./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann04.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_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann04.c -s /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/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 5e57a3ac5bdb229178b6e3922e8ce89677cf2614 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 09:08:07,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:08:07,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:08:07,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:08:07,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:08:07,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:08:07,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:08:07,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:08:07,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:08:07,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:08:07,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:08:07,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:08:07,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:08:07,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:08:07,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:08:07,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:08:07,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:08:07,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:08:07,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:08:07,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:08:07,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:08:07,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:08:07,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:08:07,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:08:07,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:08:07,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:08:07,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:08:07,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:08:07,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:08:07,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:08:07,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:08:07,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:08:07,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:08:07,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:08:07,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:08:07,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:08:07,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:08:07,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:08:07,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:08:07,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:08:07,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:08:07,636 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 09:08:07,658 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:08:07,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:08:07,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:08:07,659 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:08:07,660 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:08:07,660 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:08:07,660 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 09:08:07,660 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:08:07,660 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:08:07,661 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 09:08:07,661 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 09:08:07,661 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:08:07,661 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 09:08:07,661 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 09:08:07,661 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 09:08:07,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:08:07,662 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:08:07,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 09:08:07,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:08:07,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:08:07,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 09:08:07,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:08:07,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 09:08:07,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:08:07,664 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:08:07,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 09:08:07,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:08:07,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 09:08:07,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:08:07,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:08:07,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:08:07,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:08:07,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:08:07,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 09:08:07,665 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 09:08:07,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 09:08:07,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 09:08:07,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:08:07,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:08:07,666 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_79259e0f-49fc-4f1a-997a-20d6c15b344a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5e57a3ac5bdb229178b6e3922e8ce89677cf2614 [2020-12-09 09:08:07,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:08:07,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:08:07,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:08:07,880 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:08:07,880 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:08:07,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan/../../sv-benchmarks/c/recursive/Ackermann04.c [2020-12-09 09:08:07,922 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan/data/5bf762f1b/7be0bc12b40546a7932ca5987c0c1ca5/FLAG8b55fbdb8 [2020-12-09 09:08:08,275 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:08:08,275 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/sv-benchmarks/c/recursive/Ackermann04.c [2020-12-09 09:08:08,280 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan/data/5bf762f1b/7be0bc12b40546a7932ca5987c0c1ca5/FLAG8b55fbdb8 [2020-12-09 09:08:08,291 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan/data/5bf762f1b/7be0bc12b40546a7932ca5987c0c1ca5 [2020-12-09 09:08:08,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:08:08,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:08:08,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:08:08,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:08:08,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:08:08,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:08:08" (1/1) ... [2020-12-09 09:08:08,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@401e0de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:08:08, skipping insertion in model container [2020-12-09 09:08:08,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:08:08" (1/1) ... [2020-12-09 09:08:08,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:08:08,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:08:08,428 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_79259e0f-49fc-4f1a-997a-20d6c15b344a/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2020-12-09 09:08:08,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:08:08,438 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:08:08,449 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_79259e0f-49fc-4f1a-997a-20d6c15b344a/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2020-12-09 