./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested3-1.c --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_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/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_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested3-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/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_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/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 d20380c7a8af013b35f7d593b0456e6ffc5499d6 .......................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/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_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested3-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/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_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/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 d20380c7a8af013b35f7d593b0456e6ffc5499d6 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:44:24,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:44:24,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:44:24,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:44:24,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:44:24,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:44:24,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:44:24,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:44:24,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:44:24,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:44:24,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:44:24,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:44:24,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:44:24,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:44:24,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:44:24,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:44:24,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:44:24,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:44:24,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:44:24,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:44:24,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:44:24,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:44:24,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:44:24,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:44:24,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:44:24,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:44:24,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:44:24,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:44:24,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:44:24,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:44:24,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:44:24,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:44:24,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:44:24,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:44:24,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:44:24,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:44:24,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:44:24,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:44:24,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:44:24,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:44:24,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:44:24,450 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:44:24,497 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:44:24,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:44:24,499 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:44:24,500 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:44:24,500 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:44:24,500 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:44:24,501 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:44:24,501 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:44:24,504 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:44:24,504 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:44:24,505 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:44:24,505 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:44:24,505 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:44:24,506 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:44:24,507 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:44:24,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:44:24,508 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:44:24,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:44:24,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:44:24,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:44:24,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:44:24,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:44:24,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:44:24,509 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:44:24,510 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:44:24,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:44:24,510 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:44:24,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:44:24,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:44:24,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:44:24,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:44:24,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:44:24,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:44:24,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:44:24,514 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:44:24,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:44:24,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:44:24,514 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:44:24,514 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:44:24,515 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_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d20380c7a8af013b35f7d593b0456e6ffc5499d6 [2021-10-13 07:44:24,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:44:24,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:44:24,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:44:24,815 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:44:24,816 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:44:24,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2021-10-13 07:44:24,892 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/data/58f3170a7/26b376b86627403eb584899843c4ce46/FLAG8741f7464 [2021-10-13 07:44:25,402 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:44:25,403 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2021-10-13 07:44:25,409 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/data/58f3170a7/26b376b86627403eb584899843c4ce46/FLAG8741f7464 [2021-10-13 07:44:25,777 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/data/58f3170a7/26b376b86627403eb584899843c4ce46 [2021-10-13 07:44:25,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:44:25,781 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:44:25,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:44:25,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:44:25,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:44:25,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:44:25" (1/1) ... [2021-10-13 07:44:25,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79bcee8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:25, skipping insertion in model container [2021-10-13 07:44:25,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:44:25" (1/1) ... [2021-10-13 07:44:25,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:44:25,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:44:26,008 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_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2021-10-13 07:44:26,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:44:26,045 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:44:26,061 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_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2021-10-13 07:44:26,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:44:26,089 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:44:26,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:26 WrapperNode [2021-10-13 07:44:26,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:44:26,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:44:26,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:44:26,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:44:26,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:26" (1/1) ... [2021-10-13 07:44:26,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:26" (1/1) ... [2021-10-13 07:44:26,145 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:44:26,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:44:26,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:44:26,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:44:26,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:26" (1/1) ... [2021-10-13 07:44:26,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:26" (1/1) ... [2021-10-13 07:44:26,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:26" (1/1) ... [2021-10-13 07:44:26,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:26" (1/1) ... [2021-10-13 07:44:26,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:26" (1/1) ... [2021-10-13 07:44:26,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:26" (1/1) ... [2021-10-13 07:44:26,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:26" (1/1) ... [2021-10-13 07:44:26,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:44:26,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:44:26,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:44:26,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:44:26,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:26" (1/1) ... [2021-10-13 07:44:26,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:44:26,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:44:26,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:44:26,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:44:26,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:44:26,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:44:26,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:44:26,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:44:26,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:44:26,569 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 07:44:26,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:44:26 BoogieIcfgContainer [2021-10-13 07:44:26,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:44:26,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:44:26,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:44:26,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:44:26,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:44:25" (1/3) ... [2021-10-13 07:44:26,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b513ca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:44:26, skipping insertion in model container [2021-10-13 07:44:26,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:26" (2/3) ... [2021-10-13 07:44:26,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b513ca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:44:26, skipping insertion in model container [2021-10-13 07:44:26,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:44:26" (3/3) ... [2021-10-13 07:44:26,598 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2021-10-13 07:44:26,603 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:44:26,603 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 07:44:26,668 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:44:26,681 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 07:44:26,681 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 07:44:26,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 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 07:44:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:44:26,705 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:26,707 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:44:26,708 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash 3328135, now seen corresponding path program 1 times [2021-10-13 07:44:26,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:44:26,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321063652] [2021-10-13 07:44:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:26,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:44:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:26,883 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 