./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_10_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_10_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/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 f26efe6943beb9bd444f2fe65e72a92241f10e89 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 01:13:20,976 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 01:13:20,977 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 01:13:20,985 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 01:13:20,985 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 01:13:20,986 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 01:13:20,987 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 01:13:20,988 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 01:13:20,989 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 01:13:20,990 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 01:13:20,991 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 01:13:20,991 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 01:13:20,991 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 01:13:20,992 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 01:13:20,993 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 01:13:20,994 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 01:13:20,994 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 01:13:20,995 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 01:13:20,997 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 01:13:20,998 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 01:13:20,999 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 01:13:21,000 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 01:13:21,001 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 01:13:21,001 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 01:13:21,002 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 01:13:21,002 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 01:13:21,003 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 01:13:21,004 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 01:13:21,004 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 01:13:21,005 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 01:13:21,005 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 01:13:21,006 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 01:13:21,006 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 01:13:21,006 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 01:13:21,007 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 01:13:21,007 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 01:13:21,007 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 01:13:21,018 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 01:13:21,018 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 01:13:21,019 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 01:13:21,019 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 01:13:21,019 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 01:13:21,019 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 01:13:21,020 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 01:13:21,020 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 01:13:21,020 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 01:13:21,020 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 01:13:21,020 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 01:13:21,020 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 01:13:21,021 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 01:13:21,021 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 01:13:21,021 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 01:13:21,021 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 01:13:21,021 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 01:13:21,021 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 01:13:21,021 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 01:13:21,021 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 01:13:21,022 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 01:13:21,022 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 01:13:21,022 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 01:13:21,022 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 01:13:21,022 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 01:13:21,022 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 01:13:21,022 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 01:13:21,022 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 01:13:21,022 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 01:13:21,022 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 01:13:21,023 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_b1107f0d-9f26-4fc3-b21f-54624125b6e2/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 -> f26efe6943beb9bd444f2fe65e72a92241f10e89 [2018-11-23 01:13:21,047 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 01:13:21,055 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 01:13:21,058 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 01:13:21,059 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 01:13:21,059 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 01:13:21,060 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_10_true-unreach-call.c [2018-11-23 01:13:21,102 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/data/00aa73cc6/8cd0ac82531940238f2ec76db5569b18/FLAGd132a44fb [2018-11-23 01:13:21,447 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 01:13:21,448 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/sv-benchmarks/c/recursive-simple/fibo_2calls_10_true-unreach-call.c [2018-11-23 01:13:21,452 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/data/00aa73cc6/8cd0ac82531940238f2ec76db5569b18/FLAGd132a44fb [2018-11-23 01:13:21,874 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/data/00aa73cc6/8cd0ac82531940238f2ec76db5569b18 [2018-11-23 01:13:21,877 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 01:13:21,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 01:13:21,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 01:13:21,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 01:13:21,883 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 01:13:21,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:13:21" (1/1) ... [2018-11-23 01:13:21,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e5f2ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:13:21, skipping insertion in model container [2018-11-23 01:13:21,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:13:21" (1/1) ... [2018-11-23 01:13:21,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 01:13:21,906 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 01:13:22,027 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 01:13:22,029 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 01:13:22,040 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 01:13:22,049 INFO L195 MainTranslator]: Completed translation [2018-11-23 01:13:22,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:13:22 WrapperNode [2018-11-23 01:13:22,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 01:13:22,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 01:13:22,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 01:13:22,050 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 01:13:22,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:13:22" (1/1) ... [2018-11-23 01:13:22,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:13:22" (1/1) ... [2018-11-23 01:13:22,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 01:13:22,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 01:13:22,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 01:13:22,065 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 01:13:22,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:13:22" (1/1) ... [2018-11-23 01:13:22,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:13:22" (1/1) ... [2018-11-23 01:13:22,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:13:22" (1/1) ... [2018-11-23 01:13:22,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:13:22" (1/1) ... [2018-11-23 01:13:22,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:13:22" (1/1) ... [2018-11-23 01:13:22,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:13:22" (1/1) ... [2018-11-23 01:13:22,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:13:22" (1/1) ... [2018-11-23 01:13:22,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 01:13:22,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 01:13:22,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 01:13:22,084 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 01:13:22,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:13:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 01:13:22,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 01:13:22,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 01:13:22,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 01:13:22,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 01:13:22,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 01:13:22,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 