_279|))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_279| (_ bv1 1)) |v_ULTIMATE.start_sll_circular_create_~head~0#1.base_BEFORE_CALL_16|))))))))))))))))))) (_ bv1 1))))))))) is different from true [2021-11-20 23:27:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 7 not checked. [2021-11-20 23:27:21,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [114171564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:27:21,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13831017] [2021-11-20 23:27:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:27:21,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:27:21,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:27:21,533 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:27:21,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7a2334-dbb6-4bc7-ab88-9f18ce150a18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-20 23:27:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:27:21,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 23:27:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:27:25,881 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:27:25,881 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 20 treesize of output 20 [2021-11-20 23:27:25,982 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 11 treesize of output 7 [2021-11-20 23:27:27,386 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:27:27,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-20 23:27:35,679 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-11-20 23:27:35,679 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 54 [2021-11-20 23:27:38,842 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 23:27:38,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2021-11-20 23:27:39,109 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 28 treesize of output 16 [2021-11-20 23:27:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 23:27:39,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:28:02,972 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (|ULTIMATE.start_sll_circular_update_at_~head#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_#t~mem12#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_#t~mem12#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_sll_circular_update_at_~head#1.offset|) v_DerPreprocessor_2)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))))))))))) is different from false