./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5_false-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_9965a739-ccbe-446b-bc86-8fbc41cd88e0/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/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 fe571d33601eb001defa960d70b02ea99b59263c ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 03:44:02,914 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 03:44:02,915 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 03:44:02,921 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 03:44:02,921 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 03:44:02,921 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 03:44:02,922 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 03:44:02,923 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 03:44:02,924 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 03:44:02,924 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 03:44:02,925 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 03:44:02,925 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 03:44:02,926 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 03:44:02,926 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 03:44:02,927 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 03:44:02,928 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 03:44:02,928 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 03:44:02,929 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 03:44:02,930 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 03:44:02,931 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 03:44:02,932 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 03:44:02,933 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 03:44:02,934 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 03:44:02,934 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 03:44:02,934 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 03:44:02,935 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 03:44:02,935 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 03:44:02,936 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 03:44:02,936 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 03:44:02,937 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 03:44:02,937 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 03:44:02,938 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 03:44:02,938 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 03:44:02,938 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 03:44:02,939 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 03:44:02,939 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 03:44:02,939 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 03:44:02,946 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 03:44:02,946 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 03:44:02,947 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 03:44:02,947 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 03:44:02,947 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 03:44:02,947 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 03:44:02,947 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 03:44:02,947 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 03:44:02,948 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 03:44:02,948 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 03:44:02,948 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 03:44:02,948 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 03:44:02,948 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 03:44:02,948 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 03:44:02,948 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 03:44:02,948 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 03:44:02,948 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 03:44:02,948 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 03:44:02,948 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 03:44:02,948 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 03:44:02,948 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 03:44:02,949 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 03:44:02,949 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 03:44:02,949 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 03:44:02,949 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 03:44:02,949 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 03:44:02,949 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 03:44:02,949 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 03:44:02,949 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 03:44:02,949 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_9965a739-ccbe-446b-bc86-8fbc41cd88e0/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 -> fe571d33601eb001defa960d70b02ea99b59263c [2018-11-10 03:44:02,972 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 03:44:02,978 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 03:44:02,980 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 03:44:02,981 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 03:44:02,981 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 03:44:02,982 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5_false-unreach-call_true-termination.c [2018-11-10 03:44:03,019 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/bin-2019/uautomizer/data/f60a6fc93/1839eb314b5e43439f0e064dcf1ac947/FLAGa2f8a404e [2018-11-10 03:44:03,399 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 03:44:03,399 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/sv-benchmarks/c/recursive-simple/fibo_2calls_5_false-unreach-call_true-termination.c [2018-11-10 03:44:03,403 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/bin-2019/uautomizer/data/f60a6fc93/1839eb314b5e43439f0e064dcf1ac947/FLAGa2f8a404e [2018-11-10 03:44:03,414 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/bin-2019/uautomizer/data/f60a6fc93/1839eb314b5e43439f0e064dcf1ac947 [2018-11-10 03:44:03,416 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 03:44:03,417 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 03:44:03,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 03:44:03,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 03:44:03,420 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 03:44:03,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 03:44:03" (1/1) ... [2018-11-10 03:44:03,423 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 03:44:03, skipping insertion in model container [2018-11-10 03:44:03,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 03:44:03" (1/1) ... [2018-11-10 03:44:03,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 03:44:03,438 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 03:44:03,531 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 03:44:03,533 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 03:44:03,542 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 03:44:03,549 INFO L193 MainTranslator]: Completed translation [2018-11-10 03:44:03,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:44:03 WrapperNode [2018-11-10 03:44:03,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 03:44:03,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 03:44:03,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 03:44:03,550 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 03:44:03,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:44:03" (1/1) ... [2018-11-10 03:44:03,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:44:03" (1/1) ... [2018-11-10 03:44:03,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:44:03" (1/1) ... [2018-11-10 03:44:03,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:44:03" (1/1) ... [2018-11-10 03:44:03,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:44:03" (1/1) ... [2018-11-10 03:44:03,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:44:03" (1/1) ... [2018-11-10 03:44:03,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:44:03" (1/1) ... [2018-11-10 03:44:03,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 03:44:03,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 03:44:03,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 03:44:03,571 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 03:44:03,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:44:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/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 03:44:03,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 03:44:03,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 03:44:03,645 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-10 03:44:03,645 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-10 03:44:03,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 03:44:03,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-10 03:44:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 03:44:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-10 03:44:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-10 03:44:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 03:44:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 03:44:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 03:44:03,767 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 03:44:03,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 03:44:03 BoogieIcfgContainer [2018-11-10 03:44:03,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 03:44:03,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 03:44:03,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 03:44:03,771 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 03:44:03,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 03:44:03" (1/3) ... [2018-11-10 03:44:03,772 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 03:44:03, skipping