./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_15_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_15_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/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 e276c1695adb4f8d30ce6cf27956cb3af3968bc9 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-01 17:38:27,961 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 17:38:27,962 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 17:38:27,970 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 17:38:27,970 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 17:38:27,971 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 17:38:27,972 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 17:38:27,973 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 17:38:27,974 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 17:38:27,975 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 17:38:27,975 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 17:38:27,976 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 17:38:27,976 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 17:38:27,977 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 17:38:27,978 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 17:38:27,978 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 17:38:27,979 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 17:38:27,980 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 17:38:27,981 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 17:38:27,982 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 17:38:27,983 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 17:38:27,984 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 17:38:27,986 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 17:38:27,986 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 17:38:27,986 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 17:38:27,987 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 17:38:27,987 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 17:38:27,988 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 17:38:27,988 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 17:38:27,989 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 17:38:27,989 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 17:38:27,990 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 17:38:27,990 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 17:38:27,990 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 17:38:27,991 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 17:38:27,991 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 17:38:27,991 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-01 17:38:28,001 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 17:38:28,001 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 17:38:28,001 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 17:38:28,002 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 17:38:28,002 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 17:38:28,002 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 17:38:28,002 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 17:38:28,003 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 17:38:28,003 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 17:38:28,003 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 17:38:28,003 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 17:38:28,003 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 17:38:28,003 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 17:38:28,003 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 17:38:28,003 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 17:38:28,003 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 17:38:28,004 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 17:38:28,004 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 17:38:28,004 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 17:38:28,004 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 17:38:28,004 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 17:38:28,004 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 17:38:28,004 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 17:38:28,004 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 17:38:28,005 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 17:38:28,005 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 17:38:28,005 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 17:38:28,005 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 17:38:28,005 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 17:38:28,005 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 17:38:28,005 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_8667c51f-b00e-4d73-9760-f9eb3be72509/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 -> e276c1695adb4f8d30ce6cf27956cb3af3968bc9 [2018-12-01 17:38:28,028 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 17:38:28,034 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 17:38:28,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 17:38:28,037 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 17:38:28,037 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 17:38:28,037 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_15_true-unreach-call.c [2018-12-01 17:38:28,072 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/data/090a62ae8/4711c012ede741c68ba631bdb231a032/FLAGc9fa945a8 [2018-12-01 17:38:28,440 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 17:38:28,440 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/sv-benchmarks/c/recursive-simple/fibo_15_true-unreach-call.c [2018-12-01 17:38:28,443 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/data/090a62ae8/4711c012ede741c68ba631bdb231a032/FLAGc9fa945a8 [2018-12-01 17:38:28,451 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/data/090a62ae8/4711c012ede741c68ba631bdb231a032 [2018-12-01 17:38:28,453 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 17:38:28,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 17:38:28,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 17:38:28,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 17:38:28,456 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 17:38:28,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 05:38:28" (1/1) ... [2018-12-01 17:38:28,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3163dfbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:38:28, skipping insertion in model container [2018-12-01 17:38:28,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 05:38:28" (1/1) ... [2018-12-01 17:38:28,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 17:38:28,471 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 17:38:28,550 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 17:38:28,552 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 17:38:28,561 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 17:38:28,568 INFO L195 MainTranslator]: Completed translation [2018-12-01 17:38:28,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:38:28 WrapperNode [2018-12-01 17:38:28,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 17:38:28,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 17:38:28,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 17:38:28,569 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 17:38:28,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:38:28" (1/1) ... [2018-12-01 17:38:28,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:38:28" (1/1) ... [2018-12-01 17:38:28,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 17:38:28,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 17:38:28,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 17:38:28,581 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 17:38:28,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:38:28" (1/1) ... [2018-12-01 17:38:28,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:38:28" (1/1) ... [2018-12-01 17:38:28,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:38:28" (1/1) ... [2018-12-01 17:38:28,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:38:28" (1/1) ... [2018-12-01 17:38:28,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:38:28" (1/1) ... [2018-12-01 17:38:28,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:38:28" (1/1) ... [2018-12-01 17:38:28,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:38:28" (1/1) ... [2018-12-01 17:38:28,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 17:38:28,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 17:38:28,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 17:38:28,592 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 17:38:28,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:38:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/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 [2018-12-01 17:38:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 17:38:28,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 17:38:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 17:38:28,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 17:38:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 17:38:28,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 17:38:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-12-01 17:38:28,652 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-12-01 17:38:28,730 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 17:38:28,730 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-01 17:38:28,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 05:38:28 BoogieIcfgContainer [2018-12-01 17:38:28,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 17:38:28,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 17:38:28,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 17:38:28,733 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 17:38:28,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 05:38:28" (1/3) ... [2018-12-01 