./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan --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 f7920dae4fa1aaae1d36ed15e0c19f03a8ddeadf ........................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan --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 f7920dae4fa1aaae1d36ed15e0c19f03a8ddeadf ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 04:31:41,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:31:41,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:31:41,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:31:41,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:31:41,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:31:41,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:31:41,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:31:41,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:31:41,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:31:41,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:31:41,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:31:41,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:31:41,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:31:41,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:31:41,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:31:41,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:31:41,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:31:41,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:31:41,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:31:41,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:31:41,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:31:41,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:31:41,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:31:41,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:31:41,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:31:41,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:31:41,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:31:41,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:31:41,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:31:41,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:31:41,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:31:41,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:31:41,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:31:41,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:31:41,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:31:41,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:31:41,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:31:41,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:31:41,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:31:41,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:31:41,667 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 04:31:41,690 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:31:41,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:31:41,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:31:41,691 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:31:41,692 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:31:41,692 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:31:41,692 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 04:31:41,692 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:31:41,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:31:41,692 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 04:31:41,692 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 04:31:41,692 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:31:41,693 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 04:31:41,693 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 04:31:41,693 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 04:31:41,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:31:41,694 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:31:41,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 04:31:41,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:31:41,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:31:41,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 04:31:41,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:31:41,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 04:31:41,694 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:31:41,694 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:31:41,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 04:31:41,695 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:31:41,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 04:31:41,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:31:41,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:31:41,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:31:41,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:31:41,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:31:41,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 04:31:41,696 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 04:31:41,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 04:31:41,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 04:31:41,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:31:41,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:31:41,697 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-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7920dae4fa1aaae1d36ed15e0c19f03a8ddeadf [2020-12-09 04:31:41,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:31:41,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:31:41,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:31:41,902 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:31:41,903 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:31:41,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2020-12-09 04:31:41,943 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/data/06f34ce44/bc71e6b5636a4f14b82e5c35edfa067c/FLAGe8bf7b804 [2020-12-09 04:31:42,301 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:31:42,301 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2020-12-09 04:31:42,306 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/data/06f34ce44/bc71e6b5636a4f14b82e5c35edfa067c/FLAGe8bf7b804 [2020-12-09 04:31:42,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/data/06f34ce44/bc71e6b5636a4f14b82e5c35edfa067c [2020-12-09 04:31:42,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:31:42,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:31:42,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:31:42,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:31:42,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:31:42,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:31:42" (1/1) ... [2020-12-09 04:31:42,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68163704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:31:42, skipping insertion in model container [2020-12-09 04:31:42,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:31:42" (1/1) ... [2020-12-09 04:31:42,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:31:42,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:31:42,441 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2020-12-09 04:31:42,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:31:42,463 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:31:42,472 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2020-12-09 04:31:42,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:31:42,492 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:31:42,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:31:42 WrapperNode [2020-12-09 04:31:42,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:31:42,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:31:42,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:31:42,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:31:42,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:31:42" (1/1) ... [2020-12-09 04:31:42,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:31:42" (1/1) ... [2020-12-09 04:31:42,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:31:42,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:31:42,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:31:42,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:31:42,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:31:42" (1/1) ... [2020-12-09 04:31:42,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:31:42" (1/1) ... [2020-12-09 04:31:42,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:31:42" (1/1) ... [2020-12-09 04:31:42,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:31:42" (1/1) ... [2020-12-09 04:31:42,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:31:42" (1/1) ... [2020-12-09 04:31:42,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:31:42" (1/1) ... [2020-12-09 04:31:42,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:31:42" (1/1) ... [2020-12-09 04:31:42,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:31:42,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:31:42,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:31:42,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:31:42,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:31:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:31:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 04:31:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:31:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:31:42,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:31:42,824 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:31:42,824 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 04:31:42,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:31:42 BoogieIcfgContainer [2020-12-09 