./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 cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04.c -s /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04.c -s /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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-cad4683 [2019-10-22 11:22:08,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:22:08,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:22:08,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:22:08,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:22:08,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:22:08,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:22:08,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:22:08,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:22:08,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:22:08,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:22:08,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:22:08,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:22:08,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:22:08,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:22:08,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:22:08,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:22:08,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:22:08,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:22:08,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:22:08,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:22:08,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:22:08,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:22:08,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:22:08,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:22:08,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:22:08,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:22:08,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:22:08,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:22:08,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:22:08,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:22:08,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:22:08,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:22:08,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:22:08,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:22:08,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:22:08,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:22:08,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:22:08,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:22:08,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:22:08,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:22:08,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:22:08,600 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:22:08,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:22:08,601 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:22:08,601 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:22:08,601 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:22:08,602 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:22:08,602 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:22:08,602 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:22:08,602 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:22:08,602 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:22:08,602 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:22:08,602 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:22:08,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:22:08,613 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:22:08,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:22:08,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:22:08,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:22:08,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:22:08,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:22:08,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:22:08,614 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:22:08,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:22:08,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:22:08,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:22:08,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:22:08,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:22:08,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:22:08,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:22:08,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:22:08,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:22:08,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:22:08,616 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:22:08,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:22:08,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:22:08,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:22:08,616 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/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:08,643 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:22:08,655 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:22:08,659 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:22:08,660 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:22:08,660 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:22:08,661 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/../../sv-benchmarks/c/recursive/Fibonacci04.c [2019-10-22 11:22:08,708 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/data/9f1867d36/1c3da3a202fa416a8156bbb541b3e39d/FLAGfa50530be [2019-10-22 11:22:09,093 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:22:09,093 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/sv-benchmarks/c/recursive/Fibonacci04.c [2019-10-22 11:22:09,098 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/data/9f1867d36/1c3da3a202fa416a8156bbb541b3e39d/FLAGfa50530be [2019-10-22 11:22:09,111 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/data/9f1867d36/1c3da3a202fa416a8156bbb541b3e39d [2019-10-22 11:22:09,114 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:22:09,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:22:09,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:09,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:22:09,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:22:09,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:09" (1/1) ... [2019-10-22 11:22:09,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f2d2514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:09, skipping insertion in model container [2019-10-22 11:22:09,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:09" (1/1) ... [2019-10-22 11:22:09,133 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:22:09,147 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:22:09,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:09,309 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:22:09,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:09,402 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:22:09,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:09 WrapperNode [2019-10-22 11:22:09,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:09,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:09,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:22:09,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:22:09,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:09" (1/1) ... [2019-10-22 11:22:09,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:09" (1/1) ... [2019-10-22 11:22:09,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:09,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:22:09,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:22:09,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:22:09,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:09" (1/1) ... [2019-10-22 11:22:09,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:09" (1/1) ... [2019-10-22 11:22:09,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:09" (1/1) ... [2019-10-22 11:22:09,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:09" (1/1) ... [2019-10-22 11:22:09,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:09" (1/1) ... [2019-10-22 11:22:09,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:09" (1/1) ... [2019-10-22 11:22:09,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:09" (1/1) ... [2019-10-22 11:22:09,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:22:09,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:22:09,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:22:09,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:22:09,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:09,510 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2019-10-22 11:22:09,510 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2019-10-22 11:22:09,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:22:09,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:22:09,657 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:22:09,657 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:22:09,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:09 