17:38:28,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d59e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 05:38:28, skipping insertion in model container [2018-12-01 17:38:28,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:38:28" (2/3) ... [2018-12-01 17:38:28,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d59e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 05:38:28, skipping insertion in model container [2018-12-01 17:38:28,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 05:38:28" (3/3) ... [2018-12-01 17:38:28,735 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_15_true-unreach-call.c [2018-12-01 17:38:28,741 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 17:38:28,745 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-01 17:38:28,754 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-01 17:38:28,772 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 17:38:28,772 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 17:38:28,772 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 17:38:28,772 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 17:38:28,772 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 17:38:28,773 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 17:38:28,773 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 17:38:28,773 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 17:38:28,773 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 17:38:28,783 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-12-01 17:38:28,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-01 17:38:28,787 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:28,787 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:28,788 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:28,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:28,792 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-12-01 17:38:28,793 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:28,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:28,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:28,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:38:28,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 17:38:28,885 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 17:38:28,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 17:38:28,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 17:38:28,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 17:38:28,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 17:38:28,897 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-12-01 17:38:28,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:28,949 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-12-01 17:38:28,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 17:38:28,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-01 17:38:28,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:28,956 INFO L225 Difference]: With dead ends: 35 [2018-12-01 17:38:28,956 INFO L226 Difference]: Without dead ends: 21 [2018-12-01 17:38:28,957 INFO L631 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 [2018-12-01 17:38:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-01 17:38:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-01 17:38:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-01 17:38:28,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-12-01 17:38:28,982 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-12-01 17:38:28,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:28,982 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-12-01 17:38:28,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 17:38:28,982 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-12-01 17:38:28,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-01 17:38:28,983 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:28,983 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:28,983 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:28,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:28,984 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-12-01 17:38:28,984 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:28,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:28,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:28,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:38:28,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 17:38:29,011 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 17:38:29,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 17:38:29,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 17:38:29,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 17:38:29,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 17:38:29,013 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-12-01 17:38:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:29,057 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-12-01 17:38:29,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 17:38:29,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-01 17:38:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:29,058 INFO L225 Difference]: With dead ends: 27 [2018-12-01 17:38:29,058 INFO L226 Difference]: Without dead ends: 23 [2018-12-01 17:38:29,059 INFO L631 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 [2018-12-01 17:38:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-01 17:38:29,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-12-01 17:38:29,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-01 17:38:29,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-12-01 17:38:29,064 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-12-01 17:38:29,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:29,065 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-12-01 17:38:29,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 17:38:29,065 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-12-01 17:38:29,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-01 17:38:29,066 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:29,066 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:29,066 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:29,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:29,066 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-12-01 17:38:29,067 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:29,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:29,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:29,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:38:29,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-01 17:38:29,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:29,120 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/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 [2018-12-01 17:38:29,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:38:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:29,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-01 17:38:29,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:29,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-12-01 17:38:29,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-01 17:38:29,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-01 17:38:29,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-12-01 17:38:29,192 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-12-01 17:38:29,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:29,253 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-12-01 17:38:29,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 17:38:29,253 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-12-01 17:38:29,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:29,254 INFO L225 Difference]: With dead ends: 38 [2018-12-01 17:38:29,254 INFO L226 Difference]: Without dead ends: 23 [2018-12-01 17:38:29,254 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-12-01 17:38:29,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-01 17:38:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-01 17:38:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-01 17:38:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-12-01 17:38:29,258 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-12-01 17:38:29,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:29,258 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-12-01 17:38:29,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-01 17:38:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-12-01 17:38:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-01 17:38:29,259 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:29,259 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:29,259 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:29,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:29,259 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-12-01 17:38:29,259 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:29,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:29,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:29,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:38:29,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-01 17:38:29,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:29,297 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/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 [2018-12-01 17:38:29,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:38:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:29,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-01 17:38:29,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:29,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-01 17:38:29,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 17:38:29,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 17:38:29,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-01 17:38:29,333 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-12-01 17:38:29,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:29,368 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-12-01 17:38:29,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 17:38:29,368 