./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark25_linear.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_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/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_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark25_linear.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/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_371e27d4-6846-4944-ae9b-0b6c36c7de3e/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 57db2827f748fdac723600595d50868896f17762 ........................................................................................................................................................................................................................................................................................................................................................ 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_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/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_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark25_linear.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/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_371e27d4-6846-4944-ae9b-0b6c36c7de3e/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 57db2827f748fdac723600595d50868896f17762 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:00:01,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:00:01,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:00:01,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:00:01,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:00:01,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:00:01,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:00:01,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:00:01,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:00:01,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:00:01,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:00:01,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:00:01,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:00:01,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:00:01,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:00:01,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:00:01,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:00:01,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:00:01,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:00:01,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:00:01,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:00:01,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:00:01,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:00:01,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:00:01,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:00:01,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:00:01,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:00:01,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:00:01,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:00:01,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:00:01,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:00:01,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:00:01,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:00:01,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:00:01,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:00:01,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:00:01,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:00:01,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:00:01,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:00:01,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:00:01,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:00:01,588 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:00:01,638 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:00:01,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:00:01,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:00:01,640 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:00:01,640 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:00:01,641 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:00:01,641 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:00:01,641 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:00:01,646 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:00:01,646 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:00:01,647 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:00:01,653 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:00:01,654 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:00:01,654 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:00:01,654 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:00:01,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:00:01,655 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:00:01,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:00:01,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:00:01,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:00:01,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:00:01,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:00:01,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:00:01,656 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:00:01,657 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:00:01,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:00:01,657 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:00:01,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:00:01,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:00:01,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:00:01,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:00:01,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:00:01,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:00:01,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:00:01,659 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:00:01,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:00:01,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:00:01,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:00:01,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:00:01,660 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_371e27d4-6846-4944-ae9b-0b6c36c7de3e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57db2827f748fdac723600595d50868896f17762 [2021-10-13 08:00:01,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:00:01,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:00:01,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:00:01,960 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:00:01,961 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:00:01,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-zilu/benchmark25_linear.i [2021-10-13 08:00:02,037 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/data/c9c098dde/4e3737381ae64995a526a823dae8374b/FLAG282060e7b [2021-10-13 08:00:02,459 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:00:02,460 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/sv-benchmarks/c/loop-zilu/benchmark25_linear.i [2021-10-13 08:00:02,466 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/data/c9c098dde/4e3737381ae64995a526a823dae8374b/FLAG282060e7b [2021-10-13 08:00:02,862 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/data/c9c098dde/4e3737381ae64995a526a823dae8374b [2021-10-13 08:00:02,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:00:02,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:00:02,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:00:02,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:00:02,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:00:02,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:00:02" (1/1) ... [2021-10-13 08:00:02,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f64cbc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:02, skipping insertion in model container [2021-10-13 08:00:02,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:00:02" (1/1) ... [2021-10-13 08:00:02,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:00:02,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:00:03,055 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_371e27d4-6846-4944-ae9b-0b6c36c7de3e/sv-benchmarks/c/loop-zilu/benchmark25_linear.i[868,881] [2021-10-13 08:00:03,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:00:03,095 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:00:03,116 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_371e27d4-6846-4944-ae9b-0b6c36c7de3e/sv-benchmarks/c/loop-zilu/benchmark25_linear.i[868,881] [2021-10-13 08:00:03,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:00:03,136 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:00:03,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:03 WrapperNode [2021-10-13 08:00:03,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:00:03,139 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:00:03,139 