BoogieIcfgContainer [2019-10-22 11:22:09,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:22:09,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:22:09,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:22:09,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:22:09,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:22:09" (1/3) ... [2019-10-22 11:22:09,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d63807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:09, skipping insertion in model container [2019-10-22 11:22:09,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:09" (2/3) ... [2019-10-22 11:22:09,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d63807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:09, skipping insertion in model container [2019-10-22 11:22:09,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:09" (3/3) ... [2019-10-22 11:22:09,665 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2019-10-22 11:22:09,673 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:22:09,679 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:22:09,688 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:22:09,708 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:22:09,709 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:22:09,709 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:22:09,709 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:22:09,709 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:22:09,709 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:22:09,709 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:22:09,709 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:22:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-22 11:22:09,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:22:09,729 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:09,730 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:09,731 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:09,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:09,736 INFO L82 PathProgramCache]: Analyzing trace with hash 238562696, now seen corresponding path program 1 times [2019-10-22 11:22:09,744 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:09,745 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622601427] [2019-10-22 11:22:09,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:09,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:09,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:09,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622601427] [2019-10-22 11:22:09,881 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:09,881 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 11:22:09,881 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59695549] [2019-10-22 11:22:09,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:22:09,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:22:09,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:22:09,904 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2019-10-22 11:22:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:09,986 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-10-22 11:22:09,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:22:09,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-10-22 11:22:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:09,996 INFO L225 Difference]: With dead ends: 30 [2019-10-22 11:22:09,996 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 11:22:10,000 INFO L600 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 [2019-10-22 11:22:10,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 11:22:10,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 11:22:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 11:22:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-10-22 11:22:10,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-10-22 11:22:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:10,056 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-10-22 11:22:10,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:22:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-10-22 11:22:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:22:10,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:10,058 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:10,058 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:10,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:10,058 INFO L82 PathProgramCache]: Analyzing trace with hash -497654578, now seen corresponding path program 1 times [2019-10-22 11:22:10,059 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:10,059 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435159269] [2019-10-22 11:22:10,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:10,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:10,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:10,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435159269] [2019-10-22 11:22:10,103 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:10,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 11:22:10,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588082226] [2019-10-22 11:22:10,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:22:10,105 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:10,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:22:10,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:22:10,106 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2019-10-22 11:22:10,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:10,175 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-10-22 11:22:10,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:22:10,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-22 11:22:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:10,178 INFO L225 Difference]: With dead ends: 23 [2019-10-22 11:22:10,178 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 11:22:10,179 INFO L600 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 [2019-10-22 11:22:10,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 11:22:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-10-22 11:22:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 11:22:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-10-22 11:22:10,188 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-10-22 11:22:10,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:10,188 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-10-22 11:22:10,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:22:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-10-22 11:22:10,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 11:22:10,189 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:10,189 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:10,190 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:10,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:10,190 INFO L82 PathProgramCache]: Analyzing trace with hash -850570499, now seen corresponding path program 1 times [2019-10-22 11:22:10,190 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:10,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166867784] [2019-10-22 11:22:10,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:10,191 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:10,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:22:10,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166867784] [2019-10-22 11:22:10,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134745045] [2019-10-22 11:22:10,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:10,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:22:10,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:22:10,334 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:10,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 11:22:10,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1707441083] [2019-10-22 11:22:10,485 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 23 [2019-10-22 11:22:10,519 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:22:10,520 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:22:10,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:10,795 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) 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.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) 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:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) 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) [2019-10-22 11:22:10,800 INFO L168 Benchmark]: Toolchain (without parser) took 1683.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.2 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -119.4 MB). Peak memory consumption was 56.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:10,801 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:10,801 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.2 MB). Free memory was 944.5 MB in the beginning and 1.2 GB in the end (delta: -226.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:10,802 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.06 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:10,802 INFO L168 Benchmark]: Boogie Preprocessor took 19.