./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d3562c726fb0df5872bc6ae08c11ec0d40862c19 ......................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d3562c726fb0df5872bc6ae08c11ec0d40862c19 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:57:10,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:57:10,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:57:10,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:57:10,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:57:10,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:57:10,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:57:10,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:57:10,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:57:10,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:57:10,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:57:10,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:57:10,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:57:10,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:57:10,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:57:10,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:57:10,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:57:10,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:57:10,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:57:10,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:57:10,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:57:10,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:57:10,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:57:10,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:57:10,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:57:10,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:57:10,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:57:10,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:57:10,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:57:10,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:57:10,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:57:10,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:57:10,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:57:10,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:57:10,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:57:10,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:57:10,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:57:10,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:57:10,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:57:10,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:57:10,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:57:10,520 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:57:10,536 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:57:10,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:57:10,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:57:10,538 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:57:10,538 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:57:10,538 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:57:10,538 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:57:10,538 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:57:10,538 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:57:10,539 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:57:10,539 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:57:10,539 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:57:10,539 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:57:10,539 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:57:10,540 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:57:10,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:57:10,540 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:57:10,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:57:10,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:57:10,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:57:10,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:57:10,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:57:10,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:57:10,542 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:57:10,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:57:10,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:57:10,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:57:10,542 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:57:10,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:57:10,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:57:10,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:57:10,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:57:10,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:57:10,543 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:57:10,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:57:10,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:57:10,544 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:57:10,544 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_4b599d91-8477-4bb8-8c53-26f79ca01790/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(__VERIFIER_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 -> d3562c726fb0df5872bc6ae08c11ec0d40862c19 [2019-11-26 02:57:10,691 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:57:10,704 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:57:10,707 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:57:10,708 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:57:10,708 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:57:10,709 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/../../sv-benchmarks/c/recursive/Fibonacci04.c [2019-11-26 02:57:10,756 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/data/d6911aec3/4ead6784d1784ed2907307ebc196d543/FLAG8fea07621 [2019-11-26 02:57:11,138 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:57:11,139 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/sv-benchmarks/c/recursive/Fibonacci04.c [2019-11-26 02:57:11,145 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/data/d6911aec3/4ead6784d1784ed2907307ebc196d543/FLAG8fea07621 [2019-11-26 02:57:11,554 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/data/d6911aec3/4ead6784d1784ed2907307ebc196d543 [2019-11-26 02:57:11,559 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:57:11,561 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:57:11,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:57:11,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:57:11,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:57:11,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:57:11" (1/1) ... [2019-11-26 02:57:11,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d5d7b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:11, skipping insertion in model container [2019-11-26 02:57:11,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:57:11" (1/1) ... [2019-11-26 02:57:11,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:57:11,597 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:57:11,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:57:11,737 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:57:11,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:57:11,878 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:57:11,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:11 WrapperNode [2019-11-26 02:57:11,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:57:11,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:57:11,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:57:11,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:57:11,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:11" (1/1) ... [2019-11-26 02:57:11,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:11" (1/1) ... [2019-11-26 02:57:11,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:57:11,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:57:11,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:57:11,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:57:11,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:11" (1/1) ... [2019-11-26 02:57:11,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:11" (1/1) ... [2019-11-26 02:57:11,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:11" (1/1) ... [2019-11-26 02:57:11,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:11" (1/1) ... [2019-11-26 02:57:11,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:11" (1/1) ... [2019-11-26 02:57:11,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:11" (1/1) ... [2019-11-26 02:57:11,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:11" (1/1) ... [2019-11-26 02:57:11,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:57:11,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:57:11,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:57:11,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:57:11,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/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 [2019-11-26 02:57:11,979 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2019-11-26 02:57:11,979 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2019-11-26 02:57:11,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:57:11,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:57:12,126 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:57:12,126 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:57:12,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:57:12 