04:31:42,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:31:42,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:31:42,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:31:42,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:31:42,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:31:42" (1/3) ... [2020-12-09 04:31:42,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ae55a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:31:42, skipping insertion in model container [2020-12-09 04:31:42,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:31:42" (2/3) ... [2020-12-09 04:31:42,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ae55a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:31:42, skipping insertion in model container [2020-12-09 04:31:42,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:31:42" (3/3) ... [2020-12-09 04:31:42,833 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound5.c [2020-12-09 04:31:42,845 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:31:42,848 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 04:31:42,858 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 04:31:42,878 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:31:42,878 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 04:31:42,878 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:31:42,878 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:31:42,878 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:31:42,878 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:31:42,878 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:31:42,878 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:31:42,888 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-09 04:31:42,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 04:31:42,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:31:42,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 04:31:42,891 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:31:42,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:31:42,897 INFO L82 PathProgramCache]: Analyzing trace with hash 93462408, now seen corresponding path program 1 times [2020-12-09 04:31:42,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:31:42,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133470666] [2020-12-09 04:31:42,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:31:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:31:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:31:43,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133470666] [2020-12-09 04:31:43,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:31:43,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 04:31:43,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186645247] [2020-12-09 04:31:43,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 04:31:43,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:31:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 04:31:43,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 04:31:43,047 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-09 04:31:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:31:43,058 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2020-12-09 04:31:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 04:31:43,059 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 04:31:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:31:43,065 INFO L225 Difference]: With dead ends: 33 [2020-12-09 04:31:43,065 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 04:31:43,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 04:31:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 04:31:43,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 04:31:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 04:31:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-09 04:31:43,089 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2020-12-09 04:31:43,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:31:43,090 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-09 04:31:43,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 04:31:43,090 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-09 04:31:43,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 04:31:43,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:31:43,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 04:31:43,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 04:31:43,091 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:31:43,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:31:43,091 INFO L82 PathProgramCache]: Analyzing trace with hash 92788139, now seen corresponding path program 1 times [2020-12-09 04:31:43,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:31:43,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770063253] [2020-12-09 04:31:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:31:43,105 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:31:43,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710501484] [2020-12-09 04:31:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:31:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:31:43,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 04:31:43,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:31:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:31:43,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:31:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:31:43,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770063253] [2020-12-09 04:31:43,245 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:31:43,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710501484] [2020-12-09 04:31:43,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:31:43,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 04:31:43,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801075401] [2020-12-09 04:31:43,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 04:31:43,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:31:43,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 04:31:43,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:31:43,248 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2020-12-09 04:31:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:31:45,436 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-12-09 04:31:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 04:31:45,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 04:31:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:31:45,437 INFO L225 Difference]: With dead ends: 43 [2020-12-09 04:31:45,437 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 04:31:45,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:31:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 04:31:45,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-12-09 04:31:45,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 04:31:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-09 04:31:45,443 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 5 [2020-12-09 04:31:45,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:31:45,444 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-09 04:31:45,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 04:31:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-09 04:31:45,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 04:31:45,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:31:45,445 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:31:45,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 04:31:45,647 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:31:45,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:31:45,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1170197384, now seen corresponding path program 1 times [2020-12-09 04:31:45,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:31:45,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772423720] [2020-12-09 04:31:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:31:45,685 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:31:45,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298512562] [2020-12-09 04:31:45,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:31:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:31:45,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 04:31:45,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:31:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:31:45,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:31:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:31:45,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772423720] [2020-12-09 04:31:45,790 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:31:45,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298512562] [2020-12-09 04:31:45,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1608265204] [2020-12-09 04:31:45,806 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 04:31:45,806 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:31:45,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:31:45,813 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:31:45,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:31:45,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:31:46,133 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:31:46,666 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-12-09 04:31:53,212 WARN L197 SmtUtils]: Spent 4.21 s on a formula simplification that was a NOOP. DAG size: 64 [2020-12-09 04:31:55,596 WARN L197 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-09 04:32:00,166 WARN L197 SmtUtils]: Spent 4.46 s on a formula simplification that was a NOOP. DAG size: 66 [2020-12-09 04:32:04,476 WARN L197 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-12-09 04:32:12,408 WARN L197 SmtUtils]: Spent 7.85 s on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-12-09 04:32:12,409 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:32:12,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 