01:13:22,176 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-23 01:13:22,176 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-23 01:13:22,176 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-23 01:13:22,176 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-23 01:13:22,344 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 01:13:22,344 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 01:13:22,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:13:22 BoogieIcfgContainer [2018-11-23 01:13:22,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 01:13:22,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 01:13:22,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 01:13:22,349 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 01:13:22,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:13:21" (1/3) ... [2018-11-23 01:13:22,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2090c7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:13:22, skipping insertion in model container [2018-11-23 01:13:22,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:13:22" (2/3) ... [2018-11-23 01:13:22,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2090c7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:13:22, skipping insertion in model container [2018-11-23 01:13:22,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:13:22" (3/3) ... [2018-11-23 01:13:22,353 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_10_true-unreach-call.c [2018-11-23 01:13:22,364 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 01:13:22,371 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 01:13:22,386 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 01:13:22,417 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 01:13:22,418 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 01:13:22,418 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 01:13:22,418 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 01:13:22,418 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 01:13:22,418 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 01:13:22,418 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 01:13:22,418 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 01:13:22,419 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 01:13:22,435 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-23 01:13:22,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 01:13:22,441 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:22,441 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:22,443 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:22,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:22,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-23 01:13:22,450 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:22,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:22,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:22,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:22,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 01:13:22,620 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 01:13:22,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 01:13:22,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 01:13:22,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 01:13:22,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 01:13:22,640 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-23 01:13:22,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:22,718 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-23 01:13:22,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 01:13:22,720 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-23 01:13:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:22,727 INFO L225 Difference]: With dead ends: 44 [2018-11-23 01:13:22,727 INFO L226 Difference]: Without dead ends: 30 [2018-11-23 01:13:22,729 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 [2018-11-23 01:13:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-23 01:13:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-23 01:13:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 01:13:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-23 01:13:22,764 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-23 01:13:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:22,764 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-23 01:13:22,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 01:13:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-23 01:13:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 01:13:22,766 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:22,766 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:22,766 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:22,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:22,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-23 01:13:22,766 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:22,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:22,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:22,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:22,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 01:13:22,814 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 01:13:22,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 01:13:22,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 01:13:22,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 01:13:22,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 01:13:22,817 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-23 01:13:22,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:22,892 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-23 01:13:22,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 01:13:22,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-23 01:13:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:22,894 INFO L225 Difference]: With dead ends: 36 [2018-11-23 01:13:22,894 INFO L226 Difference]: Without dead ends: 32 [2018-11-23 01:13:22,895 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 [2018-11-23 01:13:22,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-23 01:13:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-23 01:13:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 01:13:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-23 01:13:22,901 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-23 01:13:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:22,902 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-23 01:13:22,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 01:13:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-23 01:13:22,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-23 01:13:22,903 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:22,904 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:22,904 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:22,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:22,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-23 01:13:22,904 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:22,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:22,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:22,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:22,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 01:13:22,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:22,991 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:23,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:23,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 01:13:23,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:23,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-23 01:13:23,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 01:13:23,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 01:13:23,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-23 01:13:23,095 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-11-23 01:13:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:23,248 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-11-23 01:13:23,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 01:13:23,249 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-11-23 01:13:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:23,250 INFO L225 Difference]: With dead ends: 58 [2018-11-23 01:13:23,251 INFO L226 Difference]: Without dead ends: 34 [2018-11-23 01:13:23,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-23 01:13:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-23 01:13:23,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-23 01:13:23,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-23 01:13:23,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-23 01:13:23,260 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-11-23 01:13:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:23,261 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-23 01:13:23,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 01:13:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-23 01:13:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-23 01:13:23,262 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:23,262 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:23,263 