BoogieIcfgContainer [2019-11-26 02:57:12,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:57:12,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:57:12,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:57:12,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:57:12,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:57:11" (1/3) ... [2019-11-26 02:57:12,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a1a059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:57:12, skipping insertion in model container [2019-11-26 02:57:12,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:11" (2/3) ... [2019-11-26 02:57:12,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a1a059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:57:12, skipping insertion in model container [2019-11-26 02:57:12,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:57:12" (3/3) ... [2019-11-26 02:57:12,134 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2019-11-26 02:57:12,142 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:57:12,148 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:57:12,157 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:57:12,178 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:57:12,178 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:57:12,178 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:57:12,178 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:57:12,178 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:57:12,178 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:57:12,178 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:57:12,179 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:57:12,194 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-26 02:57:12,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:57:12,199 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:12,199 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:12,200 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:12,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:12,205 INFO L82 PathProgramCache]: Analyzing trace with hash 238562696, now seen corresponding path program 1 times [2019-11-26 02:57:12,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:57:12,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983279176] [2019-11-26 02:57:12,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:57:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:57:12,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983279176] [2019-11-26 02:57:12,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:57:12,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-26 02:57:12,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290110901] [2019-11-26 02:57:12,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:57:12,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:57:12,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:57:12,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:57:12,389 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2019-11-26 02:57:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:57:12,497 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-11-26 02:57:12,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:57:12,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-26 02:57:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:57:12,507 INFO L225 Difference]: With dead ends: 27 [2019-11-26 02:57:12,507 INFO L226 Difference]: Without dead ends: 17 [2019-11-26 02:57:12,509 INFO L630 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 [2019-11-26 02:57:12,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-26 02:57:12,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-26 02:57:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-26 02:57:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-26 02:57:12,541 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-11-26 02:57:12,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:57:12,541 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-26 02:57:12,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:57:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-26 02:57:12,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:57:12,543 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:12,543 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:12,543 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:12,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:12,543 INFO L82 PathProgramCache]: Analyzing trace with hash -497654578, now seen corresponding path program 1 times [2019-11-26 02:57:12,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:57:12,544 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312984726] [2019-11-26 02:57:12,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:57:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:57:12,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312984726] [2019-11-26 02:57:12,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:57:12,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-26 02:57:12,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218238198] [2019-11-26 02:57:12,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:57:12,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:57:12,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:57:12,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:57:12,588 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2019-11-26 02:57:12,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:57:12,654 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-11-26 02:57:12,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:57:12,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-26 02:57:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:57:12,656 INFO L225 Difference]: With dead ends: 23 [2019-11-26 02:57:12,656 INFO L226 Difference]: Without dead ends: 19 [2019-11-26 02:57:12,657 INFO L630 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 [2019-11-26 02:57:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-26 02:57:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-26 02:57:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-26 02:57:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-26 02:57:12,662 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-11-26 02:57:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:57:12,663 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-26 02:57:12,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:57:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-26 02:57:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-26 02:57:12,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:12,664 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:12,665 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:12,665 INFO L82 PathProgramCache]: Analyzing trace with hash -850570499, now seen corresponding path program 1 times [2019-11-26 02:57:12,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:57:12,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649205781] [2019-11-26 02:57:12,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:57:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:57:12,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649205781] [2019-11-26 02:57:12,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734216611] [2019-11-26 02:57:12,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/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 [2019-11-26 02:57:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:12,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:57:12,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:57:12,869 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:13,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:57:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:57:13,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825173388] [2019-11-26 02:57:13,115 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-26 02:57:13,116 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:57:13,121 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:57:13,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:57:13,326 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an 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:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) 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:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-26 02:57:13,329 INFO L168 Benchmark]: Toolchain (without parser) took 1769.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 950.1 MB in the beginning and 1.0 GB in the end (delta: -95.1 MB). Peak memory consumption was 53.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:13,330 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:57:13,330 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -194.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:13,331 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.77 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:57:13,331 INFO L168 Benchmark]: Boogie Preprocessor took 15.55 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:13,332 INFO L168 Benchmark]: RCFGBuilder took 203.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:13,332 INFO L168 Benchmark]: TraceAbstraction took 1199.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 79.7 MB). Peak memory consumption was 79.