09:08:08,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:08:08,467 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:08:08,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:08:08 WrapperNode [2020-12-09 09:08:08,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:08:08,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:08:08,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:08:08,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:08:08,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:08:08" (1/1) ... [2020-12-09 09:08:08,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:08:08" (1/1) ... [2020-12-09 09:08:08,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:08:08,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:08:08,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:08:08,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:08:08,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:08:08" (1/1) ... [2020-12-09 09:08:08,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:08:08" (1/1) ... [2020-12-09 09:08:08,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:08:08" (1/1) ... [2020-12-09 09:08:08,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:08:08" (1/1) ... [2020-12-09 09:08:08,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:08:08" (1/1) ... [2020-12-09 09:08:08,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:08:08" (1/1) ... [2020-12-09 09:08:08,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:08:08" (1/1) ... [2020-12-09 09:08:08,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:08:08,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:08:08,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:08:08,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:08:08,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:08:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/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 09:08:08,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:08:08,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:08:08,567 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-12-09 09:08:08,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-12-09 09:08:08,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 09:08:08,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:08:08,732 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:08:08,732 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 09:08:08,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:08:08 BoogieIcfgContainer [2020-12-09 09:08:08,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:08:08,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:08:08,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:08:08,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:08:08,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:08:08" (1/3) ... [2020-12-09 09:08:08,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471bbdc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:08:08, skipping insertion in model container [2020-12-09 09:08:08,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:08:08" (2/3) ... [2020-12-09 09:08:08,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471bbdc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:08:08, skipping insertion in model container [2020-12-09 09:08:08,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:08:08" (3/3) ... [2020-12-09 09:08:08,743 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-12-09 09:08:08,756 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:08:08,759 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 09:08:08,768 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 09:08:08,784 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:08:08,784 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 09:08:08,784 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:08:08,784 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:08:08,784 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:08:08,784 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:08:08,784 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:08:08,785 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:08:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-09 09:08:08,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 09:08:08,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:08:08,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:08:08,799 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:08:08,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:08:08,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1538870455, now seen corresponding path program 1 times [2020-12-09 09:08:08,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:08:08,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690609069] [2020-12-09 09:08:08,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:08:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:08:08,946 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 09:08:08,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690609069] [2020-12-09 09:08:08,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:08:08,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 09:08:08,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21494150] [2020-12-09 09:08:08,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:08:08,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:08:08,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:08:08,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:08:08,963 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-12-09 09:08:09,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:08:09,047 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2020-12-09 09:08:09,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 09:08:09,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 09:08:09,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:08:09,056 INFO L225 Difference]: With dead ends: 34 [2020-12-09 09:08:09,057 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 09:08:09,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 09:08:09,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 09:08:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-09 09:08:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 09:08:09,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2020-12-09 09:08:09,088 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2020-12-09 09:08:09,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:08:09,088 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2020-12-09 09:08:09,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:08:09,088 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2020-12-09 09:08:09,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 09:08:09,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:08:09,090 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:08:09,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 09:08:09,090 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:08:09,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:08:09,091 INFO L82 PathProgramCache]: Analyzing trace with hash -108557995, now seen corresponding path program 1 times [2020-12-09 09:08:09,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:08:09,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161205453] [2020-12-09 09:08:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:08:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:08:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 09:08:09,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161205453] [2020-12-09 