07:44:26,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:44:26,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321063652] [2021-10-13 07:44:26,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321063652] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:44:26,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:44:26,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:44:26,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161732828] [2021-10-13 07:44:26,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:44:26,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:44:26,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:44:26,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:44:26,928 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:26,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:26,997 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2021-10-13 07:44:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:44:26,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:44:27,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:27,018 INFO L225 Difference]: With dead ends: 44 [2021-10-13 07:44:27,019 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 07:44:27,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:44:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 07:44:27,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2021-10-13 07:44:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:27,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-13 07:44:27,064 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 4 [2021-10-13 07:44:27,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:27,066 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-13 07:44:27,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-10-13 07:44:27,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:44:27,067 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:27,068 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:44:27,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:44:27,069 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:27,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:27,074 INFO L82 PathProgramCache]: Analyzing trace with hash 101075770, now seen corresponding path program 1 times [2021-10-13 07:44:27,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:44:27,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859385443] [2021-10-13 07:44:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:27,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:44:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:27,157 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 07:44:27,157 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:44:27,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859385443] [2021-10-13 07:44:27,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859385443] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:44:27,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:44:27,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:44:27,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057359360] [2021-10-13 07:44:27,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:44:27,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:44:27,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:44:27,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:44:27,162 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:27,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:27,192 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-10-13 07:44:27,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:44:27,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:44:27,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:27,196 INFO L225 Difference]: With dead ends: 36 [2021-10-13 07:44:27,196 INFO L226 Difference]: Without dead ends: 22 [2021-10-13 07:44:27,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:44:27,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-13 07:44:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2021-10-13 07:44:27,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-13 07:44:27,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 5 [2021-10-13 07:44:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:27,205 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-13 07:44:27,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-13 07:44:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:44:27,206 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:27,207 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:44:27,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:44:27,207 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1163553408, now seen corresponding path program 1 times [2021-10-13 07:44:27,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:44:27,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987650460] [2021-10-13 07:44:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:27,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:44:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:27,290 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 07:44:27,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:44:27,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987650460] [2021-10-13 07:44:27,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987650460] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:44:27,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:44:27,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:44:27,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146220379] [2021-10-13 07:44:27,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:44:27,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:44:27,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:44:27,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:44:27,298 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 07:44:27,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:27,322 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-10-13 07:44:27,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:44:27,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 07:44:27,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:27,325 INFO L225 Difference]: With dead ends: 34 [2021-10-13 07:44:27,326 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 07:44:27,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:44:27,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 07:44:27,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-10-13 07:44:27,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 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 07:44:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-10-13 07:44:27,330 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2021-10-13 07:44:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:27,331 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-13 07:44:27,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 07:44:27,331 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-10-13 07:44:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:44:27,332 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:27,332 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:44:27,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:44:27,332 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:27,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1712009681, now seen corresponding path program 1 times [2021-10-13 07:44:27,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:44:27,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118033332] [2021-10-13 07:44:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:27,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:44:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:27,434 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 07:44:27,435 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:44:27,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118033332] [2021-10-13 07:44:27,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118033332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:44:27,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802955700] [2021-10-13 07:44:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:27,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:44:27,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:44:27,445 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:44:27,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:44:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:27,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:44:27,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:27,583 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 07:44:27,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:27,646 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 07:44:27,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802955700] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:27,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [815320855] [2021-10-13 07:44:27,666 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-13 07:44:27,666 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:44:27,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:44:27,679 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:44:27,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:44:27,723 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:27,739 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:44:27,745 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:27,751 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:44:27,752 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:44:27,755 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:27,755 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:44:27,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-13 07:44:27,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:44:27,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:44:27,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:44:27,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 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 07:44:27,818 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:27,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:44:27,821 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:27,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:44:27,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:44:27,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:44:27,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:27,884 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:44:27,891 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-13 07:44:27,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:44:27,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:128, output treesize:131 [2021-10-13 07:44:27,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:28,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:44:28,094 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_10| 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 07:44:28,097 INFO L168 Benchmark]: Toolchain (without parser) took 2316.01 ms. Allocated memory was 104.9 MB in the beginning and 140.5 MB in the end (delta: 35.7 MB). Free memory was 76.4 MB in the beginning and 82.5 MB in the end (delta: -6.1 MB). Peak memory consumption was 29.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:44:28,098 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 104.9 MB. Free memory is still 62.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:44:28,098 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.88 ms. Allocated memory is still 104.9 MB. Free memory was 76.4 MB in the beginning and 80.1 MB in the end (delta: -3.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:44:28,099 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.21 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 78.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:44:28,099 INFO L168 Benchmark]: Boogie Preprocessor took 21.43 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 77.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:44:28,100 INFO L168 Benchmark]: RCFGBuilder took 403.72 ms. Allocated memory is still 104.9 MB. Free memory was 77.2 MB in the beginning and 65.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:44:28,100 INFO L168 Benchmark]: TraceAbstraction took 1523.23 ms. Allocated memory was 104.9 MB in the beginning and 140.5 MB in the end (delta: 35.7 MB). Free memory was 65.2 MB in the beginning and 82.5 MB in the end (delta: -17.4 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:44:28,103 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 104.9 MB. Free memory is still 62.