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:00:03,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:00:03,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:03" (1/1) ... [2021-10-13 08:00:03,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:03" (1/1) ... [2021-10-13 08:00:03,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:00:03,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:00:03,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:00:03,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:00:03,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:03" (1/1) ... [2021-10-13 08:00:03,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:03" (1/1) ... [2021-10-13 08:00:03,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:03" (1/1) ... [2021-10-13 08:00:03,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:03" (1/1) ... [2021-10-13 08:00:03,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:03" (1/1) ... [2021-10-13 08:00:03,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:03" (1/1) ... [2021-10-13 08:00:03,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:03" (1/1) ... [2021-10-13 08:00:03,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:00:03,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:00:03,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:00:03,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:00:03,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:03" (1/1) ... [2021-10-13 08:00:03,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:00:03,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:00:03,252 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:00:03,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:00:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:00:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:00:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:00:03,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:00:03,570 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:00:03,570 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 08:00:03,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:00:03 BoogieIcfgContainer [2021-10-13 08:00:03,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:00:03,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:00:03,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:00:03,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:00:03,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:00:02" (1/3) ... [2021-10-13 08:00:03,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718bdf57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:00:03, skipping insertion in model container [2021-10-13 08:00:03,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:03" (2/3) ... [2021-10-13 08:00:03,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718bdf57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:00:03, skipping insertion in model container [2021-10-13 08:00:03,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:00:03" (3/3) ... [2021-10-13 08:00:03,590 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark25_linear.i [2021-10-13 08:00:03,595 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:00:03,596 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:00:03,657 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:00:03,664 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 08:00:03,664 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:00:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:03,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:00:03,683 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:00:03,684 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:00:03,684 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:00:03,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:00:03,690 INFO L82 PathProgramCache]: Analyzing trace with hash 59349214, now seen corresponding path program 1 times [2021-10-13 08:00:03,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:00:03,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181043364] [2021-10-13 08:00:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:00:03,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:00:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:00:03,885 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 08:00:03,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:00:03,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181043364] [2021-10-13 08:00:03,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181043364] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:00:03,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:00:03,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:00:03,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106791456] [2021-10-13 08:00:03,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:00:03,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:00:03,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:00:03,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:00:03,912 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:00:03,939 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-10-13 08:00:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:00:03,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:00:03,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:00:03,949 INFO L225 Difference]: With dead ends: 16 [2021-10-13 08:00:03,949 INFO L226 Difference]: Without dead ends: 7 [2021-10-13 08:00:03,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:00:03,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-13 08:00:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-13 08:00:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:03,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-13 08:00:03,981 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-10-13 08:00:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:00:03,981 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-13 08:00:03,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:03,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-13 08:00:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 08:00:03,982 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:00:03,982 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 08:00:03,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:00:03,983 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:00:03,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:00:03,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1839242300, now seen corresponding path program 1 times [2021-10-13 08:00:03,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:00:03,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897540423] [2021-10-13 08:00:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:00:03,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:00:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:00:04,060 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 08:00:04,060 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:00:04,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897540423] [2021-10-13 08:00:04,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897540423] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:00:04,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437336027] [2021-10-13 08:00:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:00:04,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:00:04,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:00:04,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:00:04,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:00:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:00:04,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:00:04,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:00:04,162 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 08:00:04,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:00:04,215 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 08:00:04,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437336027] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:00:04,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1532329796] [2021-10-13 08:00:04,236 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-13 08:00:04,236 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:00:04,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:00:04,246 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:00:04,246 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:00:04,277 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:00:04,282 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:00:04,282 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:00:04,283 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 08:00:04,287 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:00:04,288 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:00:04,289 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 08:00:04,293 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-10-13 08:00:04,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:00:04,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:00:04,355 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 08:00:04,356 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 08:00:04,371 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:00:04,376 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 08:00:04,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:00:04,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 08:00:04,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:00:04,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:00:04,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:00:04,406 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:00:04,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-13 08:00:04,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:00:04,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:94, output treesize:82 [2021-10-13 08:00:04,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:00:04,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:00:04,642 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_8| 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 08:00:04,646 INFO L168 Benchmark]: Toolchain (without parser) took 1779.60 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 69.8 MB in the beginning and 111.7 MB in the end (delta: -41.9 MB). Peak memory consumption was 35.