./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7a7b79fb8a331a00295fb9ddfb653e17bda3c30d ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:02:12,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:02:12,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:02:12,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:02:12,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:02:12,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:02:12,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:02:12,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:02:12,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:02:12,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:02:12,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:02:12,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:02:12,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:02:12,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:02:12,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:02:12,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:02:12,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:02:12,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:02:12,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:02:12,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:02:12,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:02:12,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:02:12,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:02:12,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:02:12,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:02:12,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:02:12,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:02:12,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:02:12,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:02:12,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:02:12,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:02:12,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:02:12,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:02:12,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:02:12,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:02:12,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:02:12,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:02:12,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:02:12,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:02:12,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:02:12,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:02:12,786 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:02:12,801 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:02:12,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:02:12,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:02:12,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:02:12,806 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:02:12,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:02:12,806 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:02:12,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:02:12,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:02:12,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:02:12,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:02:12,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:02:12,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:02:12,807 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:02:12,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:02:12,808 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:02:12,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:02:12,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:02:12,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:02:12,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:02:12,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:02:12,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:02:12,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:02:12,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:02:12,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:02:12,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:02:12,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:02:12,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:02:12,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer 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 -> 7a7b79fb8a331a00295fb9ddfb653e17bda3c30d [2019-10-22 09:02:12,848 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:02:12,857 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:02:12,860 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:02:12,862 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:02:12,862 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:02:12,863 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2019-10-22 09:02:12,914 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/data/41e4ad147/3461358ef0ed496cbcc2540dc5ffdeb4/FLAG178be7fd6 [2019-10-22 09:02:13,285 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:02:13,285 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2019-10-22 09:02:13,291 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/data/41e4ad147/3461358ef0ed496cbcc2540dc5ffdeb4/FLAG178be7fd6 [2019-10-22 09:02:13,303 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/data/41e4ad147/3461358ef0ed496cbcc2540dc5ffdeb4 [2019-10-22 09:02:13,305 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:02:13,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:02:13,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:02:13,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:02:13,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:02:13,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:02:13" (1/1) ... [2019-10-22 09:02:13,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70838e59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:13, skipping insertion in model container [2019-10-22 09:02:13,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:02:13" (1/1) ... [2019-10-22 09:02:13,322 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:02:13,338 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:02:13,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:02:13,466 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:02:13,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:02:13,560 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:02:13,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:13 WrapperNode [2019-10-22 09:02:13,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:02:13,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:02:13,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:02:13,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:02:13,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:13" (1/1) ... [2019-10-22 09:02:13,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:13" (1/1) ... [2019-10-22 09:02:13,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:02:13,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:02:13,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:02:13,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:02:13,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:13" (1/1) ... [2019-10-22 09:02:13,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:13" (1/1) ... [2019-10-22 09:02:13,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:13" (1/1) ... [2019-10-22 09:02:13,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:13" (1/1) ... [2019-10-22 09:02:13,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:13" (1/1) ... [2019-10-22 09:02:13,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:13" (1/1) ... [2019-10-22 09:02:13,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:13" (1/1) ... [2019-10-22 09:02:13,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:02:13,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:02:13,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:02:13,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:02:13,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:02:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:02:13,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:02:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-10-22 09:02:13,675 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-10-22 09:02:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-10-22 09:02:13,675 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-10-22 09:02:13,941 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:02:13,941 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 09:02:13,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:13 BoogieIcfgContainer [2019-10-22 09:02:13,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:02:13,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:02:13,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:02:13,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:02:13,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:02:13" (1/3) ... [2019-10-22 09:02:13,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42231e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:02:13, skipping insertion in model container [2019-10-22 09:02:13,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:13" (2/3) ... [2019-10-22 09:02:13,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42231e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:02:13, skipping insertion in model container [2019-10-22 09:02:13,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:13" (3/3) ... [2019-10-22 09:02:13,952 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2019-10-22 09:02:13,962 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:02:13,969 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:02:13,980 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:02:14,004 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:02:14,004 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:02:14,005 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:02:14,005 