./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/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_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/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_7da48247-ef4b-419b-9f8d-11a86768bb32/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 409f93cc3fb27e0335e986593862ddeb482b815c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/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_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/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_7da48247-ef4b-419b-9f8d-11a86768bb32/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 409f93cc3fb27e0335e986593862ddeb482b815c .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:18:16,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:18:16,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:18:16,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:18:16,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:18:16,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:18:16,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:18:16,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:18:16,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:18:16,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:18:16,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:18:16,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:18:16,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:18:16,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:18:16,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:18:16,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:18:16,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:18:16,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:18:16,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:18:16,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:18:16,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:18:16,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:18:16,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:18:16,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:18:16,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:18:16,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:18:16,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:18:16,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:18:16,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:18:16,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:18:16,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:18:16,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:18:16,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:18:16,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:18:16,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:18:16,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:18:16,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:18:16,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:18:16,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:18:16,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:18:16,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:18:16,466 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:18:16,513 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:18:16,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:18:16,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:18:16,515 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:18:16,515 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:18:16,515 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:18:16,515 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:18:16,516 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:18:16,516 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:18:16,516 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:18:16,516 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:18:16,516 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:18:16,517 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:18:16,517 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:18:16,517 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:18:16,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:18:16,518 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:18:16,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:18:16,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:18:16,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:18:16,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:18:16,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:18:16,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:18:16,520 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:18:16,520 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:18:16,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:18:16,521 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:18:16,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:18:16,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:18:16,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:18:16,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:18:16,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:18:16,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:18:16,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:18:16,523 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:18:16,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:18:16,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:18:16,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:18:16,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:18:16,524 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_7da48247-ef4b-419b-9f8d-11a86768bb32/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 409f93cc3fb27e0335e986593862ddeb482b815c [2021-10-13 07:18:16,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:18:16,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:18:16,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:18:16,807 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:18:16,809 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:18:16,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/bitvector/byte_add-1.i [2021-10-13 07:18:16,883 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/data/a16ddd5b8/85f34385166546faa1023af1f0289f92/FLAG9b86d5822 [2021-10-13 07:18:17,342 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:18:17,345 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/sv-benchmarks/c/bitvector/byte_add-1.i [2021-10-13 07:18:17,352 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/data/a16ddd5b8/85f34385166546faa1023af1f0289f92/FLAG9b86d5822 [2021-10-13 07:18:17,689 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/data/a16ddd5b8/85f34385166546faa1023af1f0289f92 [2021-10-13 07:18:17,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:18:17,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:18:17,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:18:17,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:18:17,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:18:17,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:18:17" (1/1) ... [2021-10-13 07:18:17,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1498bf46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:17, skipping insertion in model container [2021-10-13 07:18:17,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:18:17" (1/1) ... [2021-10-13 07:18:17,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:18:17,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:18:17,921 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_7da48247-ef4b-419b-9f8d-11a86768bb32/sv-benchmarks/c/bitvector/byte_add-1.i[861,874] [2021-10-13 07:18:17,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:18:17,981 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:18:17,991 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_7da48247-ef4b-419b-9f8d-11a86768bb32/sv-benchmarks/c/bitvector/byte_add-1.i[861,874] [2021-10-13 07:18:18,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:18:18,049 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:18:18,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:18 WrapperNode [2021-10-13 07:18:18,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:18:18,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:18:18,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:18:18,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:18:18,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:18" (1/1) ... [2021-10-13 07:18:18,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:18" (1/1) ... [2021-10-13 07:18:18,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:18:18,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:18:18,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:18:18,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:18:18,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:18" (1/1) ... [2021-10-13 07:18:18,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:18" (1/1) ... [2021-10-13 07:18:18,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:18" (1/1) ... [2021-10-13 07:18:18,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:18" (1/1) ... [2021-10-13 07:18:18,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:18" (1/1) ... [2021-10-13 07:18:18,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:18" (1/1) ... [2021-10-13 07:18:18,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:18" (1/1) ... [2021-10-13 07:18:18,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:18:18,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:18:18,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:18:18,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:18:18,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:18" (1/1) ... [2021-10-13 07:18:18,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:18:18,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:18:18,237 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:18:18,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:18:18,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:18:18,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:18:18,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:18:18,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:18:19,242 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:18:19,242 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 07:18:19,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:19 BoogieIcfgContainer [2021-10-13 07:18:19,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:18:19,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:18:19,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:18:19,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:18:19,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:18:17" (1/3) ... [2021-10-13 07:18:19,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c6046b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:18:19, skipping insertion in model container [2021-10-13 07:18:19,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:18" (2/3) ... [2021-10-13 