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-12-01 17:38:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:29,369 INFO L225 Difference]: With dead ends: 32 [2018-12-01 17:38:29,369 INFO L226 Difference]: Without dead ends: 28 [2018-12-01 17:38:29,370 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-01 17:38:29,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-01 17:38:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-01 17:38:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-01 17:38:29,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-12-01 17:38:29,374 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-12-01 17:38:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:29,374 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-12-01 17:38:29,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 17:38:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-12-01 17:38:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-01 17:38:29,375 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:29,375 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:29,375 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:29,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:29,376 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-12-01 17:38:29,376 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:29,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:29,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:29,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:38:29,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-01 17:38:29,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:29,408 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/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 [2018-12-01 17:38:29,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 17:38:29,425 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 17:38:29,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:38:29,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-01 17:38:29,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:29,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-12-01 17:38:29,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-01 17:38:29,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-01 17:38:29,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-01 17:38:29,482 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-12-01 17:38:29,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:29,536 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-12-01 17:38:29,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 17:38:29,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-12-01 17:38:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:29,538 INFO L225 Difference]: With dead ends: 40 [2018-12-01 17:38:29,538 INFO L226 Difference]: Without dead ends: 36 [2018-12-01 17:38:29,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-01 17:38:29,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-01 17:38:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-12-01 17:38:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-01 17:38:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-12-01 17:38:29,543 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-12-01 17:38:29,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:29,544 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-12-01 17:38:29,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-01 17:38:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-12-01 17:38:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-12-01 17:38:29,545 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:29,546 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:29,546 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:29,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:29,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-12-01 17:38:29,546 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:29,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:29,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:29,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:38:29,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-12-01 17:38:29,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:29,662 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/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 [2018-12-01 17:38:29,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 17:38:29,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-01 17:38:29,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:38:29,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-12-01 17:38:29,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:29,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-12-01 17:38:29,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-01 17:38:29,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-01 17:38:29,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-12-01 17:38:29,735 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-12-01 17:38:29,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:29,903 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-12-01 17:38:29,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-01 17:38:29,903 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-12-01 17:38:29,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:29,904 INFO L225 Difference]: With dead ends: 76 [2018-12-01 17:38:29,904 INFO L226 Difference]: Without dead ends: 49 [2018-12-01 17:38:29,905 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-12-01 17:38:29,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-01 17:38:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-12-01 17:38:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-01 17:38:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-12-01 17:38:29,910 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-12-01 17:38:29,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:29,911 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-12-01 17:38:29,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-01 17:38:29,911 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-12-01 17:38:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-12-01 17:38:29,912 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:29,912 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:29,912 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:29,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:29,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2018-12-01 17:38:29,913 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:29,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:29,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:29,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:38:29,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2018-12-01 17:38:29,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:29,966 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/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 [2018-12-01 17:38:29,973 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 17:38:29,985 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 17:38:29,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:38:29,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 74 proven. 118 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-12-01 17:38:30,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:30,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 13 [2018-12-01 17:38:30,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-01 17:38:30,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-01 17:38:30,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-12-01 17:38:30,050 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 13 states. [2018-12-01 17:38:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:30,296 INFO L93 Difference]: Finished difference Result 94 states and 158 transitions. [2018-12-01 17:38:30,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-01 17:38:30,296 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2018-12-01 17:38:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:30,297 INFO L225 Difference]: With dead ends: 94 [2018-12-01 17:38:30,297 INFO L226 Difference]: Without dead ends: 57 [2018-12-01 17:38:30,298 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2018-12-01 17:38:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-01 17:38:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2018-12-01 17:38:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-01 17:38:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2018-12-01 17:38:30,302 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 82 [2018-12-01 17:38:30,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:30,302 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2018-12-01 17:38:30,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-01 17:38:30,303 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2018-12-01 17:38:30,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-12-01 17:38:30,303 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:30,304 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:30,304 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:30,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:30,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2018-12-01 17:38:30,304 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:30,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:30,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:30,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:38:30,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 174 proven. 