insertion in model container [2018-11-10 03:44:03,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:44:03" (2/3) ... [2018-11-10 03:44:03,772 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 03:44:03, skipping insertion in model container [2018-11-10 03:44:03,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 03:44:03" (3/3) ... [2018-11-10 03:44:03,774 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5_false-unreach-call_true-termination.c [2018-11-10 03:44:03,782 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 03:44:03,788 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 03:44:03,800 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 03:44:03,824 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 03:44:03,824 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 03:44:03,825 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 03:44:03,825 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 03:44:03,825 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 03:44:03,825 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 03:44:03,825 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 03:44:03,825 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 03:44:03,825 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 03:44:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-10 03:44:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 03:44:03,844 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:44:03,845 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:44:03,847 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:44:03,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:44:03,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-10 03:44:03,854 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:44:03,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:44:03,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:03,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:03,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:03,991 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 03:44:03,993 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 03:44:03,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 03:44:03,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 03:44:04,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 03:44:04,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 03:44:04,005 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-10 03:44:04,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:44:04,073 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-10 03:44:04,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 03:44:04,074 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 03:44:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:44:04,081 INFO L225 Difference]: With dead ends: 44 [2018-11-10 03:44:04,081 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 03:44:04,083 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 03:44:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 03:44:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-10 03:44:04,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 03:44:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-10 03:44:04,112 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-10 03:44:04,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:44:04,112 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-10 03:44:04,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 03:44:04,112 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-10 03:44:04,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-10 03:44:04,113 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:44:04,113 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:44:04,113 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:44:04,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:44:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-10 03:44:04,114 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:44:04,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:44:04,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:04,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:04,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:04,172 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 03:44:04,173 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 03:44:04,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 03:44:04,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 03:44:04,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 03:44:04,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 03:44:04,175 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-10 03:44:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:44:04,246 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-10 03:44:04,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 03:44:04,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-10 03:44:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:44:04,248 INFO L225 Difference]: With dead ends: 36 [2018-11-10 03:44:04,248 INFO L226 Difference]: Without dead ends: 32 [2018-11-10 03:44:04,249 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 03:44:04,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-10 03:44:04,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-10 03:44:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 03:44:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-10 03:44:04,255 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-10 03:44:04,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:44:04,255 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-10 03:44:04,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 03:44:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-10 03:44:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-10 03:44:04,256 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:44:04,257 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 03:44:04,257 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:44:04,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:44:04,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-10 03:44:04,259 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:44:04,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:44:04,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:04,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:04,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:04,319 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 03:44:04,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:44:04,320 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/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 03:44:04,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:04,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:44:04,393 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 03:44:04,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:44:04,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-10 03:44:04,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 03:44:04,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 03:44:04,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-10 03:44:04,411 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-11-10 03:44:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:44:04,550 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-11-10 03:44:04,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 03:44:04,551 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-11-10 03:44:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:44:04,552 INFO L225 Difference]: With dead ends: 58 [2018-11-10 03:44:04,552 INFO L226 Difference]: Without dead ends: 34 [2018-11-10 03:44:04,553 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 03:44:04,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-10 03:44:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-10 03:44:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-10 03:44:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-10 03:44:04,560 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-11-10 03:44:04,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:44:04,560 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-10 03:44:04,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 03:44:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-10 03:44:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 03:44:04,561 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:44:04,561 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 03:44:04,561 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:44:04,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:44:04,562 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-10 03:44:04,562 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:44:04,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:44:04,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:04,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:04,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:04,638 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 03:44:04,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:44:04,638 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/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 03:44:04,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:04,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:44:04,666 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 03:44:04,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:44:04,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-10 03:44:04,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 03:44:04,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 03:44:04,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-10 03:44:04,692 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-11-10 