./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c82ac198a2cdefe88b8a30e2f9953153e9db943 ............................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c82ac198a2cdefe88b8a30e2f9953153e9db943 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:58:11,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:58:11,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:58:11,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:58:11,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:58:11,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:58:11,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:58:11,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:58:11,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:58:11,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:58:11,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:58:11,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:58:11,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:58:11,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:58:11,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:58:11,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:58:11,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:58:11,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:58:11,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:58:11,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:58:11,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:58:11,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:58:11,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:58:11,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:58:11,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:58:11,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:58:11,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:58:11,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:58:11,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:58:11,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:58:11,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:58:11,661 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:58:11,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:58:11,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:58:11,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:58:11,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:58:11,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:58:11,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:58:11,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:58:11,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:58:11,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:58:11,677 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:58:11,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:58:11,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:58:11,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:58:11,713 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:58:11,713 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:58:11,713 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:58:11,713 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:58:11,714 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:58:11,714 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:58:11,714 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:58:11,721 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:58:11,722 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:58:11,722 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:58:11,722 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:58:11,723 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:58:11,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:58:11,724 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:58:11,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:58:11,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:58:11,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:58:11,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:58:11,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:58:11,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:58:11,725 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:58:11,726 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:58:11,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:58:11,726 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:58:11,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:58:11,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:58:11,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:58:11,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:58:11,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:58:11,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:58:11,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:58:11,730 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:58:11,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:58:11,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:58:11,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:58:11,731 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:58:11,731 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_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c82ac198a2cdefe88b8a30e2f9953153e9db943 [2021-10-13 07:58:11,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:58:12,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:58:12,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:58:12,010 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:58:12,013 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:58:12,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-13 07:58:12,081 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/data/b0e3f1384/f7734136f6704daf9882f4d8442cd47b/FLAGb7a4fa032 [2021-10-13 07:58:12,631 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:58:12,631 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-13 07:58:12,645 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/data/b0e3f1384/f7734136f6704daf9882f4d8442cd47b/FLAGb7a4fa032 [2021-10-13 07:58:12,916 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/data/b0e3f1384/f7734136f6704daf9882f4d8442cd47b [2021-10-13 07:58:12,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:58:12,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:58:12,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:58:12,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:58:12,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:58:12,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:58:12" (1/1) ... [2021-10-13 07:58:12,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11bbafde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:12, skipping insertion in model container [2021-10-13 07:58:12,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:58:12" (1/1) ... [2021-10-13 07:58:12,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:58:12,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:58:13,269 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-13 07:58:13,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:58:13,286 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:58:13,351 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-13 07:58:13,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:58:13,382 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:58:13,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:13 WrapperNode [2021-10-13 07:58:13,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:58:13,384 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:58:13,384 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:58:13,385 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:58:13,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:13" (1/1) ... [2021-10-13 07:58:13,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:13" (1/1) ... [2021-10-13 07:58:13,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:58:13,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:58:13,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:58:13,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:58:13,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:13" (1/1) ... [2021-10-13 07:58:13,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:13" (1/1) ... [2021-10-13 07:58:13,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:13" (1/1) ... [2021-10-13 07:58:13,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:13" (1/1) ... [2021-10-13 07:58:13,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:13" (1/1) ... [2021-10-13 07:58:13,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:13" (1/1) ... [2021-10-13 07:58:13,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:13" (1/1) ... [2021-10-13 07:58:13,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:58:13,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:58:13,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:58:13,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:58:13,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:13" (1/1) ... [2021-10-13 07:58:13,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:58:13,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:58:13,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:58:13,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:58:13,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:58:13,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:58:13,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:58:13,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:58:13,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:58:13,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:58:13,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:58:13,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 07:58:13,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:58:13,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:58:13,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:58:14,388 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:58:14,388 