./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/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 595c6555624af5bbcf79585a20acb2500e3eeee8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 05:43:46,604 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 05:43:46,606 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 05:43:46,614 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 05:43:46,614 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 05:43:46,615 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 05:43:46,616 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 05:43:46,618 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 05:43:46,619 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 05:43:46,620 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 05:43:46,620 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 05:43:46,621 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 05:43:46,621 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 05:43:46,622 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 05:43:46,623 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 05:43:46,623 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 05:43:46,624 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 05:43:46,625 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 05:43:46,627 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 05:43:46,628 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 05:43:46,629 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 05:43:46,630 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 05:43:46,631 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 05:43:46,631 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 05:43:46,632 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 05:43:46,632 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 05:43:46,633 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 05:43:46,634 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 05:43:46,634 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 05:43:46,635 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 05:43:46,635 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 05:43:46,636 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 05:43:46,636 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 05:43:46,636 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 05:43:46,637 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 05:43:46,637 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 05:43:46,638 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 05:43:46,648 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 05:43:46,648 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 05:43:46,649 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 05:43:46,649 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 05:43:46,649 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 05:43:46,650 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 05:43:46,650 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 05:43:46,650 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 05:43:46,650 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 05:43:46,650 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 05:43:46,650 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 05:43:46,650 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 05:43:46,651 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 05:43:46,651 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 05:43:46,651 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 05:43:46,651 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 05:43:46,651 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 05:43:46,651 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 05:43:46,651 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 05:43:46,651 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 05:43:46,652 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 05:43:46,652 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 05:43:46,652 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 05:43:46,652 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 05:43:46,652 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 05:43:46,652 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 05:43:46,652 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 05:43:46,653 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 05:43:46,653 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 05:43:46,653 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/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 -> 595c6555624af5bbcf79585a20acb2500e3eeee8 [2018-11-10 05:43:46,674 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 05:43:46,683 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 05:43:46,684 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 05:43:46,685 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 05:43:46,686 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 05:43:46,686 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-10 05:43:46,721 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/data/6a9e3002a/acd028d796f54a33984fd38e4d908565/FLAG3779dd30e [2018-11-10 05:43:47,115 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 05:43:47,115 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-10 05:43:47,120 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/data/6a9e3002a/acd028d796f54a33984fd38e4d908565/FLAG3779dd30e [2018-11-10 05:43:47,130 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/data/6a9e3002a/acd028d796f54a33984fd38e4d908565 [2018-11-10 05:43:47,132 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 05:43:47,133 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 05:43:47,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 05:43:47,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 05:43:47,136 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 05:43:47,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:43:47" (1/1) ... [2018-11-10 05:43:47,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62ca410a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:47, skipping insertion in model container [2018-11-10 05:43:47,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:43:47" (1/1) ... [2018-11-10 05:43:47,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 05:43:47,154 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 05:43:47,255 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:43:47,257 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 05:43:47,268 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:43:47,277 INFO L193 MainTranslator]: Completed translation [2018-11-10 05:43:47,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:47 WrapperNode [2018-11-10 05:43:47,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 05:43:47,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 05:43:47,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 05:43:47,278 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 05:43:47,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:47" (1/1) ... [2018-11-10 05:43:47,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:47" (1/1) ... [2018-11-10 05:43:47,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:47" (1/1) ... [2018-11-10 05:43:47,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:47" (1/1) ... [2018-11-10 05:43:47,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:47" (1/1) ... [2018-11-10 05:43:47,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:47" (1/1) ... [2018-11-10 05:43:47,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:47" (1/1) ... [2018-11-10 05:43:47,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 05:43:47,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 05:43:47,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 05:43:47,295 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 05:43:47,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/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 [2018-11-10 05:43:47,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 05:43:47,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 05:43:47,366 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-10 05:43:47,366 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-10 05:43:47,366 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 05:43:47,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-10 05:43:47,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 05:43:47,366 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-10 05:43:47,367 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-10 05:43:47,367 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 05:43:47,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 05:43:47,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 05:43:47,466 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 