./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_3-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/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_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/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_283e6f6a-a4ca-408c-bcc0-d846ee88315f/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 e274006309db7a6ae6e7d3a14420548e35b766ad .................................................................................................................................................................................................................................................................................................................................................................................................... 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_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/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_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/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_283e6f6a-a4ca-408c-bcc0-d846ee88315f/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 e274006309db7a6ae6e7d3a14420548e35b766ad ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:57:31,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:57:31,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:57:31,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:57:31,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:57:31,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:57:31,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:57:31,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:57:31,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:57:31,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:57:31,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:57:31,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:57:31,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:57:31,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:57:31,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:57:31,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:57:31,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:57:31,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:57:31,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:57:31,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:57:31,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:57:31,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:57:31,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:57:31,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:57:31,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:57:31,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:57:31,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:57:31,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:57:31,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:57:31,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:57:31,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:57:31,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:57:31,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:57:31,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:57:31,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:57:31,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:57:31,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:57:31,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:57:31,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:57:31,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:57:31,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:57:31,496 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:57:31,528 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:57:31,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:57:31,530 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:57:31,531 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:57:31,531 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:57:31,531 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:57:31,531 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:57:31,532 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:57:31,539 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:57:31,539 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:57:31,540 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:57:31,541 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:57:31,541 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:57:31,541 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:57:31,541 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:57:31,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:57:31,542 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:57:31,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:57:31,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:57:31,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:57:31,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:57:31,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:57:31,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:57:31,544 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:57:31,544 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:57:31,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:57:31,545 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:57:31,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:57:31,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:57:31,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:57:31,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:57:31,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:57:31,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:57:31,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:57:31,549 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:57:31,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:57:31,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:57:31,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:57:31,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:57:31,550 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_283e6f6a-a4ca-408c-bcc0-d846ee88315f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e274006309db7a6ae6e7d3a14420548e35b766ad [2021-10-13 07:57:31,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:57:31,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:57:31,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:57:31,893 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:57:31,894 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:57:31,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-acceleration/array_3-1.i [2021-10-13 07:57:31,984 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/data/abadc31b0/76cf83da33d446269687c0c8471ce7ff/FLAG3dc5bb019 [2021-10-13 07:57:32,509 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:57:32,510 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/sv-benchmarks/c/loop-acceleration/array_3-1.i [2021-10-13 07:57:32,518 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/data/abadc31b0/76cf83da33d446269687c0c8471ce7ff/FLAG3dc5bb019 [2021-10-13 07:57:32,854 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/data/abadc31b0/76cf83da33d446269687c0c8471ce7ff [2021-10-13 07:57:32,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:57:32,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:57:32,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:57:32,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:57:32,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:57:32,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:57:32" (1/1) ... [2021-10-13 07:57:32,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db664b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:32, skipping insertion in model container [2021-10-13 07:57:32,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:57:32" (1/1) ... [2021-10-13 07:57:32,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:57:32,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:57:33,130 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_283e6f6a-a4ca-408c-bcc0-d846ee88315f/sv-benchmarks/c/loop-acceleration/array_3-1.i[849,862] [2021-10-13 07:57:33,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:57:33,163 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:57:33,179 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_283e6f6a-a4ca-408c-bcc0-d846ee88315f/sv-benchmarks/c/loop-acceleration/array_3-1.i[849,862] [2021-10-13 07:57:33,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:57:33,203 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:57:33,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:33 WrapperNode [2021-10-13 07:57:33,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:57:33,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:57:33,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:57:33,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:57:33,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:33" (1/1) ... [2021-10-13 07:57:33,226 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:33" (1/1) ... [2021-10-13 07:57:33,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:57:33,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:57:33,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:57:33,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:57:33,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:33" (1/1) ... [2021-10-13 07:57:33,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:33" (1/1) ... [2021-10-13 07:57:33,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:33" (1/1) ... [2021-10-13 07:57:33,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:33" (1/1) ... [2021-10-13 