04:32:12,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-09 04:32:12,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88116977] [2020-12-09 04:32:12,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 04:32:12,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:32:12,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 04:32:12,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=218, Unknown=1, NotChecked=0, Total=272 [2020-12-09 04:32:12,411 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 8 states. [2020-12-09 04:32:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:32:12,467 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-12-09 04:32:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 04:32:12,467 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-09 04:32:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:32:12,468 INFO L225 Difference]: With dead ends: 55 [2020-12-09 04:32:12,468 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 04:32:12,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=73, Invalid=306, Unknown=1, NotChecked=0, Total=380 [2020-12-09 04:32:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 04:32:12,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2020-12-09 04:32:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 04:32:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-09 04:32:12,473 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 12 [2020-12-09 04:32:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:32:12,473 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-09 04:32:12,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 04:32:12,473 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-09 04:32:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 04:32:12,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:32:12,474 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2020-12-09 04:32:12,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:32:12,675 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:32:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:32:12,676 INFO L82 PathProgramCache]: Analyzing trace with hash -468451453, now seen corresponding path program 1 times [2020-12-09 04:32:12,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:32:12,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515062099] [2020-12-09 04:32:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:32:12,685 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:32:12,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783201380] [2020-12-09 04:32:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:32:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:32:12,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 04:32:12,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:32:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:32:12,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:32:12,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515062099] [2020-12-09 04:32:12,928 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:32:12,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783201380] [2020-12-09 04:32:12,928 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-09 04:32:12,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [850810227] [2020-12-09 04:32:12,935 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 04:32:12,935 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:32:12,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:32:12,936 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:32:12,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:32:12,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:32:15,171 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:32:30,137 WARN L197 SmtUtils]: Spent 12.88 s on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-12-09 04:32:33,507 WARN L197 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-12-09 04:32:43,355 WARN L197 SmtUtils]: Spent 9.73 s on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-09 04:32:43,356 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:32:43,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:32:43,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 04:32:43,357 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 04:32:43,357 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 04:32:43,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-09 04:32:43,571 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 04:32:43,572 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 04:32:43,596 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 04:32:43,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:32:43 BoogieIcfgContainer [2020-12-09 04:32:43,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:32:43,598 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:32:43,598 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:32:43,599 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:32:43,599 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:31:42" (3/4) ... [2020-12-09 04:32:43,603 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 04:32:43,603 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:32:43,605 INFO L168 Benchmark]: Toolchain (without parser) took 61286.43 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 66.2 MB in the beginning and 68.7 MB in the end (delta: -2.5 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:32:43,606 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 96.5 MB. Free memory is still 73.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:32:43,606 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.50 ms. Allocated memory is still 96.5 MB. Free memory was 66.0 MB in the beginning and 56.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 04:32:43,607 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.71 ms. Allocated memory is still 96.5 MB. Free memory was 56.1 MB in the beginning and 54.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:32:43,608 INFO L168 Benchmark]: Boogie Preprocessor took 20.97 ms. Allocated memory is still 96.5 MB. Free memory was 54.5 MB in the beginning and 53.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:32:43,608 INFO L168 Benchmark]: RCFGBuilder took 278.25 ms. Allocated memory is still 96.5 MB. Free memory was 53.4 MB in the beginning and 59.2 MB in the end (delta: -5.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 04:32:43,609 INFO L168 Benchmark]: TraceAbstraction took 60769.77 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 58.8 MB in the beginning and 68.7 MB in the end (delta: -9.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2020-12-09 04:32:43,609 INFO L168 Benchmark]: Witness Printer took 5.48 ms. Allocated memory is still 117.4 MB. Free memory is still 68.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:32:43,613 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 96.5 MB. Free memory is still 73.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 174.50 ms. Allocated memory is still 96.5 MB. Free memory was 66.0 MB in the beginning and 56.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.71 ms. Allocated memory is still 96.5 MB. Free memory was 56.1 MB in the beginning and 54.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.97 ms. Allocated memory is still 96.5 MB. Free memory was 54.5 MB in the beginning and 53.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 278.25 ms. Allocated memory is still 96.5 MB. Free memory was 53.4 MB in the beginning and 59.2 MB in the end (delta: -5.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 60769.77 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 58.8 MB in the beginning and 68.7 MB in the end (delta: -9.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * Witness Printer took 5.48 ms. Allocated memory is still 117.4 MB. Free memory is still 68.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L7] COND TRUE !cond [L24] y = 0 [L25] x = 0 [L26] c = 0 [L28] EXPR counter++ [L28] COND TRUE counter++<5 [L10] COND FALSE !(!(cond)) [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x [L28] EXPR counter++ [L28] COND TRUE counter++<5 [L10] COND FALSE !(!(cond)) [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x [L28] EXPR counter++ [L28] COND TRUE counter++<5 [L10] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 60.6s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 44 SDtfs, 56 SDslu, 83 SDs, 0 SdLazy, 41 SolverSat, 26 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 26.