./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci03.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c18b98479d83d3111a28d9798b2d068fc51f15fb ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 04:57:18,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:57:18,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:57:18,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:57:18,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:57:18,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:57:18,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:57:18,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:57:18,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:57:18,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:57:18,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:57:18,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:57:18,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:57:18,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:57:18,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:57:18,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:57:18,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:57:18,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:57:18,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:57:18,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:57:18,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:57:18,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:57:18,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:57:18,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:57:18,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:57:18,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:57:18,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:57:18,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:57:18,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:57:18,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:57:18,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:57:18,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:57:18,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:57:18,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:57:18,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:57:18,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:57:18,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:57:18,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:57:18,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:57:18,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:57:18,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:57:18,790 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 04:57:18,805 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:57:18,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:57:18,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:57:18,806 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:57:18,806 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:57:18,806 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:57:18,807 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 04:57:18,807 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:57:18,807 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:57:18,807 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 04:57:18,807 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 04:57:18,807 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:57:18,807 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 04:57:18,807 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 04:57:18,807 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 04:57:18,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:57:18,808 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:57:18,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 04:57:18,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:57:18,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:57:18,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 04:57:18,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:57:18,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 04:57:18,809 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:57:18,809 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:57:18,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 04:57:18,809 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:57:18,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 04:57:18,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:57:18,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:57:18,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:57:18,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:57:18,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:57:18,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 04:57:18,810 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 04:57:18,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 04:57:18,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 04:57:18,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:57:18,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:57:18,810 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c18b98479d83d3111a28d9798b2d068fc51f15fb [2020-12-09 04:57:18,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:57:19,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:57:19,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:57:19,017 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:57:19,018 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:57:19,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/../../sv-benchmarks/c/recursive/Fibonacci03.c [2020-12-09 04:57:19,061 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/data/c808b5199/e36fe9ffde7f42939c3231c585712df2/FLAG8d7e06ac7 [2020-12-09 04:57:19,421 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:57:19,421 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/sv-benchmarks/c/recursive/Fibonacci03.c [2020-12-09 04:57:19,426 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/data/c808b5199/e36fe9ffde7f42939c3231c585712df2/FLAG8d7e06ac7 [2020-12-09 04:57:19,435 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/data/c808b5199/e36fe9ffde7f42939c3231c585712df2 [2020-12-09 04:57:19,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:57:19,439 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:57:19,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:57:19,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:57:19,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:57:19,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:57:19" (1/1) ... [2020-12-09 04:57:19,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ead7caa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:57:19, skipping insertion in model container [2020-12-09 04:57:19,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:57:19" (1/1) ... [2020-12-09 04:57:19,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:57:19,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:57:19,558 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/sv-benchmarks/c/recursive/Fibonacci03.c[788,801] [2020-12-09 04:57:19,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:57:19,571 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:57:19,581 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/sv-benchmarks/c/recursive/Fibonacci03.c[788,801] [2020-12-09 04:57:19,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:57:19,595 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:57:19,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:57:19 WrapperNode [2020-12-09 