09:08:09,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976576372] [2020-12-09 09:08:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/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 09:08:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:08:09,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 09:08:09,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:08:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 09:08:09,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:08:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 09:08:09,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [734882009] [2020-12-09 09:08:09,392 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 09:08:09,392 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:08:09,396 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 09:08:09,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:08:09,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2020-12-09 09:08:09,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486225788] [2020-12-09 09:08:09,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 09:08:09,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:08:09,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 09:08:09,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-09 09:08:09,401 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 11 states. [2020-12-09 09:08:09,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:08:09,517 INFO L93 Difference]: Finished difference Result 73 states and 132 transitions. [2020-12-09 09:08:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 09:08:09,518 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-12-09 09:08:09,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:08:09,521 INFO L225 Difference]: With dead ends: 73 [2020-12-09 09:08:09,521 INFO L226 Difference]: Without dead ends: 49 [2020-12-09 09:08:09,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-12-09 09:08:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-09 09:08:09,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-09 09:08:09,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 09:08:09,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 78 transitions. [2020-12-09 09:08:09,537 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 78 transitions. Word has length 18 [2020-12-09 09:08:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:08:09,537 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 78 transitions. [2020-12-09 09:08:09,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 09:08:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 78 transitions. [2020-12-09 09:08:09,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-09 09:08:09,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:08:09,540 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:08:09,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 09:08:09,742 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:08:09,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:08:09,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1262121361, now seen corresponding path program 1 times [2020-12-09 09:08:09,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:08:09,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511101368] [2020-12-09 09:08:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:08:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:08:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-09 09:08:09,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511101368] [2020-12-09 09:08:09,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244834938] [2020-12-09 09:08:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/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 09:08:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:08:09,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 09:08:09,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:08:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-09 09:08:10,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:08:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-09 09:08:10,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [75291680] [2020-12-09 09:08:10,420 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2020-12-09 09:08:10,420 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:08:10,421 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 09:08:10,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:08:10,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2020-12-09 09:08:10,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114295391] [2020-12-09 09:08:10,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 09:08:10,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:08:10,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 09:08:10,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-09 09:08:10,424 INFO L87 Difference]: Start difference. First operand 49 states and 78 transitions. Second operand 8 states. [2020-12-09 09:08:10,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:08:10,509 INFO L93 Difference]: Finished difference Result 66 states and 126 transitions. [2020-12-09 09:08:10,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 09:08:10,509 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-09 09:08:10,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:08:10,513 INFO L225 Difference]: With dead ends: 66 [2020-12-09 09:08:10,513 INFO L226 Difference]: Without dead ends: 62 [2020-12-09 09:08:10,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-09 09:08:10,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-09 09:08:10,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-09 09:08:10,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-09 09:08:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2020-12-09 09:08:10,533 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 44 [2020-12-09 09:08:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:08:10,534 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2020-12-09 09:08:10,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 09:08:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2020-12-09 09:08:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-09 09:08:10,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:08:10,540 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:08:10,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:08:10,742 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:08:10,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:08:10,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1396423690, now seen corresponding path program 2 times [2020-12-09 09:08:10,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:08:10,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313602019] [2020-12-09 09:08:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:08:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:08:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 104 proven. 14 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-09 09:08:10,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313602019] [2020-12-09 09:08:10,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744418238] [2020-12-09 09:08:10,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/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 09:08:10,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-09 09:08:10,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 09:08:10,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 09:08:10,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:08:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 98 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-12-09 09:08:11,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:08:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 105 proven. 