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 21 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 838 SizeOfPredicates, 7 NumberOfNonLiveVariables, 138 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 04:32:45,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:32:45,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:32:45,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:32:45,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:32:45,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:32:45,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:32:45,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:32:45,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:32:45,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:32:45,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:32:45,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:32:45,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:32:45,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:32:45,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:32:45,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:32:45,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:32:45,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:32:45,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:32:45,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:32:45,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:32:45,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:32:45,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:32:45,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:32:45,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:32:45,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:32:45,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:32:45,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:32:45,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:32:45,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:32:45,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:32:45,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:32:45,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:32:45,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:32:45,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:32:45,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:32:45,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:32:45,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:32:45,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:32:45,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:32:45,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:32:45,102 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 04:32:45,125 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:32:45,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:32:45,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:32:45,126 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:32:45,126 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:32:45,126 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:32:45,126 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:32:45,126 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:32:45,126 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:32:45,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:32:45,127 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:32:45,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:32:45,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:32:45,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 04:32:45,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:32:45,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 04:32:45,128 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:32:45,128 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 04:32:45,128 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 04:32:45,129 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:32:45,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 04:32:45,129 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:32:45,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 04:32:45,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:32:45,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 04:32:45,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:32:45,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:32:45,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:32:45,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:32:45,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 04:32:45,130 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 04:32:45,130 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 04:32:45,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 04:32:45,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:32:45,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:32:45,131 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-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7920dae4fa1aaae1d36ed15e0c19f03a8ddeadf [2020-12-09 04:32:45,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:32:45,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:32:45,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:32:45,381 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:32:45,382 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:32:45,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2020-12-09 04:32:45,423 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/data/239d16bd3/17e7fc7880b442a08c6741209691a503/FLAGb665f3c22 [2020-12-09 04:32:45,813 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:32:45,814 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2020-12-09 04:32:45,818 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/data/239d16bd3/17e7fc7880b442a08c6741209691a503/FLAGb665f3c22 [2020-12-09 04:32:45,828 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/data/239d16bd3/17e7fc7880b442a08c6741209691a503 [2020-12-09 04:32:45,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:32:45,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:32:45,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:32:45,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:32:45,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:32:45,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:32:45" (1/1) ... [2020-12-09 04:32:45,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e6cfec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:32:45, skipping insertion in model container [2020-12-09 04:32:45,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:32:45" (1/1) ... [2020-12-09 04:32:45,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:32:45,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:32:45,943 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2020-12-09 04:32:45,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:32:45,964 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:32:45,973 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2020-12-09 04:32:45,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:32:45,989 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:32:45,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:32:45 WrapperNode [2020-12-09 04:32:45,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:32:45,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:32:45,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:32:45,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:32:45,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:32:45" (1/1) ... [2020-12-09 04:32:46,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:32:45" (1/1) ... [2020-12-09 04:32:46,034 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:32:46,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:32:46,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:32:46,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:32:46,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:32:45" (1/1) ... [2020-12-09 04:32:46,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:32:45" (1/1) ... [2020-12-09 04:32:46,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:32:45" (1/1) ... [2020-12-09 04:32:46,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:32:45" (1/1) ... [2020-12-09 04:32:46,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:32:45" (1/1) ... [2020-12-09 04:32:46,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:32:45" (1/1) ... [2020-12-09 04:32:46,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:32:45" (1/1) ... [2020-12-09 04:32:46,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:32:46,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:32:46,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:32:46,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:32:46,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:32:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:32:46,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 04:32:46,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:32:46,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:32:46,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:32:47,013 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:32:47,013 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 04:32:47,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:32:47 BoogieIcfgContainer [2020-12-09 04:32:47,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:32:47,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:32:47,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:32:47,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:32:47,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:32:45" (1/3) ... [2020-12-09 04:32:47,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15991770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:32:47, skipping insertion in model container [2020-12-09 04:32:47,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:32:45" (2/3) ... [2020-12-09 04:32:47,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15991770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:32:47, skipping insertion in model container [2020-12-09 04:32:47,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:32:47" (3/3) ... [2020-12-09 04:32:47,019 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound5.c [2020-12-09 04:32:47,029 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:32:47,032 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 04:32:47,039 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 04:32:47,059 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:32:47,059 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 04:32:47,059 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:32:47,060 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:32:47,060 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:32:47,060 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:32:47,060 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:32:47,060 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:32:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-09 04:32:47,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 