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:23,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:23,263 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-23 01:13:23,263 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:23,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:23,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:23,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:23,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 01:13:23,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:23,340 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:23,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:23,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 01:13:23,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:23,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-23 01:13:23,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 01:13:23,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 01:13:23,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 01:13:23,397 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-11-23 01:13:23,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:23,498 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-11-23 01:13:23,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 01:13:23,499 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-23 01:13:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:23,500 INFO L225 Difference]: With dead ends: 43 [2018-11-23 01:13:23,500 INFO L226 Difference]: Without dead ends: 39 [2018-11-23 01:13:23,501 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-23 01:13:23,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-23 01:13:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-23 01:13:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-23 01:13:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-11-23 01:13:23,509 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-11-23 01:13:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:23,509 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-11-23 01:13:23,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 01:13:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-11-23 01:13:23,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-23 01:13:23,511 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:23,511 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:23,512 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:23,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:23,512 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-23 01:13:23,512 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:23,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:23,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:23,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:23,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-23 01:13:23,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:23,570 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:23,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:23,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 01:13:23,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:23,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-11-23 01:13:23,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 01:13:23,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 01:13:23,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-23 01:13:23,683 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-11-23 01:13:23,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:23,862 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-11-23 01:13:23,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 01:13:23,863 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-11-23 01:13:23,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:23,864 INFO L225 Difference]: With dead ends: 70 [2018-11-23 01:13:23,864 INFO L226 Difference]: Without dead ends: 39 [2018-11-23 01:13:23,865 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-11-23 01:13:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-23 01:13:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-23 01:13:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-23 01:13:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-11-23 01:13:23,870 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-11-23 01:13:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:23,871 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-11-23 01:13:23,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 01:13:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-11-23 01:13:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-23 01:13:23,871 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:23,872 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:23,872 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:23,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-11-23 01:13:23,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:23,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:23,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:23,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:23,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-23 01:13:23,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:23,910 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:23,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:23,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-23 01:13:23,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:23,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-11-23 01:13:23,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 01:13:23,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 01:13:23,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-23 01:13:23,975 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-11-23 01:13:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:24,085 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-11-23 01:13:24,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 01:13:24,086 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-11-23 01:13:24,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:24,087 INFO L225 Difference]: With dead ends: 61 [2018-11-23 01:13:24,087 INFO L226 Difference]: Without dead ends: 57 [2018-11-23 01:13:24,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-23 01:13:24,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-23 01:13:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-11-23 01:13:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-23 01:13:24,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-11-23 01:13:24,096 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-11-23 01:13:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:24,096 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-11-23 01:13:24,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 01:13:24,097 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-11-23 01:13:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-23 01:13:24,099 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:24,100 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:24,100 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:24,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:24,100 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-11-23 01:13:24,100 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:24,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:24,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:24,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:24,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-23 01:13:24,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:24,159 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:24,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:24,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-23 01:13:24,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:24,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-11-23 01:13:24,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 01:13:24,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 01:13:24,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-23 01:13:24,266 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-11-23 01:13:24,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:24,392 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-11-23 01:13:24,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 01:13:24,393 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-11-23 01:13:24,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:24,395 INFO L225 Difference]: With dead ends: 71 [2018-11-23 01:13:24,395 INFO L226 Difference]: Without dead ends: 67 [2018-11-23 01:13:24,396 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-23 01:13:24,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-23 01:13:24,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-11-23 01:13:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-23 01:13:24,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-11-23 01:13:24,407 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-11-23 01:13:24,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:24,408 