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-13 07:58:14,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:58:14 BoogieIcfgContainer [2021-10-13 07:58:14,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:58:14,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:58:14,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:58:14,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:58:14,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:58:12" (1/3) ... [2021-10-13 07:58:14,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b6aa7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:58:14, skipping insertion in model container [2021-10-13 07:58:14,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:13" (2/3) ... [2021-10-13 07:58:14,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b6aa7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:58:14, skipping insertion in model container [2021-10-13 07:58:14,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:58:14" (3/3) ... [2021-10-13 07:58:14,404 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2021-10-13 07:58:14,415 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:58:14,415 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:58:14,461 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:58:14,468 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:58:14,468 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:58:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:58:14,488 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:58:14,488 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:58:14,489 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:58:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:58:14,495 INFO L82 PathProgramCache]: Analyzing trace with hash -474777874, now seen corresponding path program 1 times [2021-10-13 07:58:14,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:58:14,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790595072] [2021-10-13 07:58:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:58:14,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:58:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:58:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:58:14,686 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:58:14,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790595072] [2021-10-13 07:58:14,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790595072] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:58:14,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:58:14,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:58:14,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497326143] [2021-10-13 07:58:14,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:58:14,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:58:14,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:58:14,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:58:14,711 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:14,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:58:14,748 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2021-10-13 07:58:14,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:58:14,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:58:14,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:58:14,758 INFO L225 Difference]: With dead ends: 27 [2021-10-13 07:58:14,758 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 07:58:14,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:58:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 07:58:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-10-13 07:58:14,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-13 07:58:14,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2021-10-13 07:58:14,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:58:14,792 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-13 07:58:14,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-13 07:58:14,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:58:14,793 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:58:14,793 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:58:14,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:58:14,794 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:58:14,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:58:14,794 INFO L82 PathProgramCache]: Analyzing trace with hash -885419831, now seen corresponding path program 1 times [2021-10-13 07:58:14,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:58:14,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025126729] [2021-10-13 07:58:14,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:58:14,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:58:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:58:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:58:14,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:58:14,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025126729] [2021-10-13 07:58:14,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025126729] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:58:14,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985366171] [2021-10-13 07:58:14,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:58:14,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:58:14,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:58:14,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:58:14,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:58:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:58:15,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:58:15,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:58:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:58:15,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:58:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:58:15,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985366171] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:58:15,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1143057830] [2021-10-13 07:58:15,221 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-13 07:58:15,222 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:58:15,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:58:15,234 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:58:15,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:58:15,283 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:15,292 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:58:15,294 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:15,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:58:15,299 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:58:15,300 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:15,301 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:58:15,311 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-13 07:58:15,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:58:15,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:58:15,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:58:15,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 07:58:15,367 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:15,368 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:58:15,379 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:15,380 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:58:15,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:58:15,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:58:15,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:15,456 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:15,460 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-13 07:58:15,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:58:15,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:140, output treesize:143 [2021-10-13 07:58:15,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:58:15,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:58:15,663 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_37| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) 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:608) 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:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) 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) [2021-10-13 07:58:15,666 INFO L168 Benchmark]: Toolchain (without parser) took 2742.80 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 60.4 MB in the beginning and 64.8 MB in the end (delta: -4.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:58:15,667 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 92.3 MB. Free memory was 60.4 MB in the beginning and 60.4 MB in the end (delta: 49.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:58:15,668 INFO L168 Benchmark]: CACSL2BoogieTranslator took 458.46 ms. Allocated memory is still 92.3 MB. Free memory was 60.2 MB in the beginning and 43.5 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:58:15,668 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.93 ms. Allocated memory is still 92.3 MB. Free memory was 43.5 MB in the beginning and 41.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:58:15,669 INFO L168 Benchmark]: Boogie Preprocessor took 73.22 ms. Allocated memory is still 92.3 MB. Free memory was 41.4 MB in the beginning and 39.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:58:15,670 INFO L168 Benchmark]: RCFGBuilder took 867.33 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 39.8 MB in the beginning and 73.5 MB in the end (delta: -33.7 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:58:15,671 INFO L168 Benchmark]: TraceAbstraction took 1271.86 ms. Allocated memory is still 111.1 MB. Free memory was 72.8 MB in the beginning and 64.8 MB in the end (delta: 8.1 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:58:15,674 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 92.3 MB. Free memory was 60.4 MB in the beginning and 60.4 MB in the end (delta: 49.