04:32:47,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:32:47,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:32:47,072 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:32:47,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:32:47,076 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2020-12-09 04:32:47,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:32:47,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728229033] [2020-12-09 04:32:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 04:32:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:32:47,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 04:32:47,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:32:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:32:47,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:32:47,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728229033] [2020-12-09 04:32:47,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:32:47,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 04:32:47,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612665222] [2020-12-09 04:32:47,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 04:32:47,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:32:47,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 04:32:47,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 04:32:47,297 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-09 04:32:47,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:32:47,308 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-12-09 04:32:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 04:32:47,309 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 04:32:47,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:32:47,315 INFO L225 Difference]: With dead ends: 41 [2020-12-09 04:32:47,315 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 04:32:47,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 04:32:47,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 04:32:47,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-09 04:32:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 04:32:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-09 04:32:47,340 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-12-09 04:32:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:32:47,340 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-09 04:32:47,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 04:32:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-09 04:32:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 04:32:47,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:32:47,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:32:47,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 04:32:47,542 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:32:47,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:32:47,543 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-09 04:32:47,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:32:47,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666239964] [2020-12-09 04:32:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 04:32:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:32:47,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 04:32:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:32:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:32:47,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:32:47,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666239964] [2020-12-09 04:32:47,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:32:47,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 04:32:47,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53973086] [2020-12-09 04:32:47,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:32:47,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:32:47,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:32:47,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:32:47,823 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-12-09 04:32:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:32:50,012 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-09 04:32:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:32:50,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 04:32:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:32:50,013 INFO L225 Difference]: With dead ends: 36 [2020-12-09 04:32:50,013 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 04:32:50,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:32:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 04:32:50,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-09 04:32:50,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 04:32:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-09 04:32:50,019 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2020-12-09 04:32:50,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:32:50,019 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-09 04:32:50,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:32:50,019 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-09 04:32:50,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 04:32:50,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:32:50,020 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:32:50,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 04:32:50,222 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:32:50,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:32:50,224 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2020-12-09 04:32:50,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:32:50,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321566418] [2020-12-09 04:32:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 04:32:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:32:50,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 04:32:50,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:32:51,501 WARN L197 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-09 04:32:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:32:51,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:32:55,253 WARN L197 SmtUtils]: Spent 957.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 04:32:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 04:32:56,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321566418] [2020-12-09 04:32:56,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1108140596] [2020-12-09 04:32:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt [2020-12-09 04:32:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:32:57,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 04:32:57,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:32:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:32:57,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:33:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 04:33:00,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403556215] [2020-12-09 04:33:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:33:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:33:01,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 04:33:01,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:33:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:33:02,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:33:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 04:33:04,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 04:33:04,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 6, 4] total 8 [2020-12-09 04:33:04,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400205499] [2020-12-09 04:33:04,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 04:33:04,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:33:04,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 04:33:04,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:33:04,113 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-12-09 04:33:06,631 WARN L197 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 04:33:12,476 WARN L197 SmtUtils]: Spent 3.47 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 04:33:13,250 WARN L197 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 04:33:20,220 WARN L197 SmtUtils]: Spent 2.55 s on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 04:33:20,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:33:20,222 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-09 04:33:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 04:33:20,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-09 04:33:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:33:20,223 INFO L225 Difference]: With dead ends: 32 [2020-12-09 04:33:20,223 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 04:33:20,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-09 04:33:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 04:33:20,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2020-12-09 04:33:20,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 04:33:20,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-09 04:33:20,232 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2020-12-09 04:33:20,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:33:20,232 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-09 04:33:20,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 04:33:20,232 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-09 04:33:20,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 04:33:20,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:33:20,233 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:33:20,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 cvc4 --incremental --print-success --lang smt [2020-12-09 04:33:20,837 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:33:20,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:33:20,838 