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-11-23 01:13:24,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 01:13:24,408 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-11-23 01:13:24,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-23 01:13:24,410 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:24,411 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:24,412 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:24,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:24,412 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-11-23 01:13:24,412 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:24,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:24,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:24,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:24,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-23 01:13:24,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:24,500 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:24,509 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 01:13:24,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 01:13:24,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:13:24,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-11-23 01:13:24,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:24,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2018-11-23 01:13:24,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 01:13:24,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 01:13:24,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-11-23 01:13:24,627 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 16 states. [2018-11-23 01:13:24,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:24,998 INFO L93 Difference]: Finished difference Result 146 states and 299 transitions. [2018-11-23 01:13:24,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 01:13:24,999 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2018-11-23 01:13:24,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:25,001 INFO L225 Difference]: With dead ends: 146 [2018-11-23 01:13:25,001 INFO L226 Difference]: Without dead ends: 103 [2018-11-23 01:13:25,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2018-11-23 01:13:25,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-23 01:13:25,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2018-11-23 01:13:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-23 01:13:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 157 transitions. [2018-11-23 01:13:25,017 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 157 transitions. Word has length 80 [2018-11-23 01:13:25,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:25,017 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 157 transitions. [2018-11-23 01:13:25,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 01:13:25,017 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 157 transitions. [2018-11-23 01:13:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-11-23 01:13:25,020 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:25,020 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:25,020 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:25,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:25,020 INFO L82 PathProgramCache]: Analyzing trace with hash -593756845, now seen corresponding path program 1 times [2018-11-23 01:13:25,020 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:25,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:25,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:25,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:13:25,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 70 proven. 133 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-11-23 01:13:25,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:25,151 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:25,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:25,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 33 proven. 204 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-23 01:13:25,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:25,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2018-11-23 01:13:25,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 01:13:25,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 01:13:25,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-11-23 01:13:25,359 INFO L87 Difference]: Start difference. First operand 87 states and 157 transitions. Second operand 18 states. [2018-11-23 01:13:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:25,894 INFO L93 Difference]: Finished difference Result 232 states and 520 transitions. [2018-11-23 01:13:25,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-23 01:13:25,895 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 149 [2018-11-23 01:13:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:25,897 INFO L225 Difference]: With dead ends: 232 [2018-11-23 01:13:25,897 INFO L226 Difference]: Without dead ends: 129 [2018-11-23 01:13:25,898 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2018-11-23 01:13:25,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-11-23 01:13:25,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 118. [2018-11-23 01:13:25,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-11-23 01:13:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 184 transitions. [2018-11-23 01:13:25,916 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 184 transitions. Word has length 149 [2018-11-23 01:13:25,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:25,917 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 184 transitions. [2018-11-23 01:13:25,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 01:13:25,917 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 184 transitions. [2018-11-23 01:13:25,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-11-23 01:13:25,924 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:25,924 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 26, 26, 26, 23, 20, 20, 20, 20, 20, 20, 20, 18, 13, 13, 13, 13, 13, 13, 13, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:25,924 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:25,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:25,924 INFO L82 PathProgramCache]: Analyzing trace with hash -100353676, now seen corresponding path program 1 times [2018-11-23 01:13:25,925 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:25,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:25,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:25,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:25,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6230 backedges. 179 proven. 708 refuted. 0 times theorem prover too weak. 5343 trivial. 0 not checked. [2018-11-23 01:13:26,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:26,141 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:26,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:26,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6230 backedges. 133 proven. 1023 refuted. 0 times theorem prover too weak. 5074 trivial. 0 not checked. [2018-11-23 01:13:26,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:26,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 18 [2018-11-23 01:13:26,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 01:13:26,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 01:13:26,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-11-23 01:13:26,454 INFO L87 Difference]: Start difference. First operand 118 states and 184 transitions. Second operand 18 states. [2018-11-23 01:13:26,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:26,970 INFO L93 Difference]: Finished difference Result 290 states and 587 transitions. [2018-11-23 01:13:26,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-23 01:13:26,971 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 458 [2018-11-23 01:13:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:26,973 INFO L225 Difference]: With dead ends: 290 [2018-11-23 01:13:26,973 INFO L226 Difference]: Without dead ends: 179 [2018-11-23 01:13:26,974 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2018-11-23 01:13:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-11-23 01:13:26,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 154. [2018-11-23 01:13:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-11-23 01:13:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 252 transitions. [2018-11-23 01:13:26,993 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 252 transitions. Word has length 458 [2018-11-23 01:13:26,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:26,994 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 252 transitions. [2018-11-23 01:13:26,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 01:13:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 252 transitions. [2018-11-23 01:13:27,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-11-23 01:13:27,003 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:27,003 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 25, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 11, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:27,003 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:27,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:27,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1387580488, now seen corresponding path program 2 times [2018-11-23 01:13:27,004 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:27,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:27,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:27,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:27,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4709 backedges. 