59 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-12-01 17:38:30,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:30,367 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/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 [2018-12-01 17:38:30,373 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 17:38:30,394 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-12-01 17:38:30,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:38:30,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2018-12-01 17:38:30,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:30,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2018-12-01 17:38:30,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 17:38:30,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 17:38:30,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-01 17:38:30,433 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 9 states. [2018-12-01 17:38:30,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:30,504 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2018-12-01 17:38:30,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 17:38:30,504 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 109 [2018-12-01 17:38:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:30,505 INFO L225 Difference]: With dead ends: 63 [2018-12-01 17:38:30,505 INFO L226 Difference]: Without dead ends: 59 [2018-12-01 17:38:30,505 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-01 17:38:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-01 17:38:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-01 17:38:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-01 17:38:30,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2018-12-01 17:38:30,510 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 109 [2018-12-01 17:38:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:30,510 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2018-12-01 17:38:30,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 17:38:30,510 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2018-12-01 17:38:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-12-01 17:38:30,511 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:30,512 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:30,512 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:30,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:30,512 INFO L82 PathProgramCache]: Analyzing trace with hash 259499213, now seen corresponding path program 6 times [2018-12-01 17:38:30,512 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:30,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:30,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:30,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:38:30,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:30,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 328 proven. 115 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2018-12-01 17:38:30,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:30,616 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/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 [2018-12-01 17:38:30,622 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 17:38:30,664 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-12-01 17:38:30,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:38:30,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 202 proven. 241 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2018-12-01 17:38:30,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:30,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-01 17:38:30,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 17:38:30,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 17:38:30,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-01 17:38:30,730 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand 9 states. [2018-12-01 17:38:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:30,812 INFO L93 Difference]: Finished difference Result 76 states and 117 transitions. [2018-12-01 17:38:30,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 17:38:30,812 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 177 [2018-12-01 17:38:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:30,814 INFO L225 Difference]: With dead ends: 76 [2018-12-01 17:38:30,814 INFO L226 Difference]: Without dead ends: 72 [2018-12-01 17:38:30,814 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-01 17:38:30,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-12-01 17:38:30,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2018-12-01 17:38:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-01 17:38:30,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2018-12-01 17:38:30,823 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 177 [2018-12-01 17:38:30,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:30,824 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2018-12-01 17:38:30,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 17:38:30,824 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2018-12-01 17:38:30,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-12-01 17:38:30,828 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:30,829 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:30,829 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:30,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:30,829 INFO L82 PathProgramCache]: Analyzing trace with hash 949186696, now seen corresponding path program 7 times [2018-12-01 17:38:30,829 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:30,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:30,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:30,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:38:30,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 851 proven. 284 refuted. 0 times theorem prover too weak. 4904 trivial. 0 not checked. [2018-12-01 17:38:30,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:30,955 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/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 [2018-12-01 17:38:30,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:38:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:31,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 225 proven. 1327 refuted. 0 times theorem prover too weak. 4487 trivial. 0 not checked. [2018-12-01 17:38:31,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:31,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2018-12-01 17:38:31,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-01 17:38:31,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-01 17:38:31,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-01 17:38:31,120 INFO L87 Difference]: Start difference. First operand 64 states and 89 transitions. Second operand 11 states. [2018-12-01 17:38:31,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:31,220 INFO L93 Difference]: Finished difference Result 86 states and 157 transitions. [2018-12-01 17:38:31,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-01 17:38:31,220 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 327 [2018-12-01 17:38:31,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:31,222 INFO L225 Difference]: With dead ends: 86 [2018-12-01 17:38:31,222 INFO L226 Difference]: Without dead ends: 82 [2018-12-01 17:38:31,222 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-01 17:38:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-12-01 17:38:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 69. [2018-12-01 17:38:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-01 17:38:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 104 transitions. [2018-12-01 17:38:31,229 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 104 transitions. Word has length 327 [2018-12-01 17:38:31,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:31,229 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 104 transitions. [2018-12-01 17:38:31,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-01 17:38:31,229 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 104 transitions. [2018-12-01 17:38:31,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-12-01 17:38:31,233 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:31,233 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:31,233 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:31,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:31,234 INFO L82 PathProgramCache]: Analyzing trace with hash -229001048, now seen corresponding path program 8 times [2018-12-01 17:38:31,234 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:31,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:31,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:31,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:38:31,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 1412 proven. 592 refuted. 0 times theorem prover too weak. 10383 trivial. 0 not checked. [2018-12-01 17:38:31,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:31,376 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/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 [2018-12-01 17:38:31,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 17:38:31,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 17:38:31,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:38:31,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2270 refuted. 0 times theorem prover too weak. 9756 trivial. 