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:10,803 INFO L168 Benchmark]: RCFGBuilder took 206.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:10,803 INFO L168 Benchmark]: TraceAbstraction took 1139.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 88.8 MB). Peak memory consumption was 88.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:10,806 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 285.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.2 MB). Free memory was 944.5 MB in the beginning and 1.2 GB in the end (delta: -226.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.06 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 206.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1139.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 88.8 MB). Peak memory consumption was 88.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:22:12,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:22:12,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:22:12,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:22:12,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:22:12,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:22:12,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:22:12,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:22:12,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:22:12,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:22:12,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:22:12,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:22:12,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:22:12,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:22:12,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:22:12,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:22:12,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:22:12,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:22:12,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:22:12,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:22:12,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:22:12,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:22:12,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:22:12,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:22:12,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:22:12,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:22:12,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:22:12,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:22:12,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:22:12,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:22:12,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:22:12,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:22:12,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:22:12,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:22:12,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:22:12,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:22:12,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:22:12,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:22:12,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:22:12,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:22:12,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:22:12,843 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:22:12,855 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:22:12,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:22:12,856 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:22:12,856 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:22:12,856 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:22:12,857 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:22:12,857 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:22:12,857 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:22:12,857 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:22:12,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:22:12,858 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:22:12,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:22:12,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:22:12,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:22:12,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:22:12,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:22:12,858 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:22:12,861 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:22:12,861 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:22:12,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:22:12,862 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:22:12,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:22:12,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:22:12,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:22:12,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:22:12,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:22:12,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:22:12,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:22:12,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:22:12,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:22:12,863 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:22:12,863 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:22:12,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:22:12,864 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:22:12,864 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/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:12,905 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:22:12,916 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:22:12,919 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:22:12,921 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:22:12,922 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:22:12,922 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/../../sv-benchmarks/c/recursive/Fibonacci04.c [2019-10-22 11:22:12,972 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/data/26347664c/2978ce75743745b4a0f60937c7b2fcb6/FLAG52d0d6b00 [2019-10-22 11:22:13,340 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:22:13,341 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/sv-benchmarks/c/recursive/Fibonacci04.c [2019-10-22 11:22:13,346 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/data/26347664c/2978ce75743745b4a0f60937c7b2fcb6/FLAG52d0d6b00 [2019-10-22 11:22:13,738 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/data/26347664c/2978ce75743745b4a0f60937c7b2fcb6 [2019-10-22 11:22:13,741 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:22:13,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:22:13,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:13,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:22:13,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:22:13,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:13" (1/1) ... [2019-10-22 11:22:13,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a93105e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:13, skipping insertion in model container [2019-10-22 11:22:13,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:13" (1/1) ... [2019-10-22 11:22:13,756 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:22:13,771 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:22:13,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:13,918 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:22:13,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:13,948 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:22:13,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:13 WrapperNode [2019-10-22 11:22:13,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:13,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:13,949 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:22:13,949 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:22:13,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:13" (1/1) ... [2019-10-22 11:22:13,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:13" (1/1) ... [2019-10-22 11:22:14,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:14,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:22:14,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:22:14,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:22:14,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:13" (1/1) ... [2019-10-22 11:22:14,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:13" (1/1) ... [2019-10-22 11:22:14,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:13" (1/1) ... [2019-10-22 11:22:14,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:13" (1/1) ... [2019-10-22 11:22:14,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:13" (1/1) ... [2019-10-22 11:22:14,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:13" (1/1) ... [2019-10-22 11:22:14,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:13" (1/1) ... [2019-10-22 11:22:14,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:22:14,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:22:14,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:22:14,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:22:14,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:14,078 