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:02:14,005 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:02:14,005 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:02:14,005 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:02:14,005 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:02:14,029 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-22 09:02:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 09:02:14,035 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:14,035 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:14,037 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:14,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-10-22 09:02:14,051 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:14,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68459502] [2019-10-22 09:02:14,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:14,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:14,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:14,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68459502] [2019-10-22 09:02:14,232 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:14,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 09:02:14,233 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847382160] [2019-10-22 09:02:14,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:02:14,237 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:14,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:02:14,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:02:14,252 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2019-10-22 09:02:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:14,356 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-10-22 09:02:14,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:02:14,358 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-10-22 09:02:14,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:14,368 INFO L225 Difference]: With dead ends: 38 [2019-10-22 09:02:14,368 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 09:02:14,371 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:02:14,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 09:02:14,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-22 09:02:14,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:02:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-10-22 09:02:14,412 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-10-22 09:02:14,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:14,413 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-10-22 09:02:14,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:02:14,413 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-10-22 09:02:14,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 09:02:14,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:14,415 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:14,416 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:14,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:14,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-10-22 09:02:14,416 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:14,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757448432] [2019-10-22 09:02:14,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:14,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:14,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:14,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757448432] [2019-10-22 09:02:14,478 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:14,478 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 09:02:14,478 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746695387] [2019-10-22 09:02:14,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:02:14,480 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:14,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:02:14,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:02:14,480 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2019-10-22 09:02:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:14,557 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-10-22 09:02:14,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:02:14,558 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-10-22 09:02:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:14,559 INFO L225 Difference]: With dead ends: 32 [2019-10-22 09:02:14,559 INFO L226 Difference]: Without dead ends: 28 [2019-10-22 09:02:14,560 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:02:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-22 09:02:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-10-22 09:02:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:02:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-10-22 09:02:14,567 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-10-22 09:02:14,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:14,568 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-10-22 09:02:14,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:02:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-10-22 09:02:14,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 09:02:14,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:14,569 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:14,569 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:14,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:14,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-10-22 09:02:14,570 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:14,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361169041] [2019-10-22 09:02:14,570 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:14,570 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:14,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:02:14,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361169041] [2019-10-22 09:02:14,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004330966] [2019-10-22 09:02:14,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:14,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:02:14,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:02:14,899 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:14,899 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-10-22 09:02:14,899 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167082449] [2019-10-22 09:02:14,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 09:02:14,900 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:14,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 09:02:14,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:02:14,901 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 12 states. [2019-10-22 09:02:15,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:15,070 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-10-22 09:02:15,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:02:15,070 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-10-22 09:02:15,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:15,071 INFO L225 Difference]: With dead ends: 59 [2019-10-22 09:02:15,072 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 09:02:15,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:02:15,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 09:02:15,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-22 09:02:15,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-22 09:02:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-10-22 09:02:15,092 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-10-22 09:02:15,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:15,092 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-10-22 09:02:15,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 09:02:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-10-22 09:02:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 09:02:15,094 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:15,094 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:15,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:15,295 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:15,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-10-22 09:02:15,296 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:15,296 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199331881] [2019-10-22 09:02:15,296 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:15,296 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:15,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:02:15,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199331881] [2019-10-22 09:02:15,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012798401] [2019-10-22 09:02:15,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/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 [2019-10-22 09:02:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:15,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:02:15,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:02:15,493 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:15,493 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-10-22 09:02:15,494 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910687419] [2019-10-22 09:02:15,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 09:02:15,495 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:15,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 09:02:15,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:02:15,496 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 12 states. [2019-10-22 09:02:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:15,747 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-10-22 09:02:15,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:02:15,748 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-10-22 09:02:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:15,751 INFO L225 Difference]: With dead ends: 55 [2019-10-22 09:02:15,751 INFO L226 Difference]: Without dead ends: 51 [2019-10-22 09:02:15,752 