509 proven. 399 refuted. 0 times theorem prover too weak. 3801 trivial. 0 not checked. [2018-11-23 01:13:27,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:27,246 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:27,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 01:13:27,317 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 01:13:27,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:13:27,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4709 backedges. 159 proven. 968 refuted. 0 times theorem prover too weak. 3582 trivial. 0 not checked. [2018-11-23 01:13:27,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:27,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2018-11-23 01:13:27,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-23 01:13:27,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-23 01:13:27,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2018-11-23 01:13:27,538 INFO L87 Difference]: Start difference. First operand 154 states and 252 transitions. Second operand 21 states. [2018-11-23 01:13:28,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:28,128 INFO L93 Difference]: Finished difference Result 324 states and 658 transitions. [2018-11-23 01:13:28,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-23 01:13:28,129 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 409 [2018-11-23 01:13:28,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:28,131 INFO L225 Difference]: With dead ends: 324 [2018-11-23 01:13:28,131 INFO L226 Difference]: Without dead ends: 182 [2018-11-23 01:13:28,132 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=1812, Unknown=0, NotChecked=0, Total=2162 [2018-11-23 01:13:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-11-23 01:13:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 157. [2018-11-23 01:13:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-11-23 01:13:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 272 transitions. [2018-11-23 01:13:28,149 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 272 transitions. Word has length 409 [2018-11-23 01:13:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:28,149 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 272 transitions. [2018-11-23 01:13:28,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-23 01:13:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 272 transitions. [2018-11-23 01:13:28,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2018-11-23 01:13:28,153 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:28,153 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 28, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 10, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:28,153 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:28,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:28,154 INFO L82 PathProgramCache]: Analyzing trace with hash 670646700, now seen corresponding path program 3 times [2018-11-23 01:13:28,154 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:28,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:28,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:28,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:13:28,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 330 proven. 1065 refuted. 0 times theorem prover too weak. 5425 trivial. 0 not checked. [2018-11-23 01:13:28,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:28,367 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:28,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 01:13:28,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-11-23 01:13:28,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:13:28,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 1886 proven. 34 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2018-11-23 01:13:28,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:28,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2018-11-23 01:13:28,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-23 01:13:28,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-23 01:13:28,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-11-23 01:13:28,585 INFO L87 Difference]: Start difference. First operand 157 states and 272 transitions. Second operand 17 states. [2018-11-23 01:13:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:28,934 INFO L93 Difference]: Finished difference Result 348 states and 687 transitions. [2018-11-23 01:13:28,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-23 01:13:28,935 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 489 [2018-11-23 01:13:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:28,937 INFO L225 Difference]: With dead ends: 348 [2018-11-23 01:13:28,937 INFO L226 Difference]: Without dead ends: 199 [2018-11-23 01:13:28,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2018-11-23 01:13:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-11-23 01:13:28,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2018-11-23 01:13:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-11-23 01:13:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 325 transitions. [2018-11-23 01:13:28,954 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 325 transitions. Word has length 489 [2018-11-23 01:13:28,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:28,955 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 325 transitions. [2018-11-23 01:13:28,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-23 01:13:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 325 transitions. [2018-11-23 01:13:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2018-11-23 01:13:28,959 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:28,960 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 45, 45, 40, 37, 25, 25, 25, 25, 25, 25, 25, 22, 22, 22, 22, 22, 22, 22, 18, 12, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:28,960 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:28,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:28,960 INFO L82 PathProgramCache]: Analyzing trace with hash -120891934, now seen corresponding path program 4 times [2018-11-23 01:13:28,960 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:28,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:28,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:28,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:13:28,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12430 backedges. 418 proven. 1847 refuted. 0 times theorem prover too weak. 10165 trivial. 0 not checked. [2018-11-23 01:13:29,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:29,359 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:29,367 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 01:13:29,451 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 01:13:29,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:13:29,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12430 backedges. 249 proven. 1899 refuted. 0 times theorem prover too weak. 10282 trivial. 0 not checked. [2018-11-23 01:13:29,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:29,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 24 [2018-11-23 01:13:29,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-23 01:13:29,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-23 01:13:29,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2018-11-23 01:13:29,740 INFO L87 Difference]: Start difference. First operand 196 states and 325 transitions. Second operand 24 states. [2018-11-23 01:13:30,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:30,695 INFO L93 Difference]: Finished difference Result 450 states and 929 transitions. [2018-11-23 01:13:30,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-23 01:13:30,696 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 654 [2018-11-23 01:13:30,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:30,699 INFO L225 Difference]: With dead ends: 450 [2018-11-23 01:13:30,699 INFO L226 Difference]: Without dead ends: 259 [2018-11-23 01:13:30,702 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 650 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=538, Invalid=3122, Unknown=0, NotChecked=0, Total=3660 [2018-11-23 01:13:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-11-23 01:13:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 227. [2018-11-23 01:13:30,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-11-23 01:13:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 375 transitions. [2018-11-23 01:13:30,722 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 375 transitions. Word has length 654 [2018-11-23 01:13:30,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:30,722 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 375 transitions. [2018-11-23 01:13:30,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-23 01:13:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 375 transitions. [2018-11-23 01:13:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1302 [2018-11-23 01:13:30,734 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:30,735 INFO L402 BasicCegarLoop]: trace histogram [100, 100, 89, 89, 81, 79, 50, 50, 50, 50, 50, 50, 50, 44, 44, 44, 44, 44, 44, 44, 37, 29, 19, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:30,735 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:30,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:30,735 INFO L82 PathProgramCache]: Analyzing trace with hash 345976913, now seen corresponding path program 5 times [2018-11-23 01:13:30,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:30,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:30,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:30,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:13:30,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 50469 backedges. 