05:43:47,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:43:47 BoogieIcfgContainer [2018-11-10 05:43:47,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 05:43:47,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 05:43:47,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 05:43:47,470 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 05:43:47,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 05:43:47" (1/3) ... [2018-11-10 05:43:47,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d03d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:43:47, skipping insertion in model container [2018-11-10 05:43:47,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:47" (2/3) ... [2018-11-10 05:43:47,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d03d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:43:47, skipping insertion in model container [2018-11-10 05:43:47,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:43:47" (3/3) ... [2018-11-10 05:43:47,473 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-10 05:43:47,480 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 05:43:47,485 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 05:43:47,495 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 05:43:47,512 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 05:43:47,512 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 05:43:47,512 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 05:43:47,513 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 05:43:47,513 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 05:43:47,513 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 05:43:47,513 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 05:43:47,513 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 05:43:47,513 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 05:43:47,524 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-10 05:43:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 05:43:47,528 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:47,528 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:47,530 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:47,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:47,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-10 05:43:47,535 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:47,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:47,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:47,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:47,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:43:47,644 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:43:47,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 05:43:47,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 05:43:47,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 05:43:47,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 05:43:47,655 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-10 05:43:47,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:47,717 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-10 05:43:47,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 05:43:47,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 05:43:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:47,724 INFO L225 Difference]: With dead ends: 44 [2018-11-10 05:43:47,724 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 05:43:47,726 INFO L605 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 [2018-11-10 05:43:47,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 05:43:47,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-10 05:43:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 05:43:47,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-10 05:43:47,758 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-10 05:43:47,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:47,758 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-10 05:43:47,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 05:43:47,758 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-10 05:43:47,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-10 05:43:47,759 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:47,759 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:47,760 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:47,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:47,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-10 05:43:47,760 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:47,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:47,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:47,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:47,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:43:47,804 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:43:47,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 05:43:47,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 05:43:47,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 05:43:47,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 05:43:47,806 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-10 05:43:47,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:47,878 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-10 05:43:47,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 05:43:47,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-10 05:43:47,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:47,879 INFO L225 Difference]: With dead ends: 36 [2018-11-10 05:43:47,880 INFO L226 Difference]: Without dead ends: 32 [2018-11-10 05:43:47,880 INFO L605 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 [2018-11-10 05:43:47,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-10 05:43:47,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-10 05:43:47,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 05:43:47,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-10 05:43:47,887 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-10 05:43:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:47,887 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-10 05:43:47,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 05:43:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-10 05:43:47,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-10 05:43:47,888 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:47,888 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:47,888 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:47,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:47,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-10 05:43:47,888 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:47,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:47,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:47,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:47,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 05:43:47,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:47,964 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/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 [2018-11-10 05:43:47,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:47,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 05:43:48,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:48,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-10 05:43:48,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 05:43:48,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 05:43:48,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-10 05:43:48,054 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-11-10 05:43:48,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:48,192 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-11-10 05:43:48,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 05:43:48,192 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-11-10 05:43:48,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:48,193 INFO L225 Difference]: With dead ends: 58 [2018-11-10 05:43:48,193 INFO L226 Difference]: Without dead ends: 34 [2018-11-10 05:43:48,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-10 05:43:48,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-10 05:43:48,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-10 05:43:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-10 05:43:48,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-10 05:43:48,201 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-11-10 05:43:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:48,201 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-10 05:43:48,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 05:43:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-10 05:43:48,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 05:43:48,203 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:48,203 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-10 05:43:48,204 