04:57:19,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:57:19,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:57:19,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:57:19,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:57:19,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:57:19" (1/1) ... [2020-12-09 04:57:19,609 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:57:19" (1/1) ... [2020-12-09 04:57:19,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:57:19,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:57:19,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:57:19,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:57:19,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:57:19" (1/1) ... [2020-12-09 04:57:19,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:57:19" (1/1) ... [2020-12-09 04:57:19,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:57:19" (1/1) ... [2020-12-09 04:57:19,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:57:19" (1/1) ... [2020-12-09 04:57:19,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:57:19" (1/1) ... [2020-12-09 04:57:19,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:57:19" (1/1) ... [2020-12-09 04:57:19,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:57:19" (1/1) ... [2020-12-09 04:57:19,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:57:19,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:57:19,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:57:19,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:57:19,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:57:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:57:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-12-09 04:57:19,687 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-12-09 04:57:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:57:19,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:57:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 04:57:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:57:19,839 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:57:19,839 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 04:57:19,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:57:19 BoogieIcfgContainer [2020-12-09 04:57:19,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:57:19,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:57:19,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:57:19,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:57:19,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:57:19" (1/3) ... [2020-12-09 04:57:19,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1de9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:57:19, skipping insertion in model container [2020-12-09 04:57:19,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:57:19" (2/3) ... [2020-12-09 04:57:19,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1de9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:57:19, skipping insertion in model container [2020-12-09 04:57:19,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:57:19" (3/3) ... [2020-12-09 04:57:19,847 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci03.c [2020-12-09 04:57:19,856 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:57:19,859 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 04:57:19,866 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 04:57:19,882 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:57:19,882 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 04:57:19,883 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:57:19,883 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:57:19,883 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:57:19,883 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:57:19,883 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:57:19,883 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:57:19,893 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-09 04:57:19,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 04:57:19,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:57:19,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:57:19,897 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:57:19,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:57:19,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1216674335, now seen corresponding path program 1 times [2020-12-09 04:57:19,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:57:19,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930153318] [2020-12-09 04:57:19,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:57:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:57:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:57:20,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930153318] [2020-12-09 04:57:20,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:57:20,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 04:57:20,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807513195] [2020-12-09 04:57:20,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 04:57:20,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:57:20,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 04:57:20,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:57:20,054 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-12-09 04:57:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:57:20,123 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-09 04:57:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:57:20,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 04:57:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:57:20,130 INFO L225 Difference]: With dead ends: 28 [2020-12-09 04:57:20,131 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 04:57:20,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:57:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 04:57:20,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-09 04:57:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 04:57:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-09 04:57:20,160 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2020-12-09 04:57:20,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:57:20,160 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-09 04:57:20,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 04:57:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-09 04:57:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 04:57:20,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:57:20,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:57:20,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 04:57:20,162 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:57:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:57:20,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1629096597, now seen corresponding path program 1 times [2020-12-09 04:57:20,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:57:20,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118100223] [2020-12-09 04:57:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:57:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:57:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:57:20,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118100223] [2020-12-09 04:57:20,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:57:20,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 04:57:20,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842660818] [2020-12-09 04:57:20,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 04:57:20,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:57:20,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 