13 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-09 09:08:11,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [402778886] [2020-12-09 09:08:11,438 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2020-12-09 09:08:11,438 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:08:11,438 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 09:08:11,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:08:11,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2020-12-09 09:08:11,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709401901] [2020-12-09 09:08:11,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-09 09:08:11,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:08:11,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-09 09:08:11,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-12-09 09:08:11,440 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand 18 states. [2020-12-09 09:08:12,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:08:12,014 INFO L93 Difference]: Finished difference Result 225 states and 869 transitions. [2020-12-09 09:08:12,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-09 09:08:12,015 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2020-12-09 09:08:12,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:08:12,024 INFO L225 Difference]: With dead ends: 225 [2020-12-09 09:08:12,024 INFO L226 Difference]: Without dead ends: 167 [2020-12-09 09:08:12,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=271, Invalid=919, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 09:08:12,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-09 09:08:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 105. [2020-12-09 09:08:12,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-09 09:08:12,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 304 transitions. [2020-12-09 09:08:12,070 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 304 transitions. Word has length 78 [2020-12-09 09:08:12,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:08:12,071 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 304 transitions. [2020-12-09 09:08:12,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-09 09:08:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 304 transitions. [2020-12-09 09:08:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-09 09:08:12,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:08:12,078 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:08:12,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:08:12,279 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:08:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:08:12,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1560304543, now seen corresponding path program 3 times [2020-12-09 09:08:12,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:08:12,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17311418] [2020-12-09 09:08:12,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:08:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:08:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 130 proven. 208 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2020-12-09 09:08:12,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17311418] [2020-12-09 09:08:12,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418477162] [2020-12-09 09:08:12,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:08:12,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 09:08:12,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 09:08:12,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 09:08:12,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:08:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 362 proven. 123 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-09 09:08:12,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:08:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 141 proven. 261 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-12-09 09:08:13,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1293132667] [2020-12-09 09:08:13,722 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2020-12-09 09:08:13,722 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:08:13,722 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 09:08:13,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:08:13,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 15] total 30 [2020-12-09 09:08:13,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178121616] [2020-12-09 09:08:13,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-09 09:08:13,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:08:13,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-09 09:08:13,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2020-12-09 09:08:13,725 INFO L87 Difference]: Start difference. First operand 105 states and 304 transitions. Second operand 30 states. [2020-12-09 09:08:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:08:16,184 INFO L93 Difference]: Finished difference Result 234 states and 848 transitions. [2020-12-09 09:08:16,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-09 09:08:16,185 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 117 [2020-12-09 09:08:16,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:08:16,187 INFO L225 Difference]: With dead ends: 234 [2020-12-09 09:08:16,187 INFO L226 Difference]: Without dead ends: 101 [2020-12-09 09:08:16,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1739, Invalid=7381, Unknown=0, NotChecked=0, Total=9120 [2020-12-09 09:08:16,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-09 09:08:16,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2020-12-09 09:08:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-09 09:08:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 126 transitions. [2020-12-09 09:08:16,202 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 126 transitions. Word has length 117 [2020-12-09 09:08:16,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:08:16,203 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 126 transitions. [2020-12-09 09:08:16,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-09 09:08:16,203 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 126 transitions. [2020-12-09 09:08:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-09 09:08:16,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:08:16,204 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:08:16,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:08:16,405 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:08:16,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:08:16,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1090473022, now seen corresponding path program 4 times [2020-12-09 09:08:16,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:08:16,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486673587] [2020-12-09 09:08:16,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:08:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:08:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 149 proven. 293 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2020-12-09 09:08:16,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486673587] [2020-12-09 09:08:16,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404767902] [2020-12-09 09:08:16,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/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 09:08:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:08:16,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 09:08:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:08:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-12-09 09:08:16,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:08:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 155 proven. 