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:48,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:48,204 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-10 05:43:48,204 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:48,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:48,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:48,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:48,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 05:43:48,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:48,262 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/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 [2018-11-10 05:43:48,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:48,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 05:43:48,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:48,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-10 05:43:48,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 05:43:48,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 05:43:48,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-10 05:43:48,317 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-11-10 05:43:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:48,382 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-11-10 05:43:48,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 05:43:48,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-10 05:43:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:48,384 INFO L225 Difference]: With dead ends: 43 [2018-11-10 05:43:48,384 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 05:43:48,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-10 05:43:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 05:43:48,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-10 05:43:48,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-10 05:43:48,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-11-10 05:43:48,391 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-11-10 05:43:48,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:48,392 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-11-10 05:43:48,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 05:43:48,392 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-11-10 05:43:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-10 05:43:48,393 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:48,394 INFO L375 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, 1, 1, 1] [2018-11-10 05:43:48,394 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:48,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:48,394 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-10 05:43:48,394 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:48,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:48,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:48,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:48,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 05:43:48,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:48,441 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/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 [2018-11-10 05:43:48,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:48,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 05:43:48,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:48,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-11-10 05:43:48,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 05:43:48,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 05:43:48,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-10 05:43:48,546 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-11-10 05:43:48,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:48,676 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-11-10 05:43:48,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:43:48,677 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-11-10 05:43:48,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:48,677 INFO L225 Difference]: With dead ends: 70 [2018-11-10 05:43:48,678 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 05:43:48,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-11-10 05:43:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 05:43:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-10 05:43:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 05:43:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-11-10 05:43:48,683 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-11-10 05:43:48,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:48,683 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-11-10 05:43:48,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 05:43:48,683 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-11-10 05:43:48,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-10 05:43:48,684 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:48,684 INFO L375 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, 1, 1, 1, 1] [2018-11-10 05:43:48,684 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:48,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:48,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-11-10 05:43:48,685 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:48,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:48,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:48,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:48,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 05:43:48,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:48,723 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/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 [2018-11-10 05:43:48,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:48,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 05:43:48,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:48,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-11-10 05:43:48,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 05:43:48,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 05:43:48,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-10 05:43:48,801 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-11-10 05:43:48,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:48,890 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-11-10 05:43:48,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 05:43:48,890 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-11-10 05:43:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:48,892 INFO L225 Difference]: With dead ends: 61 [2018-11-10 05:43:48,892 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 05:43:48,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:43:48,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 05:43:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-11-10 05:43:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-10 05:43:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-11-10 05:43:48,899 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-11-10 05:43:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:48,900 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-11-10 05:43:48,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 05:43:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-11-10 05:43:48,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-10 05:43:48,902 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:48,902 INFO L375 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, 1, 1, 1, 1] [2018-11-10 05:43:48,902 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:48,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:48,903 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-11-10 05:43:48,903 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:48,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:48,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:48,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:48,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-10 05:43:48,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:48,986 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/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 [2018-11-10 05:43:48,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:49,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-10 05:43:49,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:49,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-11-10 05:43:49,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 05:43:49,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 05:43:49,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-10 05:43:49,074 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-11-10 05:43:49,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:49,159 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-11-10 05:43:49,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 05:43:49,160 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-11-10 