670 proven. 2179 refuted. 0 times theorem prover too weak. 47620 trivial. 0 not checked. [2018-11-23 01:13:31,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:31,425 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:31,432 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 01:13:31,493 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 01:13:31,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:13:31,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 50469 backedges. 7411 proven. 4 refuted. 0 times theorem prover too weak. 43054 trivial. 0 not checked. [2018-11-23 01:13:32,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:32,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-23 01:13:32,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 01:13:32,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 01:13:32,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 01:13:32,027 INFO L87 Difference]: Start difference. First operand 227 states and 375 transitions. Second operand 7 states. [2018-11-23 01:13:32,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:32,121 INFO L93 Difference]: Finished difference Result 436 states and 771 transitions. [2018-11-23 01:13:32,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 01:13:32,122 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1301 [2018-11-23 01:13:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:32,126 INFO L225 Difference]: With dead ends: 436 [2018-11-23 01:13:32,126 INFO L226 Difference]: Without dead ends: 226 [2018-11-23 01:13:32,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1311 GetRequests, 1302 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-11-23 01:13:32,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-11-23 01:13:32,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-11-23 01:13:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-11-23 01:13:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 373 transitions. [2018-11-23 01:13:32,148 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 373 transitions. Word has length 1301 [2018-11-23 01:13:32,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:32,149 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 373 transitions. [2018-11-23 01:13:32,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 01:13:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 373 transitions. [2018-11-23 01:13:32,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 953 [2018-11-23 01:13:32,160 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:32,160 INFO L402 BasicCegarLoop]: trace histogram [74, 74, 65, 65, 58, 53, 37, 37, 37, 37, 37, 37, 37, 32, 32, 32, 32, 32, 32, 32, 21, 21, 21, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:32,161 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:32,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:32,161 INFO L82 PathProgramCache]: Analyzing trace with hash 674142206, now seen corresponding path program 6 times [2018-11-23 01:13:32,161 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:32,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:32,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:32,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:13:32,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 26803 backedges. 640 proven. 2480 refuted. 0 times theorem prover too weak. 23683 trivial. 0 not checked. [2018-11-23 01:13:32,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:32,738 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:32,747 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 01:13:32,822 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-11-23 01:13:32,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:13:32,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 26803 backedges. 4144 proven. 34 refuted. 0 times theorem prover too weak. 22625 trivial. 0 not checked. [2018-11-23 01:13:33,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:33,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2018-11-23 01:13:33,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-23 01:13:33,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-23 01:13:33,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-11-23 01:13:33,157 INFO L87 Difference]: Start difference. First operand 226 states and 373 transitions. Second operand 17 states. [2018-11-23 01:13:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:33,501 INFO L93 Difference]: Finished difference Result 457 states and 812 transitions. [2018-11-23 01:13:33,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-23 01:13:33,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 952 [2018-11-23 01:13:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:33,507 INFO L225 Difference]: With dead ends: 457 [2018-11-23 01:13:33,507 INFO L226 Difference]: Without dead ends: 249 [2018-11-23 01:13:33,509 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 951 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2018-11-23 01:13:33,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-11-23 01:13:33,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 242. [2018-11-23 01:13:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-11-23 01:13:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 395 transitions. [2018-11-23 01:13:33,530 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 395 transitions. Word has length 952 [2018-11-23 01:13:33,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:33,531 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 395 transitions. [2018-11-23 01:13:33,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-23 01:13:33,531 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 395 transitions. [2018-11-23 01:13:33,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2018-11-23 01:13:33,538 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:33,538 INFO L402 BasicCegarLoop]: trace histogram [69, 69, 66, 66, 57, 53, 34, 34, 34, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 24, 19, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:33,538 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:33,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:33,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2059738804, now seen corresponding path program 7 times [2018-11-23 01:13:33,539 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:33,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:33,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:33,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:13:33,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 25294 backedges. 671 proven. 2851 refuted. 0 times theorem prover too weak. 21772 trivial. 0 not checked. [2018-11-23 01:13:34,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:34,154 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:34,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:34,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 25294 backedges. 602 proven. 2217 refuted. 0 times theorem prover too weak. 22475 trivial. 