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:00:04,647 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 113.2 MB. Free memory was 86.0 MB in the beginning and 86.0 MB in the end (delta: 66.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:00:04,647 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.11 ms. Allocated memory is still 113.2 MB. Free memory was 69.6 MB in the beginning and 88.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:00:04,648 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.26 ms. Allocated memory is still 113.2 MB. Free memory was 88.3 MB in the beginning and 87.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:00:04,649 INFO L168 Benchmark]: Boogie Preprocessor took 31.56 ms. Allocated memory is still 113.2 MB. Free memory was 87.1 MB in the beginning and 86.2 MB in the end (delta: 928.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:00:04,649 INFO L168 Benchmark]: RCFGBuilder took 358.23 ms. Allocated memory is still 113.2 MB. Free memory was 85.9 MB in the beginning and 76.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:00:04,650 INFO L168 Benchmark]: TraceAbstraction took 1070.62 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 75.8 MB in the beginning and 111.7 MB in the end (delta: -35.9 MB). Peak memory consumption was 43.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:00:04,654 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 113.2 MB. Free memory was 86.0 MB in the beginning and 86.0 MB in the end (delta: 66.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 269.11 ms. Allocated memory is still 113.2 MB. Free memory was 69.6 MB in the beginning and 88.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.26 ms. Allocated memory is still 113.2 MB. Free memory was 88.3 MB in the beginning and 87.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.56 ms. Allocated memory is still 113.2 MB. Free memory was 87.1 MB in the beginning and 86.2 MB in the end (delta: 928.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 358.23 ms. Allocated memory is still 113.2 MB. Free memory was 85.9 MB in the beginning and 76.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1070.62 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 75.8 MB in the beginning and 111.7 MB in the end (delta: -35.9 MB). Peak memory consumption was 43.6 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_8| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_8|: 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 08:00:04,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/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 08:00:07,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:00:07,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:00:07,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:00:07,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:00:07,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:00:07,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:00:07,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:00:07,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:00:07,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:00:07,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:00:07,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:00:07,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:00:07,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:00:07,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:00:07,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:00:07,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:00:07,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:00:07,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:00:07,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:00:07,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:00:07,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:00:07,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:00:07,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:00:07,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:00:07,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:00:07,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:00:07,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:00:07,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:00:07,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:00:07,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:00:07,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:00:07,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:00:07,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:00:07,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:00:07,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:00:07,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:00:07,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:00:07,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:00:07,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:00:07,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:00:07,363 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:00:07,392 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:00:07,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:00:07,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:00:07,394 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:00:07,394 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:00:07,395 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:00:07,395 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:00:07,395 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:00:07,396 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:00:07,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:00:07,397 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:00:07,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:00:07,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:00:07,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:00:07,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:00:07,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:00:07,399 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:00:07,399 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:00:07,399 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:00:07,399 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:00:07,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:00:07,400 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:00:07,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:00:07,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:00:07,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:00:07,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:00:07,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:00:07,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:00:07,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:00:07,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:00:07,403 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:00:07,403 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:00:07,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:00:07,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:00:07,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:00:07,404 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_371e27d4-6846-4944-ae9b-0b6c36c7de3e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57db2827f748fdac723600595d50868896f17762 [2021-10-13 08:00:07,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:00:07,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:00:07,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:00:07,766 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:00:07,767 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:00:07,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-zilu/benchmark25_linear.i [2021-10-13 08:00:07,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/data/527eabd93/024c3fe1b6c9405c989d803795173f2d/FLAG7780b3d86 [2021-10-13 08:00:08,432 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:00:08,433 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/sv-benchmarks/c/loop-zilu/benchmark25_linear.i [2021-10-13 08:00:08,441 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/data/527eabd93/024c3fe1b6c9405c989d803795173f2d/FLAG7780b3d86 [2021-10-13 08:00:08,807 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/data/527eabd93/024c3fe1b6c9405c989d803795173f2d [2021-10-13 08:00:08,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:00:08,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:00:08,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:00:08,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:00:08,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:00:08,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:00:08" (1/1) ... [2021-10-13 08:00:08,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bff4eed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:08, skipping insertion in model container [2021-10-13 08:00:08,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:00:08" (1/1) ... [2021-10-13 08:00:08,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:00:08,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:00:08,985 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_371e27d4-6846-4944-ae9b-0b6c36c7de3e/sv-benchmarks/c/loop-zilu/benchmark25_linear.i[868,881] [2021-10-13 08:00:08,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:00:09,006 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:00:09,020 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_371e27d4-6846-4944-ae9b-0b6c36c7de3e/sv-benchmarks/c/loop-zilu/benchmark25_linear.i[868,881] [2021-10-13 08:00:09,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:00:09,046 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:00:09,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:09 WrapperNode [2021-10-13 08:00:09,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:00:09,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:00:09,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:00:09,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:00:09,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:09" (1/1) ... [2021-10-13 08:00:09,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:09" (1/1) ... [2021-10-13 08:00:09,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:00:09,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:00:09,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:00:09,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:00:09,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:09" (1/1) ... [2021-10-13 08:00:09,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:09" (1/1) ... [2021-10-13 08:00:09,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:09" (1/1) ... [2021-10-13 08:00:09,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:09" (1/1) ... [2021-10-13 08:00:09,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:09" (1/1) ... [2021-10-13 08:00:09,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:09" (1/1) ... [2021-10-13 08:00:09,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:09" (1/1) ... [2021-10-13 08:00:09,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:00:09,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:00:09,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:00:09,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:00:09,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:09" (1/1) ... [2021-10-13 08:00:09,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:00:09,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:00:09,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:00:09,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:00:09,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:00:09,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:00:09,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:00:09,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:00:09,466 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:00:09,466 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 08:00:09,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:00:09 BoogieIcfgContainer [2021-10-13 08:00:09,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:00:09,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:00:09,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:00:09,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:00:09,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:00:08" (1/3) ... [2021-10-13 08:00:09,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5290cb0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:00:09, skipping insertion in model container [2021-10-13 08:00:09,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:00:09" (2/3) ... [2021-10-13 08:00:09,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5290cb0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:00:09, skipping insertion in model container [2021-10-13 08:00:09,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:00:09" (3/3) ... [2021-10-13 08:00:09,483 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark25_linear.i [2021-10-13 08:00:09,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:00:09,489 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:00:09,565 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:00:09,575 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 08:00:09,575 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:00:09,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:09,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 08:00:09,603 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:00:09,604 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:00:09,604 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:00:09,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:00:09,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1807089479, now seen corresponding path program 1 times [2021-10-13 08:00:09,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:00:09,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539007283] [2021-10-13 08:00:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:00:09,633 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:00:09,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:00:09,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:00:09,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:00:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:00:09,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:00:09,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:00:09,742 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 08:00:09,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:00:09,770 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 08:00:09,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:00:09,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539007283] [2021-10-13 08:00:09,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539007283] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:00:09,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:00:09,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:00:09,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443576019] [2021-10-13 08:00:09,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:00:09,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:00:09,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:00:09,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:00:09,796 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:09,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:00:09,808 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-13 08:00:09,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:00:09,810 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 08:00:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:00:09,818 INFO L225 Difference]: With dead ends: 20 [2021-10-13 08:00:09,818 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 08:00:09,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:00:09,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 08:00:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 08:00:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-13 08:00:09,859 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7 [2021-10-13 08:00:09,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:00:09,860 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-13 08:00:09,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-13 08:00:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 08:00:09,862 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:00:09,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:00:09,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:00:10,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:00:10,074 