04:57:20,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:57:20,203 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-12-09 04:57:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:57:20,244 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-12-09 04:57:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:57:20,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 04:57:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:57:20,245 INFO L225 Difference]: With dead ends: 24 [2020-12-09 04:57:20,245 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 04:57:20,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:57:20,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 04:57:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-12-09 04:57:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 04:57:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-09 04:57:20,251 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2020-12-09 04:57:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:57:20,251 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-09 04:57:20,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 04:57:20,251 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-09 04:57:20,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 04:57:20,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:57:20,252 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:57:20,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 04:57:20,252 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:57:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:57:20,253 INFO L82 PathProgramCache]: Analyzing trace with hash 161002844, now seen corresponding path program 1 times [2020-12-09 04:57:20,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:57:20,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169136526] [2020-12-09 04:57:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:57:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:57:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 04:57:20,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169136526] [2020-12-09 04:57:20,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856909602] [2020-12-09 04:57:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:57:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:57:20,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 04:57:20,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:57:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 04:57:20,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:57:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 04:57:20,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [191758009] [2020-12-09 04:57:20,584 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-12-09 04:57:20,584 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:57:20,588 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 04:57:20,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:57:20,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2020-12-09 04:57:20,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458279043] [2020-12-09 04:57:20,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 04:57:20,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:57:20,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 04:57:20,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-09 04:57:20,591 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 12 states. [2020-12-09 04:57:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:57:20,717 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2020-12-09 04:57:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 04:57:20,718 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-12-09 04:57:20,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:57:20,719 INFO L225 Difference]: With dead ends: 42 [2020-12-09 04:57:20,719 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 04:57:20,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-12-09 04:57:20,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 04:57:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-09 04:57:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 04:57:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2020-12-09 04:57:20,725 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 23 [2020-12-09 04:57:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:57:20,726 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-12-09 04:57:20,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 04:57:20,726 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2020-12-09 04:57:20,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-09 04:57:20,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:57:20,728 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:57:20,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 04:57:20,930 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:57:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:57:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1890217866, now seen corresponding path program 1 times [2020-12-09 04:57:20,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:57:20,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337926936] [2020-12-09 04:57:20,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:57:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:57:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-09 04:57:21,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337926936] [2020-12-09 04:57:21,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476488939] [2020-12-09 04:57:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:57:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:57:21,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 04:57:21,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:57:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-09 04:57:21,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:57:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-09 04:57:21,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447557020] [2020-12-09 04:57:21,433 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-12-09 04:57:21,433 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:57:21,433 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 04:57:21,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:57:21,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2020-12-09 04:57:21,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964521334] [2020-12-09 04:57:21,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 04:57:21,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:57:21,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 04:57:21,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-12-09 04:57:21,436 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 12 states. [2020-12-09 04:57:21,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:57:21,532 INFO L93 Difference]: Finished difference Result 44 states and 74 transitions. [2020-12-09 04:57:21,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 04:57:21,532 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-12-09 04:57:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:57:21,534 INFO L225 Difference]: With dead ends: 44 [2020-12-09 04:57:21,534 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 04:57:21,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-12-09 04:57:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 04:57:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-12-09 04:57:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-09 