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 458.46 ms. Allocated memory is still 92.3 MB. Free memory was 60.2 MB in the beginning and 43.5 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.93 ms. Allocated memory is still 92.3 MB. Free memory was 43.5 MB in the beginning and 41.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 73.22 ms. Allocated memory is still 92.3 MB. Free memory was 41.4 MB in the beginning and 39.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 867.33 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 39.8 MB in the beginning and 73.5 MB in the end (delta: -33.7 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1271.86 ms. Allocated memory is still 111.1 MB. Free memory was 72.8 MB in the beginning and 64.8 MB in the end (delta: 8.1 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_37| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_37|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:58:15,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:58:18,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:58:18,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:58:18,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:58:18,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:58:18,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:58:18,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:58:18,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:58:18,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:58:18,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:58:18,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:58:18,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:58:18,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:58:18,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:58:18,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:58:18,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:58:18,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:58:18,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:58:18,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:58:18,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:58:18,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:58:18,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:58:18,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:58:18,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:58:18,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:58:18,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:58:18,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:58:18,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:58:18,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:58:18,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:58:18,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:58:18,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:58:18,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:58:18,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:58:18,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:58:18,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:58:18,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:58:18,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:58:18,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:58:18,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:58:18,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:58:18,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:58:18,293 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:58:18,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:58:18,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:58:18,297 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:58:18,297 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:58:18,297 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:58:18,297 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:58:18,298 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:58:18,298 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:58:18,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:58:18,300 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:58:18,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:58:18,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:58:18,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:58:18,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:58:18,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:58:18,302 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:58:18,302 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:58:18,302 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:58:18,302 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:58:18,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:58:18,303 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:58:18,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:58:18,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:58:18,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:58:18,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:58:18,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:58:18,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:58:18,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:58:18,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:58:18,305 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:58:18,305 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:58:18,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:58:18,306 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:58:18,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:58:18,306 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_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c82ac198a2cdefe88b8a30e2f9953153e9db943 [2021-10-13 07:58:18,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:58:18,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:58:18,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:58:18,756 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:58:18,757 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:58:18,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-13 07:58:18,827 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/data/1a54d0edf/705b0d1446884629814ea0e898babe91/FLAGbf3e0f424 [2021-10-13 07:58:19,483 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:58:19,484 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-13 07:58:19,496 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/data/1a54d0edf/705b0d1446884629814ea0e898babe91/FLAGbf3e0f424 [2021-10-13 07:58:19,800 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/data/1a54d0edf/705b0d1446884629814ea0e898babe91 [2021-10-13 07:58:19,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:58:19,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:58:19,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:58:19,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:58:19,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:58:19,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:58:19" (1/1) ... [2021-10-13 07:58:19,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d00e8b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:19, skipping insertion in model container [2021-10-13 07:58:19,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:58:19" (1/1) ... [2021-10-13 07:58:19,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:58:19,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:58:20,308 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-13 07:58:20,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:58:20,335 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:58:20,402 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-13 07:58:20,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:58:20,449 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:58:20,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:20 WrapperNode [2021-10-13 07:58:20,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:58:20,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:58:20,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:58:20,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:58:20,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:20" (1/1) ... [2021-10-13 07:58:20,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:20" (1/1) ... [2021-10-13 07:58:20,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:58:20,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:58:20,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:58:20,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:58:20,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:20" (1/1) ... [2021-10-13 07:58:20,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:20" (1/1) ... [2021-10-13 07:58:20,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:20" (1/1) ... [2021-10-13 07:58:20,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:20" (1/1) ... [2021-10-13 07:58:20,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:20" (1/1) ... [2021-10-13 07:58:20,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:20" (1/1) ... [2021-10-13 07:58:20,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:20" (1/1) ... [2021-10-13 07:58:20,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:58:20,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:58:20,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:58:20,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:58:20,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:20" (1/1) ... [2021-10-13 07:58:20,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:58:20,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:58:20,652 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:58:20,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:58:20,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:58:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:58:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:58:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:58:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:58:20,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:58:20,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:58:20,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 