295 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-12-09 09:08:18,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1288996007] [2020-12-09 09:08:18,173 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2020-12-09 09:08:18,173 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:08:18,174 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 09:08:18,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:08:18,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 17] total 21 [2020-12-09 09:08:18,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883089901] [2020-12-09 09:08:18,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-09 09:08:18,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:08:18,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-09 09:08:18,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-12-09 09:08:18,175 INFO L87 Difference]: Start difference. First operand 84 states and 126 transitions. Second operand 21 states. [2020-12-09 09:08:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:08:18,673 INFO L93 Difference]: Finished difference Result 193 states and 340 transitions. [2020-12-09 09:08:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-09 09:08:18,673 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 130 [2020-12-09 09:08:18,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:08:18,675 INFO L225 Difference]: With dead ends: 193 [2020-12-09 09:08:18,675 INFO L226 Difference]: Without dead ends: 108 [2020-12-09 09:08:18,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 255 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=462, Invalid=1608, Unknown=0, NotChecked=0, Total=2070 [2020-12-09 09:08:18,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-09 09:08:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2020-12-09 09:08:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-09 09:08:18,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 151 transitions. [2020-12-09 09:08:18,690 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 151 transitions. Word has length 130 [2020-12-09 09:08:18,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:08:18,690 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 151 transitions. [2020-12-09 09:08:18,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-09 09:08:18,691 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 151 transitions. [2020-12-09 09:08:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-09 09:08:18,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:08:18,692 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:08:18,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 09:08:18,893 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:08:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:08:18,894 INFO L82 PathProgramCache]: Analyzing trace with hash -511219076, now seen corresponding path program 5 times [2020-12-09 09:08:18,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:08:18,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254714500] [2020-12-09 09:08:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:08:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:08:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 439 proven. 281 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-12-09 09:08:19,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254714500] [2020-12-09 09:08:19,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780528380] [2020-12-09 09:08:19,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:08:19,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-09 09:08:19,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 09:08:19,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-09 09:08:19,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:08:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-12-09 09:08:19,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:08:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-12-09 09:08:22,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1898576044] [2020-12-09 09:08:22,290 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2020-12-09 09:08:22,291 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:08:22,291 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 09:08:22,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:08:22,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 27] total 35 [2020-12-09 09:08:22,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505779004] [2020-12-09 09:08:22,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-09 09:08:22,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:08:22,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-09 09:08:22,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 09:08:22,293 INFO L87 Difference]: Start difference. First operand 99 states and 151 transitions. Second operand 35 states. [2020-12-09 09:08:23,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:08:23,205 INFO L93 Difference]: Finished difference Result 223 states and 398 transitions. [2020-12-09 09:08:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-09 09:08:23,206 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 156 [2020-12-09 09:08:23,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:08:23,208 INFO L225 Difference]: With dead ends: 223 [2020-12-09 09:08:23,208 INFO L226 Difference]: Without dead ends: 132 [2020-12-09 09:08:23,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 304 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=860, Invalid=3696, Unknown=0, NotChecked=0, Total=4556 [2020-12-09 09:08:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-09 09:08:23,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-12-09 09:08:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-09 09:08:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 184 transitions. [2020-12-09 09:08:23,220 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 184 transitions. Word has length 156 [2020-12-09 09:08:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:08:23,220 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 184 transitions. [2020-12-09 09:08:23,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-09 09:08:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 184 transitions. [2020-12-09 09:08:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-09 09:08:23,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:08:23,222 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:08:23,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:08:23,424 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:08:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:08:23,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1922447937, now seen corresponding path program 6 times [2020-12-09 09:08:23,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:08:23,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785773667] [2020-12-09 09:08:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:08:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:08:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 495 proven. 