07:57:33,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:33" (1/1) ... [2021-10-13 07:57:33,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:33" (1/1) ... [2021-10-13 07:57:33,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:33" (1/1) ... [2021-10-13 07:57:33,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:57:33,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:57:33,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:57:33,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:57:33,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:33" (1/1) ... [2021-10-13 07:57:33,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:57:33,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:57:33,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:57:33,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:57:33,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:57:33,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:57:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:57:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:57:33,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:57:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:57:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:57:33,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:57:33,719 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:57:33,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:57:33 BoogieIcfgContainer [2021-10-13 07:57:33,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:57:33,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:57:33,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:57:33,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:57:33,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:57:32" (1/3) ... [2021-10-13 07:57:33,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b02850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:57:33, skipping insertion in model container [2021-10-13 07:57:33,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:33" (2/3) ... [2021-10-13 07:57:33,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b02850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:57:33, skipping insertion in model container [2021-10-13 07:57:33,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:57:33" (3/3) ... [2021-10-13 07:57:33,748 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2021-10-13 07:57:33,753 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:57:33,754 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:57:33,850 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:57:33,857 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:57:33,858 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:57:33,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 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 07:57:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:57:33,879 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:33,879 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:57:33,880 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:33,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1836429175, now seen corresponding path program 1 times [2021-10-13 07:57:33,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:57:33,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345516963] [2021-10-13 07:57:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:33,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:57:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:34,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:57:34,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345516963] [2021-10-13 07:57:34,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345516963] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:57:34,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:57:34,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:57:34,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458131674] [2021-10-13 07:57:34,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:57:34,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:57:34,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:57:34,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:57:34,088 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:34,104 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2021-10-13 07:57:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:57:34,106 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:57:34,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:34,116 INFO L225 Difference]: With dead ends: 17 [2021-10-13 07:57:34,116 INFO L226 Difference]: Without dead ends: 9 [2021-10-13 07:57:34,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 07:57:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-13 07:57:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-13 07:57:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) 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 07:57:34,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-10-13 07:57:34,158 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2021-10-13 07:57:34,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:34,159 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-10-13 07:57:34,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:34,160 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-10-13 07:57:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:57:34,161 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:34,161 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:34,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:57:34,162 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:34,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:34,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1108049058, now seen corresponding path program 1 times [2021-10-13 07:57:34,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:57:34,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621733754] [2021-10-13 07:57:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:34,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:57:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:34,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:57:34,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621733754] [2021-10-13 07:57:34,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621733754] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:57:34,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:57:34,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:57:34,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817247895] [2021-10-13 07:57:34,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:57:34,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:57:34,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:57:34,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:57:34,270 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) 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 07:57:34,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:34,322 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2021-10-13 07:57:34,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:57:34,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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 07:57:34,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:34,325 INFO L225 Difference]: With dead ends: 24 [2021-10-13 07:57:34,325 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 07:57:34,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:57:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 07:57:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2021-10-13 07:57:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-10-13 07:57:34,335 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2021-10-13 07:57:34,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:34,335 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-10-13 07:57:34,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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 07:57:34,336 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-10-13 07:57:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:57:34,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:34,338 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:34,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:57:34,340 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:34,347 INFO L82 PathProgramCache]: Analyzing trace with hash 36280617, now seen corresponding path program 1 times [2021-10-13 07:57:34,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:57:34,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002978594] [2021-10-13 07:57:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:34,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:57:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:34,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:57:34,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002978594] [2021-10-13 07:57:34,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002978594] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:57:34,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008284863] [2021-10-13 07:57:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:34,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:57:34,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:57:34,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:57:34,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:57:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:34,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:57:34,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:34,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:34,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008284863] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:57:34,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270894432] [2021-10-13 