07:58:20,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:58:20,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:58:20,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:58:21,154 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:58:21,155 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-13 07:58:21,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:58:21 BoogieIcfgContainer [2021-10-13 07:58:21,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:58:21,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:58:21,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:58:21,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:58:21,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:58:19" (1/3) ... [2021-10-13 07:58:21,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5746165b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:58:21, skipping insertion in model container [2021-10-13 07:58:21,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:20" (2/3) ... [2021-10-13 07:58:21,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5746165b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:58:21, skipping insertion in model container [2021-10-13 07:58:21,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:58:21" (3/3) ... [2021-10-13 07:58:21,164 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2021-10-13 07:58:21,169 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:58:21,169 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:58:21,234 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:58:21,242 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:58:21,242 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:58:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:58:21,271 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:58:21,272 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:58:21,272 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:58:21,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:58:21,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1295164731, now seen corresponding path program 1 times [2021-10-13 07:58:21,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:58:21,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678069992] [2021-10-13 07:58:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:58:21,294 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:58:21,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:58:21,301 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:58:21,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:58:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:58:21,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:58:21,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:58:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:58:21,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:58:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:58:21,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:58:21,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678069992] [2021-10-13 07:58:21,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678069992] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:58:21,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:58:21,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:58:21,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204244006] [2021-10-13 07:58:21,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:58:21,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:58:21,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:58:21,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:58:21,667 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:58:21,685 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2021-10-13 07:58:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:58:21,687 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:58:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:58:21,696 INFO L225 Difference]: With dead ends: 46 [2021-10-13 07:58:21,697 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 07:58:21,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:58:21,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 07:58:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-13 07:58:21,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-10-13 07:58:21,733 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2021-10-13 07:58:21,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:58:21,733 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-10-13 07:58:21,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:21,734 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-10-13 07:58:21,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:58:21,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:58:21,736 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:58:21,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:58:21,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:58:21,949 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:58:21,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:58:21,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1295173380, now seen corresponding path program 1 times [2021-10-13 07:58:21,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:58:21,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614990819] [2021-10-13 07:58:21,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:58:21,951 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:58:21,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:58:21,952 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:58:21,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:58:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:58:22,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:58:22,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:58:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:58:22,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:58:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:58:22,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:58:22,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614990819] [2021-10-13 07:58:22,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614990819] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:58:22,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:58:22,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:58:22,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930014024] [2021-10-13 07:58:22,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:58:22,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:58:22,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:58:22,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:58:22,183 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:58:22,205 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-10-13 07:58:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:58:22,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:58:22,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:58:22,207 INFO L225 Difference]: With dead ends: 39 [2021-10-13 07:58:22,207 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 07:58:22,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:58:22,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 07:58:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-13 07:58:22,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:22,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-10-13 07:58:22,213 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 14 [2021-10-13 07:58:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:58:22,213 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-10-13 07:58:22,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-10-13 07:58:22,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:58:22,214 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:58:22,215 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:58:22,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:58:22,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:58:22,428 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:58:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:58:22,428 INFO L82 PathProgramCache]: Analyzing trace with hash -964558884, now seen corresponding path program 1 times [2021-10-13 07:58:22,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:58:22,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557543978] [2021-10-13 07:58:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:58:22,430 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:58:22,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:58:22,431 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:58:22,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:58:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:58:22,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:58:22,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:58:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:58:22,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:58:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:58:22,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:58:22,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557543978] [2021-10-13 07:58:22,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557543978] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:58:22,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:58:22,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:58:22,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649922249] [2021-10-13 07:58:22,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:58:22,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:58:22,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:58:22,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:58:22,779 