07:18:19,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c6046b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:18:19, skipping insertion in model container [2021-10-13 07:18:19,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:19" (3/3) ... [2021-10-13 07:18:19,254 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2021-10-13 07:18:19,259 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:18:19,259 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:18:19,306 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:18:19,312 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 07:18:19,313 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:18:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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 07:18:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:18:19,330 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:19,331 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:18:19,332 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:19,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:19,337 INFO L82 PathProgramCache]: Analyzing trace with hash 272577235, now seen corresponding path program 1 times [2021-10-13 07:18:19,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:18:19,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848227150] [2021-10-13 07:18:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:19,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:18:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:19,554 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 07:18:19,555 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:18:19,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848227150] [2021-10-13 07:18:19,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848227150] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:18:19,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:18:19,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:18:19,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069813065] [2021-10-13 07:18:19,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:18:19,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:18:19,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:18:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:18:19,579 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:18:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:19,610 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-10-13 07:18:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:18:19,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:18:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:19,620 INFO L225 Difference]: With dead ends: 15 [2021-10-13 07:18:19,620 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 07:18:19,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:18:19,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 07:18:19,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 07:18:19,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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 07:18:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2021-10-13 07:18:19,651 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2021-10-13 07:18:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:19,652 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-10-13 07:18:19,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:18:19,652 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2021-10-13 07:18:19,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:18:19,653 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:19,653 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:18:19,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:18:19,654 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:19,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:19,655 INFO L82 PathProgramCache]: Analyzing trace with hash -139608693, now seen corresponding path program 1 times [2021-10-13 07:18:19,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:18:19,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966611005] [2021-10-13 07:18:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:19,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:18:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:19,848 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 07:18:19,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:18:19,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966611005] [2021-10-13 07:18:19,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966611005] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:18:19,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680104652] [2021-10-13 07:18:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:19,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:18:19,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:18:19,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:18:19,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:18:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:19,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:18:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:20,014 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 07:18:20,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:20,084 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 07:18:20,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680104652] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:20,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500846714] [2021-10-13 07:18:20,120 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-13 07:18:20,122 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:18:20,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:18:20,132 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:18:20,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:18:20,182 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,193 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:18:20,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 07:18:20,212 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:18:20,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,215 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:18:20,232 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-10-13 07:18:20,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:20,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:20,398 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:20,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:20,401 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,407 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:20,411 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,412 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:20,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:20,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:20,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:20,522 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:20,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:20,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,527 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:20,528 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,528 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:20,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:20,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:20,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:20,623 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:20,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:20,625 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:20,628 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,628 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:20,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:20,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:20,720 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:20,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:20,722 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,724 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:20,725 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,726 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:20,726 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:20,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:20,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:20,801 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:20,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:20,802 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:20,806 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,806 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:20,806 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:20,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:20,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:20,874 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:20,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:20,876 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:20,879 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:20,879 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:20,880 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:20,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:20,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:21,088 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:21,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:21,089 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,093 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:21,094 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,094 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:21,094 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:21,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:21,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:21,202 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:21,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:21,204 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,206 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:21,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:21,207 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:21,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:21,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:21,266 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:21,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:21,268 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,272 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:21,273 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,275 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:21,275 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:21,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:21,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:21,388 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:21,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:21,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,391 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:21,393 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,393 