04:57:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 60 transitions. [2020-12-09 04:57:21,545 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 60 transitions. Word has length 51 [2020-12-09 04:57:21,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:57:21,545 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 60 transitions. [2020-12-09 04:57:21,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 04:57:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 60 transitions. [2020-12-09 04:57:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-09 04:57:21,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:57:21,554 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 15, 11, 11, 11, 11, 11, 11, 11, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:57:21,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:57:21,756 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:57:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:57:21,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1908799154, now seen corresponding path program 2 times [2020-12-09 04:57:21,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:57:21,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108970031] [2020-12-09 04:57:21,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:57:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:57:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 69 proven. 401 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2020-12-09 04:57:21,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108970031] [2020-12-09 04:57:21,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587547800] [2020-12-09 04:57:21,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:57:21,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-09 04:57:21,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 04:57:22,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 04:57:22,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:57:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 383 proven. 12 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2020-12-09 04:57:22,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:57:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 383 proven. 14 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2020-12-09 04:57:22,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [85800859] [2020-12-09 04:57:22,608 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-12-09 04:57:22,608 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:57:22,608 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 04:57:22,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:57:22,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 17 [2020-12-09 04:57:22,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018534630] [2020-12-09 04:57:22,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-09 04:57:22,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:57:22,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-09 04:57:22,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-12-09 04:57:22,612 INFO L87 Difference]: Start difference. First operand 35 states and 60 transitions. Second operand 17 states. [2020-12-09 04:57:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:57:22,921 INFO L93 Difference]: Finished difference Result 87 states and 174 transitions. [2020-12-09 04:57:22,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-09 04:57:22,921 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 157 [2020-12-09 04:57:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:57:22,924 INFO L225 Difference]: With dead ends: 87 [2020-12-09 04:57:22,924 INFO L226 Difference]: Without dead ends: 55 [2020-12-09 04:57:22,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2020-12-09 04:57:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-09 04:57:22,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-09 04:57:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-09 04:57:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2020-12-09 04:57:22,938 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 157 [2020-12-09 04:57:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:57:22,938 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2020-12-09 04:57:22,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-09 04:57:22,939 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2020-12-09 04:57:22,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-09 04:57:22,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:57:22,942 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:57:23,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:57:23,144 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:57:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:57:23,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1526876107, now seen corresponding path program 3 times [2020-12-09 04:57:23,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:57:23,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155469919] [2020-12-09 04:57:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:57:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:57:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-12-09 04:57:23,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155469919] [2020-12-09 04:57:23,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362373688] [2020-12-09 04:57:23,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:57:23,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 04:57:23,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 04:57:23,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 04:57:23,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:57:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-12-09 04:57:23,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:57:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 573 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2020-12-09 04:57:24,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1899170228] [2020-12-09 04:57:24,530 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-12-09 04:57:24,530 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:57:24,530 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 04:57:24,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:57:24,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2020-12-09 04:57:24,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999575085] [2020-12-09 04:57:24,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-09 04:57:24,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:57:24,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-09 04:57:24,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-09 04:57:24,533 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand 18 states. [2020-12-09 04:57:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:57:24,688 INFO L93 Difference]: Finished difference Result 71 states and 109 transitions. [2020-12-09 04:57:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 04:57:24,688 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 174 [2020-12-09 04:57:24,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:57:24,690 INFO L225 Difference]: With dead ends: 71 [2020-12-09 04:57:24,690 INFO L226 Difference]: Without dead ends: 65 [2020-12-09 04:57:24,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-12-09 04:57:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-09 04:57:24,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-12-09 04:57:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-09 04:57:24,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 