0 not checked. [2018-11-23 01:13:34,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:34,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 23 [2018-11-23 01:13:34,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-23 01:13:34,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-23 01:13:34,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2018-11-23 01:13:34,649 INFO L87 Difference]: Start difference. First operand 242 states and 395 transitions. Second operand 23 states. [2018-11-23 01:13:35,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:35,420 INFO L93 Difference]: Finished difference Result 536 states and 943 transitions. [2018-11-23 01:13:35,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-23 01:13:35,421 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 927 [2018-11-23 01:13:35,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:35,425 INFO L225 Difference]: With dead ends: 536 [2018-11-23 01:13:35,425 INFO L226 Difference]: Without dead ends: 312 [2018-11-23 01:13:35,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 924 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=2437, Unknown=0, NotChecked=0, Total=2862 [2018-11-23 01:13:35,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-11-23 01:13:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 283. [2018-11-23 01:13:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-11-23 01:13:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 466 transitions. [2018-11-23 01:13:35,452 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 466 transitions. Word has length 927 [2018-11-23 01:13:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:35,452 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 466 transitions. [2018-11-23 01:13:35,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-23 01:13:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 466 transitions. [2018-11-23 01:13:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1417 [2018-11-23 01:13:35,465 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:35,466 INFO L402 BasicCegarLoop]: trace histogram [106, 106, 101, 101, 84, 83, 53, 53, 53, 53, 53, 53, 53, 50, 50, 50, 50, 50, 50, 50, 34, 30, 22, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:35,466 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:35,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:35,467 INFO L82 PathProgramCache]: Analyzing trace with hash -185476162, now seen corresponding path program 8 times [2018-11-23 01:13:35,467 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:35,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:35,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:35,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:35,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 59761 backedges. 3078 proven. 2084 refuted. 0 times theorem prover too weak. 54599 trivial. 0 not checked. [2018-11-23 01:13:36,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:36,458 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/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 [2018-11-23 01:13:36,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 01:13:36,701 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 01:13:36,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:13:36,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 59761 backedges. 1663 proven. 2187 refuted. 0 times theorem prover too weak. 55911 trivial. 0 not checked. [2018-11-23 01:13:37,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:37,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2018-11-23 01:13:37,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-23 01:13:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-23 01:13:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2018-11-23 01:13:37,687 INFO L87 Difference]: Start difference. First operand 283 states and 466 transitions. Second operand 27 states. [2018-11-23 01:13:38,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:38,765 INFO L93 Difference]: Finished difference Result 650 states and 1191 transitions. [2018-11-23 01:13:38,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-11-23 01:13:38,766 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 1416 [2018-11-23 01:13:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:38,771 INFO L225 Difference]: With dead ends: 650 [2018-11-23 01:13:38,771 INFO L226 Difference]: Without dead ends: 385 [2018-11-23 01:13:38,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1480 GetRequests, 1413 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=580, Invalid=4112, Unknown=0, NotChecked=0, Total=4692 [2018-11-23 01:13:38,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2018-11-23 01:13:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 286. [2018-11-23 01:13:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-11-23 01:13:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 470 transitions. [2018-11-23 01:13:38,792 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 470 transitions. Word has length 1416 [2018-11-23 01:13:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:38,793 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 470 transitions. [2018-11-23 01:13:38,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-23 01:13:38,794 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 470 transitions. [2018-11-23 01:13:38,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 995 [2018-11-23 01:13:38,799 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:38,800 INFO L402 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 59, 58, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 23, 22, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:38,800 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:38,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:38,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1762690153, now seen corresponding path program 9 times [2018-11-23 01:13:38,801 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:38,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:38,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:38,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:13:38,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 29140 backedges. 764 proven. 3200 refuted. 0 times theorem prover too weak. 25176 trivial. 0 not checked. [2018-11-23 01:13:39,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:39,251 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/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 [2018-11-23 01:13:39,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 01:13:39,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-11-23 01:13:39,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:13:39,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 29140 backedges. 8065 proven. 145 refuted. 0 times theorem prover too weak. 20930 trivial. 0 not checked. [2018-11-23 01:13:39,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:39,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 25 [2018-11-23 01:13:39,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-23 01:13:39,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-23 01:13:39,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2018-11-23 01:13:39,762 INFO L87 Difference]: Start difference. First operand 286 states and 470 transitions. Second operand 25 states. [2018-11-23 01:13:40,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:40,466 INFO L93 Difference]: Finished difference Result 618 states and 1077 transitions. [2018-11-23 01:13:40,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-23 01:13:40,467 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 994 [2018-11-23 01:13:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:40,471 INFO L225 Difference]: With dead ends: 618 [2018-11-23 01:13:40,471 INFO L226 Difference]: Without dead ends: 329 [2018-11-23 01:13:40,472 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 991 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=2203, Unknown=0, NotChecked=0, Total=2550 [2018-11-23 01:13:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2018-11-23 01:13:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 298. [2018-11-23 01:13:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-11-23 01:13:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 473 transitions. [2018-11-23 01:13:40,490 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 473 transitions. Word has length 994 [2018-11-23 01:13:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:40,491 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 473 transitions. [2018-11-23 01:13:40,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-23 01:13:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 473 transitions. [2018-11-23 01:13:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1186 [2018-11-23 01:13:40,497 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:40,498 INFO L402 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 71, 69, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 28, 26, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:40,498 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:40,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:40,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1236619637, now seen corresponding path program 10 times [2018-11-23 01:13:40,498 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:40,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:40,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:40,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:13:40,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 41639 backedges. 872 proven. 3408 refuted. 0 times theorem prover too weak. 37359 trivial. 0 not checked. [2018-11-23 01:13:41,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:41,138 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/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 [2018-11-23 01:13:41,144 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 01:13:41,285 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 01:13:41,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:13:41,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 41639 backedges. 876 proven. 3400 refuted. 