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:58:22,863 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2021-10-13 07:58:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:58:22,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 07:58:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:58:22,864 INFO L225 Difference]: With dead ends: 47 [2021-10-13 07:58:22,864 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 07:58:22,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:58:22,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 07:58:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-10-13 07:58:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-10-13 07:58:22,869 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 24 [2021-10-13 07:58:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:58:22,870 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-10-13 07:58:22,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-10-13 07:58:22,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:58:22,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:58:22,871 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:58:22,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:58:23,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:58:23,083 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:58:23,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:58:23,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1641464670, now seen corresponding path program 1 times [2021-10-13 07:58:23,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:58:23,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227618143] [2021-10-13 07:58:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:58:23,085 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:58:23,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:58:23,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:58:23,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:58:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:58:23,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:58:23,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:58:23,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 07:58:23,521 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 16 treesize of output 8 [2021-10-13 07:58:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 07:58:23,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:58:23,568 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 30 treesize of output 26 [2021-10-13 07:58:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 07:58:23,689 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:58:23,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227618143] [2021-10-13 07:58:23,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227618143] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:58:23,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:58:23,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-10-13 07:58:23,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769808727] [2021-10-13 07:58:23,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:58:23,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:58:23,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:58:23,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:58:23,694 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:58:24,027 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-10-13 07:58:24,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:58:24,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 07:58:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:58:24,030 INFO L225 Difference]: With dead ends: 33 [2021-10-13 07:58:24,030 INFO L226 Difference]: Without dead ends: 30 [2021-10-13 07:58:24,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:58:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-13 07:58:24,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-10-13 07:58:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-13 07:58:24,037 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 24 [2021-10-13 07:58:24,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:58:24,038 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-13 07:58:24,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:58:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-13 07:58:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:58:24,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:58:24,040 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:58:24,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:58:24,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:58:24,241 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:58:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:58:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1641466344, now seen corresponding path program 1 times [2021-10-13 07:58:24,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:58:24,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707885189] [2021-10-13 07:58:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:58:24,243 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:58:24,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:58:24,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:58:24,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:58:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:58:24,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 07:58:24,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:58:24,613 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 [2021-10-13 07:58:24,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:58:25,019 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-10-13 07:58:25,021 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 38 treesize of output 38 [2021-10-13 07:58:25,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:58:25,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:58:25,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:58:25,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:58:25,521 INFO L354 Elim1Store]: treesize reduction 196, result has 26.0 percent of original size [2021-10-13 07:58:25,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 94 [2021-10-13 07:58:25,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:58:25,906 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 27 treesize of output 11 [2021-10-13 07:58:25,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:58:25,987 INFO L354 Elim1Store]: treesize reduction 42, result has 34.4 percent of original size [2021-10-13 07:58:25,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 50 [2021-10-13 07:58:26,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:58:26,283 INFO L354 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2021-10-13 07:58:26,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 59 [2021-10-13 07:58:26,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2021-10-13 07:58:26,322 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-13 07:58:26,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-10-13 07:58:26,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-10-13 07:58:26,529 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-13 07:58:26,530 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 37 treesize of output 25 [2021-10-13 07:58:26,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:58:26,664 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 43 treesize of output 31 [2021-10-13 07:58:26,670 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 20 [2021-10-13 07:58:26,783 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 24 treesize of output 16 [2021-10-13 07:58:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:58:26,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:58:27,006 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 76 treesize of output 72 [2021-10-13 07:58:27,010 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 106 treesize of output 98 [2021-10-13 07:58:27,018 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:27,021 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-10-13 07:58:27,835 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:27,838 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-10-13 07:58:27,841 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 136 treesize of output 120 [2021-10-13 07:58:36,640 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:36,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 312 [2021-10-13 07:58:52,354 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 3280 treesize of output 3272 [2021-10-13 07:58:52,423 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:52,481 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5354 [2021-10-13 07:59:03,050 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 3072279 treesize of output 3039251 [2021-10-13 07:59:18,035 WARN L207 SmtUtils]: Spent 14.98 s on a formula simplification that was a NOOP. DAG size: 463 [2021-10-13 08:01:09,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-13 08:01:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:01:09,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:09,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707885189] [2021-10-13 08:01:09,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707885189] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:01:09,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 08:01:09,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 26 [2021-10-13 08:01:09,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501566211] [2021-10-13 08:01:09,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 08:01:09,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:09,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 08:01:09,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=565, Unknown=9, NotChecked=0, Total=650 [2021-10-13 08:01:09,344 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:23,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:23,777 