102 transitions. [2020-12-09 04:57:24,700 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 102 transitions. Word has length 174 [2020-12-09 04:57:24,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:57:24,701 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 102 transitions. [2020-12-09 04:57:24,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-09 04:57:24,701 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 102 transitions. [2020-12-09 04:57:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2020-12-09 04:57:24,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:57:24,725 INFO L422 BasicCegarLoop]: trace histogram [119, 119, 97, 59, 59, 59, 59, 59, 59, 59, 38, 22, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:57:24,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:57:24,927 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:57:24,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:57:24,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1635488678, now seen corresponding path program 4 times [2020-12-09 04:57:24,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:57:24,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012978526] [2020-12-09 04:57:24,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:57:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:57:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 39584 backedges. 554 proven. 4397 refuted. 0 times theorem prover too weak. 34633 trivial. 0 not checked. [2020-12-09 04:57:25,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012978526] [2020-12-09 04:57:25,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861616560] [2020-12-09 04:57:25,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:57:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:57:25,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 04:57:25,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:57:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 39584 backedges. 554 proven. 4397 refuted. 0 times theorem prover too weak. 34633 trivial. 0 not checked. [2020-12-09 04:57:26,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:57:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 39584 backedges. 554 proven. 4474 refuted. 0 times theorem prover too weak. 34556 trivial. 0 not checked. [2020-12-09 04:57:29,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [528542657] [2020-12-09 04:57:29,673 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-12-09 04:57:29,673 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:57:29,673 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 04:57:29,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:57:29,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 20 [2020-12-09 04:57:29,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301727091] [2020-12-09 04:57:29,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-09 04:57:29,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:57:29,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-09 04:57:29,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-12-09 04:57:29,676 INFO L87 Difference]: Start difference. First operand 65 states and 102 transitions. Second operand 20 states. [2020-12-09 04:57:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:57:29,891 INFO L93 Difference]: Finished difference Result 77 states and 130 transitions. [2020-12-09 04:57:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 04:57:29,891 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 815 [2020-12-09 04:57:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:57:29,895 INFO L225 Difference]: With dead ends: 77 [2020-12-09 04:57:29,895 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 04:57:29,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1655 GetRequests, 1628 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-12-09 04:57:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 04:57:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-12-09 04:57:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-09 04:57:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 119 transitions. [2020-12-09 04:57:29,905 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 119 transitions. Word has length 815 [2020-12-09 04:57:29,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:57:29,907 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 119 transitions. [2020-12-09 04:57:29,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-09 04:57:29,907 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 119 transitions. [2020-12-09 04:57:29,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2020-12-09 04:57:29,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:57:29,915 INFO L422 BasicCegarLoop]: trace histogram [155, 155, 125, 77, 77, 77, 77, 77, 77, 77, 48, 30, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:57:30,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-09 04:57:30,116 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:57:30,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:57:30,118 INFO L82 PathProgramCache]: Analyzing trace with hash -659816108, now seen corresponding path program 5 times [2020-12-09 04:57:30,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:57:30,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353778096] [2020-12-09 04:57:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:57:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:57:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 2124 proven. 8643 refuted. 0 times theorem prover too weak. 56427 trivial. 0 not checked. [2020-12-09 04:57:31,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353778096] [2020-12-09 04:57:31,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388029763] [2020-12-09 04:57:31,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:57:31,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2020-12-09 04:57:31,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 04:57:31,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 04:57:31,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:57:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 6285 proven. 293 refuted. 0 times theorem prover too weak. 60616 trivial. 0 not checked. [2020-12-09 04:57:32,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:57:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 6285 proven. 314 refuted. 0 times theorem prover too weak. 60595 trivial. 0 not checked. [2020-12-09 04:57:35,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175933642] [2020-12-09 04:57:35,739 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-12-09 04:57:35,740 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:57:35,740 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 04:57:35,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:57:35,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 17] total 30 [2020-12-09 04:57:35,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57076299] [2020-12-09 04:57:35,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-09 04:57:35,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:57:35,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-09 04:57:35,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2020-12-09 04:57:35,745 INFO L87 Difference]: Start difference. First operand 70 states and 119 transitions. Second operand 30 states. [2020-12-09 04:57:36,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:57:36,498 INFO L93 Difference]: Finished difference Result 189 states and 418 transitions. [2020-12-09 04:57:36,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-09 