368 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-12-09 09:08:23,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785773667] [2020-12-09 09:08:23,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226925594] [2020-12-09 09:08:23,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:08:23,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 09:08:23,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 09:08:23,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-09 09:08:23,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:08:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-12-09 09:08:23,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:08:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2020-12-09 09:08:26,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [493059572] [2020-12-09 09:08:26,982 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2020-12-09 09:08:26,982 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:08:26,982 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 09:08:26,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:08:26,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 28] total 32 [2020-12-09 09:08:26,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839578304] [2020-12-09 09:08:26,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-09 09:08:26,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:08:26,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-09 09:08:26,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2020-12-09 09:08:26,984 INFO L87 Difference]: Start difference. First operand 114 states and 184 transitions. Second operand 32 states. [2020-12-09 09:08:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:08:27,946 INFO L93 Difference]: Finished difference Result 262 states and 496 transitions. [2020-12-09 09:08:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-09 09:08:27,947 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 169 [2020-12-09 09:08:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:08:27,949 INFO L225 Difference]: With dead ends: 262 [2020-12-09 09:08:27,949 INFO L226 Difference]: Without dead ends: 156 [2020-12-09 09:08:27,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 334 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2020-12-09 09:08:27,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-09 09:08:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 129. [2020-12-09 09:08:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-09 09:08:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 217 transitions. [2020-12-09 09:08:27,962 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 217 transitions. Word has length 169 [2020-12-09 09:08:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:08:27,963 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 217 transitions. [2020-12-09 09:08:27,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-09 09:08:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 217 transitions. [2020-12-09 09:08:27,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-09 09:08:27,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:08:27,965 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:08:28,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:08:28,165 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:08:28,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:08:28,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2140695240, now seen corresponding path program 7 times [2020-12-09 09:08:28,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:08:28,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24572462] [2020-12-09 09:08:28,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:08:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:08:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 681 proven. 75 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-12-09 09:08:28,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24572462] [2020-12-09 09:08:28,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631161006] [2020-12-09 09:08:28,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/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 09:08:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:08:28,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-09 09:08:28,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:08:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-12-09 09:08:28,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:08:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 711 proven. 75 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2020-12-09 09:08:33,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [345942456] [2020-12-09 09:08:33,183 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2020-12-09 09:08:33,183 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:08:33,183 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 09:08:33,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:08:33,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 33] total 37 [2020-12-09 09:08:33,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314774415] [2020-12-09 09:08:33,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-09 09:08:33,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:08:33,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-09 09:08:33,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2020-12-09 09:08:33,185 INFO L87 Difference]: Start difference. First operand 129 states and 217 transitions. Second operand 37 states. [2020-12-09 09:08:34,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:08:34,560 INFO L93 Difference]: Finished difference Result 176 states and 297 transitions. [2020-12-09 09:08:34,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-09 09:08:34,561 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 182 [2020-12-09 09:08:34,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:08:34,561 INFO L225 Difference]: With dead ends: 176 [2020-12-09 09:08:34,562 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 09:08:34,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=991, Invalid=4559, Unknown=0, NotChecked=0, Total=5550 [2020-12-09 09:08:34,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 09:08:34,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 09:08:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 09:08:34,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 09:08:34,565 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 182 [2020-12-09 09:08:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:08:34,565 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 09:08:34,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-09 09:08:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 09:08:34,565 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 09:08:34,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-09 09:08:34,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 09:08:36,298 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 19 [2020-12-09 09:08:37,097 WARN L197 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 41 [2020-12-09 09:08:37,223 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 11 [2020-12-09 09:08:37,276 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 09:08:37,276 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 09:08:37,276 INFO L262 CegarLoopResult]: For program point L29(lines 29 33) no Hoare annotation was computed. [2020-12-09 09:08:37,276 INFO L265 CegarLoopResult]: At program point L27(lines 27 47) the Hoare annotation is: true [2020-12-09 09:08:37,276 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2020-12-09 09:08:37,276 INFO L262 CegarLoopResult]: For program point L45(line 45) no Hoare annotation was computed. [2020-12-09 09:08:37,276 INFO L262 CegarLoopResult]: For program point L42(lines 42 46) no Hoare annotation was computed. [2020-12-09 09:08:37,276 INFO L265 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: true [2020-12-09 09:08:37,276 INFO L262 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-12-09 