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2020-12-09 04:33:20,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:33:20,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902037435] [2020-12-09 04:33:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 04:33:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:33:21,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 04:33:21,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:33:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:33:21,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:33:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:33:21,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902037435] [2020-12-09 04:33:21,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [244157911] [2020-12-09 04:33:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt [2020-12-09 04:33:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:33:22,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 04:33:22,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:33:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:33:22,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:33:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:33:22,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970951487] [2020-12-09 04:33:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:33:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:33:23,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 04:33:23,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:33:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:33:23,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:33:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:33:23,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 04:33:23,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2020-12-09 04:33:23,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627434731] [2020-12-09 04:33:23,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 04:33:23,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:33:23,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 04:33:23,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:33:23,359 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-12-09 04:33:25,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:33:25,674 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-12-09 04:33:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 04:33:25,675 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-09 04:33:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:33:25,676 INFO L225 Difference]: With dead ends: 46 [2020-12-09 04:33:25,676 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 04:33:25,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-09 04:33:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 04:33:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2020-12-09 04:33:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 04:33:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-09 04:33:25,685 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 15 [2020-12-09 04:33:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:33:25,685 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-09 04:33:25,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 04:33:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-09 04:33:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 04:33:25,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:33:25,686 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:33:26,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt [2020-12-09 04:33:26,290 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:33:26,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:33:26,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2020-12-09 04:33:26,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:33:26,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441867105] [2020-12-09 04:33:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 04:33:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:33:26,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 04:33:26,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:33:27,021 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 04:33:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:33:27,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:33:28,180 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-09 04:33:29,643 WARN L197 SmtUtils]: Spent 570.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-09 04:33:31,195 WARN L197 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 04:33:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:33:31,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441867105] [2020-12-09 04:33:31,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1803693761] [2020-12-09 04:33:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt [2020-12-09 04:33:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:33:32,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 04:33:32,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:33:32,205 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 04:33:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:33:32,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:33:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:33:33,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884940641] [2020-12-09 04:33:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:33:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:33:34,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 04:33:34,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:33:36,099 WARN L197 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 04:33:39,115 WARN L197 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2020-12-09 04:33:39,164 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 04:33:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:33:39,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:33:40,739 WARN L197 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 04:33:40,752 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 04:33:40,752 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 04:33:50,953 WARN L197 SmtUtils]: Spent 2.68 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 04:33:57,892 WARN L197 SmtUtils]: Spent 2.69 s on a formula simplification that was a NOOP. DAG size: 71 [2020-12-09 04:33:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:33:57,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 04:33:57,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6, 6, 10, 8] total 21 [2020-12-09 04:33:57,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096212033] [2020-12-09 04:33:57,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-09 04:33:57,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:33:57,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-09 04:33:57,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-12-09 04:33:57,948 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 21 states. [2020-12-09 04:34:02,247 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-12-09 04:34:02,540 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-12-09 04:34:05,014 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-09 04:34:06,626 WARN L197 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2020-12-09 04:34:12,962 WARN L197 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-12-09 04:34:18,983 WARN L197 SmtUtils]: Spent 2.73 s on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-09 04:34:22,635 WARN L197 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-12-09 04:34:27,605 WARN L197 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-12-09 04:34:34,764 WARN L197 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-12-09 04:34:41,795 WARN L197 SmtUtils]: Spent 2.97 s on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-12-09 04:34:45,014 WARN L197 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-12-09 04:34:50,840 WARN L197 SmtUtils]: Spent 3.60 s on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-12-09 04:34:55,301 WARN L197 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-09 04:35:03,486 WARN L197 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-09 04:35:08,505 WARN L197 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-12-09 04:35:14,229 WARN L197 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-12-09 04:35:18,062 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-12-09 04:35:21,989 WARN L197 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-09 04:35:27,944 WARN L197 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-09 04:35:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:35:28,410 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-09 04:35:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-09 04:35:28,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 17 [2020-12-09 04:35:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:35:28,424 INFO L225 Difference]: With dead ends: 50 [2020-12-09 04:35:28,425 INFO L226 Difference]: Without dead ends: 36 [2020-12-09 04:35:28,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 92.5s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-12-09 04:35:28,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-09 04:35:28,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-12-09 04:35:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 04:35:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-09 04:35:28,433 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 17 [2020-12-09 04:35:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:35:28,433 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-09 04:35:28,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-09 04:35:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-09 