0 not checked. [2018-12-01 17:38:31,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:31,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 12 [2018-12-01 17:38:31,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-01 17:38:31,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-01 17:38:31,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-01 17:38:31,595 INFO L87 Difference]: Start difference. First operand 69 states and 104 transitions. Second operand 12 states. [2018-12-01 17:38:31,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:31,732 INFO L93 Difference]: Finished difference Result 78 states and 126 transitions. [2018-12-01 17:38:31,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-01 17:38:31,732 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 463 [2018-12-01 17:38:31,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:31,733 INFO L225 Difference]: With dead ends: 78 [2018-12-01 17:38:31,733 INFO L226 Difference]: Without dead ends: 74 [2018-12-01 17:38:31,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-12-01 17:38:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-12-01 17:38:31,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-12-01 17:38:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-01 17:38:31,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 121 transitions. [2018-12-01 17:38:31,739 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 121 transitions. Word has length 463 [2018-12-01 17:38:31,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:31,739 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 121 transitions. [2018-12-01 17:38:31,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-01 17:38:31,739 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 121 transitions. [2018-12-01 17:38:31,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1309 [2018-12-01 17:38:31,745 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:31,745 INFO L402 BasicCegarLoop]: trace histogram [191, 191, 155, 95, 95, 95, 95, 95, 95, 95, 60, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:31,745 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:31,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:31,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1694927924, now seen corresponding path program 9 times [2018-12-01 17:38:31,746 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:31,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:31,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:31,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:38:31,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 102375 backedges. 5046 proven. 2075 refuted. 0 times theorem prover too weak. 95254 trivial. 0 not checked. [2018-12-01 17:38:32,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:32,335 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/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 [2018-12-01 17:38:32,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 17:38:32,440 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-12-01 17:38:32,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:38:32,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 102375 backedges. 6962 proven. 322 refuted. 0 times theorem prover too weak. 95091 trivial. 0 not checked. [2018-12-01 17:38:32,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:32,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-12-01 17:38:32,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-01 17:38:32,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-01 17:38:32,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-12-01 17:38:32,960 INFO L87 Difference]: Start difference. First operand 74 states and 121 transitions. Second operand 16 states. [2018-12-01 17:38:33,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:33,477 INFO L93 Difference]: Finished difference Result 214 states and 495 transitions. [2018-12-01 17:38:33,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-01 17:38:33,478 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1308 [2018-12-01 17:38:33,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:33,481 INFO L225 Difference]: With dead ends: 214 [2018-12-01 17:38:33,481 INFO L226 Difference]: Without dead ends: 150 [2018-12-01 17:38:33,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1352 GetRequests, 1310 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=473, Invalid=1419, Unknown=0, NotChecked=0, Total=1892 [2018-12-01 17:38:33,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-12-01 17:38:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 129. [2018-12-01 17:38:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-12-01 17:38:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 232 transitions. [2018-12-01 17:38:33,497 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 232 transitions. Word has length 1308 [2018-12-01 17:38:33,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:33,497 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 232 transitions. [2018-12-01 17:38:33,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-01 17:38:33,498 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 232 transitions. [2018-12-01 17:38:33,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 995 [2018-12-01 17:38:33,508 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:33,508 INFO L402 BasicCegarLoop]: trace histogram [145, 145, 117, 72, 72, 72, 72, 72, 72, 72, 45, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:33,508 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:33,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:33,508 INFO L82 PathProgramCache]: Analyzing trace with hash -727707223, now seen corresponding path program 10 times [2018-12-01 17:38:33,508 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:33,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:33,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:33,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:38:33,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 58770 backedges. 3902 proven. 2088 refuted. 0 times theorem prover too weak. 52780 trivial. 0 not checked. [2018-12-01 17:38:33,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:33,926 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 17:38:33,932 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 17:38:34,034 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 17:38:34,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:38:34,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 58770 backedges. 31261 proven. 2981 refuted. 0 times theorem prover too weak. 24528 trivial. 0 not checked. [2018-12-01 17:38:34,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:34,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 23 [2018-12-01 17:38:34,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-01 17:38:34,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-01 17:38:34,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2018-12-01 17:38:34,469 INFO L87 Difference]: Start difference. First operand 129 states and 232 transitions. Second operand 23 states. [2018-12-01 17:38:34,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:34,988 INFO L93 Difference]: Finished difference Result 257 states and 530 transitions. [2018-12-01 17:38:34,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-01 17:38:34,989 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 994 [2018-12-01 17:38:34,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:34,990 INFO L225 Difference]: With dead ends: 257 [2018-12-01 17:38:34,990 INFO L226 Difference]: Without dead ends: 138 [2018-12-01 17:38:34,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1038 GetRequests, 986 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=579, Invalid=2177, Unknown=0, NotChecked=0, Total=2756 [2018-12-01 17:38:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-12-01 17:38:34,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2018-12-01 17:38:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-12-01 17:38:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 174 transitions. [2018-12-01 17:38:35,000 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 174 transitions. Word has length 994 [2018-12-01 17:38:35,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:35,001 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 174 transitions. [2018-12-01 17:38:35,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-01 17:38:35,001 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 174 transitions. [2018-12-01 17:38:35,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 927 [2018-12-01 17:38:35,005 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:35,005 INFO L402 BasicCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:35,006 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:35,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:35,006 INFO L82 PathProgramCache]: Analyzing trace with hash -589175644, now seen corresponding path program 11 times [2018-12-01 17:38:35,006 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:35,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:35,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:35,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:38:35,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 768 proven. 4887 refuted. 0 times theorem prover too weak. 45255 trivial. 0 not checked. [2018-12-01 17:38:35,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:35,316 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 17:38:35,322 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 17:38:35,672 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 112 check-sat command(s) [2018-12-01 17:38:35,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:38:35,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 5099 proven. 5514 refuted. 0 times theorem prover too weak. 40297 trivial. 