05:43:49,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:49,162 INFO L225 Difference]: With dead ends: 71 [2018-11-10 05:43:49,162 INFO L226 Difference]: Without dead ends: 67 [2018-11-10 05:43:49,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:43:49,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-10 05:43:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-11-10 05:43:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-10 05:43:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-11-10 05:43:49,173 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-11-10 05:43:49,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:49,174 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-11-10 05:43:49,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 05:43:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-11-10 05:43:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-10 05:43:49,176 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:49,176 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:49,176 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:49,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-11-10 05:43:49,177 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:49,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:49,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:49,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:49,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-10 05:43:49,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:49,275 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/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 [2018-11-10 05:43:49,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:43:49,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:43:49,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:43:49,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-11-10 05:43:49,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:49,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2018-11-10 05:43:49,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 05:43:49,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 05:43:49,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-11-10 05:43:49,401 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 16 states. [2018-11-10 05:43:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:49,741 INFO L93 Difference]: Finished difference Result 146 states and 299 transitions. [2018-11-10 05:43:49,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 05:43:49,741 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2018-11-10 05:43:49,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:49,744 INFO L225 Difference]: With dead ends: 146 [2018-11-10 05:43:49,744 INFO L226 Difference]: Without dead ends: 103 [2018-11-10 05:43:49,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2018-11-10 05:43:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-10 05:43:49,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2018-11-10 05:43:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-10 05:43:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 157 transitions. [2018-11-10 05:43:49,759 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 157 transitions. Word has length 80 [2018-11-10 05:43:49,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:49,760 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 157 transitions. [2018-11-10 05:43:49,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 05:43:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 157 transitions. [2018-11-10 05:43:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-11-10 05:43:49,764 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:49,764 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:49,765 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:49,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:49,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2012686571, now seen corresponding path program 2 times [2018-11-10 05:43:49,765 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:49,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:49,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:49,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:43:49,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 78 proven. 181 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2018-11-10 05:43:49,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:49,903 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/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 [2018-11-10 05:43:49,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:43:49,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:43:49,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:43:49,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 54 proven. 196 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2018-11-10 05:43:50,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:50,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2018-11-10 05:43:50,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 05:43:50,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 05:43:50,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-11-10 05:43:50,067 INFO L87 Difference]: Start difference. First operand 87 states and 157 transitions. Second operand 18 states. [2018-11-10 05:43:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:50,519 INFO L93 Difference]: Finished difference Result 239 states and 535 transitions. [2018-11-10 05:43:50,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-10 05:43:50,520 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 175 [2018-11-10 05:43:50,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:50,522 INFO L225 Difference]: With dead ends: 239 [2018-11-10 05:43:50,522 INFO L226 Difference]: Without dead ends: 158 [2018-11-10 05:43:50,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2018-11-10 05:43:50,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-11-10 05:43:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2018-11-10 05:43:50,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-11-10 05:43:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 243 transitions. [2018-11-10 05:43:50,546 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 243 transitions. Word has length 175 [2018-11-10 05:43:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:50,547 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 243 transitions. [2018-11-10 05:43:50,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 05:43:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 243 transitions. [2018-11-10 05:43:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-11-10 05:43:50,551 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:50,552 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 12, 10, 10, 9, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:50,552 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:50,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:50,552 INFO L82 PathProgramCache]: Analyzing trace with hash -805716237, now seen corresponding path program 1 times [2018-11-10 05:43:50,552 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:50,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:50,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:50,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:43:50,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 214 proven. 21 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2018-11-10 05:43:50,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:50,681 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:43:50,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:50,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 216 proven. 