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2019-10-22 11:22:14,078 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2019-10-22 11:22:14,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:22:14,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:22:14,207 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:22:14,207 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:22:14,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:14 BoogieIcfgContainer [2019-10-22 11:22:14,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:22:14,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:22:14,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:22:14,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:22:14,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:22:13" (1/3) ... [2019-10-22 11:22:14,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7e98fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:14, skipping insertion in model container [2019-10-22 11:22:14,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:13" (2/3) ... [2019-10-22 11:22:14,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7e98fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:14, skipping insertion in model container [2019-10-22 11:22:14,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:14" (3/3) ... [2019-10-22 11:22:14,215 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2019-10-22 11:22:14,224 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:22:14,230 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:22:14,251 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:22:14,272 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:22:14,272 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:22:14,272 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:22:14,272 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:22:14,272 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:22:14,272 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:22:14,272 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:22:14,272 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:22:14,287 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-22 11:22:14,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:22:14,293 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:14,293 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:14,295 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:14,307 INFO L82 PathProgramCache]: Analyzing trace with hash 302252519, now seen corresponding path program 1 times [2019-10-22 11:22:14,323 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:14,324 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1682740209] [2019-10-22 11:22:14,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:14,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:22:14,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:14,440 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:14,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1682740209] [2019-10-22 11:22:14,539 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:14,539 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-22 11:22:14,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175700281] [2019-10-22 11:22:14,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 11:22:14,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:14,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 11:22:14,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:22:14,554 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 8 states. [2019-10-22 11:22:14,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:14,687 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2019-10-22 11:22:14,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:22:14,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-10-22 11:22:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:14,697 INFO L225 Difference]: With dead ends: 38 [2019-10-22 11:22:14,698 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 11:22:14,701 INFO L600 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 [2019-10-22 11:22:14,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 11:22:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 11:22:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 11:22:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2019-10-22 11:22:14,740 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 9 [2019-10-22 11:22:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:14,741 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2019-10-22 11:22:14,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 11:22:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2019-10-22 11:22:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 11:22:14,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:14,743 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:14,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:14,944 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:14,945 INFO L82 PathProgramCache]: Analyzing trace with hash 495326291, now seen corresponding path program 1 times [2019-10-22 11:22:14,945 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:14,945 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [491096153] [2019-10-22 11:22:14,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:14,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:22:14,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 11:22:15,026 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 11:22:15,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [491096153] [2019-10-22 11:22:15,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137271783] [2019-10-22 11:22:15,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:15,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:22:15,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:15,264 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 11:22:15,266 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 11:22:15,447 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-10-22 11:22:15,448 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [6, 7] total 14 [2019-10-22 11:22:15,448 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168170785] [2019-10-22 11:22:15,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 11:22:15,450 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:15,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 11:22:15,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-10-22 11:22:15,451 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2019-10-22 11:22:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:15,771 INFO L93 Difference]: Finished difference Result 73 states and 197 transitions. [2019-10-22 11:22:15,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 11:22:15,772 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2019-10-22 11:22:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:15,776 INFO L225 Difference]: With dead ends: 73 [2019-10-22 11:22:15,776 INFO L226 Difference]: Without dead ends: 55 [2019-10-22 11:22:15,777 INFO L600 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 [2019-10-22 11:22:15,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-22 11:22:15,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2019-10-22 11:22:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-22 11:22:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2019-10-22 11:22:15,805 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 23 [2019-10-22 11:22:15,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:15,805 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2019-10-22 11:22:15,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 11:22:15,805 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2019-10-22 11:22:15,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-22 11:22:15,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:15,810 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:16,211 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 [2019-10-22 11:22:16,211 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:16,212 INFO L82 PathProgramCache]: Analyzing trace with hash 2106720969, now seen corresponding path program 1 times [2019-10-22 11:22:16,212 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:16,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2059480182] [2019-10-22 11:22:16,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:16,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:22:16,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-22 11:22:16,288 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-22 11:22:16,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2059480182] [2019-10-22 11:22:16,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121426824] [2019-10-22 11:22:16,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:16,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:22:16,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-22 11:22:16,526 