0 not checked. [2018-12-01 17:38:35,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:35,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 23 [2018-12-01 17:38:35,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-01 17:38:35,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-01 17:38:35,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2018-12-01 17:38:35,999 INFO L87 Difference]: Start difference. First operand 121 states and 174 transitions. Second operand 23 states. [2018-12-01 17:38:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:36,576 INFO L93 Difference]: Finished difference Result 279 states and 520 transitions. [2018-12-01 17:38:36,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-01 17:38:36,576 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 926 [2018-12-01 17:38:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:36,579 INFO L225 Difference]: With dead ends: 279 [2018-12-01 17:38:36,579 INFO L226 Difference]: Without dead ends: 172 [2018-12-01 17:38:36,581 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 923 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=687, Invalid=2735, Unknown=0, NotChecked=0, Total=3422 [2018-12-01 17:38:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-12-01 17:38:36,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 150. [2018-12-01 17:38:36,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-12-01 17:38:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 231 transitions. [2018-12-01 17:38:36,593 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 231 transitions. Word has length 926 [2018-12-01 17:38:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:36,594 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 231 transitions. [2018-12-01 17:38:36,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-01 17:38:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 231 transitions. [2018-12-01 17:38:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1676 [2018-12-01 17:38:36,609 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:36,609 INFO L402 BasicCegarLoop]: trace histogram [245, 245, 198, 122, 122, 122, 122, 122, 122, 122, 76, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:36,609 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:36,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:36,610 INFO L82 PathProgramCache]: Analyzing trace with hash 667367253, now seen corresponding path program 12 times [2018-12-01 17:38:36,610 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:36,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:36,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:36,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:38:36,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 168587 backedges. 1383 proven. 10494 refuted. 0 times theorem prover too weak. 156710 trivial. 0 not checked. [2018-12-01 17:38:37,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:37,466 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 17:38:37,473 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 17:38:37,558 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-12-01 17:38:37,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:38:37,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 168587 backedges. 2569 proven. 9125 refuted. 0 times theorem prover too weak. 156893 trivial. 0 not checked. [2018-12-01 17:38:38,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:38,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2018-12-01 17:38:38,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-01 17:38:38,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-01 17:38:38,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-01 17:38:38,303 INFO L87 Difference]: Start difference. First operand 150 states and 231 transitions. Second operand 15 states. [2018-12-01 17:38:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:38,428 INFO L93 Difference]: Finished difference Result 159 states and 256 transitions. [2018-12-01 17:38:38,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-01 17:38:38,428 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 1675 [2018-12-01 17:38:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:38,431 INFO L225 Difference]: With dead ends: 159 [2018-12-01 17:38:38,431 INFO L226 Difference]: Without dead ends: 155 [2018-12-01 17:38:38,431 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1706 GetRequests, 1682 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-12-01 17:38:38,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-12-01 17:38:38,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-12-01 17:38:38,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-12-01 17:38:38,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 247 transitions. [2018-12-01 17:38:38,439 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 247 transitions. Word has length 1675 [2018-12-01 17:38:38,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:38,439 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 247 transitions. [2018-12-01 17:38:38,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-01 17:38:38,439 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 247 transitions. [2018-12-01 17:38:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2534 [2018-12-01 17:38:38,459 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:38,459 INFO L402 BasicCegarLoop]: trace histogram [371, 371, 300, 185, 185, 185, 185, 185, 185, 185, 115, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:38,459 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:38,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:38,460 INFO L82 PathProgramCache]: Analyzing trace with hash -641521464, now seen corresponding path program 13 times [2018-12-01 17:38:38,460 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:38,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:38,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:38,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:38:38,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 387470 backedges. 2418 proven. 17846 refuted. 0 times theorem prover too weak. 367206 trivial. 0 not checked. [2018-12-01 17:38:40,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:40,218 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 17:38:40,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:38:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:40,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 387470 backedges. 2364 proven. 19940 refuted. 0 times theorem prover too weak. 365166 trivial. 0 not checked. [2018-12-01 17:38:42,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:42,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2018-12-01 17:38:42,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-01 17:38:42,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-01 17:38:42,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-01 17:38:42,068 INFO L87 Difference]: Start difference. First operand 155 states and 247 transitions. Second operand 15 states. [2018-12-01 17:38:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:42,207 INFO L93 Difference]: Finished difference Result 164 states and 274 transitions. [2018-12-01 17:38:42,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-01 17:38:42,208 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 2533 [2018-12-01 17:38:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:42,210 INFO L225 Difference]: With dead ends: 164 [2018-12-01 17:38:42,211 INFO L226 Difference]: Without dead ends: 160 [2018-12-01 17:38:42,211 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2566 GetRequests, 2542 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-12-01 17:38:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-12-01 17:38:42,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-12-01 17:38:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-12-01 17:38:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 265 transitions. [2018-12-01 17:38:42,223 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 265 transitions. Word has length 2533 [2018-12-01 17:38:42,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:42,223 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 265 transitions. [2018-12-01 17:38:42,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-01 17:38:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 265 transitions. [2018-12-01 17:38:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5312 [2018-12-01 17:38:42,312 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:42,312 INFO L402 BasicCegarLoop]: trace histogram [779, 779, 630, 389, 389, 389, 389, 389, 389, 389, 241, 149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:42,312 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:42,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:42,313 INFO L82 PathProgramCache]: Analyzing trace with hash -802815256, now seen corresponding path program 14 times [2018-12-01 17:38:42,313 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:42,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:42,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:42,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:38:42,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:38:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1712123 backedges. 4867 proven. 42691 refuted. 0 times theorem prover too weak. 1664565 trivial. 0 not checked. [2018-12-01 17:38:49,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:38:49,017 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 17:38:49,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 17:38:49,680 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 17:38:49,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:38:49,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:38:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1712123 backedges. 4808 proven. 47149 refuted. 0 times theorem prover too weak. 1660166 trivial. 