./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive/Fibonacci04_false-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04_false-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d3562c726fb0df5872bc6ae08c11ec0d40862c19 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 15:52:56,492 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 15:52:56,493 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 15:52:56,501 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 15:52:56,501 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 15:52:56,502 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 15:52:56,503 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 15:52:56,504 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 15:52:56,505 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 15:52:56,506 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 15:52:56,506 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 15:52:56,507 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 15:52:56,508 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 15:52:56,508 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 15:52:56,509 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 15:52:56,510 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 15:52:56,510 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 15:52:56,512 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 15:52:56,513 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 15:52:56,514 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 15:52:56,515 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 15:52:56,515 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 15:52:56,518 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 15:52:56,518 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 15:52:56,518 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 15:52:56,518 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 15:52:56,519 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 15:52:56,520 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 15:52:56,521 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 15:52:56,521 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 15:52:56,522 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 15:52:56,522 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 15:52:56,522 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 15:52:56,522 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 15:52:56,523 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 15:52:56,524 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 15:52:56,524 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 15:52:56,534 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 15:52:56,534 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 15:52:56,535 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 15:52:56,535 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 15:52:56,535 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 15:52:56,535 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 15:52:56,535 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 15:52:56,535 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 15:52:56,536 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 15:52:56,536 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 15:52:56,536 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 15:52:56,536 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 15:52:56,536 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 15:52:56,536 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 15:52:56,536 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 15:52:56,537 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 15:52:56,537 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 15:52:56,537 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 15:52:56,537 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 15:52:56,537 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 15:52:56,537 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 15:52:56,538 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 15:52:56,538 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 15:52:56,538 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 15:52:56,538 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 15:52:56,538 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 15:52:56,538 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 15:52:56,538 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 15:52:56,538 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 15:52:56,538 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:52:56,539 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 15:52:56,539 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 15:52:56,539 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 15:52:56,539 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 15:52:56,539 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 15:52:56,539 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 15:52:56,539 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 15:52:56,539 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3562c726fb0df5872bc6ae08c11ec0d40862c19 [2018-11-18 15:52:56,563 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 15:52:56,571 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 15:52:56,573 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 15:52:56,574 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 15:52:56,574 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 15:52:56,574 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/../../sv-benchmarks/c/recursive/Fibonacci04_false-unreach-call_true-no-overflow_true-termination.c [2018-11-18 15:52:56,608 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/data/fbf6b736a/17e90503d44a443f99252e3711ae7e66/FLAGed1351bc0 [2018-11-18 15:52:56,997 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 15:52:56,997 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/sv-benchmarks/c/recursive/Fibonacci04_false-unreach-call_true-no-overflow_true-termination.c [2018-11-18 15:52:57,001 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/data/fbf6b736a/17e90503d44a443f99252e3711ae7e66/FLAGed1351bc0 [2018-11-18 15:52:57,009 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/data/fbf6b736a/17e90503d44a443f99252e3711ae7e66 [2018-11-18 15:52:57,011 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 15:52:57,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 15:52:57,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 15:52:57,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 15:52:57,014 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 15:52:57,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:52:57" (1/1) ... [2018-11-18 15:52:57,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75654020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:52:57, skipping insertion in model container [2018-11-18 15:52:57,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:52:57" (1/1) ... [2018-11-18 15:52:57,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 15:52:57,036 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 15:52:57,133 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:52:57,135 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 15:52:57,146 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:52:57,155 INFO L195 MainTranslator]: Completed translation [2018-11-18 15:52:57,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:52:57 WrapperNode [2018-11-18 15:52:57,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 15:52:57,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 15:52:57,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 15:52:57,155 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 15:52:57,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:52:57" (1/1) ... [2018-11-18 15:52:57,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:52:57" (1/1) ... [2018-11-18 15:52:57,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 15:52:57,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 15:52:57,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 15:52:57,172 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 15:52:57,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:52:57" (1/1) ... [2018-11-18 15:52:57,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:52:57" (1/1) ... [2018-11-18 15:52:57,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:52:57" (1/1) ... [2018-11-18 15:52:57,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:52:57" (1/1) ... [2018-11-18 15:52:57,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:52:57" (1/1) ... [2018-11-18 15:52:57,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:52:57" (1/1) ... [2018-11-18 15:52:57,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:52:57" (1/1) ... [2018-11-18 15:52:57,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 15:52:57,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 15:52:57,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 15:52:57,183 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 15:52:57,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:52:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/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 [2018-11-18 15:52:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-18 15:52:57,263 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-18 15:52:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 15:52:57,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 15:52:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 15:52:57,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 15:52:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 