03:44:04,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:44:04,762 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-11-10 03:44:04,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 03:44:04,762 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-10 03:44:04,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:44:04,763 INFO L225 Difference]: With dead ends: 43 [2018-11-10 03:44:04,763 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 03:44:04,764 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 03:44:04,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 03:44:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-10 03:44:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-10 03:44:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-11-10 03:44:04,768 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-11-10 03:44:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:44:04,769 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-11-10 03:44:04,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 03:44:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-11-10 03:44:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-10 03:44:04,770 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:44:04,770 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 03:44:04,770 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:44:04,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:44:04,770 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-10 03:44:04,771 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:44:04,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:44:04,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:04,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:04,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:04,820 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 03:44:04,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:44:04,820 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/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 03:44:04,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:04,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:44:04,899 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 03:44:04,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:44:04,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-11-10 03:44:04,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 03:44:04,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 03:44:04,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-10 03:44:04,925 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-11-10 03:44:05,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:44:05,082 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-11-10 03:44:05,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 03:44:05,083 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-11-10 03:44:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:44:05,083 INFO L225 Difference]: With dead ends: 70 [2018-11-10 03:44:05,083 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 03:44:05,084 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 03:44:05,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 03:44:05,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-10 03:44:05,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 03:44:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-11-10 03:44:05,089 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-11-10 03:44:05,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:44:05,089 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-11-10 03:44:05,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 03:44:05,090 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-11-10 03:44:05,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-10 03:44:05,091 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:44:05,091 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 03:44:05,091 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:44:05,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:44:05,091 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-11-10 03:44:05,091 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:44:05,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:44:05,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:05,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:05,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:05,135 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 03:44:05,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:44:05,136 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/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 03:44:05,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:05,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:44:05,178 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 03:44:05,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:44:05,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-11-10 03:44:05,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 03:44:05,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 03:44:05,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-10 03:44:05,194 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-11-10 03:44:05,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:44:05,279 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-11-10 03:44:05,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 03:44:05,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-11-10 03:44:05,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:44:05,281 INFO L225 Difference]: With dead ends: 61 [2018-11-10 03:44:05,281 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 03:44:05,281 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 03:44:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 03:44:05,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-11-10 03:44:05,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-10 03:44:05,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-11-10 03:44:05,289 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-11-10 03:44:05,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:44:05,289 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-11-10 03:44:05,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 03:44:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-11-10 03:44:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-10 03:44:05,291 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:44:05,291 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 03:44:05,291 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:44:05,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:44:05,291 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-11-10 03:44:05,291 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:44:05,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:44:05,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:05,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:05,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:05,364 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 03:44:05,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:44:05,364 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/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 03:44:05,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:05,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:44:05,434 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 03:44:05,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:44:05,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-11-10 03:44:05,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 03:44:05,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 03:44:05,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-10 03:44:05,455 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-11-10 03:44:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:44:05,546 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-11-10 03:44:05,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 03:44:05,547 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-11-10 03:44:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:44:05,548 INFO L225 Difference]: With dead ends: 71 [2018-11-10 03:44:05,548 INFO L226 Difference]: Without dead ends: 67 [2018-11-10 03:44:05,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 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 03:44:05,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-10 03:44:05,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-11-10 03:44:05,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-10 03:44:05,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-11-10 03:44:05,557 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-11-10 03:44:05,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:44:05,557 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-11-10 03:44:05,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 03:44:05,558 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-11-10 03:44:05,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-10 03:44:05,560 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:44:05,560 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 03:44:05,561 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:44:05,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:44:05,561 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-11-10 03:44:05,561 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:44:05,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:44:05,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:05,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:05,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:05,641 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 03:44:05,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:44:05,641 