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:00:10,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:00:10,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1806970315, now seen corresponding path program 1 times [2021-10-13 08:00:10,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:00:10,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799810758] [2021-10-13 08:00:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:00:10,077 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:00:10,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:00:10,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:00:10,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:00:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:00:10,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:00:10,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:00:10,218 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 08:00:10,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:00:10,265 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 08:00:10,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:00:10,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799810758] [2021-10-13 08:00:10,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799810758] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:00:10,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:00:10,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:00:10,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412438071] [2021-10-13 08:00:10,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:00:10,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:00:10,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:00:10,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:00:10,270 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:10,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:00:10,305 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-10-13 08:00:10,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:00:10,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 08:00:10,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:00:10,306 INFO L225 Difference]: With dead ends: 14 [2021-10-13 08:00:10,306 INFO L226 Difference]: Without dead ends: 10 [2021-10-13 08:00:10,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:00:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-13 08:00:10,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-13 08:00:10,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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 08:00:10,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-10-13 08:00:10,310 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-10-13 08:00:10,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:00:10,310 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-10-13 08:00:10,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:10,311 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-10-13 08:00:10,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 08:00:10,311 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:00:10,312 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:00:10,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:00:10,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:00:10,523 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:00:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:00:10,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1384978123, now seen corresponding path program 1 times [2021-10-13 08:00:10,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:00:10,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022266580] [2021-10-13 08:00:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:00:10,525 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:00:10,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:00:10,526 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:00:10,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:00:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:00:10,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:00:10,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:00:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:00:10,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:00:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:00:10,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:00:10,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022266580] [2021-10-13 08:00:10,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022266580] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:00:10,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1438901943] [2021-10-13 08:00:10,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:00:10,830 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:00:10,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:00:10,832 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:00:10,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 08:00:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:00:10,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:00:10,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:00:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:00:11,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:00:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:00:11,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1438901943] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:00:11,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156843919] [2021-10-13 08:00:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:00:11,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:00:11,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:00:11,196 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:00:11,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 08:00:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:00:11,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:00:11,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:00:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:00:11,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:00:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:00:11,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156843919] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:00:11,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:00:11,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-13 08:00:11,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129415774] [2021-10-13 08:00:11,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:00:11,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:00:11,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:00:11,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:00:11,380 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:11,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:00:11,548 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-10-13 08:00:11,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 08:00:11,549 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 08:00:11,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:00:11,550 INFO L225 Difference]: With dead ends: 18 [2021-10-13 08:00:11,550 INFO L226 Difference]: Without dead ends: 14 [2021-10-13 08:00:11,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-10-13 08:00:11,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-13 08:00:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-13 08:00:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-10-13 08:00:11,554 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2021-10-13 08:00:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:00:11,555 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-10-13 08:00:11,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-10-13 08:00:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 08:00:11,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:00:11,556 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:00:11,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:00:11,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:00:11,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-13 08:00:12,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:00:12,159 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:00:12,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:00:12,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1963731147, now seen corresponding path program 2 times [2021-10-13 08:00:12,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:00:12,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508819258] [2021-10-13 08:00:12,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:00:12,161 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:00:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:00:12,165 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:00:12,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 08:00:12,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:00:12,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:00:12,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:00:12,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:00:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 