61 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2018-11-10 05:43:50,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:50,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2018-11-10 05:43:50,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 05:43:50,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 05:43:50,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2018-11-10 05:43:50,867 INFO L87 Difference]: Start difference. First operand 139 states and 243 transitions. Second operand 18 states. [2018-11-10 05:43:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:51,189 INFO L93 Difference]: Finished difference Result 334 states and 683 transitions. [2018-11-10 05:43:51,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 05:43:51,190 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 178 [2018-11-10 05:43:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:51,192 INFO L225 Difference]: With dead ends: 334 [2018-11-10 05:43:51,193 INFO L226 Difference]: Without dead ends: 204 [2018-11-10 05:43:51,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2018-11-10 05:43:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-11-10 05:43:51,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 172. [2018-11-10 05:43:51,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-11-10 05:43:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 303 transitions. [2018-11-10 05:43:51,212 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 303 transitions. Word has length 178 [2018-11-10 05:43:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:51,212 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 303 transitions. [2018-11-10 05:43:51,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 05:43:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 303 transitions. [2018-11-10 05:43:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-10 05:43:51,215 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:51,215 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:51,215 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:51,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:51,215 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 2 times [2018-11-10 05:43:51,215 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:51,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:51,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:51,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:51,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-11-10 05:43:51,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:51,598 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:43:51,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:43:51,627 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:43:51,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:43:51,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-11-10 05:43:51,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:51,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2018-11-10 05:43:51,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-10 05:43:51,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-10 05:43:51,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-11-10 05:43:51,952 INFO L87 Difference]: Start difference. First operand 172 states and 303 transitions. Second operand 36 states. [2018-11-10 05:43:52,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:52,302 INFO L93 Difference]: Finished difference Result 285 states and 670 transitions. [2018-11-10 05:43:52,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-10 05:43:52,305 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2018-11-10 05:43:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:52,307 INFO L225 Difference]: With dead ends: 285 [2018-11-10 05:43:52,307 INFO L226 Difference]: Without dead ends: 281 [2018-11-10 05:43:52,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=1385, Unknown=0, NotChecked=0, Total=1482 [2018-11-10 05:43:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-11-10 05:43:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 220. [2018-11-10 05:43:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-11-10 05:43:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 480 transitions. [2018-11-10 05:43:52,329 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 480 transitions. Word has length 177 [2018-11-10 05:43:52,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:52,330 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 480 transitions. [2018-11-10 05:43:52,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-10 05:43:52,330 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 480 transitions. [2018-11-10 05:43:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-11-10 05:43:52,333 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:52,333 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 13, 13, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:52,333 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:52,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash 148219190, now seen corresponding path program 3 times [2018-11-10 05:43:52,333 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:52,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:52,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:52,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:43:52,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 122 proven. 164 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2018-11-10 05:43:52,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:52,397 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:43:52,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 05:43:52,451 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-10 05:43:52,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:43:52,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 188 proven. 160 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2018-11-10 05:43:52,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:52,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 13 [2018-11-10 05:43:52,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 05:43:52,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 05:43:52,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-11-10 05:43:52,540 INFO L87 Difference]: Start difference. First operand 220 states and 480 transitions. Second operand 13 states. [2018-11-10 05:43:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:52,752 INFO L93 Difference]: Finished difference Result 398 states and 955 transitions. [2018-11-10 05:43:52,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 05:43:52,753 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 219 [2018-11-10 05:43:52,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:52,756 INFO L225 Difference]: With dead ends: 398 [2018-11-10 05:43:52,756 INFO L226 Difference]: Without dead ends: 148 [2018-11-10 05:43:52,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2018-11-10 05:43:52,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-11-10 05:43:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 122. [2018-11-10 05:43:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-11-10 05:43:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 173 transitions. [2018-11-10 05:43:52,773 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 173 transitions. Word has length 219 [2018-11-10 05:43:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:52,774 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 173 transitions. [2018-11-10 05:43:52,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 05:43:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 173 transitions. [2018-11-10 05:43:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-10 05:43:52,776 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:52,776 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:52,776 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:52,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:52,778 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 4 times [2018-11-10 05:43:52,778 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:52,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:52,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:52,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:43:52,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2018-11-10 05:43:52,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:52,846 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:43:52,858 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 05:43:52,886 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 05:43:52,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:43:52,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2018-11-10 05:43:52,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:52,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-10 05:43:52,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 05:43:52,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 05:43:52,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-10 05:43:52,943 INFO L87 Difference]: Start difference. First operand 122 states and 173 transitions. Second operand 9 states. [2018-11-10 05:43:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:53,030 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2018-11-10 05:43:53,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 05:43:53,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 150 [2018-11-10 05:43:53,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:53,032 INFO L225 Difference]: With dead ends: 150 [2018-11-10 05:43:53,032 INFO L226 Difference]: Without dead ends: 146 [2018-11-10 05:43:53,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-11-10 05:43:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-11-10 05:43:53,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 125. [2018-11-10 05:43:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-11-10 05:43:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 182 transitions. [2018-11-10 05:43:53,041 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 182 transitions. Word has length 150 [2018-11-10 05:43:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:53,042 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 182 transitions. [2018-11-10 05:43:53,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 05:43:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 182 transitions. [2018-11-10 05:43:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-11-10 05:43:53,044 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:53,044 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:53,044 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:53,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:53,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1834449656, now seen corresponding path program 5 times [2018-11-10 05:43:53,044 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:53,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:53,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:53,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:43:53,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 97 proven. 