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 304.88 ms. Allocated memory is still 104.9 MB. Free memory was 76.4 MB in the beginning and 80.1 MB in the end (delta: -3.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.21 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 78.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.43 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 77.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 403.72 ms. Allocated memory is still 104.9 MB. Free memory was 77.2 MB in the beginning and 65.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1523.23 ms. Allocated memory was 104.9 MB in the beginning and 140.5 MB in the end (delta: 35.7 MB). Free memory was 65.2 MB in the beginning and 82.5 MB in the end (delta: -17.4 MB). Peak memory consumption was 21.1 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_10| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_10|: 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 07:44:28,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/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 07:44:30,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:44:30,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:44:30,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:44:30,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:44:30,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:44:30,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:44:30,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:44:30,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:44:30,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:44:30,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:44:30,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:44:30,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:44:30,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:44:30,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:44:30,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:44:30,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:44:30,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:44:30,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:44:30,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:44:30,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:44:30,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:44:30,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:44:30,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:44:30,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:44:30,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:44:30,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:44:30,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:44:30,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:44:30,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:44:30,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:44:30,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:44:30,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:44:30,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:44:30,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:44:30,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:44:30,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:44:30,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:44:30,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:44:30,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:44:30,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:44:30,625 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:44:30,669 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:44:30,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:44:30,671 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:44:30,671 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:44:30,671 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:44:30,671 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:44:30,672 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:44:30,672 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:44:30,672 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:44:30,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:44:30,674 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:44:30,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:44:30,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:44:30,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:44:30,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:44:30,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:44:30,676 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:44:30,676 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:44:30,676 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:44:30,676 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:44:30,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:44:30,676 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:44:30,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:44:30,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:44:30,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:44:30,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:44:30,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:44:30,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:44:30,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:44:30,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:44:30,678 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:44:30,678 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:44:30,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:44:30,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:44:30,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:44:30,680 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_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d20380c7a8af013b35f7d593b0456e6ffc5499d6 [2021-10-13 07:44:31,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:44:31,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:44:31,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:44:31,098 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:44:31,099 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:44:31,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2021-10-13 07:44:31,178 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/data/9c4305970/f6f43b22f8ac471fb2c962962c75be2a/FLAG879dad425 [2021-10-13 07:44:31,743 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:44:31,744 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2021-10-13 07:44:31,750 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/data/9c4305970/f6f43b22f8ac471fb2c962962c75be2a/FLAG879dad425 [2021-10-13 07:44:32,101 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/data/9c4305970/f6f43b22f8ac471fb2c962962c75be2a [2021-10-13 07:44:32,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:44:32,110 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:44:32,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:44:32,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:44:32,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:44:32,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:44:32" (1/1) ... [2021-10-13 07:44:32,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5ca11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:32, skipping insertion in model container [2021-10-13 07:44:32,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:44:32" (1/1) ... [2021-10-13 07:44:32,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:44:32,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:44:32,295 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_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2021-10-13 07:44:32,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:44:32,330 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:44:32,345 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_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2021-10-13 07:44:32,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:44:32,372 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:44:32,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:32 WrapperNode [2021-10-13 07:44:32,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:44:32,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:44:32,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:44:32,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:44:32,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:32" (1/1) ... [2021-10-13 07:44:32,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:32" (1/1) ... [2021-10-13 07:44:32,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:44:32,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:44:32,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:44:32,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:44:32,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:32" (1/1) ... [2021-10-13 07:44:32,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:32" (1/1) ... [2021-10-13 07:44:32,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:32" (1/1) ... [2021-10-13 07:44:32,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:32" (1/1) ... [2021-10-13 07:44:32,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:32" (1/1) ... [2021-10-13 07:44:32,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:32" (1/1) ... [2021-10-13 07:44:32,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:32" (1/1) ... [2021-10-13 07:44:32,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:44:32,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:44:32,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:44:32,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:44:32,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:32" (1/1) ... [2021-10-13 07:44:32,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:44:32,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:44:32,534 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:44:32,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:44:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:44:32,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:44:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:44:32,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:44:32,802 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:44:32,802 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 07:44:32,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:44:32 BoogieIcfgContainer [2021-10-13 07:44:32,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:44:32,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:44:32,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:44:32,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:44:32,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:44:32" (1/3) ... [2021-10-13 07:44:32,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1873f36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:44:32, skipping insertion in model container [2021-10-13 07:44:32,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:32" (2/3) ... [2021-10-13 07:44:32,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1873f36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:44:32, skipping insertion in model container [2021-10-13 07:44:32,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:44:32" (3/3) ... [2021-10-13 07:44:32,813 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2021-10-13 07:44:32,818 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:44:32,818 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 07:44:32,866 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:44:32,872 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 07:44:32,873 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 07:44:32,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 19 states have (on average 1.631578947368421) internal successors, (31), 22 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 07:44:32,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:44:32,892 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:32,893 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:44:32,894 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:32,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:32,900 INFO L82 PathProgramCache]: Analyzing trace with hash 889681499, now seen corresponding path program 1 times [2021-10-13 07:44:32,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:44:32,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473297992] [2021-10-13 07:44:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:32,914 