0 not checked. [2018-12-01 17:38:55,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:38:55,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2018-12-01 17:38:55,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-01 17:38:55,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-01 17:38:55,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-12-01 17:38:55,642 INFO L87 Difference]: Start difference. First operand 160 states and 265 transitions. Second operand 16 states. [2018-12-01 17:38:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:38:55,821 INFO L93 Difference]: Finished difference Result 169 states and 294 transitions. [2018-12-01 17:38:55,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-01 17:38:55,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 5311 [2018-12-01 17:38:55,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:38:55,825 INFO L225 Difference]: With dead ends: 169 [2018-12-01 17:38:55,825 INFO L226 Difference]: Without dead ends: 165 [2018-12-01 17:38:55,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5347 GetRequests, 5321 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-12-01 17:38:55,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-12-01 17:38:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-12-01 17:38:55,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-12-01 17:38:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 285 transitions. [2018-12-01 17:38:55,833 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 285 transitions. Word has length 5311 [2018-12-01 17:38:55,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:38:55,833 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 285 transitions. [2018-12-01 17:38:55,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-01 17:38:55,833 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 285 transitions. [2018-12-01 17:38:56,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9955 [2018-12-01 17:38:56,094 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:38:56,095 INFO L402 BasicCegarLoop]: trace histogram [1461, 1461, 1181, 730, 730, 730, 730, 730, 730, 730, 451, 280, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:38:56,095 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:38:56,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:38:56,096 INFO L82 PathProgramCache]: Analyzing trace with hash 711285207, now seen corresponding path program 15 times [2018-12-01 17:38:56,096 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:38:56,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:38:56,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:56,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:38:56,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:38:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:39:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6027250 backedges. 29102 proven. 88600 refuted. 0 times theorem prover too weak. 5909548 trivial. 0 not checked. [2018-12-01 17:39:17,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:39:17,869 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 17:39:17,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 17:39:18,179 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-12-01 17:39:18,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:39:18,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:39:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6027250 backedges. 10207 proven. 96267 refuted. 0 times theorem prover too weak. 5920776 trivial. 0 not checked. [2018-12-01 17:39:38,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:39:38,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2018-12-01 17:39:38,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-01 17:39:38,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-01 17:39:38,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2018-12-01 17:39:38,820 INFO L87 Difference]: Start difference. First operand 165 states and 285 transitions. Second operand 36 states. [2018-12-01 17:39:40,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:39:40,024 INFO L93 Difference]: Finished difference Result 503 states and 1468 transitions. [2018-12-01 17:39:40,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-12-01 17:39:40,024 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 9954 [2018-12-01 17:39:40,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:39:40,027 INFO L225 Difference]: With dead ends: 503 [2018-12-01 17:39:40,027 INFO L226 Difference]: Without dead ends: 336 [2018-12-01 17:39:40,030 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10046 GetRequests, 9952 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2549 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1574, Invalid=7546, Unknown=0, NotChecked=0, Total=9120 [2018-12-01 17:39:40,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2018-12-01 17:39:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 249. [2018-12-01 17:39:40,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-12-01 17:39:40,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 388 transitions. [2018-12-01 17:39:40,041 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 388 transitions. Word has length 9954 [2018-12-01 17:39:40,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:39:40,042 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 388 transitions. [2018-12-01 17:39:40,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-01 17:39:40,042 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 388 transitions. [2018-12-01 17:39:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21000 [2018-12-01 17:39:41,181 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:39:41,183 INFO L402 BasicCegarLoop]: trace histogram [3083, 3083, 2494, 1541, 1541, 1541, 1541, 1541, 1541, 1541, 953, 589, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:39:41,183 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:39:41,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:39:41,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1058839668, now seen corresponding path program 16 times [2018-12-01 17:39:41,185 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:39:41,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:39:41,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:39:41,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:39:41,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:39:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:41:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 26858663 backedges. 162918 proven. 86706 refuted. 0 times theorem prover too weak. 26609039 trivial. 0 not checked. [2018-12-01 17:41:15,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:41:15,108 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 17:41:15,115 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 17:41:17,533 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 17:41:17,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:41:17,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:42:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 26858663 backedges. 12919829 proven. 195823 refuted. 0 times theorem prover too weak. 13743011 trivial. 0 not checked. [2018-12-01 17:42:48,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:42:48,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 31] total 37 [2018-12-01 17:42:48,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-12-01 17:42:48,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-12-01 17:42:48,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2018-12-01 17:42:48,472 INFO L87 Difference]: Start difference. First operand 249 states and 388 transitions. Second operand 37 states. [2018-12-01 17:42:49,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:42:49,433 INFO L93 Difference]: Finished difference Result 577 states and 1112 transitions. [2018-12-01 17:42:49,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-01 17:42:49,434 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 20999 [2018-12-01 17:42:49,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:42:49,437 INFO L225 Difference]: With dead ends: 577 [2018-12-01 17:42:49,438 INFO L226 Difference]: Without dead ends: 309 [2018-12-01 17:42:49,440 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21071 GetRequests, 20995 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1149, Invalid=4703, Unknown=0, NotChecked=0, Total=5852 [2018-12-01 17:42:49,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-12-01 17:42:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 188. [2018-12-01 17:42:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-12-01 17:42:49,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 213 transitions. [2018-12-01 17:42:49,450 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 213 transitions. Word has length 20999 [2018-12-01 17:42:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:42:49,452 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 213 transitions. [2018-12-01 17:42:49,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-12-01 17:42:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 213 transitions. [2018-12-01 17:42:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13442 [2018-12-01 17:42:49,927 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:42:49,929 INFO L402 BasicCegarLoop]: trace histogram [1973, 1973, 1596, 986, 986, 986, 986, 986, 986, 986, 610, 377, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:42:49,929 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:42:49,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:42:49,930 INFO L82 PathProgramCache]: Analyzing trace with hash -982105371, now seen corresponding path program 17 times [2018-12-01 17:42:49,930 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:42:49,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:42:49,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:42:49,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:42:49,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:42:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:44:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10996742 backedges. 0 proven. 3626247 refuted. 0 times theorem prover too weak. 7370495 trivial. 0 not checked. [2018-12-01 17:44:31,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:44:31,659 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 17:44:31,666 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 17:49:58,874 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1640 check-sat command(s) [2018-12-01 17:49:58,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:49:59,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:51:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10996742 backedges. 0 proven. 3626247 refuted. 0 times theorem prover too weak. 7370495 trivial. 