15:52:57,263 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 15:52:57,376 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 15:52:57,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:52:57 BoogieIcfgContainer [2018-11-18 15:52:57,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 15:52:57,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 15:52:57,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 15:52:57,379 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 15:52:57,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 03:52:57" (1/3) ... [2018-11-18 15:52:57,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f4d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:52:57, skipping insertion in model container [2018-11-18 15:52:57,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:52:57" (2/3) ... [2018-11-18 15:52:57,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f4d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:52:57, skipping insertion in model container [2018-11-18 15:52:57,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:52:57" (3/3) ... [2018-11-18 15:52:57,382 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci04_false-unreach-call_true-no-overflow_true-termination.c [2018-11-18 15:52:57,390 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 15:52:57,395 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 15:52:57,407 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 15:52:57,432 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 15:52:57,433 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 15:52:57,433 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 15:52:57,433 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 15:52:57,433 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 15:52:57,433 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 15:52:57,433 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 15:52:57,433 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 15:52:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-11-18 15:52:57,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 15:52:57,452 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:52:57,452 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:52:57,454 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:52:57,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:52:57,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2018-11-18 15:52:57,459 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:52:57,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:52:57,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:52:57,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:52:57,496 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:52:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:52:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:52:57,576 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:52:57,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 15:52:57,576 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:52:57,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:52:57,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:52:57,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:52:57,588 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2018-11-18 15:52:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:52:57,666 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-18 15:52:57,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 15:52:57,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 15:52:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:52:57,674 INFO L225 Difference]: With dead ends: 35 [2018-11-18 15:52:57,674 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 15:52:57,676 INFO L604 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 [2018-11-18 15:52:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 15:52:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 15:52:57,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 15:52:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-18 15:52:57,702 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-18 15:52:57,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:52:57,702 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-18 15:52:57,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:52:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-18 15:52:57,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 15:52:57,704 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:52:57,704 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:52:57,704 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:52:57,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:52:57,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2018-11-18 15:52:57,704 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:52:57,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:52:57,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:52:57,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:52:57,706 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:52:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:52:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:52:57,751 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:52:57,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 15:52:57,751 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:52:57,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:52:57,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:52:57,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:52:57,753 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-18 15:52:57,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:52:57,819 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-18 15:52:57,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 15:52:57,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-18 15:52:57,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:52:57,820 INFO L225 Difference]: With dead ends: 27 [2018-11-18 15:52:57,820 INFO L226 Difference]: Without dead ends: 23 [2018-11-18 15:52:57,821 INFO L604 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 [2018-11-18 15:52:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-18 15:52:57,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-18 15:52:57,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 15:52:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-18 15:52:57,826 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-18 15:52:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:52:57,826 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-18 15:52:57,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:52:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-18 15:52:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 15:52:57,827 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:52:57,828 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:52:57,828 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:52:57,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:52:57,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2018-11-18 15:52:57,828 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:52:57,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:52:57,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:52:57,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:52:57,829 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:52:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:52:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 15:52:57,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:52:57,886 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:52:57,886 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-11-18 15:52:57,888 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [8], [10], [12], [13], [14], [18], [20], [24], [26], [29], [30], [31], [32], [33], [34], [35], [37], [38] [2018-11-18 15:52:57,914 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 15:52:57,915 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 15:52:58,108 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 15:52:58,109 INFO L272 AbstractInterpreter]: Visited 21 different actions 282 times. Never merged. Never widened. Performed 588 root evaluator evaluations with a maximum evaluation depth of 4. Performed 588 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 32 fixpoints after 3 different actions. Largest state had 5 variables. [2018-11-18 15:52:58,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:52:58,117 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 15:52:58,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:52:58,117 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:52:58,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:52:58,124 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 15:52:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:52:58,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:52:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 15:52:58,171 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:52:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 15:52:58,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:52:58,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2018-11-18 15:52:58,343 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:52:58,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 15:52:58,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 15:52:58,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:52:58,344 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-18 15:52:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:52:58,428 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-18 15:52:58,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 