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:21,393 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:21,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:21,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:21,813 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:21,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:21,815 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:21,821 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:21,822 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:21,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:21,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:21,877 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:21,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:21,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,883 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:21,884 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:21,884 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:21,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:21,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:21,949 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:21,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:21,950 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,953 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:21,955 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:21,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:21,956 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:22,022 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:22,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:22,024 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:22,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:22,028 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:22,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:22,029 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:22,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:22,186 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:22,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:22,187 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:22,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:22,192 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:22,198 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:22,198 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:22,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:22,249 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:18:22,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:18:22,252 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:22,253 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:22,254 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:22,255 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:18:22,255 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-10-13 07:18:22,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:18:22,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:22,601 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:22,659 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2529 [2021-10-13 07:18:22,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-10-13 07:18:22,663 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:2721, output treesize:2529 [2021-10-13 07:18:22,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 07:18:22,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:18:22,878 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_20| 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 07:18:22,881 INFO L168 Benchmark]: Toolchain (without parser) took 5172.75 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 98.1 MB in the beginning and 76.4 MB in the end (delta: 21.7 MB). Peak memory consumption was 59.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:18:22,882 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory was 44.4 MB in the beginning and 44.3 MB in the end (delta: 36.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:18:22,882 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.35 ms. Allocated memory is still 132.1 MB. Free memory was 97.9 MB in the beginning and 106.3 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:18:22,883 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.78 ms. Allocated memory is still 132.1 MB. Free memory was 106.3 MB in the beginning and 104.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:18:22,883 INFO L168 Benchmark]: Boogie Preprocessor took 68.58 ms. Allocated memory is still 132.1 MB. Free memory was 104.3 MB in the beginning and 103.6 MB in the end (delta: 730.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:18:22,884 INFO L168 Benchmark]: RCFGBuilder took 1052.35 ms. Allocated memory is still 132.1 MB. Free memory was 102.9 MB in the beginning and 66.5 MB in the end (delta: 36.3 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:18:22,884 INFO L168 Benchmark]: TraceAbstraction took 3633.59 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 66.5 MB in the beginning and 76.4 MB in the end (delta: -9.8 MB). Peak memory consumption was 30.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:18:22,887 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory was 44.4 MB in the beginning and 44.3 MB in the end (delta: 36.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 340.35 ms. Allocated memory is still 132.1 MB. Free memory was 97.9 MB in the beginning and 106.3 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 71.78 ms. Allocated memory is still 132.1 MB. Free memory was 106.3 MB in the beginning and 104.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.58 ms. Allocated memory is still 132.1 MB. Free memory was 104.3 MB in the beginning and 103.6 MB in the end (delta: 730.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1052.35 ms. Allocated memory is still 132.1 MB. Free memory was 102.9 MB in the beginning and 66.5 MB in the end (delta: 36.3 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3633.59 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 66.5 MB in the beginning and 76.4 MB in the end (delta: -9.8 MB). Peak memory consumption was 30.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_20| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_20|: 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 07:18:22,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:18:25,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:18:25,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:18:25,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:18:25,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:18:25,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:18:25,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:18:25,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:18:25,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:18:25,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:18:25,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:18:25,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:18:25,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:18:25,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:18:25,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:18:25,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:18:25,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:18:25,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:18:25,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:18:25,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:18:25,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:18:25,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:18:25,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:18:25,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:18:25,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:18:25,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:18:25,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:18:25,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:18:25,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:18:25,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:18:25,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:18:25,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:18:25,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:18:25,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:18:25,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:18:25,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:18:25,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:18:25,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:18:25,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:18:25,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:18:25,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:18:25,404 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:18:25,448 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:18:25,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:18:25,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:18:25,450 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:18:25,450 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:18:25,450 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:18:25,450 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:18:25,451 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:18:25,451 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:18:25,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:18:25,453 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:18:25,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:18:25,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:18:25,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:18:25,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:18:25,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:18:25,454 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:18:25,454 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:18:25,454 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:18:25,455 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:18:25,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:18:25,455 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:18:25,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:18:25,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:18:25,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:18:25,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:18:25,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:18:25,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:18:25,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:18:25,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:18:25,456 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:18:25,457 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:18:25,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:18:25,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:18:25,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:18:25,458 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_7da48247-ef4b-419b-9f8d-11a86768bb32/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 409f93cc3fb27e0335e986593862ddeb482b815c [2021-10-13 07:18:25,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:18:25,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:18:25,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:18:25,842 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:18:25,843 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:18:25,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/bitvector/byte_add-1.i [2021-10-13 07:18:25,931 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/data/7dfd4cfdd/a72b8d45a066403198ee1f5dafc5610b/FLAG631e44264 [2021-10-13 07:18:26,531 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:18:26,537 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/sv-benchmarks/c/bitvector/byte_add-1.i [2021-10-13 07:18:26,546 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/data/7dfd4cfdd/a72b8d45a066403198ee1f5dafc5610b/FLAG631e44264 [2021-10-13 07:18:26,872 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/data/7dfd4cfdd/a72b8d45a066403198ee1f5dafc5610b [2021-10-13 07:18:26,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:18:26,876 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:18:26,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:18:26,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:18:26,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:18:26,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:18:26" (1/1) ... [2021-10-13 07:18:26,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@534d9689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:26, skipping insertion in model container [2021-10-13 07:18:26,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:18:26" (1/1) ... [2021-10-13 07:18:26,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:18:26,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:18:27,076 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_7da48247-ef4b-419b-9f8d-11a86768bb32/sv-benchmarks/c/bitvector/byte_add-1.i[861,874] [2021-10-13 07:18:27,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:18:27,123 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:18:27,182 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_7da48247-ef4b-419b-9f8d-11a86768bb32/sv-benchmarks/c/bitvector/byte_add-1.i[861,874] [2021-10-13 07:18:27,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:18:27,238 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:18:27,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:27 WrapperNode [2021-10-13 07:18:27,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:18:27,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:18:27,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:18:27,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:18:27,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:27" (1/1) ... [2021-10-13 07:18:27,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:27" (1/1) ... [2021-10-13 07:18:27,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:18:27,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:18:27,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:18:27,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:18:27,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:27" (1/1) ... [2021-10-13 07:18:27,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:27" (1/1) ... [2021-10-13 07:18:27,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:27" (1/1) ... [2021-10-13 07:18:27,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:27" (1/1) ... [2021-10-13 07:18:27,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:27" (1/1) ... [2021-10-13 07:18:27,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:27" (1/1) ... [2021-10-13 07:18:27,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:27" (1/1) ... [2021-10-13 07:18:27,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:18:27,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:18:27,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:18:27,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:18:27,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:27" (1/1) ... [2021-10-13 07:18:27,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:18:27,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:18:27,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:18:27,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:18:27,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:18:27,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:18:27,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:18:27,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:18:27,853 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:18:27,853 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 07:18:27,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:27 BoogieIcfgContainer [2021-10-13 07:18:27,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:18:27,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:18:27,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:18:27,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:18:27,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:18:26" (1/3) ... [2021-10-13 07:18:27,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a6a676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:18:27, skipping insertion in model container [2021-10-13 07:18:27,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:27" (2/3) ... [2021-10-13 07:18:27,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a6a676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:18:27, skipping insertion in model container [2021-10-13 07:18:27,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:27" (3/3) ... [2021-10-13 07:18:27,876 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2021-10-13 07:18:27,881 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:18:27,881 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:18:27,952 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:18:27,961 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 07:18:27,961 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:18:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 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 07:18:28,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:18:28,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:28,003 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:28,003 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:28,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:28,012 INFO L82 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-10-13 07:18:28,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:28,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327920909] [2021-10-13 07:18:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:28,026 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:28,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:28,029 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:28,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:18:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:28,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:18:28,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:28,266 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 07:18:28,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:28,312 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 07:18:28,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:28,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327920909] [2021-10-13 07:18:28,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327920909] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:18:28,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:18:28,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:18:28,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980692539] [2021-10-13 07:18:28,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:18:28,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:28,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:18:28,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:18:28,338 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:18:28,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:28,360 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-10-13 07:18:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:18:28,362 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 07:18:28,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:28,373 INFO L225 Difference]: With dead ends: 57 [2021-10-13 07:18:28,374 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 07:18:28,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:18:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 07:18:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-13 07:18:28,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:18:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-10-13 07:18:28,421 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-10-13 07:18:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:28,422 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-10-13 07:18:28,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:18:28,423 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-10-13 07:18:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:18:28,425 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:28,425 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:28,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:28,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:18:28,638 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:28,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:28,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-10-13 07:18:28,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:28,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075426494] [2021-10-13 07:18:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:28,646 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:28,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:28,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:28,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:18:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:28,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:18:28,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:28,849 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 07:18:28,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:28,912 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 07:18:28,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:28,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075426494] [2021-10-13 07:18:28,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075426494] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:18:28,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:18:28,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:18:28,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384625794] [2021-10-13 07:18:28,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:18:28,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:28,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:18:28,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:18:28,919 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 