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/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 03:44:05,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:44:05,668 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:44:05,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:44:05,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:44:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-10 03:44:05,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:44:05,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-11-10 03:44:05,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 03:44:05,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 03:44:05,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-11-10 03:44:05,743 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 14 states. [2018-11-10 03:44:06,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:44:06,026 INFO L93 Difference]: Finished difference Result 127 states and 238 transitions. [2018-11-10 03:44:06,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 03:44:06,028 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2018-11-10 03:44:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:44:06,029 INFO L225 Difference]: With dead ends: 127 [2018-11-10 03:44:06,029 INFO L226 Difference]: Without dead ends: 84 [2018-11-10 03:44:06,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2018-11-10 03:44:06,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-10 03:44:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2018-11-10 03:44:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-10 03:44:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 101 transitions. [2018-11-10 03:44:06,039 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 101 transitions. Word has length 80 [2018-11-10 03:44:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:44:06,039 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 101 transitions. [2018-11-10 03:44:06,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 03:44:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 101 transitions. [2018-11-10 03:44:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-10 03:44:06,042 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:44:06,042 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:44:06,043 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:44:06,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:44:06,043 INFO L82 PathProgramCache]: Analyzing trace with hash 733803902, now seen corresponding path program 1 times [2018-11-10 03:44:06,043 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:44:06,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:44:06,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:06,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:44:06,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 88 proven. 29 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-11-10 03:44:06,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:44:06,160 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/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 03:44:06,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:06,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:44:06,250 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 34 proven. 54 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2018-11-10 03:44:06,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:44:06,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2018-11-10 03:44:06,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 03:44:06,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 03:44:06,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2018-11-10 03:44:06,268 INFO L87 Difference]: Start difference. First operand 65 states and 101 transitions. Second operand 18 states. [2018-11-10 03:44:06,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:44:06,772 INFO L93 Difference]: Finished difference Result 171 states and 317 transitions. [2018-11-10 03:44:06,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-10 03:44:06,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 108 [2018-11-10 03:44:06,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:44:06,775 INFO L225 Difference]: With dead ends: 171 [2018-11-10 03:44:06,775 INFO L226 Difference]: Without dead ends: 103 [2018-11-10 03:44:06,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2018-11-10 03:44:06,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-10 03:44:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2018-11-10 03:44:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-10 03:44:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 127 transitions. [2018-11-10 03:44:06,790 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 127 transitions. Word has length 108 [2018-11-10 03:44:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:44:06,790 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 127 transitions. [2018-11-10 03:44:06,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 03:44:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 127 transitions. [2018-11-10 03:44:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-10 03:44:06,791 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:44:06,791 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 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 03:44:06,792 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:44:06,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:44:06,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 2 times [2018-11-10 03:44:06,792 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:44:06,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:44:06,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:06,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:06,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-11-10 03:44:06,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:44:06,891 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/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 03:44:06,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:44:06,920 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:44:06,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:44:06,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:44:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-10 03:44:07,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:44:07,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2018-11-10 03:44:07,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 03:44:07,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 03:44:07,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-11-10 03:44:07,009 INFO L87 Difference]: Start difference. First operand 85 states and 127 transitions. Second operand 15 states. [2018-11-10 03:44:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:44:07,323 INFO L93 Difference]: Finished difference Result 212 states and 384 transitions. [2018-11-10 03:44:07,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-10 03:44:07,324 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2018-11-10 03:44:07,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:44:07,325 INFO L225 Difference]: With dead ends: 212 [2018-11-10 03:44:07,325 INFO L226 Difference]: Without dead ends: 140 [2018-11-10 03:44:07,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2018-11-10 03:44:07,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-11-10 03:44:07,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2018-11-10 03:44:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-11-10 03:44:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 209 transitions. [2018-11-10 03:44:07,341 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 209 transitions. Word has length 82 [2018-11-10 03:44:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:44:07,341 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 209 transitions. [2018-11-10 03:44:07,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 03:44:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 209 transitions. [2018-11-10 03:44:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-11-10 03:44:07,344 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:44:07,344 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:44:07,344 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:44:07,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:44:07,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1282397779, now seen corresponding path program 3 times [2018-11-10 03:44:07,345 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:44:07,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:44:07,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:07,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:44:07,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 114 proven. 36 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2018-11-10 03:44:07,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:44:07,432 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/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 03:44:07,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:44:07,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 03:44:07,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:44:07,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:44:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 86 proven. 