07:57:34,685 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-13 07:57:34,686 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:57:34,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:57:34,698 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:57:34,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:57:34,780 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:57:34,792 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:57:34,793 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:57:34,794 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:57:34,796 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:57:34,796 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:57:34,797 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:57:34,802 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-13 07:57:34,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:57:34,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:57:34,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:57:34,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 07:57:34,902 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:57:34,903 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:57:34,905 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:57:34,906 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:57:34,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:57:34,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:57:34,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:57:34,985 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:57:34,988 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-13 07:57:34,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:57:34,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:119, output treesize:122 [2021-10-13 07:57:35,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:35,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:57:35,191 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_23| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:57:35,196 INFO L168 Benchmark]: Toolchain (without parser) took 2337.17 ms. Allocated memory was 113.2 MB in the beginning and 144.7 MB in the end (delta: 31.5 MB). Free memory was 77.7 MB in the beginning and 115.0 MB in the end (delta: -37.3 MB). Peak memory consumption was 45.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:35,196 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 113.2 MB. Free memory was 87.2 MB in the beginning and 87.2 MB in the end (delta: 31.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:57:35,197 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.40 ms. Allocated memory is still 113.2 MB. Free memory was 77.5 MB in the beginning and 88.5 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:35,198 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.69 ms. Allocated memory is still 113.2 MB. Free memory was 88.5 MB in the beginning and 86.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:35,198 INFO L168 Benchmark]: Boogie Preprocessor took 28.22 ms. Allocated memory is still 113.2 MB. Free memory was 86.9 MB in the beginning and 85.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:57:35,199 INFO L168 Benchmark]: RCFGBuilder took 442.72 ms. Allocated memory is still 113.2 MB. Free memory was 85.8 MB in the beginning and 74.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:35,200 INFO L168 Benchmark]: TraceAbstraction took 1470.79 ms. Allocated memory was 113.2 MB in the beginning and 144.7 MB in the end (delta: 31.5 MB). Free memory was 74.8 MB in the beginning and 115.0 MB in the end (delta: -40.2 MB). Peak memory consumption was 46.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:35,205 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 113.2 MB. Free memory was 87.2 MB in the beginning and 87.2 MB in the end (delta: 31.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 336.40 ms. Allocated memory is still 113.2 MB. Free memory was 77.5 MB in the beginning and 88.5 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.69 ms. Allocated memory is still 113.2 MB. Free memory was 88.5 MB in the beginning and 86.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.22 ms. Allocated memory is still 113.2 MB. Free memory was 86.9 MB in the beginning and 85.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 442.72 ms. Allocated memory is still 113.2 MB. Free memory was 85.8 MB in the beginning and 74.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1470.79 ms. Allocated memory was 113.2 MB in the beginning and 144.7 MB in the end (delta: 31.5 MB). Free memory was 74.8 MB in the beginning and 115.0 MB in the end (delta: -40.2 MB). Peak memory consumption was 46.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_23| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_23|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:57:35,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:57:37,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:57:37,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:57:37,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:57:37,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:57:37,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:57:37,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:57:37,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:57:37,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:57:37,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:57:37,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:57:37,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:57:37,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:57:37,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:57:37,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:57:37,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:57:37,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:57:37,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:57:37,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:57:37,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:57:37,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:57:37,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:57:37,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:57:37,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:57:37,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:57:37,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:57:37,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:57:37,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:57:37,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:57:37,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:57:37,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:57:37,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:57:37,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:57:37,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:57:37,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:57:37,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:57:37,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:57:37,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:57:37,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:57:37,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:57:37,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:57:37,789 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:57:37,827 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:57:37,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:57:37,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:57:37,829 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:57:37,830 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:57:37,830 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:57:37,830 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:57:37,831 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:57:37,831 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:57:37,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:57:37,832 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:57:37,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:57:37,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:57:37,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:57:37,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:57:37,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:57:37,834 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:57:37,835 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:57:37,835 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:57:37,835 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:57:37,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:57:37,836 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:57:37,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:57:37,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:57:37,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:57:37,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:57:37,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:57:37,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:57:37,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:57:37,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:57:37,839 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:57:37,839 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:57:37,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:57:37,840 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:57:37,840 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:57:37,841 