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:02:15,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-22 09:02:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-10-22 09:02:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-22 09:02:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-10-22 09:02:15,765 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-10-22 09:02:15,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:15,765 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-10-22 09:02:15,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 09:02:15,765 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-10-22 09:02:15,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-22 09:02:15,767 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:15,768 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:15,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:15,968 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:15,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:15,969 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-10-22 09:02:15,969 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:15,969 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087804147] [2019-10-22 09:02:15,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:15,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:15,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 09:02:16,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087804147] [2019-10-22 09:02:16,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771177390] [2019-10-22 09:02:16,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:02:16,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 09:02:16,277 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:16,277 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2019-10-22 09:02:16,277 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112947299] [2019-10-22 09:02:16,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 09:02:16,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:16,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 09:02:16,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:02:16,281 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 14 states. [2019-10-22 09:02:16,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:16,656 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-10-22 09:02:16,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 09:02:16,656 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2019-10-22 09:02:16,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:16,658 INFO L225 Difference]: With dead ends: 114 [2019-10-22 09:02:16,658 INFO L226 Difference]: Without dead ends: 68 [2019-10-22 09:02:16,659 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2019-10-22 09:02:16,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-22 09:02:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-10-22 09:02:16,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-22 09:02:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-10-22 09:02:16,672 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-10-22 09:02:16,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:16,673 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-10-22 09:02:16,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 09:02:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-10-22 09:02:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-22 09:02:16,675 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:16,675 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:16,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:16,876 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:16,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:16,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-10-22 09:02:16,876 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:16,877 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97851124] [2019-10-22 09:02:16,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:16,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:16,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 09:02:16,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97851124] [2019-10-22 09:02:16,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114280299] [2019-10-22 09:02:16,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/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 [2019-10-22 09:02:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:17,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:02:17,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 09:02:17,082 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:17,082 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-10-22 09:02:17,082 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221989430] [2019-10-22 09:02:17,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 09:02:17,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:17,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 09:02:17,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:02:17,084 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 14 states. [2019-10-22 09:02:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:17,347 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-10-22 09:02:17,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 09:02:17,348 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-10-22 09:02:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:17,350 INFO L225 Difference]: With dead ends: 147 [2019-10-22 09:02:17,350 INFO L226 Difference]: Without dead ends: 83 [2019-10-22 09:02:17,351 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2019-10-22 09:02:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-22 09:02:17,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-10-22 09:02:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-22 09:02:17,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-10-22 09:02:17,364 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-10-22 09:02:17,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:17,364 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-10-22 09:02:17,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 09:02:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-10-22 09:02:17,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-22 09:02:17,367 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:17,367 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:17,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:17,568 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:17,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:17,568 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-10-22 09:02:17,568 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:17,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988507964] [2019-10-22 09:02:17,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:17,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:17,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-22 09:02:17,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988507964] [2019-10-22 09:02:17,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778893501] [2019-10-22 09:02:17,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:17,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:02:17,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-22 09:02:17,869 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:17,869 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2019-10-22 09:02:17,869 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906207002] [2019-10-22 09:02:17,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 09:02:17,870 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:17,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 09:02:17,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:02:17,870 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 17 states. [2019-10-22 09:02:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:18,153 INFO L93 Difference]: Finished difference Result 163 states and 263 transitions. [2019-10-22 09:02:18,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 09:02:18,154 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2019-10-22 09:02:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:18,156 INFO L225 Difference]: With dead ends: 163 [2019-10-22 09:02:18,156 INFO L226 Difference]: Without dead ends: 99 [2019-10-22 09:02:18,157 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2019-10-22 09:02:18,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-22 09:02:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2019-10-22 09:02:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-22 09:02:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 143 transitions. [2019-10-22 09:02:18,175 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 143 transitions. Word has length 50 [2019-10-22 09:02:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:18,175 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 143 transitions. [2019-10-22 09:02:18,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 09:02:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 143 transitions. [2019-10-22 09:02:18,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-22 09:02:18,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:18,179 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:18,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:18,380 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:18,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:18,381 INFO L82 PathProgramCache]: Analyzing trace with hash -751947822, now seen corresponding path program 1 times [2019-10-22 09:02:18,381 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:18,381 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099940730] [2019-10-22 09:02:18,381 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:18,381 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:18,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-22 