04:35:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 04:35:28,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:35:28,434 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:35:29,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt [2020-12-09 04:35:29,038 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:35:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:35:29,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1901162899, now seen corresponding path program 2 times [2020-12-09 04:35:29,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:35:29,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239554718] [2020-12-09 04:35:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-09 04:35:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:35:30,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 04:35:30,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:35:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:35:30,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:35:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:35:30,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239554718] [2020-12-09 04:35:30,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2047388714] [2020-12-09 04:35:30,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt [2020-12-09 04:35:32,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 04:35:32,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 04:35:32,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 04:35:32,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:35:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:35:32,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:35:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:35:32,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745184184] [2020-12-09 04:35:32,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:35:33,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 04:35:33,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 04:35:34,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 04:35:34,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:35:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:35:34,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:35:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:35:34,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 04:35:34,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 19 [2020-12-09 04:35:34,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561499823] [2020-12-09 04:35:34,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-09 04:35:34,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:35:34,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-09 04:35:34,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-12-09 04:35:34,838 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 20 states. [2020-12-09 04:35:38,355 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 04:35:39,329 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-09 04:35:39,539 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 04:35:40,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:35:40,970 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-12-09 04:35:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-09 04:35:40,999 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-12-09 04:35:40,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:35:41,000 INFO L225 Difference]: With dead ends: 94 [2020-12-09 04:35:41,000 INFO L226 Difference]: Without dead ends: 88 [2020-12-09 04:35:41,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2020-12-09 04:35:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-09 04:35:41,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 52. [2020-12-09 04:35:41,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 04:35:41,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-12-09 04:35:41,012 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 27 [2020-12-09 04:35:41,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:35:41,012 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-12-09 04:35:41,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-09 04:35:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-12-09 04:35:41,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-09 04:35:41,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:35:41,013 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:35:41,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt,13 mathsat -unsat_core_generation=3,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:35:41,616 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:35:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:35:41,618 INFO L82 PathProgramCache]: Analyzing trace with hash -736656116, now seen corresponding path program 2 times [2020-12-09 04:35:41,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:35:41,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83918681] [2020-12-09 04:35:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-12-09 04:35:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:35:42,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 04:35:42,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:35:43,435 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 04:35:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:35:43,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:35:45,258 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-09 04:35:46,573 WARN L197 SmtUtils]: Spent 621.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-09 04:35:48,450 WARN L197 SmtUtils]: Spent 774.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 04:35:52,016 WARN L197 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-12-09 04:35:54,962 WARN L197 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-09 04:35:58,392 WARN L197 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-09 04:35:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:35:58,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83918681] [2020-12-09 04:35:58,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [795867995] [2020-12-09 04:35:58,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt [2020-12-09 04:36:00,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 04:36:00,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 04:36:00,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 04:36:00,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:36:00,915 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 04:36:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:36:00,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:36:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:36:00,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024316303] [2020-12-09 04:36:00,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:36:02,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 04:36:02,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 04:36:02,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-09 04:36:02,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:36:03,619 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 04:36:06,052 WARN L197 SmtUtils]: Spent 996.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-09 04:36:11,739 WARN L197 SmtUtils]: Spent 3.39 s on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-12-09 04:36:14,020 WARN L197 SmtUtils]: Spent 751.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-09 04:36:16,628 WARN L197 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-12-09 04:36:20,240 WARN L197 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 74 DAG size of output: 28 [2020-12-09 04:36:20,308 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 04:36:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:36:20,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:36:22,912 WARN L197 SmtUtils]: Spent 663.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 04:36:22,917 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 04:36:22,917 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 04:36:34,532 WARN L197 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 04:36:46,051 WARN L197 SmtUtils]: Spent 3.07 s on a formula simplification that was a NOOP. DAG size: 71 [2020-12-09 04:37:00,672 WARN L197 SmtUtils]: Spent 3.79 s on a formula simplification that was a NOOP. DAG size: 85 [2020-12-09 04:37:15,463 WARN L197 SmtUtils]: Spent 3.69 s on a formula simplification that was a NOOP. DAG size: 87 [2020-12-09 04:37:15,473 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 04:37:15,473 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 04:37:36,724 WARN L197 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 91 [2020-12-09 04:37:54,180 WARN L197 SmtUtils]: Spent 6.79 s on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-12-09 04:37:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:37:54,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 04:37:54,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 14, 12] total 34 [2020-12-09 04:37:54,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100670012] [2020-12-09 04:37:54,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-09 04:37:54,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:37:54,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-09 04:37:54,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-12-09 04:37:54,241 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 34 states. [2020-12-09 04:38:07,234 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-12-09 04:38:07,620 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-12-09 04:38:11,897 WARN L197 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-09 04:38:15,827 WARN L197 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-09 04:38:21,846 WARN L197 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-12-09 04:38:25,232 