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_283e6f6a-a4ca-408c-bcc0-d846ee88315f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e274006309db7a6ae6e7d3a14420548e35b766ad [2021-10-13 07:57:38,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:57:38,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:57:38,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:57:38,221 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:57:38,222 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:57:38,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-acceleration/array_3-1.i [2021-10-13 07:57:38,288 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/data/d01fb26c8/90a81f6717214f9284486db0d9b8288b/FLAG5dd77b225 [2021-10-13 07:57:38,860 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:57:38,861 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/sv-benchmarks/c/loop-acceleration/array_3-1.i [2021-10-13 07:57:38,869 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/data/d01fb26c8/90a81f6717214f9284486db0d9b8288b/FLAG5dd77b225 [2021-10-13 07:57:39,223 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/data/d01fb26c8/90a81f6717214f9284486db0d9b8288b [2021-10-13 07:57:39,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:57:39,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:57:39,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:57:39,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:57:39,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:57:39,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:57:39" (1/1) ... [2021-10-13 07:57:39,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@514e088d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:39, skipping insertion in model container [2021-10-13 07:57:39,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:57:39" (1/1) ... [2021-10-13 07:57:39,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:57:39,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:57:39,560 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_283e6f6a-a4ca-408c-bcc0-d846ee88315f/sv-benchmarks/c/loop-acceleration/array_3-1.i[849,862] [2021-10-13 07:57:39,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:57:39,624 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:57:39,645 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_283e6f6a-a4ca-408c-bcc0-d846ee88315f/sv-benchmarks/c/loop-acceleration/array_3-1.i[849,862] [2021-10-13 07:57:39,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:57:39,692 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:57:39,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:39 WrapperNode [2021-10-13 07:57:39,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:57:39,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:57:39,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:57:39,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:57:39,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:39" (1/1) ... [2021-10-13 07:57:39,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:39" (1/1) ... [2021-10-13 07:57:39,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:57:39,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:57:39,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:57:39,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:57:39,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:39" (1/1) ... [2021-10-13 07:57:39,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:39" (1/1) ... [2021-10-13 07:57:39,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:39" (1/1) ... [2021-10-13 07:57:39,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:39" (1/1) ... [2021-10-13 07:57:39,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:39" (1/1) ... [2021-10-13 07:57:39,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:39" (1/1) ... [2021-10-13 07:57:39,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:39" (1/1) ... [2021-10-13 07:57:39,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:57:39,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:57:39,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:57:39,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:57:39,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:39" (1/1) ... [2021-10-13 07:57:39,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:57:39,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:57:39,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:57:39,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:57:39,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:57:39,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:57:39,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:57:39,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:57:39,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:57:39,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:57:39,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:57:40,212 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:57:40,213 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:57:40,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:57:40 BoogieIcfgContainer [2021-10-13 07:57:40,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:57:40,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:57:40,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:57:40,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:57:40,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:57:39" (1/3) ... [2021-10-13 07:57:40,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714f4a52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:57:40, skipping insertion in model container [2021-10-13 07:57:40,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:39" (2/3) ... [2021-10-13 07:57:40,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714f4a52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:57:40, skipping insertion in model container [2021-10-13 07:57:40,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:57:40" (3/3) ... [2021-10-13 07:57:40,229 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2021-10-13 07:57:40,236 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:57:40,237 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:57:40,301 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:57:40,310 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:57:40,311 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:57:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:40,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:57:40,368 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:40,369 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:40,370 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:40,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:40,377 INFO L82 PathProgramCache]: Analyzing trace with hash 212411183, now seen corresponding path program 1 times [2021-10-13 07:57:40,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:57:40,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599709805] [2021-10-13 07:57:40,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:40,395 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:57:40,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:57:40,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:57:40,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:57:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:40,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:57:40,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:40,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:40,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:57:40,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599709805] [2021-10-13 07:57:40,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599709805] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:57:40,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:57:40,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:57:40,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392978184] [2021-10-13 07:57:40,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:57:40,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:57:40,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:57:40,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:57:40,635 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:40,652 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2021-10-13 07:57:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:57:40,654 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 07:57:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:40,688 INFO L225 Difference]: With dead ends: 30 [2021-10-13 07:57:40,689 INFO L226 Difference]: Without dead ends: 13 [2021-10-13 07:57:40,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:57:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-13 07:57:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-13 07:57:40,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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 07:57:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-10-13 07:57:40,750 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-10-13 07:57:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:40,751 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-13 07:57:40,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:40,752 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-10-13 07:57:40,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:57:40,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:40,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:40,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:40,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:57:40,968 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2018507400, now seen corresponding path program 1 times [2021-10-13 07:57:40,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:57:40,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222710609] [2021-10-13 07:57:40,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:40,971 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:57:40,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:57:40,975 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:57:41,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:57:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:41,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:57:41,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:41,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:41,171 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:57:41,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222710609] [2021-10-13 07:57:41,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222710609] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:57:41,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:57:41,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:57:41,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037729157] [2021-10-13 07:57:41,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:57:41,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:57:41,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:57:41,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:57:41,180 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 07:57:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:41,271 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-10-13 07:57:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:57:41,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) Word has length 9 [2021-10-13 07:57:41,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:41,278 INFO L225 Difference]: With dead ends: 40 [2021-10-13 07:57:41,279 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 07:57:41,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:57:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 07:57:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2021-10-13 07:57:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:41,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-13 07:57:41,288 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2021-10-13 07:57:41,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:41,289 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-13 07:57:41,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 07:57:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-13 07:57:41,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:57:41,291 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:41,291 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:41,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:41,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:57:41,505 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:41,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1568667532, now seen corresponding path program 1 times [2021-10-13 07:57:41,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:57:41,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851923284] [2021-10-13 07:57:41,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:41,508 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:57:41,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:57:41,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:57:41,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:57:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:41,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:57:41,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:41,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:41,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:57:41,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851923284] [2021-10-13 07:57:41,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851923284] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:57:41,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1710406601] [2021-10-13 07:57:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:41,890 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:57:41,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:57:41,904 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:57:41,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:57:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:42,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:57:42,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:42,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:42,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1710406601] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:57:42,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4518002] [2021-10-13 07:57:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:42,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:57:42,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:57:42,175 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:57:42,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:57:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:42,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:57:42,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:57:42,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:57:42,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4518002] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:57:42,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:57:42,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 11 [2021-10-13 07:57:42,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123824331] [2021-10-13 07:57:42,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:57:42,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:57:42,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:57:42,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:57:42,556 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:42,711 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-10-13 07:57:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:57:42,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 07:57:42,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:42,713 INFO L225 Difference]: With dead ends: 29 [2021-10-13 07:57:42,713 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 07:57:42,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:57:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 07:57:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-13 07:57:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:42,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-10-13 07:57:42,724 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 13 [2021-10-13 07:57:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:42,725 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-10-13 07:57:42,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:42,725 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-10-13 07:57:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:57:42,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:42,726 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:42,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:42,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:43,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 07:57:43,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:57:43,349 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:43,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:43,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1088783962, now seen corresponding path program 1 times [2021-10-13 07:57:43,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:57:43,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928683091] [2021-10-13 07:57:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:43,351 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:57:43,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:57:43,359 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:57:43,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:57:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:43,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:57:43,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 07:57:43,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 07:57:43,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:57:43,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928683091] [2021-10-13 07:57:43,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928683091] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:57:43,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [976946987] [2021-10-13 07:57:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:43,689 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:57:43,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:57:43,691 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:57:43,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 07:57:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:57:43,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 07:57:43,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 07:57:43,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [976946987] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:57:43,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87310495] [2021-10-13 07:57:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:43,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:57:43,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:57:43,981 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:57:43,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 