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:13,335 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 316.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -194.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.77 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.55 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 203.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1199.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 79.7 MB). Peak memory consumption was 79.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: Recursive programs are not supported.: de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:57:15,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:57:15,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:57:15,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:57:15,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:57:15,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:57:15,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:57:15,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:57:15,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:57:15,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:57:15,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:57:15,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:57:15,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:57:15,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:57:15,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:57:15,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:57:15,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:57:15,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:57:15,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:57:15,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:57:15,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:57:15,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:57:15,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:57:15,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:57:15,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:57:15,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:57:15,153 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:57:15,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:57:15,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:57:15,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:57:15,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:57:15,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:57:15,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:57:15,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:57:15,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:57:15,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:57:15,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:57:15,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:57:15,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:57:15,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:57:15,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:57:15,163 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-11-26 02:57:15,176 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:57:15,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:57:15,178 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:57:15,178 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:57:15,178 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:57:15,178 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:57:15,179 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:57:15,179 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:57:15,179 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:57:15,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:57:15,180 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:57:15,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:57:15,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:57:15,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:57:15,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:57:15,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:57:15,181 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:57:15,182 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:57:15,182 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:57:15,182 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:57:15,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:57:15,183 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:57:15,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:57:15,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:57:15,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:57:15,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:57:15,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:57:15,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:57:15,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:57:15,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:57:15,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:57:15,185 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:57:15,185 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:57:15,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:57:15,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:57:15,186 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_4b599d91-8477-4bb8-8c53-26f79ca01790/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(__VERIFIER_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 -> d3562c726fb0df5872bc6ae08c11ec0d40862c19 [2019-11-26 02:57:15,553 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:57:15,562 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:57:15,564 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:57:15,566 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:57:15,566 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:57:15,567 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/../../sv-benchmarks/c/recursive/Fibonacci04.c [2019-11-26 02:57:15,616 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/data/2be517999/fec31060ec124a378a8db39fd5dd32a3/FLAGccc1e33bc [2019-11-26 02:57:15,971 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:57:15,972 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/sv-benchmarks/c/recursive/Fibonacci04.c [2019-11-26 02:57:15,977 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/data/2be517999/fec31060ec124a378a8db39fd5dd32a3/FLAGccc1e33bc [2019-11-26 02:57:16,338 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/data/2be517999/fec31060ec124a378a8db39fd5dd32a3 [2019-11-26 02:57:16,340 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:57:16,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:57:16,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:57:16,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:57:16,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:57:16,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:57:16" (1/1) ... [2019-11-26 02:57:16,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7079eec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:16, skipping insertion in model container [2019-11-26 02:57:16,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:57:16" (1/1) ... [2019-11-26 02:57:16,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:57:16,370 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:57:16,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:57:16,563 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:57:16,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:57:16,591 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:57:16,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:16 WrapperNode [2019-11-26 02:57:16,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:57:16,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:57:16,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:57:16,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:57:16,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:16" (1/1) ... [2019-11-26 02:57:16,609 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:16" (1/1) ... [2019-11-26 02:57:16,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:57:16,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:57:16,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:57:16,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:57:16,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:16" (1/1) ... [2019-11-26 02:57:16,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:16" (1/1) ... [2019-11-26 02:57:16,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:16" (1/1) ... [2019-11-26 02:57:16,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:16" (1/1) ... [2019-11-26 02:57:16,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:16" (1/1) ... [2019-11-26 02:57:16,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:16" (1/1) ... [2019-11-26 02:57:16,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:16" (1/1) ... [2019-11-26 02:57:16,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:57:16,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:57:16,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:57:16,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:57:16,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/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 [2019-11-26 02:57:16,790 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2019-11-26 02:57:16,790 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2019-11-26 