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:44:32,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:44:32,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:44:32,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:44:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:32,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:44:32,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:33,100 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 07:44:33,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:33,148 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 07:44:33,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:44:33,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473297992] [2021-10-13 07:44:33,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473297992] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:44:33,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:44:33,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:44:33,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449462276] [2021-10-13 07:44:33,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:44:33,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:44:33,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:44:33,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:44:33,173 INFO L87 Difference]: Start difference. First operand has 23 states, 19 states have (on average 1.631578947368421) internal successors, (31), 22 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) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 07:44:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:33,214 INFO L93 Difference]: Finished difference Result 58 states and 84 transitions. [2021-10-13 07:44:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:44:33,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 07:44:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:33,224 INFO L225 Difference]: With dead ends: 58 [2021-10-13 07:44:33,225 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 07:44:33,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:44:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 07:44:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-10-13 07:44:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-10-13 07:44:33,263 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 6 [2021-10-13 07:44:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:33,263 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-10-13 07:44:33,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 07:44:33,264 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-10-13 07:44:33,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:44:33,265 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:33,265 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:44:33,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:33,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:44:33,477 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:33,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:33,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1810811368, now seen corresponding path program 1 times [2021-10-13 07:44:33,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:44:33,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933884270] [2021-10-13 07:44:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:33,479 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:44:33,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:44:33,481 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:44:33,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:44:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:33,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:44:33,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:33,554 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 07:44:33,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:33,582 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 07:44:33,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:44:33,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933884270] [2021-10-13 07:44:33,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933884270] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:44:33,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:44:33,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:44:33,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163188190] [2021-10-13 07:44:33,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:44:33,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:44:33,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:44:33,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:44:33,594 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:33,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:33,621 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-10-13 07:44:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:44:33,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 07:44:33,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:33,623 INFO L225 Difference]: With dead ends: 64 [2021-10-13 07:44:33,623 INFO L226 Difference]: Without dead ends: 43 [2021-10-13 07:44:33,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:44:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-13 07:44:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-10-13 07:44:33,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 40 states have internal predecessors, (51), 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 07:44:33,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-10-13 07:44:33,635 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 7 [2021-10-13 07:44:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:33,636 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-10-13 07:44:33,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-10-13 07:44:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:44:33,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:33,638 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:44:33,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:33,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:44:33,849 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:33,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:33,851 INFO L82 PathProgramCache]: Analyzing trace with hash 301781204, now seen corresponding path program 1 times [2021-10-13 07:44:33,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:44:33,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302595932] [2021-10-13 07:44:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:33,852 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:44:33,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:44:33,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:44:33,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:44:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:33,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:44:33,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:33,972 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 07:44:33,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:34,017 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 07:44:34,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:44:34,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302595932] [2021-10-13 07:44:34,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302595932] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:44:34,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:44:34,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:44:34,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919179328] [2021-10-13 07:44:34,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:44:34,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:44:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:44:34,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:44:34,026 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:34,052 INFO L93 Difference]: Finished difference Result 85 states and 112 transitions. [2021-10-13 07:44:34,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:44:34,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 07:44:34,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:34,055 INFO L225 Difference]: With dead ends: 85 [2021-10-13 07:44:34,056 INFO L226 Difference]: Without dead ends: 49 [2021-10-13 07:44:34,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:44:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-13 07:44:34,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-10-13 07:44:34,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:34,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-10-13 07:44:34,086 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 8 [2021-10-13 07:44:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:34,086 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-10-13 07:44:34,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-10-13 07:44:34,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:44:34,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:34,088 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:44:34,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:34,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:44:34,299 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:34,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:34,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1992746636, now seen corresponding path program 1 times [2021-10-13 07:44:34,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:44:34,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026503415] [2021-10-13 07:44:34,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:34,302 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:44:34,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:44:34,303 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:44:34,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:44:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:34,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:44:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:34,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:34,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:44:34,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026503415] [2021-10-13 07:44:34,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026503415] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:34,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [949969306] [2021-10-13 07:44:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:34,539 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:44:34,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:44:34,541 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:44:34,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-13 07:44:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:44:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:34,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:34,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [949969306] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:34,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345331857] [2021-10-13 07:44:34,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:34,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:44:34,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:44:34,805 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:44:34,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 07:44:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:34,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:44:34,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:34,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:34,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345331857] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:34,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:44:34,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 13 [2021-10-13 07:44:34,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948868307] [2021-10-13 07:44:34,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 07:44:34,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:44:34,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 07:44:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:44:34,983 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 07:44:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:35,367 INFO L93 Difference]: Finished difference Result 111 states and 150 transitions. [2021-10-13 07:44:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 07:44:35,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 10 [2021-10-13 07:44:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:35,369 INFO L225 Difference]: With dead ends: 111 [2021-10-13 07:44:35,369 INFO L226 