09:02:18,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099940730] [2019-10-22 09:02:18,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133444196] [2019-10-22 09:02:18,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/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 [2019-10-22 09:02:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:18,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:02:18,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-22 09:02:18,619 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:18,619 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2019-10-22 09:02:18,619 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065312240] [2019-10-22 09:02:18,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 09:02:18,620 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:18,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 09:02:18,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:02:18,620 INFO L87 Difference]: Start difference. First operand 91 states and 143 transitions. Second operand 15 states. [2019-10-22 09:02:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:18,894 INFO L93 Difference]: Finished difference Result 182 states and 293 transitions. [2019-10-22 09:02:18,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 09:02:18,895 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-10-22 09:02:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:18,896 INFO L225 Difference]: With dead ends: 182 [2019-10-22 09:02:18,896 INFO L226 Difference]: Without dead ends: 91 [2019-10-22 09:02:18,897 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-10-22 09:02:18,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-22 09:02:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2019-10-22 09:02:18,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-22 09:02:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 123 transitions. [2019-10-22 09:02:18,918 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 123 transitions. Word has length 51 [2019-10-22 09:02:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:18,919 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 123 transitions. [2019-10-22 09:02:18,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 09:02:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 123 transitions. [2019-10-22 09:02:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-22 09:02:18,921 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:18,921 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:19,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:19,122 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:19,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:19,122 INFO L82 PathProgramCache]: Analyzing trace with hash 629760405, now seen corresponding path program 2 times [2019-10-22 09:02:19,123 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:19,123 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934055263] [2019-10-22 09:02:19,123 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:19,123 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:19,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 31 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-22 09:02:19,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934055263] [2019-10-22 09:02:19,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825330430] [2019-10-22 09:02:19,376 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:19,415 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:02:19,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:02:19,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 09:02:19,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 17 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-22 09:02:19,514 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:19,514 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 22 [2019-10-22 09:02:19,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677257415] [2019-10-22 09:02:19,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-22 09:02:19,516 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:19,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-22 09:02:19,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-22 09:02:19,517 INFO L87 Difference]: Start difference. First operand 83 states and 123 transitions. Second operand 22 states. [2019-10-22 09:02:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:19,900 INFO L93 Difference]: Finished difference Result 189 states and 316 transitions. [2019-10-22 09:02:19,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-22 09:02:19,901 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2019-10-22 09:02:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:19,902 INFO L225 Difference]: With dead ends: 189 [2019-10-22 09:02:19,903 INFO L226 Difference]: Without dead ends: 100 [2019-10-22 09:02:19,904 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2019-10-22 09:02:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-22 09:02:19,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 87. [2019-10-22 09:02:19,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-22 09:02:19,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2019-10-22 09:02:19,927 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 78 [2019-10-22 09:02:19,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:19,927 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2019-10-22 09:02:19,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-22 09:02:19,927 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2019-10-22 09:02:19,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-22 09:02:19,928 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:19,928 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:20,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:20,131 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:20,131 INFO L82 PathProgramCache]: Analyzing trace with hash -26046796, now seen corresponding path program 1 times [2019-10-22 09:02:20,132 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:20,132 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863119966] [2019-10-22 09:02:20,132 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:20,132 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:20,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:20,170 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:20,170 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 09:02:20,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:02:20 BoogieIcfgContainer [2019-10-22 09:02:20,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:02:20,198 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:02:20,198 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:02:20,198 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:02:20,199 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:13" (3/4) ... [2019-10-22 09:02:20,200 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 09:02:20,269 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_eb3b1cb0-4bc6-4eab-bf98-8461b7e507cb/bin/uautomizer/witness.graphml [2019-10-22 09:02:20,270 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:02:20,272 INFO L168 Benchmark]: Toolchain (without parser) took 6964.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.0 MB). Free memory was 946.0 MB in the beginning and 953.0 MB in the end (delta: -7.0 MB). Peak memory consumption was 165.0 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:20,272 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:02:20,273 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -179.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:20,273 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.17 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:02:20,273 INFO L168 Benchmark]: Boogie Preprocessor took 17.06 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:02:20,273 INFO L168 Benchmark]: RCFGBuilder took 333.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:20,274 INFO L168 Benchmark]: TraceAbstraction took 6253.88 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 41.4 MB). Free memory was 1.1 GB in the beginning and 961.0 MB in the end (delta: 145.8 MB). Peak memory consumption was 187.2 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:20,274 INFO L168 Benchmark]: Witness Printer took 71.97 ms. Allocated memory is still 1.2 GB. Free memory was 961.0 MB in the beginning and 953.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:20,276 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 253.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -179.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.17 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.06 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 333.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6253.88 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 41.4 MB). Free memory was 1.1 GB in the beginning and 961.0 MB in the end (delta: 145.8 MB). Peak memory consumption was 187.2 MB. Max. memory is 11.5 GB. * Witness Printer took 71.97 ms. Allocated memory is still 1.2 GB. Free memory was 961.0 MB in the beginning and 953.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 4; [L37] CALL, EXPR fibo1(x) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 3 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: UNSAFE, OverallTime: 6.1s, OverallIterations: 10, TraceHistogramMax: 6, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 210 SDtfs, 383 SDslu, 1378 SDs, 0 SdLazy, 2102 SolverSat, 296 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 503 GetRequests, 366 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 55 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 673 NumberOfCodeBlocks, 673 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 593 ConstructedInterpolants, 0 QuantifiedInterpolants, 60425 SizeOfPredicates, 25 NumberOfNonLiveVariables, 676 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 378/526 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...