02:57:16,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:57:16,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:57:16,964 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:57:16,964 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:57:16,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:57:16 BoogieIcfgContainer [2019-11-26 02:57:16,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:57:16,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:57:16,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:57:16,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:57:16,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:57:16" (1/3) ... [2019-11-26 02:57:16,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2382573f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:57:16, skipping insertion in model container [2019-11-26 02:57:16,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:16" (2/3) ... [2019-11-26 02:57:16,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2382573f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:57:16, skipping insertion in model container [2019-11-26 02:57:16,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:57:16" (3/3) ... [2019-11-26 02:57:16,972 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2019-11-26 02:57:16,982 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:57:16,987 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:57:17,000 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:57:17,052 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:57:17,052 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:57:17,052 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:57:17,052 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:57:17,052 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:57:17,052 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:57:17,052 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:57:17,053 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:57:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-26 02:57:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:57:17,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:17,089 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:17,089 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:17,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:17,094 INFO L82 PathProgramCache]: Analyzing trace with hash 302252519, now seen corresponding path program 1 times [2019-11-26 02:57:17,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:57:17,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [228371268] [2019-11-26 02:57:17,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:57:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:17,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:57:17,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:57:17,239 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:57:17,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [228371268] [2019-11-26 02:57:17,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:57:17,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-26 02:57:17,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703013414] [2019-11-26 02:57:17,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:57:17,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:57:17,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:57:17,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:57:17,391 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 8 states. [2019-11-26 02:57:17,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:57:17,570 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2019-11-26 02:57:17,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:57:17,571 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-11-26 02:57:17,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:57:17,581 INFO L225 Difference]: With dead ends: 38 [2019-11-26 02:57:17,581 INFO L226 Difference]: Without dead ends: 20 [2019-11-26 02:57:17,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:57:17,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-26 02:57:17,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-26 02:57:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-26 02:57:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2019-11-26 02:57:17,643 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 9 [2019-11-26 02:57:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:57:17,644 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2019-11-26 02:57:17,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:57:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2019-11-26 02:57:17,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-26 02:57:17,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:17,648 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:17,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:57:17,850 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:17,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:17,851 INFO L82 PathProgramCache]: Analyzing trace with hash 495326291, now seen corresponding path program 1 times [2019-11-26 02:57:17,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:57:17,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1824145571] [2019-11-26 02:57:17,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:57:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:17,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:57:17,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-26 02:57:17,940 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:57:18,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1824145571] [2019-11-26 02:57:18,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147371300] [2019-11-26 02:57:18,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/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 [2019-11-26 02:57:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:18,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:57:18,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-26 02:57:18,200 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:57:18,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:57:18,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [6, 7] total 14 [2019-11-26 02:57:18,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537206801] [2019-11-26 02:57:18,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-26 02:57:18,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:57:18,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-26 02:57:18,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-11-26 02:57:18,426 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2019-11-26 02:57:18,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:57:18,811 INFO L93 Difference]: Finished difference Result 73 states and 197 transitions. [2019-11-26 02:57:18,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:57:18,813 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2019-11-26 02:57:18,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:57:18,819 INFO L225 Difference]: With dead ends: 73 [2019-11-26 02:57:18,819 INFO L226 Difference]: Without dead ends: 55 [2019-11-26 02:57:18,826 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:57:18,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-26 02:57:18,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2019-11-26 02:57:18,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-26 02:57:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2019-11-26 02:57:18,887 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 23 [2019-11-26 02:57:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:57:18,888 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2019-11-26 02:57:18,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-26 02:57:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2019-11-26 02:57:18,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-26 02:57:18,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:18,901 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:19,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:57:19,304 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:19,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:19,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2106720969, now seen corresponding path program 1 times [2019-11-26 02:57:19,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:57:19,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [373635448] [2019-11-26 02:57:19,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:57:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:19,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:57:19,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-26 02:57:19,400 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-26 02:57:19,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [373635448] [2019-11-26 02:57:19,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384421006] [2019-11-26 02:57:19,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/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 [2019-11-26 02:57:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:19,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:57:19,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-26 02:57:19,691 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-26 02:57:19,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:57:19,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7] total 