Difference]: Without dead ends: 69 [2021-10-13 07:44:35,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-10-13 07:44:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-13 07:44:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-13 07:44:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 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 07:44:35,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2021-10-13 07:44:35,394 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 10 [2021-10-13 07:44:35,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:35,394 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2021-10-13 07:44:35,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 07:44:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2021-10-13 07:44:35,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:44:35,399 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:35,400 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:44:35,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:35,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-10-13 07:44:35,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:36,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:44:36,010 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:36,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:36,011 INFO L82 PathProgramCache]: Analyzing trace with hash -897381063, now seen corresponding path program 2 times [2021-10-13 07:44:36,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:44:36,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057010843] [2021-10-13 07:44:36,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:44:36,012 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:44:36,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:44:36,021 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:44:36,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:44:36,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:44:36,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:44:36,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:44:36,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:36,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:44:36,359 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:44:36,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057010843] [2021-10-13 07:44:36,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057010843] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:36,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1301998221] [2021-10-13 07:44:36,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:44:36,361 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:44:36,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:44:36,370 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:44:36,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-13 07:44:36,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:44:36,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:44:36,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:44:36,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:36,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:44:36,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1301998221] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:36,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489142228] [2021-10-13 07:44:36,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:44:36,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:44:36,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:44:36,711 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:44:36,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 07:44:36,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:44:36,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:44:36,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:44:36,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:44:36,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:44:36,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489142228] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:36,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:44:36,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 11, 7, 11, 7] total 16 [2021-10-13 07:44:36,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75543738] [2021-10-13 07:44:36,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 07:44:36,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:44:36,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 07:44:36,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:44:36,947 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 07:44:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:37,808 INFO L93 Difference]: Finished difference Result 267 states and 333 transitions. [2021-10-13 07:44:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 07:44:37,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 15 [2021-10-13 07:44:37,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:37,811 INFO L225 Difference]: With dead ends: 267 [2021-10-13 07:44:37,811 INFO L226 Difference]: Without dead ends: 210 [2021-10-13 07:44:37,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 569.7ms TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 07:44:37,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-10-13 07:44:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 93. [2021-10-13 07:44:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 92 states have internal predecessors, (115), 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 07:44:37,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2021-10-13 07:44:37,851 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 15 [2021-10-13 07:44:37,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:37,852 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2021-10-13 07:44:37,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 07:44:37,852 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2021-10-13 07:44:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:44:37,853 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:37,853 INFO L512 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:44:37,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:38,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:38,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-13 07:44:38,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:44:38,456 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:38,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:38,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2047343788, now seen corresponding path program 3 times [2021-10-13 07:44:38,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:44:38,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064725316] [2021-10-13 07:44:38,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:44:38,457 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:44:38,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:44:38,457 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:44:38,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:44:38,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 07:44:38,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:44:38,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:44:38,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 07:44:38,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 07:44:38,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:44:38,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064725316] [2021-10-13 07:44:38,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064725316] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:44:38,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:44:38,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:44:38,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966628628] [2021-10-13 07:44:38,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:44:38,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:44:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:44:38,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:44:38,767 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 07:44:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:38,931 INFO L93 Difference]: Finished difference Result 93 states and 115 transitions. [2021-10-13 07:44:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:44:38,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 16 [2021-10-13 07:44:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:38,933 INFO L225 Difference]: With dead ends: 93 [2021-10-13 07:44:38,933 INFO L226 Difference]: Without dead ends: 91 [2021-10-13 07:44:38,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:44:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-13 07:44:38,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2021-10-13 07:44:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 70 states have internal predecessors, (78), 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 07:44:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-10-13 07:44:38,955 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 16 [2021-10-13 07:44:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:38,956 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-10-13 07:44:38,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 07:44:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-10-13 07:44:38,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 07:44:38,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:38,957 INFO L512 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:44:38,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:39,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:44:39,168 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:39,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:39,169 INFO L82 PathProgramCache]: Analyzing trace with hash -438485240, now seen corresponding path program 1 times [2021-10-13 07:44:39,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:44:39,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111793733] [2021-10-13 07:44:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:39,170 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:44:39,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:44:39,171 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:44:39,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:44:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:39,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:44:39,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 83 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-13 07:44:39,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 83 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-13 07:44:39,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:44:39,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111793733] [2021-10-13 07:44:39,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111793733] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:39,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [318251046] [2021-10-13 07:44:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:39,727 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:44:39,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:44:39,730 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:44:39,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 07:44:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:39,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:44:39,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 85 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-13 07:44:40,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 85 proven. 