194 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2018-11-10 05:43:53,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:53,186 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:43:53,192 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 05:43:53,215 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-11-10 05:43:53,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:43:53,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 406 proven. 68 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-11-10 05:43:53,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:53,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2018-11-10 05:43:53,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 05:43:53,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 05:43:53,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2018-11-10 05:43:53,282 INFO L87 Difference]: Start difference. First operand 125 states and 182 transitions. Second operand 16 states. [2018-11-10 05:43:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:53,521 INFO L93 Difference]: Finished difference Result 244 states and 377 transitions. [2018-11-10 05:43:53,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 05:43:53,521 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2018-11-10 05:43:53,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:53,522 INFO L225 Difference]: With dead ends: 244 [2018-11-10 05:43:53,522 INFO L226 Difference]: Without dead ends: 127 [2018-11-10 05:43:53,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2018-11-10 05:43:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-10 05:43:53,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2018-11-10 05:43:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-11-10 05:43:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 169 transitions. [2018-11-10 05:43:53,528 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 169 transitions. Word has length 163 [2018-11-10 05:43:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:53,528 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 169 transitions. [2018-11-10 05:43:53,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 05:43:53,529 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 169 transitions. [2018-11-10 05:43:53,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-10 05:43:53,529 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:53,530 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:53,530 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:53,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:53,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1604307506, now seen corresponding path program 6 times [2018-11-10 05:43:53,530 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:53,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:53,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:53,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:43:53,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 185 proven. 239 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2018-11-10 05:43:53,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:53,599 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:43:53,606 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 05:43:53,657 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-11-10 05:43:53,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:43:53,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 699 proven. 110 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2018-11-10 05:43:53,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:53,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 15 [2018-11-10 05:43:53,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 05:43:53,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 05:43:53,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:43:53,737 INFO L87 Difference]: Start difference. First operand 124 states and 169 transitions. Second operand 15 states. [2018-11-10 05:43:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:53,995 INFO L93 Difference]: Finished difference Result 253 states and 369 transitions. [2018-11-10 05:43:53,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-10 05:43:53,995 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 218 [2018-11-10 05:43:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:53,996 INFO L225 Difference]: With dead ends: 253 [2018-11-10 05:43:53,996 INFO L226 Difference]: Without dead ends: 131 [2018-11-10 05:43:53,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2018-11-10 05:43:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-11-10 05:43:54,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-11-10 05:43:54,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-11-10 05:43:54,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 172 transitions. [2018-11-10 05:43:54,005 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 172 transitions. Word has length 218 [2018-11-10 05:43:54,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:54,005 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 172 transitions. [2018-11-10 05:43:54,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 05:43:54,005 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 172 transitions. [2018-11-10 05:43:54,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-11-10 05:43:54,007 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:54,007 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:54,007 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:54,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:54,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1318513955, now seen corresponding path program 7 times [2018-11-10 05:43:54,007 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:54,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:54,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:54,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:43:54,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 99 proven. 291 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2018-11-10 05:43:54,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:54,134 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:43:54,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:54,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 103 proven. 285 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-11-10 05:43:54,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:54,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2018-11-10 05:43:54,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 05:43:54,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 05:43:54,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:43:54,243 INFO L87 Difference]: Start difference. First operand 131 states and 172 transitions. Second operand 15 states. [2018-11-10 05:43:54,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:54,369 INFO L93 Difference]: Finished difference Result 134 states and 175 transitions. [2018-11-10 05:43:54,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 05:43:54,369 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 204 [2018-11-10 05:43:54,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:54,369 INFO L225 Difference]: With dead ends: 134 [2018-11-10 05:43:54,370 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 05:43:54,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2018-11-10 05:43:54,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 05:43:54,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 05:43:54,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 05:43:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 05:43:54,371 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 204 [2018-11-10 