10 [2019-11-26 02:57:19,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385790042] [2019-11-26 02:57:19,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:57:19,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:57:19,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:57:19,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:57:19,862 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 10 states. [2019-11-26 02:57:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:57:20,015 INFO L93 Difference]: Finished difference Result 105 states and 332 transitions. [2019-11-26 02:57:20,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:57:20,017 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-11-26 02:57:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:57:20,021 INFO L225 Difference]: With dead ends: 105 [2019-11-26 02:57:20,021 INFO L226 Difference]: Without dead ends: 60 [2019-11-26 02:57:20,024 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-26 02:57:20,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-26 02:57:20,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2019-11-26 02:57:20,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-26 02:57:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 119 transitions. [2019-11-26 02:57:20,046 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 119 transitions. Word has length 34 [2019-11-26 02:57:20,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:57:20,047 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 119 transitions. [2019-11-26 02:57:20,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:57:20,047 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 119 transitions. [2019-11-26 02:57:20,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-26 02:57:20,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:20,051 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:20,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:57:20,453 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:20,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:20,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2019802137, now seen corresponding path program 2 times [2019-11-26 02:57:20,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:57:20,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1341426886] [2019-11-26 02:57:20,454 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:57:20,522 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:57:20,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:57:20,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:57:20,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 68 proven. 44 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-26 02:57:20,582 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 68 proven. 52 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-26 02:57:20,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1341426886] [2019-11-26 02:57:20,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158325633] [2019-11-26 02:57:20,964 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/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 [2019-11-26 02:57:21,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:57:21,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:57:21,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:57:21,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 90 proven. 46 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-26 02:57:21,113 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:21,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:57:21,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:57:21,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:57:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 91 proven. 74 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-26 02:57:21,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:57:21,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9, 13] total 21 [2019-11-26 02:57:21,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843177266] [2019-11-26 02:57:21,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-26 02:57:21,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:57:21,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-26 02:57:21,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2019-11-26 02:57:21,869 INFO L87 Difference]: Start difference. First operand 48 states and 119 transitions. Second operand 21 states. [2019-11-26 02:57:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:57:22,652 INFO L93 Difference]: Finished difference Result 151 states and 612 transitions. [2019-11-26 02:57:22,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-26 02:57:22,652 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2019-11-26 02:57:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:57:22,658 INFO L225 Difference]: With dead ends: 151 [2019-11-26 02:57:22,658 INFO L226 Difference]: Without dead ends: 95 [2019-11-26 02:57:22,660 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 250 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2019-11-26 02:57:22,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-26 02:57:22,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 73. [2019-11-26 02:57:22,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-26 02:57:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 201 transitions. [2019-11-26 02:57:22,686 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 201 transitions. Word has length 70 [2019-11-26 02:57:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:57:22,686 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 201 transitions. [2019-11-26 02:57:22,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-26 02:57:22,686 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 201 transitions. [2019-11-26 02:57:22,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-26 02:57:22,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:22,690 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:23,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:57:23,092 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:23,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:23,093 INFO L82 PathProgramCache]: Analyzing trace with hash -148612243, now seen corresponding path program 3 times [2019-11-26 02:57:23,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:57:23,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [143071404] [2019-11-26 02:57:23,094 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:57:23,169 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-26 02:57:23,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:57:23,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-26 02:57:23,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 87 proven. 9 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-26 02:57:23,293 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 86 proven. 13 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-26 02:57:23,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [143071404] [2019-11-26 02:57:23,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972498328] [2019-11-26 02:57:23,923 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:57:23,962 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-26 02:57:23,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:57:23,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-26 02:57:23,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 84 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-26 02:57:24,012 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 87 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-26 02:57:24,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:57:24,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7, 10] total 15 [2019-11-26 02:57:24,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988393001] [2019-11-26 02:57:24,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-26 02:57:24,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:57:24,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-26 02:57:24,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:57:24,590 INFO L87 Difference]: Start difference. First operand 73 states and 201 transitions. Second operand 15 states. [2019-11-26 02:57:25,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:57:25,113 INFO L93 Difference]: Finished difference Result 177 states and 722 transitions. [2019-11-26 02:57:25,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-26 02:57:25,115 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-11-26 02:57:25,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:57:25,118 INFO L225 Difference]: With dead ends: 177 [2019-11-26 02:57:25,118 INFO L226 Difference]: Without dead ends: 106 [2019-11-26 02:57:25,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 212 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2019-11-26 02:57:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-26 02:57:25,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2019-11-26 02:57:25,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-26 02:57:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 238 transitions. [2019-11-26 02:57:25,164 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 238 transitions. Word has length 58 [2019-11-26 02:57:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:57:25,165 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 238 transitions. [2019-11-26 02:57:25,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-26 02:57:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 238 transitions. [2019-11-26 02:57:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-26 02:57:25,169 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:25,169 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:25,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:57:25,571 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:25,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:25,571 INFO L82 PathProgramCache]: Analyzing trace with hash 16260461, now seen corresponding path program 4 times [2019-11-26 02:57:25,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:57:25,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1534556062] [2019-11-26 02:57:25,573 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:57:25,626 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-26 02:57:25,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:57:25,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-26 02:57:25,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 109 proven. 