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-22 11:22:16,642 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:16,642 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7] total 10 [2019-10-22 11:22:16,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948193399] [2019-10-22 11:22:16,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 11:22:16,643 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:16,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 11:22:16,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:22:16,644 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 10 states. [2019-10-22 11:22:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:16,778 INFO L93 Difference]: Finished difference Result 105 states and 332 transitions. [2019-10-22 11:22:16,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:22:16,779 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-10-22 11:22:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:16,782 INFO L225 Difference]: With dead ends: 105 [2019-10-22 11:22:16,783 INFO L226 Difference]: Without dead ends: 60 [2019-10-22 11:22:16,785 INFO L600 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 [2019-10-22 11:22:16,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-22 11:22:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2019-10-22 11:22:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-22 11:22:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 119 transitions. [2019-10-22 11:22:16,805 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 119 transitions. Word has length 34 [2019-10-22 11:22:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:16,806 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 119 transitions. [2019-10-22 11:22:16,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 11:22:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 119 transitions. [2019-10-22 11:22:16,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-22 11:22:16,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:16,810 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:17,210 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 [2019-10-22 11:22:17,211 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2019802137, now seen corresponding path program 2 times [2019-10-22 11:22:17,212 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:17,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1133378016] [2019-10-22 11:22:17,212 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:17,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:22:17,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:17,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:22:17,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 68 proven. 44 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-10-22 11:22:17,322 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 68 proven. 52 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-22 11:22:17,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1133378016] [2019-10-22 11:22:17,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259253090] [2019-10-22 11:22:17,626 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:17,707 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:22:17,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:17,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 11:22:17,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 90 proven. 46 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-10-22 11:22:17,805 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:18,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:18,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:18,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 91 proven. 74 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-22 11:22:18,358 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:18,358 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9, 13] total 21 [2019-10-22 11:22:18,358 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837480502] [2019-10-22 11:22:18,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-22 11:22:18,359 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:18,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-22 11:22:18,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2019-10-22 11:22:18,360 INFO L87 Difference]: Start difference. First operand 48 states and 119 transitions. Second operand 21 states. [2019-10-22 11:22:18,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:18,925 INFO L93 Difference]: Finished difference Result 151 states and 612 transitions. [2019-10-22 11:22:18,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-22 11:22:18,926 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2019-10-22 11:22:18,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:18,937 INFO L225 Difference]: With dead ends: 151 [2019-10-22 11:22:18,939 INFO L226 Difference]: Without dead ends: 95 [2019-10-22 11:22:18,941 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 250 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2019-10-22 11:22:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-22 11:22:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 73. [2019-10-22 11:22:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-22 11:22:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 201 transitions. [2019-10-22 11:22:18,979 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 201 transitions. Word has length 70 [2019-10-22 11:22:18,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:18,980 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 201 transitions. [2019-10-22 11:22:18,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-22 11:22:18,980 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 201 transitions. [2019-10-22 11:22:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-22 11:22:18,992 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:18,994 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:19,395 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 [2019-10-22 11:22:19,396 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:19,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:19,396 INFO L82 PathProgramCache]: Analyzing trace with hash -148612243, now seen corresponding path program 3 times [2019-10-22 11:22:19,397 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:19,397 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [442927657] [2019-10-22 11:22:19,397 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:19,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 11:22:19,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:19,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:22:19,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 87 proven. 9 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-22 11:22:19,541 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 86 proven. 13 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-22 11:22:20,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [442927657] [2019-10-22 11:22:20,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331395328] [2019-10-22 11:22:20,065 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:20,127 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 11:22:20,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:20,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:22:20,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 84 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-22 11:22:20,181 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 87 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-22 11:22:20,548 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:20,549 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7, 10] total 15 [2019-10-22 11:22:20,549 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916267091] [2019-10-22 11:22:20,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 11:22:20,549 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:20,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 11:22:20,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-10-22 11:22:20,550 INFO L87 Difference]: Start difference. First operand 73 states and 201 transitions. Second operand 15 states. [2019-10-22 11:22:20,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:20,948 INFO L93 Difference]: Finished difference Result 177 states and 722 transitions. [2019-10-22 11:22:20,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 11:22:20,949 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-10-22 11:22:20,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:20,951 INFO L225 Difference]: With dead ends: 177 [2019-10-22 11:22:20,951 INFO L226 Difference]: Without dead ends: 106 [2019-10-22 11:22:20,953 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 212 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2019-10-22 11:22:20,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-22 11:22:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2019-10-22 11:22:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-22 11:22:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 238 transitions. [2019-10-22 11:22:20,972 