05:43:54,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:54,371 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 05:43:54,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 05:43:54,371 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 05:43:54,372 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 05:43:54,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 05:43:54,456 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:43:54,465 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:43:54,475 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:43:54,483 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:43:54,542 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:43:54,842 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 31 [2018-11-10 05:43:55,278 WARN L179 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 32 [2018-11-10 05:43:55,280 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-10 05:43:55,280 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 05:43:55,280 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 05:43:55,280 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 05:43:55,280 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 05:43:55,280 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 05:43:55,281 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-11-10 05:43:55,281 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-10 05:43:55,281 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-11-10 05:43:55,281 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-10 05:43:55,281 INFO L425 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-10 05:43:55,281 INFO L425 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-11-10 05:43:55,281 INFO L421 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2018-11-10 05:43:55,281 INFO L425 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-11-10 05:43:55,281 INFO L425 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-11-10 05:43:55,281 INFO L428 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-11-10 05:43:55,281 INFO L421 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (< 1 |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n)) [2018-11-10 05:43:55,281 INFO L425 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-10 05:43:55,282 INFO L421 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse3 (<= fibo2_~n |fibo2_#in~n|)) (.cse0 (<= 1 |fibo2_#t~ret2|)) (.cse1 (<= |fibo2_#t~ret2| 1)) (.cse2 (<= |fibo2_#in~n| fibo2_~n))) (or (and .cse0 .cse1 (<= fibo2_~n 3) .cse2 (<= 3 |fibo2_#in~n|)) (and .cse3 .cse2 (<= 6 |fibo2_#in~n|)) (and .cse3 (<= |fibo2_#in~n| 4) (<= |fibo2_#t~ret2| 2) (<= 4 fibo2_~n) (<= 2 |fibo2_#t~ret2|)) (and .cse3 (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3) (<= 5 |fibo2_#in~n|) .cse2) (and (<= fibo2_~n 2) .cse0 .cse1 .cse2 (<= 2 |fibo2_#in~n|)))) [2018-11-10 05:43:55,282 INFO L425 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-10 05:43:55,282 INFO L425 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-11-10 05:43:55,282 INFO L425 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-11-10 05:43:55,282 INFO L425 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-11-10 05:43:55,282 INFO L425 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-11-10 05:43:55,282 INFO L428 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-11-10 05:43:55,282 INFO L421 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n)) [2018-11-10 05:43:55,282 INFO L425 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-10 05:43:55,282 INFO L421 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (or (<= 4 fibo1_~n) (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1))) (<= fibo1_~n |fibo1_#in~n|) (< 1 fibo1_~n) (let ((.cse0 (<= 5 |fibo1_#in~n|))) (or (<= |fibo1_#in~n| 3) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) (<= fibo1_~n 4)) (<= 7 |fibo1_#in~n|) (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|) .cse0) (and (<= |fibo1_#in~n| 5) .cse0))) (<= |fibo1_#in~n| fibo1_~n)) [2018-11-10 05:43:55,282 INFO L425 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-11-10 05:43:55,282 INFO L425 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-11-10 05:43:55,283 INFO L425 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-11-10 05:43:55,283 INFO L425 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-11-10 05:43:55,283 INFO L425 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-11-10 05:43:55,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 05:43:55 BoogieIcfgContainer [2018-11-10 05:43:55,285 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 05:43:55,286 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 05:43:55,286 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 05:43:55,286 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 05:43:55,286 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:43:47" (3/4) ... [2018-11-10 05:43:55,290 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 05:43:55,297 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 05:43:55,297 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 05:43:55,297 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-11-10 05:43:55,297 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-11-10 05:43:55,301 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-10 05:43:55,301 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-10 05:43:55,302 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-10 05:43:55,338 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_98af1b86-ff53-4e05-a0f9-a2164e95a7d4/bin-2019/uautomizer/witness.graphml [2018-11-10 05:43:55,339 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 05:43:55,339 INFO L168 Benchmark]: Toolchain (without parser) took 8206.91 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 383.3 MB). Free memory was 960.2 MB in the beginning and 936.5 MB in the end (delta: 23.7 MB). Peak memory consumption was 407.0 MB. Max. memory is 11.5 GB. [2018-11-10 05:43:55,340 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:43:55,340 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.93 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 05:43:55,340 INFO L168 Benchmark]: Boogie Preprocessor took 16.73 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:43:55,341 INFO L168 Benchmark]: RCFGBuilder took 172.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.8 MB). Free memory was 949.5 MB in the beginning and 1.2 GB in the end (delta: -216.2 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2018-11-10 05:43:55,341 INFO L168 Benchmark]: TraceAbstraction took 7818.16 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 204.5 MB). Free memory was 1.2 GB in the beginning and 936.5 MB in the end (delta: 229.2 MB). Peak memory consumption was 433.6 MB. Max. memory is 11.5 GB. [2018-11-10 05:43:55,341 INFO L168 Benchmark]: Witness Printer took 52.88 ms. Allocated memory is still 1.4 GB. Free memory was 936.5 MB in the beginning and 936.5 MB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2018-11-10 05:43:55,343 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 143.93 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.73 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 172.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.8 MB). Free memory was 949.5 MB in the beginning and 1.2 GB in the end (delta: -216.2 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7818.16 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 204.5 MB). Free memory was 1.2 GB in the beginning and 936.5 MB in the end (delta: 229.2 MB). Peak memory consumption was 433.6 MB. Max. memory is 11.5 GB. * Witness Printer took 52.88 ms. Allocated memory is still 1.4 GB. Free memory was 936.5 MB in the beginning and 936.5 MB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. SAFE Result, 7.7s OverallTime, 16 OverallIterations, 16 TraceHistogramMax, 3.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.9s HoareAnnotationTime, HoareTripleCheckerStatistics: 514 SDtfs, 593 SDslu, 4374 SDs, 0 SdLazy, 3959 SolverSat, 564 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2060 GetRequests, 1745 SyntacticMatches, 18 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=220occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 215 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 482 PreInvPairs, 759 NumberOfFragments, 166 HoareAnnotationTreeSize, 482 FomulaSimplifications, 16626 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 11 FomulaSimplificationsInter, 2885 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 3527 NumberOfCodeBlocks, 3300 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 3497 ConstructedInterpolants, 0 QuantifiedInterpolants, 1003441 SizeOfPredicates, 69 NumberOfNonLiveVariables, 3383 ConjunctsInSsa, 241 ConjunctsInUnsatCore, 30 InterpolantComputations, 2 PerfectInterpolantSequences, 12033/14758 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...