04:57:36,499 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 1059 [2020-12-09 04:57:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:57:36,501 INFO L225 Difference]: With dead ends: 189 [2020-12-09 04:57:36,501 INFO L226 Difference]: Without dead ends: 124 [2020-12-09 04:57:36,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2177 GetRequests, 2112 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=841, Invalid=2941, Unknown=0, NotChecked=0, Total=3782 [2020-12-09 04:57:36,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-09 04:57:36,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2020-12-09 04:57:36,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-09 04:57:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 156 transitions. [2020-12-09 04:57:36,513 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 156 transitions. Word has length 1059 [2020-12-09 04:57:36,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:57:36,514 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 156 transitions. [2020-12-09 04:57:36,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-09 04:57:36,515 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 156 transitions. [2020-12-09 04:57:36,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2020-12-09 04:57:36,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:57:36,520 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 103, 63, 63, 63, 63, 63, 63, 63, 40, 24, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:57:36,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:57:36,721 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:57:36,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:57:36,723 INFO L82 PathProgramCache]: Analyzing trace with hash 875522296, now seen corresponding path program 6 times [2020-12-09 04:57:36,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:57:36,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707899488] [2020-12-09 04:57:36,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:57:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:57:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 45069 backedges. 3197 proven. 6335 refuted. 0 times theorem prover too weak. 35537 trivial. 0 not checked. [2020-12-09 04:57:37,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707899488] [2020-12-09 04:57:37,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15363124] [2020-12-09 04:57:37,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:57:37,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 04:57:37,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 04:57:37,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1544 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-09 04:57:37,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:57:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 45069 backedges. 3745 proven. 6780 refuted. 0 times theorem prover too weak. 34544 trivial. 0 not checked. [2020-12-09 04:57:38,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:57:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 45069 backedges. 3745 proven. 6927 refuted. 0 times theorem prover too weak. 34397 trivial. 0 not checked. [2020-12-09 04:57:44,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1512477558] [2020-12-09 04:57:44,065 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-12-09 04:57:44,065 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:57:44,065 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 04:57:44,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:57:44,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 35] total 40 [2020-12-09 04:57:44,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263495071] [2020-12-09 04:57:44,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-09 04:57:44,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:57:44,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-09 04:57:44,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2020-12-09 04:57:44,069 INFO L87 Difference]: Start difference. First operand 113 states and 156 transitions. Second operand 40 states. [2020-12-09 04:57:45,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:57:45,245 INFO L93 Difference]: Finished difference Result 261 states and 475 transitions. [2020-12-09 04:57:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-09 04:57:45,246 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 869 [2020-12-09 04:57:45,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:57:45,250 INFO L225 Difference]: With dead ends: 261 [2020-12-09 04:57:45,250 INFO L226 Difference]: Without dead ends: 153 [2020-12-09 04:57:45,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1805 GetRequests, 1729 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1360, Invalid=4340, Unknown=0, NotChecked=0, Total=5700 [2020-12-09 04:57:45,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-09 04:57:45,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 126. [2020-12-09 04:57:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-09 04:57:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 182 transitions. [2020-12-09 04:57:45,270 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 182 transitions. Word has length 869 [2020-12-09 04:57:45,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:57:45,271 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 182 transitions. [2020-12-09 04:57:45,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-09 04:57:45,271 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 182 transitions. [2020-12-09 04:57:45,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 747 [2020-12-09 04:57:45,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:57:45,277 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:57:45,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:57:45,479 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:57:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:57:45,480 INFO L82 PathProgramCache]: Analyzing trace with hash -600231419, now seen corresponding path program 7 times [2020-12-09 04:57:45,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:57:45,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632400508] [2020-12-09 04:57:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:57:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:57:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 2756 proven. 10117 refuted. 0 times theorem prover too weak. 20223 trivial. 0 not checked. [2020-12-09 04:57:46,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632400508] [2020-12-09 04:57:46,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975966888] [2020-12-09 04:57:46,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:57:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:57:46,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 220 conjunts are in the unsatisfiable core [2020-12-09 04:57:46,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:57:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-12-09 04:57:47,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:57:48,758 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:57:48,887 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:57:49,027 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:57:49,151 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:57:49,958 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-12-09 04:57:50,242 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-12-09 04:57:50,528 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-12-09 04:57:50,821 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-12-09 04:57:51,763 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:57:51,893 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:57:52,029 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:57:52,164 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:57:52,903 WARN L197 SmtUtils]: Spent 733.