07:18:29,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:29,327 INFO L93 Difference]: Finished difference Result 180 states and 315 transitions. [2021-10-13 07:18:29,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:18:29,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 07:18:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:29,334 INFO L225 Difference]: With dead ends: 180 [2021-10-13 07:18:29,334 INFO L226 Difference]: Without dead ends: 152 [2021-10-13 07:18:29,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:18:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-13 07:18:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 97. [2021-10-13 07:18:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.5833333333333333) internal successors, (152), 96 states have internal predecessors, (152), 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 07:18:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 152 transitions. [2021-10-13 07:18:29,370 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 152 transitions. Word has length 12 [2021-10-13 07:18:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:29,373 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 152 transitions. [2021-10-13 07:18:29,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 07:18:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 152 transitions. [2021-10-13 07:18:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:18:29,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:29,376 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:29,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:29,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:18:29,588 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:29,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:29,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1251593412, now seen corresponding path program 1 times [2021-10-13 07:18:29,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:29,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556814212] [2021-10-13 07:18:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:29,590 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:29,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:29,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:29,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:18:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:29,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:18:29,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:29,788 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 07:18:29,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:29,901 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 07:18:29,902 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:29,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556814212] [2021-10-13 07:18:29,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556814212] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:18:29,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:18:29,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-10-13 07:18:29,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960399834] [2021-10-13 07:18:29,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:18:29,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:29,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:18:29,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:18:29,905 INFO L87 Difference]: Start difference. First operand 97 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 07:18:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:30,564 INFO L93 Difference]: Finished difference Result 251 states and 421 transitions. [2021-10-13 07:18:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:18:30,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) Word has length 14 [2021-10-13 07:18:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:30,566 INFO L225 Difference]: With dead ends: 251 [2021-10-13 07:18:30,567 INFO L226 Difference]: Without dead ends: 223 [2021-10-13 07:18:30,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:18:30,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-10-13 07:18:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 191. [2021-10-13 07:18:30,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5947368421052632) internal successors, (303), 190 states have internal predecessors, (303), 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 07:18:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 303 transitions. [2021-10-13 07:18:30,589 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 303 transitions. Word has length 14 [2021-10-13 07:18:30,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:30,590 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 303 transitions. [2021-10-13 07:18:30,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 07:18:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 303 transitions. [2021-10-13 07:18:30,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:18:30,593 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:30,593 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:30,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:30,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:18:30,804 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:30,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:30,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2087887882, now seen corresponding path program 1 times [2021-10-13 07:18:30,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:30,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169059048] [2021-10-13 07:18:30,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:30,806 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:30,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:30,807 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:30,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:18:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:30,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:18:30,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:30,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:31,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:31,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169059048] [2021-10-13 07:18:31,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169059048] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:18:31,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:18:31,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:18:31,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676977942] [2021-10-13 07:18:31,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:18:31,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:31,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:18:31,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:18:31,042 INFO L87 Difference]: Start difference. First operand 191 states and 303 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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 07:18:31,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:31,177 INFO L93 Difference]: Finished difference Result 449 states and 722 transitions. [2021-10-13 07:18:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:18:31,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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 26 [2021-10-13 07:18:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:31,182 INFO L225 Difference]: With dead ends: 449 [2021-10-13 07:18:31,182 INFO L226 Difference]: Without dead ends: 292 [2021-10-13 07:18:31,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:18:31,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-10-13 07:18:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 257. [2021-10-13 07:18:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.55078125) internal successors, (397), 256 states have internal predecessors, (397), 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 07:18:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 397 transitions. [2021-10-13 07:18:31,224 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 397 transitions. Word has length 26 [2021-10-13 07:18:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:31,225 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 397 transitions. [2021-10-13 07:18:31,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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 07:18:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 397 transitions. [2021-10-13 07:18:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:18:31,229 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:31,230 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:31,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:31,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:18:31,448 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:31,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:31,448 INFO L82 PathProgramCache]: Analyzing trace with hash 73987210, now seen corresponding path program 1 times [2021-10-13 07:18:31,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:31,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023142218] [2021-10-13 07:18:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:31,449 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:31,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:31,450 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:31,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:18:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:31,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:18:31,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:31,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:31,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:31,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023142218] [2021-10-13 07:18:31,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023142218] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:18:31,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:18:31,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:18:31,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703231633] [2021-10-13 07:18:31,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:18:31,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:31,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:18:31,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:18:31,746 INFO L87 Difference]: Start difference. First operand 257 states and 397 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 07:18:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:32,070 INFO L93 Difference]: Finished difference Result 1005 states and 1558 transitions. [2021-10-13 07:18:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:18:32,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 26 [2021-10-13 07:18:32,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:32,082 INFO L225 Difference]: With dead ends: 1005 [2021-10-13 07:18:32,084 INFO L226 Difference]: Without dead ends: 784 [2021-10-13 07:18:32,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:18:32,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-10-13 