15:52:58,428 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-18 15:52:58,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:52:58,429 INFO L225 Difference]: With dead ends: 38 [2018-11-18 15:52:58,429 INFO L226 Difference]: Without dead ends: 23 [2018-11-18 15:52:58,430 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-11-18 15:52:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-18 15:52:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-18 15:52:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 15:52:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-18 15:52:58,434 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-18 15:52:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:52:58,435 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-18 15:52:58,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 15:52:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-18 15:52:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 15:52:58,436 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:52:58,436 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:52:58,437 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:52:58,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:52:58,437 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2018-11-18 15:52:58,437 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:52:58,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:52:58,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:52:58,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:52:58,438 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:52:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:52:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 15:52:58,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:52:58,473 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:52:58,473 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-11-18 15:52:58,473 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [8], [10], [12], [13], [14], [18], [20], [24], [26], [29], [30], [31], [32], [33], [34], [35], [37], [38] [2018-11-18 15:52:58,475 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 15:52:58,475 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 15:52:59,544 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 15:52:59,544 INFO L272 AbstractInterpreter]: Visited 22 different actions 4111 times. Merged at 10 different actions 1344 times. Never widened. Performed 10008 root evaluator evaluations with a maximum evaluation depth of 4. Performed 10008 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 592 fixpoints after 6 different actions. Largest state had 5 variables. [2018-11-18 15:52:59,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:52:59,546 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 15:52:59,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:52:59,547 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:52:59,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:52:59,557 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 15:52:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:52:59,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:52:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 15:52:59,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:52:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 15:52:59,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:52:59,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2018-11-18 15:52:59,745 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:52:59,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 15:52:59,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 15:52:59,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-18 15:52:59,746 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-18 15:52:59,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:52:59,783 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-18 15:52:59,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 15:52:59,784 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-18 15:52:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:52:59,784 INFO L225 Difference]: With dead ends: 32 [2018-11-18 15:52:59,785 INFO L226 Difference]: Without dead ends: 28 [2018-11-18 15:52:59,785 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:52:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-18 15:52:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-18 15:52:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 15:52:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-18 15:52:59,789 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-18 15:52:59,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:52:59,789 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-18 15:52:59,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 15:52:59,789 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-18 15:52:59,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-18 15:52:59,790 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:52:59,790 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:52:59,790 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:52:59,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:52:59,790 INFO L82 PathProgramCache]: Analyzing trace with hash -111055954, now seen corresponding path program 2 times [2018-11-18 15:52:59,790 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:52:59,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:52:59,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:52:59,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:52:59,791 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:52:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:52:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 15:52:59,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:52:59,864 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:52:59,864 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 15:52:59,864 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 15:52:59,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:52:59,864 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:52:59,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:52:59,875 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 15:52:59,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 15:52:59,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:52:59,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:52:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 15:52:59,892 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:53:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-18 15:53:00,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:53:00,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2018-11-18 15:53:00,025 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:53:00,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 15:53:00,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 15:53:00,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-18 15:53:00,026 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 6 states. [2018-11-18 15:53:00,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:53:00,054 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2018-11-18 15:53:00,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 15:53:00,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2018-11-18 15:53:00,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:53:00,055 INFO L225 Difference]: With dead ends: 38 [2018-11-18 15:53:00,055 INFO L226 Difference]: Without dead ends: 34 [2018-11-18 15:53:00,056 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:53:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-18 15:53:00,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2018-11-18 15:53:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 15:53:00,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-18 15:53:00,060 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 40 [2018-11-18 15:53:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:53:00,060 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-18 15:53:00,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 15:53:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-18 15:53:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 15:53:00,061 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:53:00,061 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:53:00,061 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:53:00,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:53:00,061 INFO L82 PathProgramCache]: Analyzing trace with hash 380905728, now seen corresponding path program 3 times [2018-11-18 15:53:00,062 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:53:00,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:53:00,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:53:00,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:53:00,062 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:53:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:53:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-18 15:53:00,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:53:00,102 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:53:00,102 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 15:53:00,102 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 15:53:00,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:53:00,103 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:53:00,111 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 15:53:00,111 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 15:53:00,121 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 