30 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-10-13 07:44:40,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [318251046] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:40,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275686729] [2021-10-13 07:44:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:40,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:44:40,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:44:40,253 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:44:40,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 07:44:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:40,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:44:40,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:44:40,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:40,922 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-13 07:44:40,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275686729] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:40,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:44:40,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12, 7, 5, 6] total 32 [2021-10-13 07:44:40,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354030567] [2021-10-13 07:44:40,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 07:44:40,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:44:40,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 07:44:40,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-10-13 07:44:40,925 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:46,979 INFO L93 Difference]: Finished difference Result 365 states and 526 transitions. [2021-10-13 07:44:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-10-13 07:44:46,980 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 07:44:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:46,984 INFO L225 Difference]: With dead ends: 365 [2021-10-13 07:44:46,984 INFO L226 Difference]: Without dead ends: 307 [2021-10-13 07:44:46,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7575 ImplicationChecksByTransitivity, 5585.3ms TimeCoverageRelationStatistics Valid=2732, Invalid=20830, Unknown=0, NotChecked=0, Total=23562 [2021-10-13 07:44:46,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-10-13 07:44:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-10-13 07:44:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 305 states have (on average 1.0557377049180328) internal successors, (322), 306 states have internal predecessors, (322), 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 07:44:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 322 transitions. [2021-10-13 07:44:47,123 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 322 transitions. Word has length 33 [2021-10-13 07:44:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:47,124 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 322 transitions. [2021-10-13 07:44:47,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 322 transitions. [2021-10-13 07:44:47,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-13 07:44:47,135 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:47,136 INFO L512 BasicCegarLoop]: trace histogram [114, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:44:47,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:47,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-13 07:44:47,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-10-13 07:44:47,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:44:47,737 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:47,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:47,737 INFO L82 PathProgramCache]: Analyzing trace with hash -329577836, now seen corresponding path program 2 times [2021-10-13 07:44:47,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:44:47,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370988063] [2021-10-13 07:44:47,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:44:47,738 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:44:47,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:44:47,742 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:44:47,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 07:44:47,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:44:47,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:44:47,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:44:47,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 2006 proven. 190 refuted. 0 times theorem prover too weak. 5010 trivial. 0 not checked. [2021-10-13 07:44:48,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 2006 proven. 190 refuted. 0 times theorem prover too weak. 5010 trivial. 0 not checked. [2021-10-13 07:44:49,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:44:49,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370988063] [2021-10-13 07:44:49,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370988063] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:49,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [876345855] [2021-10-13 07:44:49,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:44:49,578 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:44:49,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:44:49,581 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:44:49,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-13 07:44:50,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:44:50,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:44:50,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:44:50,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 2006 proven. 190 refuted. 0 times theorem prover too weak. 5010 trivial. 0 not checked. [2021-10-13 07:44:50,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 2006 proven. 190 refuted. 0 times theorem prover too weak. 5010 trivial. 0 not checked. [2021-10-13 07:44:51,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [876345855] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:51,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317128328] [2021-10-13 07:44:51,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:44:51,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:44:51,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:44:51,025 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:44:51,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 07:44:51,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:44:51,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:44:51,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:44:51,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 0 proven. 6066 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2021-10-13 07:44:52,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 2021 proven. 0 refuted. 0 times theorem prover too weak. 5185 trivial. 0 not checked. [2021-10-13 07:44:52,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317128328] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:44:52,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 07:44:52,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [22, 22, 22, 22, 9] total 53 [2021-10-13 07:44:52,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308158398] [2021-10-13 07:44:52,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:44:52,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:44:52,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:44:52,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=2235, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 07:44:52,971 INFO L87 Difference]: Start difference. First operand 307 states and 322 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:44:53,312 INFO L93 Difference]: Finished difference Result 307 states and 322 transitions. [2021-10-13 07:44:53,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:44:53,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-10-13 07:44:53,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:44:53,318 INFO L225 Difference]: With dead ends: 307 [2021-10-13 07:44:53,319 INFO L226 Difference]: Without dead ends: 305 [2021-10-13 07:44:53,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 849 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1599.8ms TimeCoverageRelationStatistics Valid=549, Invalid=2643, Unknown=0, NotChecked=0, Total=3192 [2021-10-13 07:44:53,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-10-13 07:44:53,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-10-13 07:44:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.049342105263158) internal successors, (319), 304 states have internal predecessors, (319), 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 07:44:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 319 transitions. [2021-10-13 07:44:53,416 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 319 transitions. Word has length 151 [2021-10-13 07:44:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:44:53,418 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 319 transitions. [2021-10-13 07:44:53,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:44:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 319 transitions. [2021-10-13 07:44:53,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-10-13 07:44:53,426 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:44:53,426 INFO L512 BasicCegarLoop]: trace histogram [228, 12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 07:44:53,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:53,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:53,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:44:54,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:44:54,040 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:44:54,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:44:54,040 INFO L82 PathProgramCache]: Analyzing trace with hash 314864027, now seen corresponding path program 1 times [2021-10-13 07:44:54,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:44:54,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943448090] [2021-10-13 07:44:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:54,042 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:44:54,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:44:54,043 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:44:54,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 07:44:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:54,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:44:54,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 28975 backedges. 4415 proven. 190 refuted. 0 times theorem prover too weak. 24370 trivial. 0 not checked. [2021-10-13 07:44:55,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 28975 backedges. 4415 proven. 190 refuted. 0 times theorem prover too weak. 24370 trivial. 0 not checked. [2021-10-13 07:44:56,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:44:56,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943448090] [2021-10-13 07:44:56,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943448090] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:56,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [663392685] [2021-10-13 07:44:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:56,776 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:44:56,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:44:56,800 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:44:56,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-13 07:44:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:44:57,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:44:57,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:44:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 28975 backedges. 14561 proven. 6066 refuted. 0 times theorem prover too weak. 8348 trivial. 0 not checked. [2021-10-13 07:44:58,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 28975 backedges. 14561 proven. 3639 refuted. 0 times theorem prover too weak. 10775 trivial. 0 not checked. [2021-10-13 07:44:59,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [663392685] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:44:59,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701206555] [2021-10-13 07:44:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:44:59,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:44:59,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:44:59,604 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:44:59,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 07:45:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:00,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:45:00,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 28975 backedges. 14561 proven. 6066 refuted. 0 times theorem prover too weak. 8348 trivial. 0 not checked. [2021-10-13 07:45:01,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 28975 backedges. 14561 proven. 3639 refuted. 0 times theorem prover too weak. 10775 trivial. 