09:08:37,276 INFO L262 CegarLoopResult]: For program point L35(lines 35 40) no Hoare annotation was computed. [2020-12-09 09:08:37,276 INFO L262 CegarLoopResult]: For program point ackermannEXIT(lines 16 24) no Hoare annotation was computed. [2020-12-09 09:08:37,277 INFO L258 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (or (not (<= |ackermann_#in~n| 0)) (<= 1 |ackermann_#in~m|)) (or (not (<= |ackermann_#in~m| 0)) (not (<= 0 |ackermann_#in~m|))) (= ackermann_~n |ackermann_#in~n|) (<= |ackermann_#in~m| ackermann_~m) (<= ackermann_~m |ackermann_#in~m|)) [2020-12-09 09:08:37,277 INFO L262 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-12-09 09:08:37,277 INFO L265 CegarLoopResult]: At program point ackermannENTRY(lines 16 24) the Hoare annotation is: true [2020-12-09 09:08:37,277 INFO L258 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~n |ackermann_#in~n|) (<= |ackermann_#in~m| ackermann_~m) (<= ackermann_~m |ackermann_#in~m|)) [2020-12-09 09:08:37,277 INFO L258 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse6 (<= 3 |ackermann_#t~ret8|)) (.cse5 (<= 5 |ackermann_#t~ret8|)) (.cse0 (<= 6 |ackermann_#t~ret8|)) (.cse7 (<= |ackermann_#in~m| 1))) (and (let ((.cse4 (<= 2 |ackermann_#in~m|)) (.cse1 (= ackermann_~n |ackermann_#in~n|)) (.cse2 (<= |ackermann_#in~m| ackermann_~m)) (.cse3 (<= ackermann_~m |ackermann_#in~m|))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and (<= |ackermann_#in~m| 2) .cse5 .cse1 .cse2 .cse3 .cse4) (and .cse6 .cse1 .cse2 .cse3 .cse4 (< |ackermann_#in~n| 2)) (and .cse7 (<= 2 |ackermann_#t~ret8|) .cse1 (<= 1 |ackermann_#in~m|) .cse2 .cse3))) (not (<= |ackermann_#in~n| 0)) (or (= |ackermann_#in~n| 1) (and (<= |ackermann_#in~n| 2) .cse6) (and .cse7 .cse5 (<= |ackermann_#in~n| 4)) .cse0 (and .cse7 (<= |ackermann_#in~n| 3) (<= 4 |ackermann_#t~ret8|))))) [2020-12-09 09:08:37,277 INFO L262 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-12-09 09:08:37,277 INFO L262 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-12-09 09:08:37,277 INFO L262 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-12-09 09:08:37,277 INFO L262 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-12-09 09:08:37,277 INFO L262 CegarLoopResult]: For program point ackermannFINAL(lines 16 24) no Hoare annotation was computed. [2020-12-09 09:08:37,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:08:37 BoogieIcfgContainer [2020-12-09 09:08:37,283 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:08:37,283 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:08:37,283 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:08:37,283 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:08:37,284 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:08:08" (3/4) ... [2020-12-09 09:08:37,285 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 09:08:37,289 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2020-12-09 09:08:37,292 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-09 09:08:37,292 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-09 09:08:37,292 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 09:08:37,292 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 09:08:37,316 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_79259e0f-49fc-4f1a-997a-20d6c15b344a/bin/utaipan/witness.graphml [2020-12-09 09:08:37,316 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:08:37,317 INFO L168 Benchmark]: Toolchain (without parser) took 29022.54 ms. Allocated memory was 104.9 MB in the beginning and 264.2 MB in the end (delta: 159.4 MB). Free memory was 64.7 MB in the beginning and 199.9 MB in the end (delta: -135.1 MB). Peak memory consumption was 26.9 MB. Max. memory is 16.1 GB. [2020-12-09 09:08:37,317 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 104.9 MB. Free memory is still 81.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:08:37,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.83 ms. Allocated memory is still 104.9 MB. Free memory was 64.6 MB in the beginning and 83.2 MB in the end (delta: -18.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2020-12-09 09:08:37,318 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.38 ms. Allocated memory is still 104.9 MB. Free memory was 83.2 MB in the beginning and 81.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:08:37,318 INFO L168 Benchmark]: Boogie Preprocessor took 13.42 ms. Allocated memory is still 104.9 MB. Free memory was 81.7 MB in the beginning and 80.9 MB in the end (delta: 765.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:08:37,319 INFO L168 Benchmark]: RCFGBuilder took 229.38 ms. Allocated memory is still 104.9 MB. Free memory was 80.9 MB in the beginning and 79.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 09:08:37,319 INFO L168 Benchmark]: TraceAbstraction took 28546.40 ms. Allocated memory was 104.9 MB in the beginning and 264.2 MB in the end (delta: 159.4 MB). Free memory was 79.2 MB in the beginning and 202.0 MB in the end (delta: -122.8 MB). Peak memory consumption was 176.0 MB. Max. memory is 16.1 GB. [2020-12-09 09:08:37,319 INFO L168 Benchmark]: Witness Printer took 33.12 ms. Allocated memory is still 264.2 MB. Free memory was 202.0 MB in the beginning and 199.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:08:37,321 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 104.9 MB. Free memory is still 81.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 172.83 ms. Allocated memory is still 104.9 MB. Free memory was 64.6 MB in the beginning and 83.2 MB in the end (delta: -18.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.38 ms. Allocated memory is still 104.9 MB. Free memory was 83.2 MB in the beginning and 81.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 13.42 ms. Allocated memory is still 104.9 MB. Free memory was 81.7 MB in the beginning and 80.9 MB in the end (delta: 765.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 229.38 ms. Allocated memory is still 104.9 MB. Free memory was 80.9 MB in the beginning and 79.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 28546.40 ms. Allocated memory was 104.9 MB in the beginning and 264.2 MB in the end (delta: 159.4 MB). Free memory was 79.2 MB in the beginning and 202.0 MB in the end (delta: -122.8 MB). Peak memory consumption was 176.0 MB. Max. memory is 16.1 GB. * Witness Printer took 33.12 ms. Allocated memory is still 264.2 MB. Free memory was 202.0 MB in the beginning and 199.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 45]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.9s, OverallIterations: 9, TraceHistogramMax: 27, AutomataDifference: 7.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 231 SDtfs, 683 SDslu, 1084 SDs, 0 SdLazy, 4527 SolverSat, 2256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2172 GetRequests, 1752 SyntacticMatches, 18 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6664 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=129occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 133 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 534 PreInvPairs, 1192 NumberOfFragments, 156 HoareAnnotationTreeSize, 534 FomulaSimplifications, 313969 FormulaSimplificationTreeSizeReduction, 1.3s HoareSimplificationTime, 6 FomulaSimplificationsInter, 6075 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 15.5s InterpolantComputationTime, 1799 NumberOfCodeBlocks, 1763 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 2668 ConstructedInterpolants, 0 QuantifiedInterpolants, 730758 SizeOfPredicates, 62 NumberOfNonLiveVariables, 2732 ConjunctsInSsa, 174 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 15277/18906 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 correct! Received shutdown request...