15:53:00,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:53:00,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:53:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-18 15:53:00,136 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:53:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-18 15:53:00,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:53:00,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 12 [2018-11-18 15:53:00,346 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:53:00,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 15:53:00,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 15:53:00,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:53:00,346 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 7 states. [2018-11-18 15:53:00,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:53:00,393 INFO L93 Difference]: Finished difference Result 40 states and 59 transitions. [2018-11-18 15:53:00,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 15:53:00,393 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2018-11-18 15:53:00,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:53:00,394 INFO L225 Difference]: With dead ends: 40 [2018-11-18 15:53:00,394 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 15:53:00,394 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2018-11-18 15:53:00,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 15:53:00,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-18 15:53:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 15:53:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-18 15:53:00,400 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 41 [2018-11-18 15:53:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:53:00,400 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-18 15:53:00,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 15:53:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-18 15:53:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-18 15:53:00,401 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:53:00,402 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:53:00,402 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:53:00,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:53:00,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1559307686, now seen corresponding path program 4 times [2018-11-18 15:53:00,402 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:53:00,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:53:00,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:53:00,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:53:00,403 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:53:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:53:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 47 proven. 43 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-11-18 15:53:00,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:53:00,480 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:53:00,480 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 15:53:00,480 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 15:53:00,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:53:00,480 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:53:00,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:53:00,486 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 15:53:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:53:00,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:53:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 84 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-18 15:53:00,534 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:53:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 99 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-18 15:53:00,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:53:00,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 18 [2018-11-18 15:53:00,841 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:53:00,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 15:53:00,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 15:53:00,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2018-11-18 15:53:00,843 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 14 states. [2018-11-18 15:53:01,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:53:01,087 INFO L93 Difference]: Finished difference Result 79 states and 134 transitions. [2018-11-18 15:53:01,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 15:53:01,087 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-18 15:53:01,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:53:01,089 INFO L225 Difference]: With dead ends: 79 [2018-11-18 15:53:01,089 INFO L226 Difference]: Without dead ends: 50 [2018-11-18 15:53:01,090 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=265, Invalid=665, Unknown=0, NotChecked=0, Total=930 [2018-11-18 15:53:01,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-18 15:53:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2018-11-18 15:53:01,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 15:53:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2018-11-18 15:53:01,097 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 67 [2018-11-18 15:53:01,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:53:01,097 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2018-11-18 15:53:01,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 15:53:01,097 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2018-11-18 15:53:01,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-18 15:53:01,099 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:53:01,099 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:53:01,099 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:53:01,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:53:01,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1110256604, now seen corresponding path program 5 times [2018-11-18 15:53:01,100 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:53:01,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:53:01,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:53:01,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:53:01,101 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:53:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:53:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 319 proven. 55 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2018-11-18 15:53:01,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:53:01,207 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:53:01,207 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 15:53:01,207 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 15:53:01,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:53:01,207 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:53:01,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:53:01,219 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 15:53:01,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-18 15:53:01,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:53:01,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:53:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 393 proven. 34 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-18 15:53:01,274 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:53:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 393 proven. 41 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-11-18 15:53:01,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:53:01,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 18 [2018-11-18 15:53:01,643 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:53:01,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 15:53:01,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 15:53:01,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-11-18 15:53:01,644 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand 14 states. [2018-11-18 15:53:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:53:01,801 INFO L93 Difference]: Finished difference Result 112 states and 167 transitions. [2018-11-18 15:53:01,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 15:53:01,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 150 [2018-11-18 15:53:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:53:01,803 INFO L225 Difference]: With dead ends: 112 [2018-11-18 15:53:01,803 INFO L226 Difference]: Without dead ends: 65 [2018-11-18 15:53:01,806 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 285 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2018-11-18 15:53:01,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-11-18 15:53:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2018-11-18 15:53:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-18 15:53:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2018-11-18 15:53:01,812 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 150 [2018-11-18 15:53:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:53:01,813 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2018-11-18 15:53:01,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 15:53:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2018-11-18 15:53:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-18 15:53:01,814 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:53:01,815 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:53:01,815 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:53:01,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:53:01,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1066463687, now seen corresponding path program 6 times [2018-11-18 15:53:01,815 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:53:01,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:53:01,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:53:01,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:53:01,816 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:53:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:53:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 241 proven. 