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-12-09 04:57:53,597 WARN L197 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-12-09 04:57:54,276 WARN L197 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-12-09 04:57:55,018 WARN L197 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-12-09 04:57:55,952 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:57:56,073 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:57:56,195 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:57:56,325 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:57:57,146 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-12-09 04:57:57,422 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-12-09 04:57:57,727 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-12-09 04:57:58,018 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-12-09 04:57:59,865 WARN L197 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 491 [2020-12-09 04:58:01,698 WARN L197 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 491 [2020-12-09 04:58:03,559 WARN L197 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 493 [2020-12-09 04:58:05,409 WARN L197 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 493 [2020-12-09 04:58:06,756 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:58:06,881 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:58:07,025 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:58:07,160 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:58:08,152 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-12-09 04:58:08,493 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-12-09 04:58:08,836 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-12-09 04:58:09,168 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-12-09 04:58:11,803 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:58:11,931 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:58:12,065 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:58:12,195 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:58:15,464 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:58:15,600 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:58:15,749 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:58:15,897 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:58:16,928 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-12-09 04:58:17,272 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-12-09 04:58:17,658 WARN L197 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-12-09 04:58:17,972 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-12-09 04:58:19,101 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:58:19,249 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:58:19,400 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:58:19,555 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:58:20,339 WARN L197 SmtUtils]: Spent 778.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-12-09 04:58:21,133 WARN L197 SmtUtils]: Spent 790.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-12-09 04:58:21,927 WARN L197 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-12-09 04:58:22,726 WARN L197 SmtUtils]: Spent 795.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-12-09 04:58:24,115 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:58:24,254 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:58:24,415 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:58:24,576 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:58:28,215 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:58:28,373 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:58:28,530 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:58:28,683 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:58:29,826 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-12-09 04:58:30,160 WARN L197 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-12-09 04:58:30,508 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-12-09 04:58:30,895 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-12-09 04:58:33,790 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:58:33,963 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 04:58:34,112 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:58:34,259 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-09 04:58:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-12-09 04:58:37,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1168508529] [2020-12-09 04:58:37,127 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-12-09 04:58:37,128 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:58:37,128 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 04:58:37,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:58:37,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 41 [2020-12-09 04:58:37,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027896734] [2020-12-09 04:58:37,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-09 04:58:37,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:58:37,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-09 04:58:37,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2020-12-09 04:58:37,131 INFO L87 Difference]: Start difference. First operand 126 states and 182 transitions. Second operand 41 states. [2020-12-09 04:58:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:58:37,440 INFO L93 Difference]: Finished difference Result 127 states and 183 transitions. [2020-12-09 04:58:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-09 04:58:37,441 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 746 [2020-12-09 04:58:37,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:58:37,443 INFO L225 Difference]: With dead ends: 127 [2020-12-09 04:58:37,443 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 04:58:37,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1714 GetRequests, 1672 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2020-12-09 04:58:37,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 04:58:37,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 04:58:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 04:58:37,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 04:58:37,444 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 746 [2020-12-09 04:58:37,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:58:37,445 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 04:58:37,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-09 04:58:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 04:58:37,445 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 04:58:37,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-09 04:58:37,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 04:58:38,337 WARN L197 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 52 [2020-12-09 04:58:38,457 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 8 [2020-12-09 04:58:38,472 INFO L262 CegarLoopResult]: For program point fibonacciFINAL(lines 16 24) no Hoare annotation was computed. [2020-12-09 04:58:38,473 INFO L265 CegarLoopResult]: At program point fibonacciENTRY(lines 16 24) the Hoare annotation is: true [2020-12-09 04:58:38,473 INFO L258 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-12-09 04:58:38,473 INFO L262 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-12-09 04:58:38,473 INFO L258 