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-10-13 08:01:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 08:01:23,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 08:01:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:23,780 INFO L225 Difference]: With dead ends: 49 [2021-10-13 08:01:23,780 INFO L226 Difference]: Without dead ends: 47 [2021-10-13 08:01:23,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 31829.3ms TimeCoverageRelationStatistics Valid=184, Invalid=1066, Unknown=10, NotChecked=0, Total=1260 [2021-10-13 08:01:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-13 08:01:23,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2021-10-13 08:01:23,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:23,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-10-13 08:01:23,789 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2021-10-13 08:01:23,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:23,790 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-10-13 08:01:23,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:23,790 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-10-13 08:01:23,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 08:01:23,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:23,791 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:23,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-13 08:01:23,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:23,992 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:23,993 INFO L82 PathProgramCache]: Analyzing trace with hash 630349094, now seen corresponding path program 1 times [2021-10-13 08:01:23,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:23,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596387190] [2021-10-13 08:01:23,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:23,994 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:23,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:23,996 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:24,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 08:01:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:24,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:01:24,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:24,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:24,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:01:24,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596387190] [2021-10-13 08:01:24,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596387190] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:24,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [796579768] [2021-10-13 08:01:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:24,350 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:01:24,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:01:24,352 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:01:24,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 08:01:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:24,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:01:24,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:24,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:24,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [796579768] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:24,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542940115] [2021-10-13 08:01:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:24,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:01:24,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:01:24,735 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:01:24,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 08:01:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:24,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:01:24,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:25,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:01:25,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542940115] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:01:25,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:01:25,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2021-10-13 08:01:25,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356644438] [2021-10-13 08:01:25,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:01:25,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:01:25,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:01:25,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:01:25,093 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:01:25,246 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-10-13 08:01:25,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:01:25,247 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 08:01:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:01:25,248 INFO L225 Difference]: With dead ends: 59 [2021-10-13 08:01:25,248 INFO L226 Difference]: Without dead ends: 28 [2021-10-13 08:01:25,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:01:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-13 08:01:25,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-13 08:01:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-13 08:01:25,254 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2021-10-13 08:01:25,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:01:25,255 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-13 08:01:25,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:01:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-13 08:01:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 08:01:25,256 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:01:25,256 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:01:25,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:25,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:01:25,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-13 08:01:25,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:01:25,875 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:01:25,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:01:25,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1196191993, now seen corresponding path program 1 times [2021-10-13 08:01:25,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:01:25,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171657818] [2021-10-13 08:01:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:01:25,876 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:01:25,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:01:25,877 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:01:25,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 08:01:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:01:26,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 08:01:26,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:01:26,227 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 [2021-10-13 08:01:26,320 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 [2021-10-13 08:01:26,605 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-10-13 08:01:26,605 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 46 treesize of output 46 [2021-10-13 08:01:26,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:01:26,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:01:26,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:01:27,018 INFO L354 Elim1Store]: treesize reduction 196, result has 26.0 percent of original size [2021-10-13 08:01:27,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 98 [2021-10-13 08:01:27,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:01:27,460 INFO L354 Elim1Store]: treesize reduction 45, result has 29.7 percent of original size [2021-10-13 08:01:27,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 51 [2021-10-13 08:01:27,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:01:27,768 INFO L354 Elim1Store]: treesize reduction 134, result has 23.0 percent of original size [2021-10-13 08:01:27,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 70 [2021-10-13 08:01:27,774 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 82 treesize of output 74 [2021-10-13 08:01:28,160 INFO L354 Elim1Store]: treesize reduction 130, result has 22.6 percent of original size [2021-10-13 08:01:28,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 81 [2021-10-13 08:01:28,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:01:28,342 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 92 treesize of output 84 [2021-10-13 08:01:28,583 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-13 08:01:28,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 30 [2021-10-13 08:01:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:01:28,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:01:28,959 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 82 treesize of output 78 [2021-10-13 08:01:37,206 WARN L207 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-10-13 08:01:37,219 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 118 treesize of output 102 [2021-10-13 08:01:37,238 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 118 treesize of output 102 [2021-10-13 08:02:05,234 WARN L207 SmtUtils]: Spent 14.43 s on a formula simplification that was a NOOP. DAG size: 49 [2021-10-13 08:02:07,277 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimCell_48 (_ BitVec 32))) (not (= (let ((.cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|))) (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) .cse4 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))))) (let ((.cse3 (select (select .cse2 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse2 .cse3 (store (select .cse2 .cse3) (bvadd (_ bv8 32) v_arrayElimCell_48) |c_ULTIMATE.start_node_create_#res.base|)))))) (store .cse1 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse1 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset |c_ULTIMATE.start_node_create_#res.base|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) .cse4)) (_ bv0 32)))) (or (forall ((v_arrayElimCell_47 (_ BitVec 32)) (v_arrayElimCell_46 (_ BitVec 32))) (not (= (select (let ((.cse5 (let ((.cse6 (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|) (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))))) (let ((.cse8 (select (select .cse7 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse7 .cse8 (store (select .cse7 .cse8) (bvadd (_ bv8 32) v_arrayElimCell_47) |c_ULTIMATE.start_node_create_#res.base|)))))) (store .cse6 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset |c_ULTIMATE.start_node_create_#res.base|))))) (select .cse5 (select (select .cse5 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) (bvadd (_ bv4 32) v_arrayElimCell_46)) (_ bv0 32)))) (and (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset) (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|)))) is different from false [2021-10-13 08:02:07,301 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:07,303 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1653 [2021-10-13 08:02:07,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:07,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171657818] [2021-10-13 08:02:07,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_arrayElimCell_48 [2021-10-13 08:02:07,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [882531864] [2021-10-13 08:02:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:07,377 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:07,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:02:07,391 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:02:07,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 08:02:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:07,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-13 08:02:07,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:07,999 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 [2021-10-13 08:02:08,508 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 08:02:08,508 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 22 treesize of output 22 [2021-10-13 08:02:08,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:08,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:08,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:08,779 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-10-13 08:02:08,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-10-13 08:02:08,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:08,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:08,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:08,851 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-10-13 08:02:08,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2021-10-13 08:02:09,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:09,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:09,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:09,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:09,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-10-13 08:02:09,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:09,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:09,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:09,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:09,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 36 [2021-10-13 08:02:09,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:09,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:09,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:09,682 INFO L354 Elim1Store]: treesize reduction 120, result has 17.8 percent of original size [2021-10-13 08:02:09,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 81 [2021-10-13 08:02:09,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:09,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:09,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:09,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:09,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 67 [2021-10-13 08:02:09,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:02:09,948 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 08:02:09,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 51 [2021-10-13 08:02:10,158 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 74 treesize of output 66 [2021-10-13 08:02:10,445 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:02:10,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 30 [2021-10-13 08:02:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:02:10,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:10,585 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 82 treesize of output 78 [2021-10-13 08:02:17,048 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse10 (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|))) (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) .cse10 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))))) (let ((.cse8 (select (select .cse7 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)) (.cse9 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_#res.base|) .cse10 (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (or (and (or (forall ((v_arrayElimCell_46 (_ BitVec 32))) (not (= (_ bv0 32) (select (let ((.cse0 (let ((.cse1 (let ((.cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) .cse4 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))))) (let ((.cse3 (select (select .cse2 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse2 .cse3 (store (select .cse2 .cse3) (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_#res.base|) .cse4 (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)) |c_ULTIMATE.start_node_create_#res.base|))))))) (store .cse1 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse1 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset |c_ULTIMATE.start_node_create_#res.base|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) (bvadd (_ bv4 32) v_arrayElimCell_46))))) (and (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset) (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|))) (not (= (select (let ((.cse5 (let ((.cse6 (store .cse7 .cse8 (store (select .cse7 .cse8) (bvadd (_ bv8 32) .cse9) |c_ULTIMATE.start_node_create_#res.base|)))) (store .cse6 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset |c_ULTIMATE.start_node_create_#res.base|))))) (select .cse5 (select (select .cse5 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) .cse10) (_ bv0 32)))) (and (= .cse8 (_ bv0 32)) (= (_ bv0 32) .cse9)))))) is different from false [2021-10-13 08:02:17,076 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:17,077 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1898 [2021-10-13 08:02:17,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:17,082 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2151 [2021-10-13 08:02:20,415 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_6 (_ BitVec 32))) (let ((.cse5 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset)) (.cse15 (bvadd (_ bv8 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse4 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse16 (store (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse5 (_ bv0 32)) .cse15 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_6))) (store .cse16 .cse5 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base .cse16) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)))))) (let ((.cse0 (select (select .cse4 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)) (.cse1 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse14 (store (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) .cse5 (_ bv0 32)) .cse15 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_7))) (store .cse14 .cse5 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base .cse14) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)))) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (or (and (= .cse0 (_ bv0 32)) (= .cse1 (_ bv0 32))) (and (not (= (select (let ((.cse2 (let ((.cse3 (store .cse4 .cse0 (store (select .cse4 .cse0) (bvadd (_ bv8 32) .cse1) c_ULTIMATE.start_node_create_~temp~0.base)))) (store .cse3 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse3 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.base))))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) .cse5) (_ bv0 32))) (or (forall ((v_arrayElimCell_46 (_ BitVec 32))) (not (= (select (let ((.cse6 (let ((.cse7 (let ((.cse11 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset)) (.cse12 (bvadd (_ bv8 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse8 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse13 (store (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse11 (_ bv0 32)) .cse12 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_6))) (store .cse13 .cse11 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base .cse13) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)))))) (let ((.cse9 (select (select .cse8 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse8 .cse9 (store (select .cse8 .cse9) (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse10 (store (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) .cse11 (_ bv0 32)) .cse12 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_7))) (store .cse10 .cse11 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base .cse10) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)))) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)) c_ULTIMATE.start_node_create_~temp~0.base))))))) (store .cse7 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse7 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.base))))) (select .cse6 (select (select .cse6 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) (bvadd (_ bv4 32) v_arrayElimCell_46)) (_ bv0 32)))) (and (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset) (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|))))))))) is different from false [2021-10-13 08:02:21,653 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 24279 treesize of output 23695 [2021-10-13 08:02:22,645 