102 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2018-11-18 15:53:01,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:53:01,925 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:53:01,925 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 15:53:01,926 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 15:53:01,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:53:01,926 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:53:01,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 15:53:01,937 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 15:53:01,956 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 15:53:01,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:53:01,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:53:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 243 proven. 97 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2018-11-18 15:53:02,004 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:53:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 240 proven. 112 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2018-11-18 15:53:02,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:53:02,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 12] total 17 [2018-11-18 15:53:02,383 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:53:02,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 15:53:02,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 15:53:02,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2018-11-18 15:53:02,384 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 12 states. [2018-11-18 15:53:02,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:53:02,452 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2018-11-18 15:53:02,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 15:53:02,453 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 136 [2018-11-18 15:53:02,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:53:02,454 INFO L225 Difference]: With dead ends: 71 [2018-11-18 15:53:02,454 INFO L226 Difference]: Without dead ends: 62 [2018-11-18 15:53:02,454 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 259 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2018-11-18 15:53:02,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-18 15:53:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-11-18 15:53:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-18 15:53:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2018-11-18 15:53:02,458 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 136 [2018-11-18 15:53:02,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:53:02,459 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2018-11-18 15:53:02,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 15:53:02,459 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2018-11-18 15:53:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-18 15:53:02,460 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:53:02,460 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:53:02,460 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:53:02,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:53:02,460 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 7 times [2018-11-18 15:53:02,460 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:53:02,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:53:02,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:53:02,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:53:02,461 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:53:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:53:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:53:02,491 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 15:53:02,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 03:53:02 BoogieIcfgContainer [2018-11-18 15:53:02,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 15:53:02,515 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 15:53:02,515 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 15:53:02,515 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 15:53:02,516 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:52:57" (3/4) ... [2018-11-18 15:53:02,517 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 15:53:02,551 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_025abda5-7de1-45d2-8cd0-d4fa2c965cf6/bin-2019/utaipan/witness.graphml [2018-11-18 15:53:02,551 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 15:53:02,552 INFO L168 Benchmark]: Toolchain (without parser) took 5540.63 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 353.4 MB). Free memory was 962.3 MB in the beginning and 1.2 GB in the end (delta: -277.0 MB). Peak memory consumption was 76.4 MB. Max. memory is 11.5 GB. [2018-11-18 15:53:02,553 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 982.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:53:02,553 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.12 ms. Allocated memory is still 1.0 GB. Free memory was 962.3 MB in the beginning and 951.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:53:02,553 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.04 ms. Allocated memory is still 1.0 GB. Free memory is still 951.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:53:02,553 INFO L168 Benchmark]: Boogie Preprocessor took 11.43 ms. Allocated memory is still 1.0 GB. Free memory was 951.6 MB in the beginning and 946.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 15:53:02,553 INFO L168 Benchmark]: RCFGBuilder took 193.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -196.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-18 15:53:02,554 INFO L168 Benchmark]: TraceAbstraction took 5137.31 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 190.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -96.4 MB). Peak memory consumption was 94.4 MB. Max. memory is 11.5 GB. [2018-11-18 15:53:02,554 INFO L168 Benchmark]: Witness Printer took 36.07 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:53:02,555 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 982.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 143.12 ms. Allocated memory is still 1.0 GB. Free memory was 962.3 MB in the beginning and 951.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.04 ms. Allocated memory is still 1.0 GB. Free memory is still 951.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.43 ms. Allocated memory is still 1.0 GB. Free memory was 951.6 MB in the beginning and 946.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 193.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -196.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5137.31 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 190.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -96.4 MB). Peak memory consumption was 94.4 MB. Max. memory is 11.5 GB. * Witness Printer took 36.07 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L28] int x = __VERIFIER_nondet_int(); [L29] CALL, EXPR fibonacci(x) VAL [\old(n)=5] [L17] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L19] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=4] [L17] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L19] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L22] EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L22] EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] RET return fibonacci(n-1) + fibonacci(n-2); [L22] EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L22] EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] RET return fibonacci(n-1) + fibonacci(n-2); [L22] EXPR fibonacci(n-1) VAL [\old(n)=4, fibonacci(n-1)=2, n=4] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L22] EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L22] EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] RET return fibonacci(n-1) + fibonacci(n-2); [L22] EXPR fibonacci(n-2) VAL [\old(n)=4, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L22] RET return fibonacci(n-1) + fibonacci(n-2); [L22] EXPR fibonacci(n-1) VAL [\old(n)=5, fibonacci(n-1)=3, n=5] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L22] EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L22] EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] RET return fibonacci(n-1) + fibonacci(n-2); [L22] EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L22] EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] RET return fibonacci(n-1) + fibonacci(n-2); [L22] EXPR fibonacci(n-2) VAL [\old(n)=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L22] RET return fibonacci(n-1) + fibonacci(n-2); [L29] EXPR fibonacci(x) VAL [fibonacci(x)=5, x=5] [L29] int result = fibonacci(x); [L30] COND FALSE !(x != 5 || result == 3) VAL [result=5, x=5] [L33] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. UNSAFE Result, 5.0s OverallTime, 10 OverallIterations, 21 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 169 SDtfs, 201 SDslu, 462 SDs, 0 SdLazy, 598 SolverSat, 202 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1079 GetRequests, 910 SyntacticMatches, 43 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.3s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 16 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 1110 NumberOfCodeBlocks, 1009 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1465 ConstructedInterpolants, 0 QuantifiedInterpolants, 248402 SizeOfPredicates, 35 NumberOfNonLiveVariables, 868 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 6391/7182 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...