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-09 04:38:26,992 WARN L197 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 04:38:38,893 WARN L197 SmtUtils]: Spent 6.62 s on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-12-09 04:38:49,063 WARN L197 SmtUtils]: Spent 8.00 s on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-12-09 04:38:56,992 WARN L197 SmtUtils]: Spent 5.98 s on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-12-09 04:39:04,761 WARN L197 SmtUtils]: Spent 5.30 s on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-12-09 04:39:17,346 WARN L197 SmtUtils]: Spent 6.20 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-12-09 04:39:24,688 WARN L197 SmtUtils]: Spent 4.69 s on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-12-09 04:39:32,964 WARN L197 SmtUtils]: Spent 5.63 s on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-09 04:39:40,675 WARN L197 SmtUtils]: Spent 6.03 s on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-12-09 04:39:49,159 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-09 04:39:55,898 WARN L197 SmtUtils]: Spent 3.98 s on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-09 04:40:05,406 WARN L197 SmtUtils]: Spent 2.94 s on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-12-09 04:40:11,482 WARN L197 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-12-09 04:40:18,679 WARN L197 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-12-09 04:40:25,194 WARN L197 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-12-09 04:40:39,980 WARN L197 SmtUtils]: Spent 4.53 s on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-12-09 04:40:49,878 WARN L197 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-12-09 04:40:57,387 WARN L197 SmtUtils]: Spent 5.01 s on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-12-09 04:41:19,270 WARN L197 SmtUtils]: Spent 9.89 s on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-09 04:41:27,614 WARN L197 SmtUtils]: Spent 4.72 s on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-12-09 04:41:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:41:27,986 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-12-09 04:41:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-09 04:41:28,035 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 29 [2020-12-09 04:41:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:41:28,036 INFO L225 Difference]: With dead ends: 76 [2020-12-09 04:41:28,036 INFO L226 Difference]: Without dead ends: 66 [2020-12-09 04:41:28,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 135 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 288.9s TimeCoverageRelationStatistics Valid=941, Invalid=2841, Unknown=0, NotChecked=0, Total=3782 [2020-12-09 04:41:28,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-09 04:41:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-12-09 04:41:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 04:41:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-09 04:41:28,051 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 29 [2020-12-09 04:41:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:41:28,051 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-09 04:41:28,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-09 04:41:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-09 04:41:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-09 04:41:28,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:41:28,052 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:41:28,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt [2020-12-09 04:41:28,656 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:41:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:41:28,657 INFO L82 PathProgramCache]: Analyzing trace with hash -732108121, now seen corresponding path program 3 times [2020-12-09 04:41:28,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:41:28,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97738721] [2020-12-09 04:41:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-12-09 04:41:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:41:30,238 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:41:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:41:31,940 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:41:32,106 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 04:41:32,106 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 04:41:32,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3 [2020-12-09 04:41:32,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:41:32 BoogieIcfgContainer [2020-12-09 04:41:32,372 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:41:32,372 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:41:32,372 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:41:32,373 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:41:32,373 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:32:47" (3/4) ... [2020-12-09 04:41:32,374 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 04:41:32,407 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c6fe74a3-634f-4f8b-b3f7-047d5deb74a3/bin/utaipan/witness.graphml [2020-12-09 04:41:32,407 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:41:32,408 INFO L168 Benchmark]: Toolchain (without parser) took 526577.15 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 40.6 MB in the beginning and 23.5 MB in the end (delta: 17.1 MB). Peak memory consumption was 34.5 MB. Max. memory is 16.1 GB. [2020-12-09 04:41:32,409 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 60.8 MB. Free memory was 43.9 MB in the beginning and 43.8 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:41:32,409 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.37 ms. Allocated memory is still 60.8 MB. Free memory was 40.4 MB in the beginning and 30.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 04:41:32,410 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.43 ms. Allocated memory is still 60.8 MB. Free memory was 29.8 MB in the beginning and 45.2 MB in the end (delta: -15.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 04:41:32,410 INFO L168 Benchmark]: Boogie Preprocessor took 19.86 ms. Allocated memory is still 60.8 MB. Free memory was 45.2 MB in the beginning and 44.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:41:32,410 INFO L168 Benchmark]: RCFGBuilder took 959.14 ms. Allocated memory is still 60.8 MB. Free memory was 43.7 MB in the beginning and 29.9 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 04:41:32,411 INFO L168 Benchmark]: TraceAbstraction took 525356.82 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 29.5 MB in the beginning and 27.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 25.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:41:32,411 INFO L168 Benchmark]: Witness Printer took 35.18 ms. Allocated memory is still 79.7 MB. Free memory was 26.4 MB in the beginning and 23.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:41:32,414 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 60.8 MB. Free memory was 43.9 MB in the beginning and 43.8 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 158.37 ms. Allocated memory is still 60.8 MB. Free memory was 40.4 MB in the beginning and 30.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.43 ms. Allocated memory is still 60.8 MB. Free memory was 29.8 MB in the beginning and 45.2 MB in the end (delta: -15.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.86 ms. Allocated memory is still 60.8 MB. Free memory was 45.2 MB in the beginning and 44.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 959.14 ms. Allocated memory is still 60.8 MB. Free memory was 43.7 MB in the beginning and 29.9 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 525356.82 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 29.5 MB in the beginning and 27.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 25.1 MB. Max. memory is 16.1 GB. * Witness Printer took 35.18 ms. Allocated memory is still 79.7 MB. Free memory was 26.4 MB in the beginning and 23.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L7] COND FALSE !(!cond) VAL [counter=0] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [counter=0] [L28] EXPR counter++ VAL [counter=1] [L28] COND TRUE counter++<5 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=1] [L28] EXPR counter++ VAL [counter=2] [L28] COND TRUE counter++<5 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=2] [L28] EXPR counter++ VAL [counter=3] [L28] COND TRUE counter++<5 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=3] [L28] EXPR counter++ VAL [counter=4] [L28] COND TRUE counter++<5 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=4] [L28] EXPR counter++ VAL [counter=5] [L28] COND TRUE counter++<5 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=5] [L28] EXPR counter++ VAL [counter=6] [L28] COND FALSE !(counter++<5) [L10] COND FALSE !(!(cond)) VAL [counter=6] [L10] COND TRUE !(cond) VAL [counter=6] [L12] reach_error() VAL [counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 525.2s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 331.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 106 SDtfs, 610 SDslu, 497 SDs, 0 SdLazy, 572 SolverSat, 327 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 86.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 665 GetRequests, 486 SyntacticMatches, 23 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 408.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 79 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 15.8s SatisfiabilityAnalysisTime, 172.1s InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 584 ConstructedInterpolants, 4 QuantifiedInterpolants, 330687 SizeOfPredicates, 73 NumberOfNonLiveVariables, 1000 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 6/486 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...