0 not checked. [2018-12-01 17:51:33,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:51:33,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 60 [2018-12-01 17:51:33,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-12-01 17:51:33,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-12-01 17:51:33,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2018-12-01 17:51:33,349 INFO L87 Difference]: Start difference. First operand 188 states and 213 transitions. Second operand 60 states. [2018-12-01 17:51:34,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:51:34,027 INFO L93 Difference]: Finished difference Result 188 states and 213 transitions. [2018-12-01 17:51:34,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-12-01 17:51:34,027 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 13441 [2018-12-01 17:51:34,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:51:34,032 INFO L225 Difference]: With dead ends: 188 [2018-12-01 17:51:34,032 INFO L226 Difference]: Without dead ends: 0 [2018-12-01 17:51:34,033 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17389 GetRequests, 16344 SyntacticMatches, 987 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2018-12-01 17:51:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-01 17:51:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-01 17:51:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-01 17:51:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-01 17:51:34,033 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13441 [2018-12-01 17:51:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:51:34,034 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 17:51:34,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-12-01 17:51:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-01 17:51:34,034 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-01 17:51:34,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-01 17:51:34,176 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-01 17:51:35,843 WARN L180 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 338 DAG size of output: 129 [2018-12-01 17:51:36,111 WARN L180 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 8 [2018-12-01 17:51:36,112 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-01 17:51:36,112 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-01 17:51:36,112 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-01 17:51:36,112 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-01 17:51:36,112 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-01 17:51:36,113 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-01 17:51:36,113 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-12-01 17:51:36,113 INFO L448 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-12-01 17:51:36,113 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-12-01 17:51:36,113 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= 15 main_~x~0) (<= main_~x~0 15)) [2018-12-01 17:51:36,113 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-12-01 17:51:36,113 INFO L448 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-12-01 17:51:36,113 INFO L448 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-12-01 17:51:36,113 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-12-01 17:51:36,113 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-12-01 17:51:36,113 INFO L448 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-12-01 17:51:36,114 INFO L448 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-12-01 17:51:36,114 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2018-12-01 17:51:36,114 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-12-01 17:51:36,114 INFO L444 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse0 (<= fibo_~n |fibo_#in~n|)) (.cse1 (<= |fibo_#in~n| fibo_~n)) (.cse2 (< |fibo_#in~n| 5)) (.cse3 (<= |fibo_#t~ret0| 1)) (.cse4 (<= 1 |fibo_#t~ret0|))) (and (or (<= |fibo_#in~n| 12) (and (<= |fibo_#t~ret0| 144) (<= 144 |fibo_#t~ret0|)) (<= 14 |fibo_#in~n|)) (or (and (<= |fibo_#t~ret0| 13) (<= 13 |fibo_#t~ret0|)) (or (< |fibo_#in~n| 8) (< 8 |fibo_#in~n|))) (or (and (<= 89 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 89)) (< |fibo_#in~n| 12) (< 12 |fibo_#in~n|)) (or (or (< |fibo_#in~n| 7) (< 7 |fibo_#in~n|)) (and (<= |fibo_#t~ret0| 8) (<= 8 |fibo_#t~ret0|))) (or (and (<= 55 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 55)) (or (< |fibo_#in~n| 11) (< 11 |fibo_#in~n|))) (or (<= 10 |fibo_#in~n|) (and (<= |fibo_#t~ret0| 21) (<= 21 |fibo_#t~ret0|)) (<= |fibo_#in~n| 8)) (or (<= 11 |fibo_#in~n|) (<= fibo_~n 9) (and (<= 34 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 34))) (or (and (<= 233 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 233)) (<= 15 |fibo_#in~n|) (< |fibo_#in~n| 14)) (or (and (<= 7 |fibo_#in~n|) .cse0 .cse1) (and .cse0 (<= |fibo_#in~n| 5) (<= 5 fibo_~n)) .cse2 (and (<= |fibo_#t~ret0| 5) (<= 5 |fibo_#t~ret0|) (<= fibo_~n 6) .cse1)) (or (and (<= |fibo_#in~n| 2) .cse0 (< 1 fibo_~n)) (<= 4 |fibo_#in~n|) (and (<= 3 |fibo_#in~n|) .cse0 .cse1 .cse3 .cse4)) (or (and (<= fibo_~n 4) .cse1 (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) (or (< 4 |fibo_#in~n|) (< |fibo_#in~n| 4))) (or (or (< 5 |fibo_#in~n|) .cse2) (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3))) (or (and .cse3 .cse4) (< 2 |fibo_#in~n|)) (or (<= 16 |fibo_#in~n|) (< |fibo_#in~n| 15) (and (<= 377 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 377))))) [2018-12-01 17:51:36,114 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-12-01 17:51:36,114 INFO L448 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-12-01 17:51:36,114 INFO L448 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-12-01 17:51:36,115 INFO L451 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-12-01 17:51:36,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 05:51:36 BoogieIcfgContainer [2018-12-01 17:51:36,117 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 17:51:36,117 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 17:51:36,117 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 17:51:36,117 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 17:51:36,118 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 05:38:28" (3/4) ... [2018-12-01 17:51:36,121 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-01 17:51:36,127 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-01 17:51:36,128 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-01 17:51:36,128 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-12-01 17:51:36,131 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-01 17:51:36,131 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-01 17:51:36,131 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-01 17:51:36,156 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8667c51f-b00e-4d73-9760-f9eb3be72509/bin-2019/uautomizer/witness.graphml [2018-12-01 17:51:36,156 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 17:51:36,157 INFO L168 Benchmark]: Toolchain (without parser) took 787703.18 ms. Allocated memory was 1.0 GB in the beginning and 5.9 GB in the end (delta: 4.9 GB). Free memory was 957.1 MB in the beginning and 2.3 GB in the end (delta: -1.4 GB). Peak memory consumption was 3.5 GB. Max. memory is 11.5 GB. [2018-12-01 17:51:36,157 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 17:51:36,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 114.26 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 945.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-12-01 17:51:36,158 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.68 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 17:51:36,158 INFO L168 Benchmark]: Boogie Preprocessor took 10.63 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 17:51:36,158 INFO L168 Benchmark]: RCFGBuilder took 138.96 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -137.6 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-01 17:51:36,158 INFO L168 Benchmark]: TraceAbstraction took 787386.08 ms. Allocated memory was 1.1 GB in the beginning and 5.9 GB in the end (delta: 4.8 GB). Free memory was 1.1 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 3.5 GB. Max. memory is 11.5 GB. [2018-12-01 17:51:36,159 INFO L168 Benchmark]: Witness Printer took 38.77 ms. Allocated memory is still 5.9 GB. Free memory is still 2.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 17:51:36,160 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 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 114.26 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 945.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.68 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.63 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 138.96 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -137.6 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 787386.08 ms. Allocated memory was 1.1 GB in the beginning and 5.9 GB in the end (delta: 4.8 GB). Free memory was 1.1 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 3.5 GB. Max. memory is 11.5 GB. * Witness Printer took 38.77 ms. Allocated memory is still 5.9 GB. Free memory is still 2.3 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 787.3s OverallTime, 20 OverallIterations, 3083 TraceHistogramMax, 6.0s AutomataDifference, 0.0s DeadEndRemovalTime, 2.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 558 SDtfs, 2102 SDslu, 4716 SDs, 0 SdLazy, 8426 SolverSat, 2631 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62993 GetRequests, 61421 SyntacticMatches, 990 SemanticMatches, 582 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7197 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=249occurred in iteration=18, 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, 20 MinimizatonAttempts, 303 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 587 PreInvPairs, 967 NumberOfFragments, 283 HoareAnnotationTreeSize, 587 FomulaSimplifications, 6466 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 16704 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 1.4s SsaConstructionTime, 334.0s SatisfiabilityAnalysisTime, 236.7s InterpolantComputationTime, 117003 NumberOfCodeBlocks, 101672 NumberOfCodeBlocksAsserted, 1942 NumberOfCheckSat, 116965 ConstructedInterpolants, 0 QuantifiedInterpolants, 2792633045 SizeOfPredicates, 161 NumberOfNonLiveVariables, 93300 ConjunctsInSsa, 8218 ConjunctsInUnsatCore, 38 InterpolantComputations, 2 PerfectInterpolantSequences, 84878256/92768670 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...