08:00:12,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:00:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 08:00:12,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:00:12,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508819258] [2021-10-13 08:00:12,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508819258] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:00:12,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:00:12,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-13 08:00:12,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452031735] [2021-10-13 08:00:12,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:00:12,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:00:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:00:12,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:00:12,509 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:12,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:00:12,550 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-13 08:00:12,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:00:12,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 08:00:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:00:12,551 INFO L225 Difference]: With dead ends: 14 [2021-10-13 08:00:12,552 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 08:00:12,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:00:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 08:00:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 08:00:12,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:12,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 08:00:12,553 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-10-13 08:00:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:00:12,554 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 08:00:12,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 08:00:12,555 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 08:00:12,557 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:00:12,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 08:00:12,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:00:12,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 08:00:12,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:00:12,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:00:12,846 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 08:00:12,846 INFO L857 garLoopResultBuilder]: For program point L21(line 21) no Hoare annotation was computed. [2021-10-13 08:00:12,846 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-10-13 08:00:12,846 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 08:00:12,847 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 08:00:12,847 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 08:00:12,847 INFO L860 garLoopResultBuilder]: At program point L26(lines 19 27) the Hoare annotation is: true [2021-10-13 08:00:12,847 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-10-13 08:00:12,848 INFO L853 garLoopResultBuilder]: At program point L22-2(lines 22 24) the Hoare annotation is: (or (bvslt ULTIMATE.start_main_~x~0 (_ bv0 32)) (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~x~0) (_ bv10 32))) [2021-10-13 08:00:12,848 INFO L857 garLoopResultBuilder]: For program point L22-3(lines 22 24) no Hoare annotation was computed. [2021-10-13 08:00:12,848 INFO L857 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-10-13 08:00:12,848 INFO L857 garLoopResultBuilder]: For program point L14(lines 14 18) no Hoare annotation was computed. [2021-10-13 08:00:12,853 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:00:12,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:00:12 BoogieIcfgContainer [2021-10-13 08:00:12,864 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:00:12,865 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:00:12,865 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:00:12,865 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:00:12,866 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:00:09" (3/4) ... [2021-10-13 08:00:12,869 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 08:00:12,881 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-13 08:00:12,881 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 08:00:12,881 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 08:00:12,882 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 08:00:12,924 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:00:12,924 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:00:12,926 INFO L168 Benchmark]: Toolchain (without parser) took 4113.31 ms. Allocated memory was 56.6 MB in the beginning and 79.7 MB in the end (delta: 23.1 MB). Free memory was 34.3 MB in the beginning and 34.4 MB in the end (delta: -115.3 kB). Peak memory consumption was 24.0 MB. Max. memory is 16.1 GB. [2021-10-13 08:00:12,926 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 56.6 MB. Free memory is still 36.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:00:12,927 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.61 ms. Allocated memory is still 56.6 MB. Free memory was 34.0 MB in the beginning and 39.9 MB in the end (delta: -5.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:00:12,928 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.55 ms. Allocated memory is still 56.6 MB. Free memory was 39.9 MB in the beginning and 38.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:00:12,928 INFO L168 Benchmark]: Boogie Preprocessor took 45.13 ms. Allocated memory is still 56.6 MB. Free memory was 38.5 MB in the beginning and 37.5 MB in the end (delta: 983.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:00:12,929 INFO L168 Benchmark]: RCFGBuilder took 337.26 ms. Allocated memory is still 56.6 MB. Free memory was 37.5 MB in the beginning and 28.8 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:00:12,929 INFO L168 Benchmark]: TraceAbstraction took 3393.99 ms. Allocated memory was 56.6 MB in the beginning and 79.7 MB in the end (delta: 23.1 MB). Free memory was 28.3 MB in the beginning and 36.5 MB in the end (delta: -8.1 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:00:12,930 INFO L168 Benchmark]: Witness Printer took 59.63 ms. Allocated memory is still 79.7 MB. Free memory was 36.5 MB in the beginning and 34.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:00:12,933 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 56.6 MB. Free memory is still 36.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 220.61 ms. Allocated memory is still 56.6 MB. Free memory was 34.0 MB in the beginning and 39.9 MB in the end (delta: -5.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.55 ms. Allocated memory is still 56.6 MB. Free memory was 39.9 MB in the beginning and 38.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.13 ms. Allocated memory is still 56.6 MB. Free memory was 38.5 MB in the beginning and 37.5 MB in the end (delta: 983.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 337.26 ms. Allocated memory is still 56.6 MB. Free memory was 37.5 MB in the beginning and 28.8 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3393.99 ms. Allocated memory was 56.6 MB in the beginning and 79.7 MB in the end (delta: 23.1 MB). Free memory was 28.3 MB in the beginning and 36.5 MB in the end (delta: -8.1 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. * Witness Printer took 59.63 ms. Allocated memory is still 79.7 MB. Free memory was 36.5 MB in the beginning and 34.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 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 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3289.1ms, OverallIterations: 4, TraceHistogramMax: 6, EmptinessCheckTime: 18.3ms, AutomataDifference: 295.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 76.4ms, InitialAbstractionConstructionTime: 11.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 29 SDtfs, 10 SDslu, 22 SDs, 0 SdLazy, 49 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 79.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 295.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=3, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 31.7ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 9 NumberOfFragments, 10 HoareAnnotationTreeSize, 2 FomulaSimplifications, 68 FormulaSimplificationTreeSizeReduction, 51.0ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 19.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 55.2ms SsaConstructionTime, 103.1ms SatisfiabilityAnalysisTime, 1038.6ms InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 231 SizeOfPredicates, 10 NumberOfNonLiveVariables, 168 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 42/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ~bvslt32(x, 0bv32) || ~bvslt32(~bvadd64(4294967295bv32, x), 10bv32) RESULT: Ultimate proved your program to be correct! [2021-10-13 08:00:12,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371e27d4-6846-4944-ae9b-0b6c36c7de3e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...