20 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-11-10 03:44:07,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:44:07,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2018-11-10 03:44:07,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 03:44:07,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 03:44:07,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2018-11-10 03:44:07,558 INFO L87 Difference]: Start difference. First operand 128 states and 209 transitions. Second operand 14 states. [2018-11-10 03:44:07,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:44:07,790 INFO L93 Difference]: Finished difference Result 279 states and 505 transitions. [2018-11-10 03:44:07,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 03:44:07,792 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2018-11-10 03:44:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:44:07,795 INFO L225 Difference]: With dead ends: 279 [2018-11-10 03:44:07,795 INFO L226 Difference]: Without dead ends: 163 [2018-11-10 03:44:07,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2018-11-10 03:44:07,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-11-10 03:44:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 144. [2018-11-10 03:44:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-11-10 03:44:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 235 transitions. [2018-11-10 03:44:07,811 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 235 transitions. Word has length 124 [2018-11-10 03:44:07,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:44:07,811 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 235 transitions. [2018-11-10 03:44:07,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 03:44:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 235 transitions. [2018-11-10 03:44:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-10 03:44:07,814 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:44:07,815 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:44:07,815 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:44:07,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:44:07,815 INFO L82 PathProgramCache]: Analyzing trace with hash 2145076032, now seen corresponding path program 1 times [2018-11-10 03:44:07,815 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:44:07,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:44:07,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:07,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:44:07,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 105 proven. 25 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2018-11-10 03:44:07,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:44:07,913 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/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 03:44:07,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:44:07,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:44:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 68 proven. 96 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-11-10 03:44:08,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:44:08,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2018-11-10 03:44:08,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 03:44:08,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 03:44:08,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-11-10 03:44:08,040 INFO L87 Difference]: Start difference. First operand 144 states and 235 transitions. Second operand 15 states. [2018-11-10 03:44:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:44:08,227 INFO L93 Difference]: Finished difference Result 177 states and 319 transitions. [2018-11-10 03:44:08,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 03:44:08,228 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 136 [2018-11-10 03:44:08,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:44:08,230 INFO L225 Difference]: With dead ends: 177 [2018-11-10 03:44:08,230 INFO L226 Difference]: Without dead ends: 115 [2018-11-10 03:44:08,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2018-11-10 03:44:08,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-10 03:44:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2018-11-10 03:44:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-11-10 03:44:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 150 transitions. [2018-11-10 03:44:08,242 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 150 transitions. Word has length 136 [2018-11-10 03:44:08,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:44:08,242 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 150 transitions. [2018-11-10 03:44:08,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 03:44:08,243 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 150 transitions. [2018-11-10 03:44:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-10 03:44:08,244 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:44:08,244 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:44:08,244 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:44:08,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:44:08,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 2 times [2018-11-10 03:44:08,245 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:44:08,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:44:08,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:08,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:44:08,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:44:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 03:44:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 03:44:08,278 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 03:44:08,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 03:44:08 BoogieIcfgContainer [2018-11-10 03:44:08,303 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 03:44:08,303 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 03:44:08,303 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 03:44:08,304 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 03:44:08,304 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 03:44:03" (3/4) ... [2018-11-10 03:44:08,306 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 03:44:08,353 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_9965a739-ccbe-446b-bc86-8fbc41cd88e0/bin-2019/uautomizer/witness.graphml [2018-11-10 03:44:08,353 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 03:44:08,354 INFO L168 Benchmark]: Toolchain (without parser) took 4937.90 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 315.1 MB). Free memory was 960.3 MB in the beginning and 1.1 GB in the end (delta: -107.5 MB). Peak memory consumption was 207.6 MB. Max. memory is 11.5 GB. [2018-11-10 03:44:08,356 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 03:44:08,356 INFO L168 Benchmark]: CACSL2BoogieTranslator took 132.83 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 03:44:08,356 INFO L168 Benchmark]: Boogie Preprocessor took 20.67 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 03:44:08,356 INFO L168 Benchmark]: RCFGBuilder took 196.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -176.1 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2018-11-10 03:44:08,357 INFO L168 Benchmark]: TraceAbstraction took 4534.73 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 174.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 57.8 MB). Peak memory consumption was 232.4 MB. Max. memory is 11.5 GB. [2018-11-10 03:44:08,357 INFO L168 Benchmark]: Witness Printer took 50.07 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 03:44:08,358 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 132.83 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.67 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 196.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -176.1 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4534.73 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 174.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 57.8 MB). Peak memory consumption was 232.4 MB. Max. memory is 11.5 GB. * Witness Printer took 50.07 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 5; VAL [x=5] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L23] EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L23] EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] RET return fibo1(n-1) + fibo1(n-2); [L13] EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L13] EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] RET return fibo2(n-1) + fibo2(n-2); [L23] EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L13] EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L13] EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] RET return fibo2(n-1) + fibo2(n-2); [L23] EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] RET return fibo1(n-1) + fibo1(n-2); [L13] EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L13] EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L13] EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] RET return fibo2(n-1) + fibo2(n-2); [L23] EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L23] EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] RET return fibo1(n-1) + fibo1(n-2); [L13] EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] RET return fibo2(n-1) + fibo2(n-2); [L37] EXPR fibo1(x) VAL [fibo1(x)=5, x=5] [L37] int result = fibo1(x); [L38] COND TRUE result == 5 VAL [result=5, x=5] [L39] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. UNSAFE Result, 4.4s OverallTime, 13 OverallIterations, 10 TraceHistogramMax, 2.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 342 SDtfs, 408 SDslu, 1889 SDs, 0 SdLazy, 2420 SolverSat, 370 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 901 GetRequests, 712 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred 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, 12 MinimizatonAttempts, 108 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 1568 NumberOfCodeBlocks, 1493 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1437 ConstructedInterpolants, 0 QuantifiedInterpolants, 202239 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1443 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 2364/2826 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...