07:18:32,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 636. [2021-10-13 07:18:32,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.5181102362204724) internal successors, (964), 635 states have internal predecessors, (964), 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 07:18:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 964 transitions. [2021-10-13 07:18:32,119 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 964 transitions. Word has length 26 [2021-10-13 07:18:32,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:32,119 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 964 transitions. [2021-10-13 07:18:32,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 07:18:32,120 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 964 transitions. [2021-10-13 07:18:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 07:18:32,126 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:32,126 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:32,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:32,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:18:32,338 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:32,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:32,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1742793183, now seen corresponding path program 1 times [2021-10-13 07:18:32,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:32,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640270362] [2021-10-13 07:18:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:32,339 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:32,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:32,340 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:32,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:18:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:32,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:18:32,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:32,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:32,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:32,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640270362] [2021-10-13 07:18:32,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640270362] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:18:32,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:18:32,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-13 07:18:32,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858278500] [2021-10-13 07:18:32,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:18:32,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:32,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:18:32,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:18:32,900 INFO L87 Difference]: Start difference. First operand 636 states and 964 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:18:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:34,044 INFO L93 Difference]: Finished difference Result 2019 states and 3076 transitions. [2021-10-13 07:18:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 07:18:34,044 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 07:18:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:34,053 INFO L225 Difference]: With dead ends: 2019 [2021-10-13 07:18:34,053 INFO L226 Difference]: Without dead ends: 1433 [2021-10-13 07:18:34,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-10-13 07:18:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2021-10-13 07:18:34,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 851. [2021-10-13 07:18:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.4388235294117646) internal successors, (1223), 850 states have internal predecessors, (1223), 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 07:18:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1223 transitions. [2021-10-13 07:18:34,114 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1223 transitions. Word has length 28 [2021-10-13 07:18:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:34,115 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1223 transitions. [2021-10-13 07:18:34,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:18:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1223 transitions. [2021-10-13 07:18:34,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 07:18:34,117 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:34,117 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:34,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-13 07:18:34,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:18:34,330 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:34,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:34,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2075339537, now seen corresponding path program 1 times [2021-10-13 07:18:34,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:34,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492301141] [2021-10-13 07:18:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:34,331 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:34,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:34,332 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:34,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:18:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:34,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:18:34,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:34,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:34,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:34,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492301141] [2021-10-13 07:18:34,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492301141] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:18:34,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:18:34,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:18:34,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109109508] [2021-10-13 07:18:34,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:18:34,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:34,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:18:34,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:18:34,608 INFO L87 Difference]: Start difference. First operand 851 states and 1223 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:18:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:34,645 INFO L93 Difference]: Finished difference Result 1165 states and 1644 transitions. [2021-10-13 07:18:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:18:34,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-13 07:18:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:34,653 INFO L225 Difference]: With dead ends: 1165 [2021-10-13 07:18:34,653 INFO L226 Difference]: Without dead ends: 1069 [2021-10-13 07:18:34,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:18:34,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-10-13 07:18:34,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1027. [2021-10-13 07:18:34,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 1.4132553606237817) internal successors, (1450), 1026 states have internal predecessors, (1450), 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 07:18:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1450 transitions. [2021-10-13 07:18:34,702 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1450 transitions. Word has length 31 [2021-10-13 07:18:34,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:34,702 INFO L470 AbstractCegarLoop]: Abstraction has 1027 states and 1450 transitions. [2021-10-13 07:18:34,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:18:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1450 transitions. [2021-10-13 07:18:34,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 07:18:34,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:34,708 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:34,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:34,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:18:34,927 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:34,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1961462321, now seen corresponding path program 1 times [2021-10-13 07:18:34,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:34,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506399075] [2021-10-13 07:18:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:34,929 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:34,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:34,930 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:34,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:18:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:35,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:18:35,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:35,257 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 07:18:35,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:35,421 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 07:18:35,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:35,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506399075] [2021-10-13 07:18:35,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506399075] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:35,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [629216251] [2021-10-13 07:18:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:35,423 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:18:35,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:18:35,428 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:18:35,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 07:18:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:35,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:18:35,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:35,815 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 07:18:35,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:35,925 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 07:18:35,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [629216251] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:35,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979192787] [2021-10-13 07:18:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:35,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:18:35,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:18:35,932 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:18:35,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 07:18:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:36,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:18:36,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:36,216 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 07:18:36,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:36,340 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 07:18:36,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979192787] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:36,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:18:36,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 4, 4] total 14 [2021-10-13 07:18:36,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316218630] [2021-10-13 07:18:36,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:18:36,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:36,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:18:36,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:18:36,343 INFO L87 Difference]: Start difference. First operand 1027 states and 1450 transitions. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 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 07:18:38,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:38,140 INFO L93 Difference]: Finished difference Result 3999 states and 5739 transitions. [2021-10-13 07:18:38,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 07:18:38,140 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 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 31 [2021-10-13 07:18:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:38,154 INFO L225 Difference]: With dead ends: 3999 [2021-10-13 07:18:38,154 INFO L226 Difference]: Without dead ends: 2423 [2021-10-13 07:18:38,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 553.2ms TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 07:18:38,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-10-13 07:18:38,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1527. [2021-10-13 07:18:38,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 1.3669724770642202) internal successors, (2086), 1526 states have internal predecessors, (2086), 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 07:18:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2086 transitions. [2021-10-13 07:18:38,230 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2086 transitions. Word has length 31 [2021-10-13 07:18:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:38,231 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 2086 transitions. [2021-10-13 07:18:38,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 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 07:18:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2086 transitions. [2021-10-13 07:18:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 07:18:38,234 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:38,234 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:38,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:38,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:38,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:38,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:18:38,837 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:38,837 INFO L82 PathProgramCache]: Analyzing trace with hash 945650591, now seen corresponding path program 1 times [2021-10-13 07:18:38,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:38,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98056028] [2021-10-13 07:18:38,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:38,838 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:38,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:38,839 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:38,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:18:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:39,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 07:18:39,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:18:42,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:18:45,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:45,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98056028] [2021-10-13 07:18:45,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98056028] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:45,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1743452432] [2021-10-13 07:18:45,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:45,047 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:18:45,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:18:45,065 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:18:45,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 07:18:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:45,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 07:18:45,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:18:47,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:18:48,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1743452432] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:48,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208961143] [2021-10-13 07:18:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:48,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:18:48,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:18:48,721 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:18:48,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 07:18:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:49,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 07:18:49,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:18:51,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:18:51,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208961143] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:51,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:18:51,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 20, 20] total 42 [2021-10-13 07:18:51,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786979847] [2021-10-13 07:18:51,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-13 07:18:51,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:51,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-13 07:18:51,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 07:18:51,698 INFO L87 Difference]: Start difference. First operand 1527 states and 2086 transitions. Second operand has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:16,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:16,596 INFO L93 Difference]: Finished difference Result 3721 states and 5033 transitions. [2021-10-13 07:19:16,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-10-13 07:19:16,597 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-10-13 07:19:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:16,620 INFO L225 Difference]: With dead ends: 3721 [2021-10-13 07:19:16,620 INFO L226 Difference]: Without dead ends: 3573 [2021-10-13 07:19:16,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2385 ImplicationChecksByTransitivity, 16658.7ms TimeCoverageRelationStatistics Valid=3047, Invalid=9609, Unknown=0, NotChecked=0, Total=12656 [2021-10-13 07:19:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3573 states. [2021-10-13 07:19:16,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3573 to 1763. [2021-10-13 07:19:16,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 1.3717366628830874) internal successors, (2417), 1762 states have internal predecessors, (2417), 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 07:19:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2417 transitions. [2021-10-13 07:19:16,761 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2417 transitions. Word has length 51 [2021-10-13 07:19:16,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:16,761 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 2417 transitions. [2021-10-13 07:19:16,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:16,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2417 transitions. [2021-10-13 07:19:16,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 07:19:16,764 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:16,765 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:16,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:16,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:17,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:17,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:19:17,366 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:19:17,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:17,366 INFO L82 PathProgramCache]: Analyzing trace with hash -65466659, now seen corresponding path program 1 times [2021-10-13 07:19:17,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:19:17,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835607192] [2021-10-13 07:19:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:17,367 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:19:17,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:19:17,369 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:19:17,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 07:19:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:18,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:19:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:19:18,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:19:18,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:19:18,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835607192] [2021-10-13 07:19:18,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835607192] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:18,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1338653983] [2021-10-13 07:19:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:18,469 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:19:18,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:19:18,470 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:19:18,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-13 07:19:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:19,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:19:19,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:19:19,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:19:19,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1338653983] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:19,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706299265] [2021-10-13 07:19:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:19,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:19:19,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:19:19,701 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:19:19,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 07:19:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:20,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:19:20,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:19:20,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 07:19:20,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706299265] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:20,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:19:20,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 5, 5, 4] total 12 [2021-10-13 07:19:20,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839687436] [2021-10-13 07:19:20,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:19:20,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:19:20,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:19:20,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:19:20,854 INFO L87 Difference]: Start difference. First operand 1763 states and 2417 transitions. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 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 07:19:22,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:22,443 INFO L93 Difference]: Finished difference Result 3838 states and 5315 transitions. [2021-10-13 07:19:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 07:19:22,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 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 51 [2021-10-13 07:19:22,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:22,457 INFO L225 Difference]: With dead ends: 3838 [2021-10-13 07:19:22,457 INFO L226 Difference]: Without dead ends: 2137 [2021-10-13 07:19:22,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 301 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-10-13 07:19:22,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-10-13 07:19:22,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1809. [2021-10-13 07:19:22,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 1.2688053097345133) internal successors, (2294), 1808 states have internal predecessors, (2294), 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 07:19:22,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2294 transitions. [2021-10-13 07:19:22,588 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2294 transitions. Word has length 51 [2021-10-13 07:19:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:22,588 INFO L470 AbstractCegarLoop]: Abstraction has 1809 states and 2294 transitions. [2021-10-13 07:19:22,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 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 07:19:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2294 transitions. [2021-10-13 07:19:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-13 07:19:22,592 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:22,592 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:22,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-13 07:19:22,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:23,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:23,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:19:23,208 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:19:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:23,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1950719985, now seen corresponding path program 1 times [2021-10-13 07:19:23,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:19:23,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193803767] [2021-10-13 07:19:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:23,210 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:19:23,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:19:23,211 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:19:23,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 07:19:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:19:23,918 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:19:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:19:24,046 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:19:24,046 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:19:24,048 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:19:24,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:24,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:19:24,274 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:19:24,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:19:24 BoogieIcfgContainer [2021-10-13 07:19:24,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:19:24,389 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:19:24,389 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:19:24,389 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:19:24,390 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:27" (3/4) ... [2021-10-13 07:19:24,391 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:19:24,479 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:19:24,479 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:19:24,481 INFO L168 Benchmark]: Toolchain (without parser) took 57603.96 ms. Allocated memory was 77.6 MB in the beginning and 197.1 MB in the end (delta: 119.5 MB). Free memory was 42.4 MB in the beginning and 91.1 MB in the end (delta: -48.7 MB). Peak memory consumption was 71.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:24,481 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 77.6 MB. Free memory was 58.8 MB in the beginning and 58.8 MB in the end (delta: 66.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:19:24,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.71 ms. Allocated memory is still 77.6 MB. Free memory was 42.2 MB in the beginning and 60.0 MB in the end (delta: -17.8 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:24,483 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.61 ms. Allocated memory is still 77.6 MB. Free memory was 59.8 MB in the beginning and 58.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:24,483 INFO L168 Benchmark]: Boogie Preprocessor took 57.41 ms. Allocated memory is still 77.6 MB. Free memory was 57.9 MB in the beginning and 56.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:19:24,484 INFO L168 Benchmark]: RCFGBuilder took 514.21 ms. Allocated memory is still 77.6 MB. Free memory was 56.5 MB in the beginning and 43.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:24,484 INFO L168 Benchmark]: TraceAbstraction took 56531.81 ms. Allocated memory was 77.6 MB in the beginning and 197.1 MB in the end (delta: 119.5 MB). Free memory was 42.7 MB in the beginning and 96.3 MB in the end (delta: -53.6 MB). Peak memory consumption was 68.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:24,485 INFO L168 Benchmark]: Witness Printer took 90.16 ms. Allocated memory is still 197.1 MB. Free memory was 96.3 MB in the beginning and 91.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:24,488 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 77.6 MB. Free memory was 58.8 MB in the beginning and 58.8 MB in the end (delta: 66.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 354.71 ms. Allocated memory is still 77.6 MB. Free memory was 42.2 MB in the beginning and 60.0 MB in the end (delta: -17.8 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.61 ms. Allocated memory is still 77.6 MB. Free memory was 59.8 MB in the beginning and 58.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.41 ms. Allocated memory is still 77.6 MB. Free memory was 57.9 MB in the beginning and 56.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 514.21 ms. Allocated memory is still 77.6 MB. Free memory was 56.5 MB in the beginning and 43.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 56531.81 ms. Allocated memory was 77.6 MB in the beginning and 197.1 MB in the end (delta: 119.5 MB). Free memory was 42.7 MB in the beginning and 96.3 MB in the end (delta: -53.6 MB). Peak memory consumption was 68.2 MB. Max. memory is 16.1 GB. * Witness Printer took 90.16 ms. Allocated memory is still 197.1 MB. Free memory was 96.3 MB in the beginning and 91.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L116] unsigned int a, b, r; [L118] a = __VERIFIER_nondet_uint() [L119] b = __VERIFIER_nondet_uint() [L34] unsigned char a0, a1, a2, a3; [L35] unsigned char b0, b1, b2, b3; [L36] unsigned char r0, r1, r2, r3; [L37] unsigned short carry; [L38] unsigned short partial_sum; [L39] unsigned int r; [L40] unsigned char i; [L41] unsigned char na, nb; [L42] a0 = a [L43] a1 = a >> 8 [L44] a2 = a >> 16U [L45] a3 = a >> 24U [L46] b0 = b [L47] b1 = b >> 8U [L48] b2 = b >> 16U [L49] b3 = b >> 24U [L50] na = (unsigned char)4 [L51] COND TRUE a3 == (unsigned char)0 [L52] na = na - 1 [L53] COND TRUE a2 == (unsigned char)0 [L54] na = na - 1 [L55] COND TRUE a1 == (unsigned char)0 [L56] na = na - 1 [L60] nb = (unsigned char)4 [L61] COND TRUE b3 == (unsigned char)0 [L62] nb = nb - 1 [L63] COND TRUE b2 == (unsigned char)0 [L64] nb = nb - 1 [L65] COND TRUE b1 == (unsigned char)0 [L66] nb = nb - 1 [L70] carry = (unsigned short)0 [L71] i = (unsigned char)0 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND TRUE i < na [L76] COND TRUE i == (unsigned char)0 [L76] partial_sum = partial_sum + a0 [L77] COND FALSE !(i == (unsigned char)1) [L78] COND FALSE !(i == (unsigned char)2) [L79] COND FALSE !(i == (unsigned char)3) [L81] COND TRUE i < nb [L82] COND TRUE i == (unsigned char)0 [L82] partial_sum = partial_sum + b0 [L83] COND FALSE !(i == (unsigned char)1) [L84] COND FALSE !(i == (unsigned char)2) [L85] COND FALSE !(i == (unsigned char)3) [L87] COND TRUE partial_sum > ((unsigned char)254) [L88] partial_sum = partial_sum & ((unsigned char)255) [L89] carry = (unsigned short)1 [L91] COND TRUE i == (unsigned char)0 [L91] r0 = (unsigned char)partial_sum [L92] COND FALSE !(i == (unsigned char)1) [L93] COND FALSE !(i == (unsigned char)2) [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND FALSE !(i < na) [L81] COND FALSE !(i < nb) [L87] COND FALSE !(partial_sum > ((unsigned char)254)) [L91] COND FALSE !(i == (unsigned char)0) [L92] COND TRUE i == (unsigned char)1 [L92] r1 = (unsigned char)partial_sum [L93] COND FALSE !(i == (unsigned char)2) [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L99] COND TRUE i < (unsigned char)4 [L100] COND FALSE !(i == (unsigned char)0) [L101] COND FALSE !(i == (unsigned char)1) [L102] COND TRUE i == (unsigned char)2 [L102] r2 = (unsigned char)0 [L103] COND FALSE !(i == (unsigned char)3) [L105] i = i + (unsigned char)1 [L99] COND TRUE i < (unsigned char)4 [L100] COND FALSE !(i == (unsigned char)0) [L101] COND FALSE !(i == (unsigned char)1) [L102] COND FALSE !(i == (unsigned char)2) [L103] COND TRUE i == (unsigned char)3 [L103] r3 = (unsigned char)0 [L105] i = i + (unsigned char)1 [L99] COND FALSE !(i < (unsigned char)4) [L108] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L110] return r; [L121] r = mp_add(a, b) [L16] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 56321.3ms, OverallIterations: 11, TraceHistogramMax: 3, EmptinessCheckTime: 52.5ms, AutomataDifference: 31172.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 912 SDtfs, 5991 SDslu, 6273 SDs, 0 SdLazy, 11572 SolverSat, 1002 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12882.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1218 GetRequests, 983 SyntacticMatches, 12 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 18139.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1809occurred in iteration=10, InterpolantAutomatonStates: 188, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 592.5ms AutomataMinimizationTime, 10 MinimizatonAttempts, 3928 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 157.1ms SsaConstructionTime, 534.9ms SatisfiabilityAnalysisTime, 15309.4ms InterpolantComputationTime, 602 NumberOfCodeBlocks, 602 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 1064 ConstructedInterpolants, 22 QuantifiedInterpolants, 14976 SizeOfPredicates, 90 NumberOfNonLiveVariables, 1263 ConjunctsInSsa, 156 ConjunctsInUnsatCore, 32 InterpolantComputations, 14 PerfectInterpolantSequences, 185/278 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 07:19:24,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da48247-ef4b-419b-9f8d-11a86768bb32/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...