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 30613 treesize of output 30201 [2021-10-13 08:02:23,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:02:23,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092781670] [2021-10-13 08:02:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:23,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:23,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:23,873 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:23,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 08:02:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:24,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 08:02:24,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:24,303 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 [2021-10-13 08:02:24,705 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 08:02:24,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 08:02:26,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:26,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:26,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:27,064 INFO L354 Elim1Store]: treesize reduction 80, result has 29.2 percent of original size [2021-10-13 08:02:27,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 60 [2021-10-13 08:02:27,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:27,318 INFO L354 Elim1Store]: treesize reduction 45, result has 29.7 percent of original size [2021-10-13 08:02:27,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 51 [2021-10-13 08:02:27,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:27,569 INFO L354 Elim1Store]: treesize reduction 134, result has 23.0 percent of original size [2021-10-13 08:02:27,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 70 [2021-10-13 08:02:27,575 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 82 treesize of output 74 [2021-10-13 08:02:27,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:02:27,914 INFO L354 Elim1Store]: treesize reduction 130, result has 22.6 percent of original size [2021-10-13 08:02:27,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 81 [2021-10-13 08:02:27,997 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 92 treesize of output 84 [2021-10-13 08:02:28,178 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-13 08:02:28,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 30 [2021-10-13 08:02:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:02:28,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:28,337 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 82 treesize of output 78 [2021-10-13 08:02:28,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 102 [2021-10-13 08:02:28,545 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 118 treesize of output 102 [2021-10-13 08:02:40,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:40,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1653 [2021-10-13 08:02:40,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_arrayElimCell_48 [2021-10-13 08:02:40,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:02:40,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 08:02:40,953 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 08:02:40,953 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 08:02:40,959 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:40,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:41,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:41,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:41,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:41,565 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:02:41,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:02:41 BoogieIcfgContainer [2021-10-13 08:02:41,579 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:02:41,579 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:02:41,579 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:02:41,580 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:02:41,580 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:58:21" (3/4) ... [2021-10-13 08:02:41,582 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 08:02:41,582 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:02:41,583 INFO L168 Benchmark]: Toolchain (without parser) took 261779.04 ms. Allocated memory was 56.6 MB in the beginning and 308.3 MB in the end (delta: 251.7 MB). Free memory was 32.8 MB in the beginning and 161.9 MB in the end (delta: -129.1 MB). Peak memory consumption was 122.3 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:41,583 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 56.6 MB. Free memory was 37.7 MB in the beginning and 37.6 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:02:41,583 INFO L168 Benchmark]: CACSL2BoogieTranslator took 642.15 ms. Allocated memory is still 56.6 MB. Free memory was 32.7 MB in the beginning and 30.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:41,584 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.59 ms. Allocated memory is still 56.6 MB. Free memory was 30.3 MB in the beginning and 28.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:41,584 INFO L168 Benchmark]: Boogie Preprocessor took 60.90 ms. Allocated memory is still 56.6 MB. Free memory was 28.0 MB in the beginning and 26.2 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:02:41,585 INFO L168 Benchmark]: RCFGBuilder took 557.48 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 26.1 MB in the beginning and 39.5 MB in the end (delta: -13.4 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:41,585 INFO L168 Benchmark]: TraceAbstraction took 260420.52 ms. Allocated memory was 71.3 MB in the beginning and 308.3 MB in the end (delta: 237.0 MB). Free memory was 39.1 MB in the beginning and 161.9 MB in the end (delta: -122.9 MB). Peak memory consumption was 113.3 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:41,585 INFO L168 Benchmark]: Witness Printer took 2.71 ms. Allocated memory is still 308.3 MB. Free memory is still 161.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:02:41,587 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 56.6 MB. Free memory was 37.7 MB in the beginning and 37.6 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 642.15 ms. Allocated memory is still 56.6 MB. Free memory was 32.7 MB in the beginning and 30.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 85.59 ms. Allocated memory is still 56.6 MB. Free memory was 30.3 MB in the beginning and 28.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.90 ms. Allocated memory is still 56.6 MB. Free memory was 28.0 MB in the beginning and 26.2 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 557.48 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 26.1 MB in the beginning and 39.5 MB in the end (delta: -13.4 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 260420.52 ms. Allocated memory was 71.3 MB in the beginning and 308.3 MB in the end (delta: 237.0 MB). Free memory was 39.1 MB in the beginning and 161.9 MB in the end (delta: -122.9 MB). Peak memory consumption was 113.3 MB. Max. memory is 16.1 GB. * Witness Printer took 2.71 ms. Allocated memory is still 308.3 MB. Free memory is still 161.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 638]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L619] const int len = 2; [L620] const int data = 1; [L621] DLL s = dll_create(len, data); [L586] DLL head = ((void *)0); [L587] COND TRUE len > 0 [L588] DLL new_head = (DLL) malloc(sizeof(struct node)); [L589] COND FALSE !(((void *)0) == new_head) [L592] new_head->data = data [L593] new_head->next = head [L594] new_head->prev = ((void *)0) [L595] COND FALSE !(\read(head)) [L598] head = new_head [L599] len-- [L587] COND TRUE len > 0 [L588] DLL new_head = (DLL) malloc(sizeof(struct node)); [L589] COND FALSE !(((void *)0) == new_head) [L592] new_head->data = data [L593] new_head->next = head [L594] new_head->prev = ((void *)0) [L595] COND TRUE \read(head) [L596] head->prev = new_head [L598] head = new_head [L599] len-- [L587] COND FALSE !(len > 0) [L601] return head; [L621] DLL s = dll_create(len, data); [L576] DLL temp = (DLL) malloc(sizeof(struct node)); [L577] COND FALSE !(((void *)0) == temp) [L580] temp->next = ((void *)0) [L581] temp->prev = ((void *)0) [L582] temp->data = data [L583] return temp; [L611] DLL new_head = node_create(data); [L612] EXPR \read(*head) [L612] new_head->next = *head [L613] EXPR \read(*head) [L613] COND TRUE *head [L614] EXPR \read(*head) [L614] (*head)->prev = new_head [L616] *head = new_head [L623] EXPR \read(s) [L623] DLL ptr = s; [L624] int count = 0; [L625] COND TRUE \read(ptr) [L626] EXPR ptr->next [L626] DLL temp = ptr->next; [L627] EXPR ptr->data [L627] COND FALSE !(data != ptr->data) [L630] ptr = temp [L631] count++ [L625] COND FALSE !(\read(ptr)) [L633] COND TRUE count != 1 + len [L638] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 260332.5ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 15.8ms, AutomataDifference: 15103.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 124 SDtfs, 160 SDslu, 183 SDs, 0 SdLazy, 324 SolverSat, 19 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 10968.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 343 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 32016.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=5, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49.2ms AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 148.7ms SsaConstructionTime, 476.4ms SatisfiabilityAnalysisTime, 166292.6ms InterpolantComputationTime, 172 NumberOfCodeBlocks, 172 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 328 ConstructedInterpolants, 20 QuantifiedInterpolants, 2111 SizeOfPredicates, 53 NumberOfNonLiveVariables, 883 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 16 InterpolantComputations, 9 PerfectInterpolantSequences, 60/84 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 08:02:41,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae212b7a-2c84-4ec7-9f53-061feddb7a80/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...