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 238 transitions. Word has length 58 [2019-10-22 11:22:20,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:20,973 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 238 transitions. [2019-10-22 11:22:20,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 11:22:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 238 transitions. [2019-10-22 11:22:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-22 11:22:20,975 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:20,975 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:21,375 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 [2019-10-22 11:22:21,376 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:21,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:21,376 INFO L82 PathProgramCache]: Analyzing trace with hash 16260461, now seen corresponding path program 4 times [2019-10-22 11:22:21,376 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:21,376 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1444664394] [2019-10-22 11:22:21,377 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:21,446 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:22:21,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:21,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 11:22:21,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 109 proven. 62 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2019-10-22 11:22:21,483 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 109 proven. 77 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-22 11:22:21,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1444664394] [2019-10-22 11:22:21,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925812385] [2019-10-22 11:22:21,862 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:21,942 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:22:21,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:21,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 11:22:21,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 170 proven. 26 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-10-22 11:22:22,146 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:23,083 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 170 proven. 33 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2019-10-22 11:22:23,335 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:23,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10, 13] total 26 [2019-10-22 11:22:23,335 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445456104] [2019-10-22 11:22:23,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-22 11:22:23,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:23,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-22 11:22:23,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2019-10-22 11:22:23,336 INFO L87 Difference]: Start difference. First operand 83 states and 238 transitions. Second operand 26 states. [2019-10-22 11:22:23,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:23,974 INFO L93 Difference]: Finished difference Result 150 states and 455 transitions. [2019-10-22 11:22:23,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 11:22:23,976 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2019-10-22 11:22:23,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:23,977 INFO L225 Difference]: With dead ends: 150 [2019-10-22 11:22:23,977 INFO L226 Difference]: Without dead ends: 67 [2019-10-22 11:22:23,978 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 297 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2019-10-22 11:22:23,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-22 11:22:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2019-10-22 11:22:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-22 11:22:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 80 transitions. [2019-10-22 11:22:23,986 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 80 transitions. Word has length 82 [2019-10-22 11:22:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:23,987 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 80 transitions. [2019-10-22 11:22:23,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-22 11:22:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 80 transitions. [2019-10-22 11:22:23,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-22 11:22:23,988 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:23,988 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:24,388 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 [2019-10-22 11:22:24,389 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:24,389 INFO L82 PathProgramCache]: Analyzing trace with hash -46374959, now seen corresponding path program 5 times [2019-10-22 11:22:24,389 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:24,389 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [823291643] [2019-10-22 11:22:24,389 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/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 [2019-10-22 11:22:24,563 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-22 11:22:24,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-10-22 11:22:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:22:24,702 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:22:24,702 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:22:24,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:24,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:22:24 BoogieIcfgContainer [2019-10-22 11:22:24,930 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:22:24,930 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:22:24,930 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:22:24,930 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:22:24,931 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:14" (3/4) ... [2019-10-22 11:22:24,933 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:22:24,981 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_1a0f4b98-04ef-4641-a342-1a73d91a7e8f/bin/utaipan/witness.graphml [2019-10-22 11:22:24,981 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:22:24,983 INFO L168 Benchmark]: Toolchain (without parser) took 11240.48 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 324.0 MB). Free memory was 945.6 MB in the beginning and 1.2 GB in the end (delta: -299.4 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:24,983 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:24,983 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.17 ms. Allocated memory is still 1.0 GB. Free memory was 945.6 MB in the beginning and 934.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:24,984 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 934.9 MB in the beginning and 1.1 GB in the end (delta: -208.8 MB). Peak memory consumption was 12.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:24,984 INFO L168 Benchmark]: Boogie Preprocessor took 15.01 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. [2019-10-22 11:22:24,984 INFO L168 Benchmark]: RCFGBuilder took 166.77 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: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:24,984 INFO L168 Benchmark]: TraceAbstraction took 10720.79 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 163.6 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -120.5 MB). Peak memory consumption was 43.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:24,985 INFO L168 Benchmark]: Witness Printer took 50.83 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.2 GB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:24,986 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 206.17 ms. Allocated memory is still 1.0 GB. Free memory was 945.6 MB in the beginning and 934.9 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 76.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 934.9 MB in the beginning and 1.1 GB in the end (delta: -208.8 MB). Peak memory consumption was 12.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.01 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. * RCFGBuilder took 166.77 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: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10720.79 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 163.6 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -120.5 MB). Peak memory consumption was 43.1 MB. Max. memory is 11.5 GB. * Witness Printer took 50.83 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.2 GB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. 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: 10.6s, OverallIterations: 7, TraceHistogramMax: 15, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 102 SDtfs, 223 SDslu, 398 SDs, 0 SdLazy, 1062 SolverSat, 378 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1106 GetRequests, 965 SyntacticMatches, 20 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.1s 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: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 80 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.7s 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...