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse9 (<= 4 |fibonacci_#in~n|)) (.cse10 (<= |fibonacci_#in~n| 4)) (.cse8 (<= 5 |fibonacci_#in~n|)) (.cse11 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse3 (<= fibonacci_~n |fibonacci_#in~n|))) (let ((.cse1 (and .cse11 (<= 8 |fibonacci_#in~n|) (<= 21 |fibonacci_#t~ret7|) .cse3)) (.cse4 (and (<= 8 |fibonacci_#t~ret7|) (<= 7 fibonacci_~n) (<= |fibonacci_#in~n| 7) .cse3)) (.cse5 (and .cse8 .cse11 (<= 3 |fibonacci_#t~ret7|) (<= |fibonacci_#in~n| 5) .cse3)) (.cse6 (and .cse11 (<= 5 |fibonacci_#t~ret7|) (<= |fibonacci_#in~n| 6) (<= 6 |fibonacci_#in~n|) .cse3)) (.cse7 (and (<= 13 |fibonacci_#t~ret7|) .cse11 (<= |fibonacci_#in~n| 8) (<= 7 |fibonacci_#in~n|) .cse3)) (.cse0 (and .cse9 .cse11 (<= 2 |fibonacci_#t~ret7|) .cse10 .cse3))) (and (let ((.cse2 (= |fibonacci_#t~ret7| 1))) (or .cse0 .cse1 (and (<= 3 fibonacci_~n) .cse2 .cse3) .cse4 (and (<= |fibonacci_#in~n| 2) .cse2 (< 1 fibonacci_~n) .cse3) .cse5 .cse6 .cse7)) (or (not .cse8) .cse1 .cse4 .cse5 .cse6 .cse7) (or (not .cse9) .cse0 (not .cse10))))) [2020-12-09 04:58:38,473 INFO L262 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-12-09 04:58:38,473 INFO L262 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-12-09 04:58:38,473 INFO L262 CegarLoopResult]: For program point fibonacciEXIT(lines 16 24) no Hoare annotation was computed. [2020-12-09 04:58:38,473 INFO L262 CegarLoopResult]: For program point L17(lines 17 23) no Hoare annotation was computed. [2020-12-09 04:58:38,473 INFO L262 CegarLoopResult]: For program point L33(lines 33 37) no Hoare annotation was computed. [2020-12-09 04:58:38,474 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 04:58:38,474 INFO L265 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: true [2020-12-09 04:58:38,474 INFO L262 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-12-09 04:58:38,474 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 04:58:38,474 INFO L262 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-12-09 04:58:38,474 INFO L265 CegarLoopResult]: At program point L27(lines 27 38) the Hoare annotation is: true [2020-12-09 04:58:38,474 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 36) no Hoare annotation was computed. [2020-12-09 04:58:38,474 INFO L262 CegarLoopResult]: For program point L36(line 36) no Hoare annotation was computed. [2020-12-09 04:58:38,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:58:38 BoogieIcfgContainer [2020-12-09 04:58:38,479 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:58:38,480 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:58:38,480 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:58:38,480 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:58:38,480 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:57:19" (3/4) ... [2020-12-09 04:58:38,482 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 04:58:38,485 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2020-12-09 04:58:38,488 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-09 04:58:38,488 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 04:58:38,488 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 04:58:38,488 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 04:58:38,509 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f61c31d6-0573-4127-b03d-5f86f2459941/bin/utaipan/witness.graphml [2020-12-09 04:58:38,509 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:58:38,510 INFO L168 Benchmark]: Toolchain (without parser) took 79070.82 ms. Allocated memory was 117.4 MB in the beginning and 935.3 MB in the end (delta: 817.9 MB). Free memory was 81.2 MB in the beginning and 795.0 MB in the end (delta: -713.8 MB). Peak memory consumption was 105.8 MB. Max. memory is 16.1 GB. [2020-12-09 04:58:38,510 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 117.4 MB. Free memory is still 97.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:58:38,510 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.59 ms. Allocated memory is still 117.4 MB. Free memory was 81.0 MB in the beginning and 94.8 MB in the end (delta: -13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 04:58:38,510 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.29 ms. Allocated memory is still 117.4 MB. Free memory was 94.8 MB in the beginning and 93.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:58:38,511 INFO L168 Benchmark]: Boogie Preprocessor took 11.84 ms. Allocated memory is still 117.4 MB. Free memory was 93.7 MB in the beginning and 92.7 MB in the end (delta: 988.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:58:38,511 INFO L168 Benchmark]: RCFGBuilder took 205.69 ms. Allocated memory is still 117.4 MB. Free memory was 92.7 MB in the beginning and 79.1 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 04:58:38,511 INFO L168 Benchmark]: TraceAbstraction took 78637.38 ms. Allocated memory was 117.4 MB in the beginning and 935.3 MB in the end (delta: 817.9 MB). Free memory was 78.5 MB in the beginning and 797.1 MB in the end (delta: -718.6 MB). Peak memory consumption was 580.0 MB. Max. memory is 16.1 GB. [2020-12-09 04:58:38,512 INFO L168 Benchmark]: Witness Printer took 29.49 ms. Allocated memory is still 935.3 MB. Free memory was 797.1 MB in the beginning and 795.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 04:58:38,513 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 117.4 MB. Free memory is still 97.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 155.59 ms. Allocated memory is still 117.4 MB. Free memory was 81.0 MB in the beginning and 94.8 MB in the end (delta: -13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.29 ms. Allocated memory is still 117.4 MB. Free memory was 94.8 MB in the beginning and 93.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 11.84 ms. Allocated memory is still 117.4 MB. Free memory was 93.7 MB in the beginning and 92.7 MB in the end (delta: 988.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 205.69 ms. Allocated memory is still 117.4 MB. Free memory was 92.7 MB in the beginning and 79.1 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 78637.38 ms. Allocated memory was 117.4 MB in the beginning and 935.3 MB in the end (delta: 817.9 MB). Free memory was 78.5 MB in the beginning and 797.1 MB in the end (delta: -718.6 MB). Peak memory consumption was 580.0 MB. Max. memory is 16.1 GB. * Witness Printer took 29.49 ms. Allocated memory is still 935.3 MB. Free memory was 797.1 MB in the beginning and 795.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 77.7s, OverallIterations: 10, TraceHistogramMax: 155, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 217 SDtfs, 1485 SDslu, 1156 SDs, 0 SdLazy, 2393 SolverSat, 2391 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8244 GetRequests, 7940 SyntacticMatches, 11 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3019 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=126occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 46 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 191 PreInvPairs, 293 NumberOfFragments, 232 HoareAnnotationTreeSize, 191 FomulaSimplifications, 749 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 5 FomulaSimplificationsInter, 2235 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 68.7s InterpolantComputationTime, 7809 NumberOfCodeBlocks, 6786 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 11677 ConstructedInterpolants, 0 QuantifiedInterpolants, 13325817 SizeOfPredicates, 55 NumberOfNonLiveVariables, 6487 ConjunctsInSsa, 324 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 499362/564156 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...