62 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2019-11-26 02:57:25,695 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 109 proven. 77 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-26 02:57:26,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1534556062] [2019-11-26 02:57:26,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009081150] [2019-11-26 02:57:26,219 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:57:26,283 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-26 02:57:26,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:57:26,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:57:26,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 170 proven. 26 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-11-26 02:57:26,588 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:27,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:57:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 170 proven. 33 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2019-11-26 02:57:27,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:57:27,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10, 13] total 26 [2019-11-26 02:57:27,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783780646] [2019-11-26 02:57:27,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-26 02:57:27,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:57:27,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-26 02:57:27,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2019-11-26 02:57:27,968 INFO L87 Difference]: Start difference. First operand 83 states and 238 transitions. Second operand 26 states. [2019-11-26 02:57:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:57:29,007 INFO L93 Difference]: Finished difference Result 150 states and 455 transitions. [2019-11-26 02:57:29,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-26 02:57:29,009 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2019-11-26 02:57:29,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:57:29,010 INFO L225 Difference]: With dead ends: 150 [2019-11-26 02:57:29,010 INFO L226 Difference]: Without dead ends: 67 [2019-11-26 02:57:29,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 297 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2019-11-26 02:57:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-26 02:57:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2019-11-26 02:57:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-26 02:57:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 80 transitions. [2019-11-26 02:57:29,021 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 80 transitions. Word has length 82 [2019-11-26 02:57:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:57:29,021 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 80 transitions. [2019-11-26 02:57:29,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-26 02:57:29,021 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 80 transitions. [2019-11-26 02:57:29,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-26 02:57:29,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:29,023 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:29,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:57:29,427 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:29,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:29,427 INFO L82 PathProgramCache]: Analyzing trace with hash -46374959, now seen corresponding path program 5 times [2019-11-26 02:57:29,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:57:29,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [408902893] [2019-11-26 02:57:29,427 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:57:29,613 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-26 02:57:29,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-26 02:57:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:57:29,762 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:57:29,762 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:57:29,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:57:29,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:57:29 BoogieIcfgContainer [2019-11-26 02:57:29,995 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:57:29,995 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:57:29,996 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:57:29,996 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:57:29,996 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:57:16" (3/4) ... [2019-11-26 02:57:29,998 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:57:30,068 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4b599d91-8477-4bb8-8c53-26f79ca01790/bin/utaipan/witness.graphml [2019-11-26 02:57:30,068 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:57:30,071 INFO L168 Benchmark]: Toolchain (without parser) took 13728.08 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 319.3 MB). Free memory was 960.4 MB in the beginning and 1.2 GB in the end (delta: -288.0 MB). Peak memory consumption was 31.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:30,071 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:57:30,073 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.79 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:30,079 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.08 ms. Allocated memory is still 1.0 GB. Free memory is still 949.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:57:30,080 INFO L168 Benchmark]: Boogie Preprocessor took 102.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 949.7 MB in the beginning and 1.1 GB in the end (delta: -199.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:30,080 INFO L168 Benchmark]: RCFGBuilder took 235.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:30,080 INFO L168 Benchmark]: TraceAbstraction took 13028.66 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 167.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -119.0 MB). Peak memory consumption was 48.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:30,081 INFO L168 Benchmark]: Witness Printer took 72.91 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:57:30,082 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 249.79 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.08 ms. Allocated memory is still 1.0 GB. Free memory is still 949.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 102.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 949.7 MB in the beginning and 1.1 GB in the end (delta: -199.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 235.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 13028.66 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 167.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -119.0 MB). Peak memory consumption was 48.2 MB. Max. memory is 11.5 GB. * Witness Printer took 72.91 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L28] int x = __VERIFIER_nondet_int(); [L29] CALL, EXPR fibonacci(x) VAL [\old(n)=5] [L17] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L19] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=4] [L17] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L19] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=4, fibonacci(n-1)=2, n=4] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=4, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=5, fibonacci(n-1)=3, n=5] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L22] return fibonacci(n-1) + fibonacci(n-2); [L29] RET, EXPR fibonacci(x) [L29] int result = fibonacci(x); [L30] COND FALSE !(x != 5 || result == 3) [L33] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 12.9s, OverallIterations: 7, TraceHistogramMax: 15, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 102 SDtfs, 223 SDslu, 398 SDs, 0 SdLazy, 1063 SolverSat, 372 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1106 GetRequests, 965 SyntacticMatches, 20 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 6 MinimizatonAttempts, 80 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 641 NumberOfCodeBlocks, 599 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1064 ConstructedInterpolants, 0 QuantifiedInterpolants, 195901 SizeOfPredicates, 53 NumberOfNonLiveVariables, 727 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 3004/3504 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...