07:57:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:44,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:57:44,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:57:44,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:57:44,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87310495] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:57:44,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:57:44,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 13 [2021-10-13 07:57:44,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137035187] [2021-10-13 07:57:44,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 07:57:44,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:57:44,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 07:57:44,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:57:44,364 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:44,731 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2021-10-13 07:57:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 07:57:44,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 21 [2021-10-13 07:57:44,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:44,732 INFO L225 Difference]: With dead ends: 63 [2021-10-13 07:57:44,732 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:57:44,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-10-13 07:57:44,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:57:44,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:57:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:57:44,735 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-10-13 07:57:44,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:44,735 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:57:44,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:44,735 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:57:44,735 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:57:44,738 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:57:44,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:44,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-13 07:57:45,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:45,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:57:45,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:57:45,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:57:45,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:57:45,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:57:45,420 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:57:45,420 INFO L857 garLoopResultBuilder]: For program point L29(lines 29 31) no Hoare annotation was computed. [2021-10-13 07:57:45,421 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-10-13 07:57:45,421 INFO L860 garLoopResultBuilder]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2021-10-13 07:57:45,421 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 07:57:45,421 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:57:45,422 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 07:57:45,422 INFO L857 garLoopResultBuilder]: For program point L28-1(lines 28 32) no Hoare annotation was computed. [2021-10-13 07:57:45,422 INFO L857 garLoopResultBuilder]: For program point L28-3(lines 28 32) no Hoare annotation was computed. [2021-10-13 07:57:45,422 INFO L853 garLoopResultBuilder]: At program point L28-4(lines 28 32) the Hoare annotation is: (bvslt ULTIMATE.start_main_~i~0 (_ bv1024 32)) [2021-10-13 07:57:45,422 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-10-13 07:57:45,422 INFO L857 garLoopResultBuilder]: For program point L28-5(lines 28 32) no Hoare annotation was computed. [2021-10-13 07:57:45,423 INFO L857 garLoopResultBuilder]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2021-10-13 07:57:45,423 INFO L853 garLoopResultBuilder]: At program point L24-3(lines 24 26) the Hoare annotation is: (bvsle ULTIMATE.start_main_~i~0 (_ bv1024 32)) [2021-10-13 07:57:45,423 INFO L857 garLoopResultBuilder]: For program point L24-4(lines 24 26) no Hoare annotation was computed. [2021-10-13 07:57:45,423 INFO L857 garLoopResultBuilder]: For program point L20(lines 20 34) no Hoare annotation was computed. [2021-10-13 07:57:45,423 INFO L857 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-10-13 07:57:45,426 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:57:45,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:57:45 BoogieIcfgContainer [2021-10-13 07:57:45,435 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:57:45,435 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:57:45,436 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:57:45,436 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:57:45,437 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:57:40" (3/4) ... [2021-10-13 07:57:45,440 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:57:45,448 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-13 07:57:45,449 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:57:45,449 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-13 07:57:45,449 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:57:45,500 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:57:45,500 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:57:45,502 INFO L168 Benchmark]: Toolchain (without parser) took 6260.44 ms. Allocated memory was 79.7 MB in the beginning and 111.1 MB in the end (delta: 31.5 MB). Free memory was 45.5 MB in the beginning and 73.9 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:45,503 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 79.7 MB. Free memory was 62.1 MB in the beginning and 62.0 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:57:45,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 449.57 ms. Allocated memory is still 79.7 MB. Free memory was 45.3 MB in the beginning and 63.0 MB in the end (delta: -17.7 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:45,504 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.07 ms. Allocated memory is still 79.7 MB. Free memory was 63.0 MB in the beginning and 61.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:57:45,505 INFO L168 Benchmark]: Boogie Preprocessor took 55.37 ms. Allocated memory is still 79.7 MB. Free memory was 61.6 MB in the beginning and 60.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:45,506 INFO L168 Benchmark]: RCFGBuilder took 410.38 ms. Allocated memory is still 79.7 MB. Free memory was 60.4 MB in the beginning and 50.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:45,507 INFO L168 Benchmark]: TraceAbstraction took 5216.19 ms. Allocated memory was 79.7 MB in the beginning and 111.1 MB in the end (delta: 31.5 MB). Free memory was 50.3 MB in the beginning and 76.4 MB in the end (delta: -26.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:45,508 INFO L168 Benchmark]: Witness Printer took 64.62 ms. Allocated memory is still 111.1 MB. Free memory was 76.4 MB in the beginning and 73.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:45,512 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 79.7 MB. Free memory was 62.1 MB in the beginning and 62.0 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 449.57 ms. Allocated memory is still 79.7 MB. Free memory was 45.3 MB in the beginning and 63.0 MB in the end (delta: -17.7 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.07 ms. Allocated memory is still 79.7 MB. Free memory was 63.0 MB in the beginning and 61.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.37 ms. Allocated memory is still 79.7 MB. Free memory was 61.6 MB in the beginning and 60.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 410.38 ms. Allocated memory is still 79.7 MB. Free memory was 60.4 MB in the beginning and 50.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5216.19 ms. Allocated memory was 79.7 MB in the beginning and 111.1 MB in the end (delta: 31.5 MB). Free memory was 50.3 MB in the beginning and 76.4 MB in the end (delta: -26.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Witness Printer took 64.62 ms. Allocated memory is still 111.1 MB. Free memory was 76.4 MB in the beginning and 73.9 MB in the end (delta: 2.5 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, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5128.5ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 31.4ms, AutomataDifference: 719.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 70.1ms, InitialAbstractionConstructionTime: 28.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 42 SDtfs, 145 SDslu, 54 SDs, 0 SdLazy, 158 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 299.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 232 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 464.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=3, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 56.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 12 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 16 NumberOfFragments, 7 HoareAnnotationTreeSize, 3 FomulaSimplifications, 46 FormulaSimplificationTreeSizeReduction, 47.7ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 16.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 97.1ms SsaConstructionTime, 205.6ms SatisfiabilityAnalysisTime, 1510.5ms InterpolantComputationTime, 119 NumberOfCodeBlocks, 119 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 222 ConstructedInterpolants, 0 QuantifiedInterpolants, 420 SizeOfPredicates, 10 NumberOfNonLiveVariables, 315 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 48/96 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: 24]: Loop Invariant Derived loop invariant: NULL - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: NULL - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-13 07:57:45,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283e6f6a-a4ca-408c-bcc0-d846ee88315f/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...