0 not checked. [2021-10-13 07:45:02,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701206555] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:45:02,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:45:02,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 10, 5, 10, 5] total 52 [2021-10-13 07:45:02,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875993117] [2021-10-13 07:45:02,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-13 07:45:02,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:45:02,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-13 07:45:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=2144, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 07:45:02,098 INFO L87 Difference]: Start difference. First operand 305 states and 319 transitions. Second operand has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 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 07:45:31,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:45:31,958 INFO L93 Difference]: Finished difference Result 1164 states and 1309 transitions. [2021-10-13 07:45:31,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 373 states. [2021-10-13 07:45:31,959 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 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 304 [2021-10-13 07:45:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:45:31,964 INFO L225 Difference]: With dead ends: 1164 [2021-10-13 07:45:31,964 INFO L226 Difference]: Without dead ends: 879 [2021-10-13 07:45:31,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2181 GetRequests, 1763 SyntacticMatches, 6 SemanticMatches, 412 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65668 ImplicationChecksByTransitivity, 28413.5ms TimeCoverageRelationStatistics Valid=17266, Invalid=153716, Unknown=0, NotChecked=0, Total=170982 [2021-10-13 07:45:31,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-10-13 07:45:32,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 689. [2021-10-13 07:45:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 1.0247093023255813) internal successors, (705), 688 states have internal predecessors, (705), 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 07:45:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 705 transitions. [2021-10-13 07:45:32,197 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 705 transitions. Word has length 304 [2021-10-13 07:45:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:45:32,198 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 705 transitions. [2021-10-13 07:45:32,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 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 07:45:32,198 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 705 transitions. [2021-10-13 07:45:32,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2021-10-13 07:45:32,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:45:32,217 INFO L512 BasicCegarLoop]: trace histogram [602, 14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 07:45:32,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-13 07:45:32,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:45:32,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-13 07:45:32,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:45:32,831 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:45:32,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:45:32,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1033821403, now seen corresponding path program 2 times [2021-10-13 07:45:32,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:45:32,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80080497] [2021-10-13 07:45:32,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:45:32,834 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:45:32,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:45:32,849 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:45:32,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 07:45:34,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:45:34,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:45:34,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-13 07:45:34,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 189819 backedges. 25185 proven. 946 refuted. 0 times theorem prover too weak. 163688 trivial. 0 not checked. [2021-10-13 07:45:36,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 189819 backedges. 25185 proven. 946 refuted. 0 times theorem prover too weak. 163688 trivial. 0 not checked. [2021-10-13 07:45:40,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:45:40,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80080497] [2021-10-13 07:45:40,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80080497] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:45:40,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [730527851] [2021-10-13 07:45:40,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:45:40,266 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:45:40,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:45:40,266 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:45:40,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-13 07:45:43,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:45:43,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:45:43,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-13 07:45:43,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 189819 backedges. 25185 proven. 946 refuted. 0 times theorem prover too weak. 163688 trivial. 0 not checked. [2021-10-13 07:45:44,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 189819 backedges. 25185 proven. 946 refuted. 0 times theorem prover too weak. 163688 trivial. 0 not checked. [2021-10-13 07:45:46,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [730527851] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:45:46,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567007607] [2021-10-13 07:45:46,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:45:46,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:45:46,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:45:46,133 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:45:46,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 07:45:48,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:45:48,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:45:48,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:45:48,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 189819 backedges. 0 proven. 95081 refuted. 0 times theorem prover too weak. 94738 trivial. 0 not checked. [2021-10-13 07:45:50,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 189819 backedges. 95080 proven. 0 refuted. 0 times theorem prover too weak. 94739 trivial. 0 not checked. [2021-10-13 07:45:53,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567007607] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:45:53,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 07:45:53,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [46, 46, 46, 46, 5] total 97 [2021-10-13 07:45:53,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499136076] [2021-10-13 07:45:53,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:45:53,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:45:53,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:45:53,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2135, Invalid=7177, Unknown=0, NotChecked=0, Total=9312 [2021-10-13 07:45:53,416 INFO L87 Difference]: Start difference. First operand 689 states and 705 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 07:45:53,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:45:53,911 INFO L93 Difference]: Finished difference Result 689 states and 705 transitions. [2021-10-13 07:45:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:45:53,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 688 [2021-10-13 07:45:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:45:53,913 INFO L225 Difference]: With dead ends: 689 [2021-10-13 07:45:53,913 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:45:53,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4126 GetRequests, 4027 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 4411.6ms TimeCoverageRelationStatistics Valid=2159, Invalid=7941, Unknown=0, NotChecked=0, Total=10100 [2021-10-13 07:45:53,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:45:53,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:45:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 07:45:53,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:45:53,915 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 688 [2021-10-13 07:45:53,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:45:53,915 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:45:53,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 07:45:53,915 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:45:53,915 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:45:53,917 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:45:53,918 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:45:53,918 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:45:53,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 07:45:54,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-10-13 07:45:54,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-13 07:45:54,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:45:54,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:45:54,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:45:54,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:45:54,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:46:07,203 WARN L207 SmtUtils]: Spent 12.38 s on a formula simplification. DAG size of input: 1376 DAG size of output: 1234 [2021-10-13 07:46:07,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:46:07,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:46:07,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:46:07,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:46:19,337 WARN L207 SmtUtils]: Spent 11.61 s on a formula simplification. DAG size of input: 1179 DAG size of output: 30 [2021-10-13 07:46:19,719 INFO L853 garLoopResultBuilder]: At program point L6-5(lines 5 10) the Hoare annotation is: (let ((.cse0 (bvadd ULTIMATE.start_main_~y~0 (_ bv1 32)))) (and (bvult (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~z~0) (_ bv268435455 32)) (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (or (bvult (bvadd (_ bv2 32) ULTIMATE.start_main_~y~0) (_ bv268435455 32)) (not (bvult .cse0 (_ bv268435455 32)))) (not (bvult ULTIMATE.start_main_~z~0 (_ bv268435455 32))) (= (bvurem .cse0 (_ bv2 32)) (_ bv0 32)) (bvult ULTIMATE.start_main_~x~0 (_ bv268435455 32)))) [2021-10-13 07:46:19,720 INFO L857 garLoopResultBuilder]: For program point L6-6(lines 6 8) no Hoare annotation was computed. [2021-10-13 07:46:19,720 INFO L860 garLoopResultBuilder]: At program point L6-8(lines 5 10) the Hoare annotation is: true [2021-10-13 07:46:19,720 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-13 07:46:19,720 INFO L853 garLoopResultBuilder]: At program point L19-2(lines 19 33) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~y~0 (_ bv0 32)) (= ULTIMATE.start_main_~z~0 (_ bv0 32)) (= ULTIMATE.start_main_~x~0 (_ bv0 32))) (let ((.cse0 (bvadd ULTIMATE.start_main_~y~0 (_ bv1 32)))) (and (bvult (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~z~0) (_ bv268435455 32)) (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (or (bvult (bvadd (_ bv2 32) ULTIMATE.start_main_~y~0) (_ bv268435455 32)) (not (bvult .cse0 (_ bv268435455 32)))) (or (not (= (bvurem ULTIMATE.start_main_~x~0 (_ bv2 32)) (_ bv0 32))) (bvult ULTIMATE.start_main_~x~0 (_ bv268435455 32))) (not (bvult ULTIMATE.start_main_~z~0 (_ bv268435455 32))) (= (bvurem .cse0 (_ bv2 32)) (_ bv0 32))))) [2021-10-13 07:46:19,720 INFO L857 garLoopResultBuilder]: For program point L19-3(lines 19 33) no Hoare annotation was computed. [2021-10-13 07:46:19,720 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-13 07:46:19,720 INFO L857 garLoopResultBuilder]: For program point L7-1(line 7) no Hoare annotation was computed. [2021-10-13 07:46:19,720 INFO L857 garLoopResultBuilder]: For program point L7-2(line 7) no Hoare annotation was computed. [2021-10-13 07:46:19,720 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 07:46:19,721 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:46:19,721 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 07:46:19,721 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-13 07:46:19,721 INFO L853 garLoopResultBuilder]: At program point L24-2(lines 24 26) the Hoare annotation is: (let ((.cse2 (= ULTIMATE.start_main_~x~0 (_ bv0 32))) (.cse0 (bvult (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~z~0) (_ bv268435455 32))) (.cse6 (bvult ULTIMATE.start_main_~y~0 (_ bv268435455 32))) (.cse7 (exists ((ULTIMATE.start_main_~z~0 (_ BitVec 32))) (and (bvult (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~z~0) (_ bv268435455 32)) (= ULTIMATE.start___VERIFIER_assert_~cond (bvurem ULTIMATE.start_main_~z~0 (_ bv4 32))) (not (bvult ULTIMATE.start_main_~z~0 (_ bv268435455 32)))))) (.cse1 (= ULTIMATE.start_main_~y~0 (_ bv0 32))) (.cse5 (= ULTIMATE.start_main_~z~0 (_ bv0 32))) (.cse3 (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)))) (.cse4 (bvult ULTIMATE.start_main_~x~0 (_ bv268435455 32)))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse1 .cse3 .cse4) (and .cse1 .cse5 .cse2) (and .cse0 .cse6 .cse7 .cse4) (and .cse5 .cse6 .cse7 .cse4) (and .cse1 .cse5 .cse3 .cse4))) [2021-10-13 07:46:19,721 INFO L857 garLoopResultBuilder]: For program point L24-3(lines 24 26) no Hoare annotation was computed. [2021-10-13 07:46:19,721 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:46:19,721 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-13 07:46:19,722 INFO L853 garLoopResultBuilder]: At program point L22-2(lines 22 29) the Hoare annotation is: (let ((.cse0 (bvult (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~z~0) (_ bv268435455 32))) (.cse3 (= ULTIMATE.start_main_~y~0 (_ bv0 32))) (.cse1 (not (bvult ULTIMATE.start_main_~z~0 (_ bv268435455 32)))) (.cse2 (bvult ULTIMATE.start_main_~x~0 (_ bv268435455 32)))) (or (and .cse0 (or (bvult ULTIMATE.start_main_~y~0 (_ bv268435455 32)) (not (= (bvurem ULTIMATE.start_main_~y~0 (_ bv2 32)) (_ bv0 32)))) .cse1 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv3 32)) .cse2) (and .cse3 (= ULTIMATE.start_main_~z~0 (_ bv0 32)) (= ULTIMATE.start_main_~x~0 (_ bv0 32))) (and .cse0 .cse3 (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) .cse1 .cse2))) [2021-10-13 07:46:19,722 INFO L857 garLoopResultBuilder]: For program point L22-3(lines 22 29) no Hoare annotation was computed. [2021-10-13 07:46:19,722 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-10-13 07:46:19,722 INFO L853 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: (and (bvult (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~z~0) (_ bv268435455 32)) (bvult ULTIMATE.start_main_~y~0 (_ bv268435455 32)) (not (bvult ULTIMATE.start_main_~z~0 (_ bv268435455 32))) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv3 32)) (bvult ULTIMATE.start_main_~x~0 (_ bv268435455 32))) [2021-10-13 07:46:19,722 INFO L857 garLoopResultBuilder]: For program point L6-3(lines 6 8) no Hoare annotation was computed. [2021-10-13 07:46:19,722 INFO L860 garLoopResultBuilder]: At program point L35(lines 12 37) the Hoare annotation is: true [2021-10-13 07:46:19,726 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:46:19,742 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,743 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,744 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,744 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,744 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,744 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,748 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,748 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,748 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,749 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,749 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,749 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:46:19 BoogieIcfgContainer [2021-10-13 07:46:19,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:46:19,757 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:46:19,757 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:46:19,758 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:46:19,758 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:44:32" (3/4) ... [2021-10-13 07:46:19,761 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:46:19,771 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-13 07:46:19,772 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:46:19,772 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:46:19,772 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:46:19,797 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && y == 0bv32) && x == 0bv32) || (((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && y == 0bv32) && !(cond == 0bv32)) && ~bvult32(x, 268435455bv32))) || ((y == 0bv32 && z == 0bv32) && x == 0bv32)) || (((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && ~bvult32(y, 268435455bv32)) && (\exists ULTIMATE.start_main_~z~0 : bv32 :: (~bvult32(~bvadd64(4294967295bv32, ULTIMATE.start_main_~z~0), 268435455bv32) && cond == ~bvurem32(ULTIMATE.start_main_~z~0, 4bv32)) && !~bvult32(ULTIMATE.start_main_~z~0, 268435455bv32))) && ~bvult32(x, 268435455bv32))) || (((z == 0bv32 && ~bvult32(y, 268435455bv32)) && (\exists ULTIMATE.start_main_~z~0 : bv32 :: (~bvult32(~bvadd64(4294967295bv32, ULTIMATE.start_main_~z~0), 268435455bv32) && cond == ~bvurem32(ULTIMATE.start_main_~z~0, 4bv32)) && !~bvult32(ULTIMATE.start_main_~z~0, 268435455bv32))) && ~bvult32(x, 268435455bv32))) || (((y == 0bv32 && z == 0bv32) && !(cond == 0bv32)) && ~bvult32(x, 268435455bv32)) [2021-10-13 07:46:19,807 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:46:19,807 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:46:19,808 INFO L168 Benchmark]: Toolchain (without parser) took 107698.04 ms. Allocated memory was 71.3 MB in the beginning and 2.4 GB in the end (delta: 2.3 GB). Free memory was 52.3 MB in the beginning and 1.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 900.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:46:19,809 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 71.3 MB. Free memory was 50.8 MB in the beginning and 50.8 MB in the end (delta: 55.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:46:19,809 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.05 ms. Allocated memory is still 71.3 MB. Free memory was 52.2 MB in the beginning and 42.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:46:19,810 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.42 ms. Allocated memory is still 71.3 MB. Free memory was 42.4 MB in the beginning and 53.8 MB in the end (delta: -11.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:46:19,810 INFO L168 Benchmark]: Boogie Preprocessor took 37.85 ms. Allocated memory is still 71.3 MB. Free memory was 53.8 MB in the beginning and 52.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:46:19,810 INFO L168 Benchmark]: RCFGBuilder took 299.75 ms. Allocated memory is still 71.3 MB. Free memory was 52.7 MB in the beginning and 42.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:46:19,811 INFO L168 Benchmark]: TraceAbstraction took 106950.68 ms. Allocated memory was 71.3 MB in the beginning and 2.4 GB in the end (delta: 2.3 GB). Free memory was 42.2 MB in the beginning and 1.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 893.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:46:19,811 INFO L168 Benchmark]: Witness Printer took 50.15 ms. Allocated memory is still 2.4 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:46:19,813 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 71.3 MB. Free memory was 50.8 MB in the beginning and 50.8 MB in the end (delta: 55.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 262.05 ms. Allocated memory is still 71.3 MB. Free memory was 52.2 MB in the beginning and 42.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 88.42 ms. Allocated memory is still 71.3 MB. Free memory was 42.4 MB in the beginning and 53.8 MB in the end (delta: -11.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.85 ms. Allocated memory is still 71.3 MB. Free memory was 53.8 MB in the beginning and 52.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 299.75 ms. Allocated memory is still 71.3 MB. Free memory was 52.7 MB in the beginning and 42.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 106950.68 ms. Allocated memory was 71.3 MB in the beginning and 2.4 GB in the end (delta: 2.3 GB). Free memory was 42.2 MB in the beginning and 1.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 893.6 MB. Max. memory is 16.1 GB. * Witness Printer took 50.15 ms. Allocated memory is still 2.4 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] * 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 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 106861.6ms, OverallIterations: 10, TraceHistogramMax: 602, EmptinessCheckTime: 54.1ms, AutomataDifference: 38345.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 25197.2ms, InitialAbstractionConstructionTime: 9.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 240 SDtfs, 473 SDslu, 1513 SDs, 0 SdLazy, 6254 SolverSat, 934 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3305.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7780 GetRequests, 6970 SyntacticMatches, 11 SemanticMatches, 799 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74210 ImplicationChecksByTransitivity, 41083.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=689occurred in iteration=9, InterpolantAutomatonStates: 589, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 579.9ms AutomataMinimizationTime, 10 MinimizatonAttempts, 333 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 660 NumberOfFragments, 275 HoareAnnotationTreeSize, 7 FomulaSimplifications, 130294 FormulaSimplificationTreeSizeReduction, 12745.9ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 165495 FormulaSimplificationTreeSizeReductionInter, 12430.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 589.9ms SsaConstructionTime, 3759.8ms SatisfiabilityAnalysisTime, 26820.9ms InterpolantComputationTime, 3640 NumberOfCodeBlocks, 3634 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 7236 ConstructedInterpolants, 1 QuantifiedInterpolants, 17342 SizeOfPredicates, 33 NumberOfNonLiveVariables, 7322 ConjunctsInSsa, 283 ConjunctsInUnsatCore, 44 InterpolantComputations, 10 PerfectInterpolantSequences, 1231245/1357212 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 - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: ((y == 0bv32 && z == 0bv32) && x == 0bv32) || (((((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && !(cond == 0bv32)) && (~bvult32(~bvadd64(2bv32, y), 268435455bv32) || !~bvult32(~bvadd64(y, 1bv32), 268435455bv32))) && (!(~bvurem32(x, 2bv32) == 0bv32) || ~bvult32(x, 268435455bv32))) && !~bvult32(z, 268435455bv32)) && ~bvurem32(~bvadd64(y, 1bv32), 2bv32) == 0bv32) - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: (((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && ~bvult32(y, 268435455bv32)) && !~bvult32(z, 268435455bv32)) && cond == 3bv32) && ~bvult32(x, 268435455bv32) - InvariantResult [Line: 24]: Loop Invariant [2021-10-13 07:46:19,824 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,824 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,824 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,825 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,825 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,825 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,826 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,827 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,827 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,827 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,827 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] [2021-10-13 07:46:19,827 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~z~0,QUANTIFIED] Derived loop invariant: ((((((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && y == 0bv32) && x == 0bv32) || (((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && y == 0bv32) && !(cond == 0bv32)) && ~bvult32(x, 268435455bv32))) || ((y == 0bv32 && z == 0bv32) && x == 0bv32)) || (((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && ~bvult32(y, 268435455bv32)) && (\exists ULTIMATE.start_main_~z~0 : bv32 :: (~bvult32(~bvadd64(4294967295bv32, ULTIMATE.start_main_~z~0), 268435455bv32) && cond == ~bvurem32(ULTIMATE.start_main_~z~0, 4bv32)) && !~bvult32(ULTIMATE.start_main_~z~0, 268435455bv32))) && ~bvult32(x, 268435455bv32))) || (((z == 0bv32 && ~bvult32(y, 268435455bv32)) && (\exists ULTIMATE.start_main_~z~0 : bv32 :: (~bvult32(~bvadd64(4294967295bv32, ULTIMATE.start_main_~z~0), 268435455bv32) && cond == ~bvurem32(ULTIMATE.start_main_~z~0, 4bv32)) && !~bvult32(ULTIMATE.start_main_~z~0, 268435455bv32))) && ~bvult32(x, 268435455bv32))) || (((y == 0bv32 && z == 0bv32) && !(cond == 0bv32)) && ~bvult32(x, 268435455bv32)) - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: ((((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && !(cond == 0bv32)) && (~bvult32(~bvadd64(2bv32, y), 268435455bv32) || !~bvult32(~bvadd64(y, 1bv32), 268435455bv32))) && !~bvult32(z, 268435455bv32)) && ~bvurem32(~bvadd64(y, 1bv32), 2bv32) == 0bv32) && ~bvult32(x, 268435455bv32) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && (~bvult32(y, 268435455bv32) || !(~bvurem32(y, 2bv32) == 0bv32))) && !~bvult32(z, 268435455bv32)) && cond == 3bv32) && ~bvult32(x, 268435455bv32)) || ((y == 0bv32 && z == 0bv32) && x == 0bv32)) || ((((~bvult32(~bvadd64(4294967295bv32, z), 268435455bv32) && y == 0bv32) && !(cond == 0bv32)) && !~bvult32(z, 268435455bv32)) && ~bvult32(x, 268435455bv32)) - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-13 07:46:19,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f2c8d64-5652-45f2-a650-7fe4c72cc66d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...