0 times theorem prover too weak. 37363 trivial. 0 not checked. [2018-11-23 01:13:41,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:41,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2018-11-23 01:13:41,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 01:13:41,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 01:13:41,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2018-11-23 01:13:41,720 INFO L87 Difference]: Start difference. First operand 298 states and 473 transitions. Second operand 18 states. [2018-11-23 01:13:41,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:41,942 INFO L93 Difference]: Finished difference Result 325 states and 550 transitions. [2018-11-23 01:13:41,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-23 01:13:41,942 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1185 [2018-11-23 01:13:41,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:41,946 INFO L225 Difference]: With dead ends: 325 [2018-11-23 01:13:41,946 INFO L226 Difference]: Without dead ends: 277 [2018-11-23 01:13:41,947 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1215 GetRequests, 1190 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2018-11-23 01:13:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-11-23 01:13:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 268. [2018-11-23 01:13:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-11-23 01:13:41,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 364 transitions. [2018-11-23 01:13:41,969 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 364 transitions. Word has length 1185 [2018-11-23 01:13:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:41,969 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 364 transitions. [2018-11-23 01:13:41,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 01:13:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 364 transitions. [2018-11-23 01:13:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1077 [2018-11-23 01:13:41,977 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:41,977 INFO L402 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 64, 63, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 25, 24, 16, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:41,978 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:41,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:41,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1318090551, now seen corresponding path program 11 times [2018-11-23 01:13:41,978 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:41,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:41,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:41,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:13:41,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 34233 backedges. 2238 proven. 656 refuted. 0 times theorem prover too weak. 31339 trivial. 0 not checked. [2018-11-23 01:13:42,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:42,634 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/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 [2018-11-23 01:13:42,641 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 01:13:42,854 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-11-23 01:13:42,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:13:42,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 34233 backedges. 15826 proven. 773 refuted. 0 times theorem prover too weak. 17634 trivial. 0 not checked. [2018-11-23 01:13:43,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:43,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 21 [2018-11-23 01:13:43,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-23 01:13:43,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-23 01:13:43,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2018-11-23 01:13:43,372 INFO L87 Difference]: Start difference. First operand 268 states and 364 transitions. Second operand 21 states. [2018-11-23 01:13:44,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:44,232 INFO L93 Difference]: Finished difference Result 547 states and 763 transitions. [2018-11-23 01:13:44,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-23 01:13:44,232 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1076 [2018-11-23 01:13:44,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:44,235 INFO L225 Difference]: With dead ends: 547 [2018-11-23 01:13:44,235 INFO L226 Difference]: Without dead ends: 278 [2018-11-23 01:13:44,237 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1125 GetRequests, 1073 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=2467, Unknown=0, NotChecked=0, Total=2862 [2018-11-23 01:13:44,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-11-23 01:13:44,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 266. [2018-11-23 01:13:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-11-23 01:13:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 341 transitions. [2018-11-23 01:13:44,260 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 341 transitions. Word has length 1076 [2018-11-23 01:13:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:44,260 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 341 transitions. [2018-11-23 01:13:44,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-23 01:13:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 341 transitions. [2018-11-23 01:13:44,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1540 [2018-11-23 01:13:44,275 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:44,275 INFO L402 BasicCegarLoop]: trace histogram [114, 114, 111, 111, 92, 90, 57, 57, 57, 57, 57, 57, 57, 55, 55, 55, 55, 55, 55, 55, 37, 33, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:44,275 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:44,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:44,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1684082029, now seen corresponding path program 12 times [2018-11-23 01:13:44,276 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:44,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:44,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:44,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:13:44,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 70699 backedges. 5874 proven. 821 refuted. 0 times theorem prover too weak. 64004 trivial. 0 not checked. [2018-11-23 01:13:45,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:45,240 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:45,247 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 01:13:45,386 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-11-23 01:13:45,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:13:45,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 70699 backedges. 1568 proven. 4063 refuted. 0 times theorem prover too weak. 65068 trivial. 0 not checked. [2018-11-23 01:13:46,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:46,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 31 [2018-11-23 01:13:46,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-23 01:13:46,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-23 01:13:46,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2018-11-23 01:13:46,189 INFO L87 Difference]: Start difference. First operand 266 states and 341 transitions. Second operand 31 states. [2018-11-23 01:13:47,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:47,177 INFO L93 Difference]: Finished difference Result 416 states and 537 transitions. [2018-11-23 01:13:47,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-11-23 01:13:47,178 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 1539 [2018-11-23 01:13:47,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:47,182 INFO L225 Difference]: With dead ends: 416 [2018-11-23 01:13:47,182 INFO L226 Difference]: Without dead ends: 308 [2018-11-23 01:13:47,184 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1600 GetRequests, 1534 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=599, Invalid=3957, Unknown=0, NotChecked=0, Total=4556 [2018-11-23 01:13:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-11-23 01:13:47,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 269. [2018-11-23 01:13:47,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-11-23 01:13:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 328 transitions. [2018-11-23 01:13:47,207 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 328 transitions. Word has length 1539 [2018-11-23 01:13:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:47,208 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 328 transitions. [2018-11-23 01:13:47,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-23 01:13:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 328 transitions. [2018-11-23 01:13:47,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1390 [2018-11-23 01:13:47,220 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:47,220 INFO L402 BasicCegarLoop]: trace histogram [102, 102, 101, 101, 82, 82, 51, 51, 51, 51, 51, 51, 51, 50, 50, 50, 50, 50, 50, 50, 32, 31, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:47,220 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:47,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:47,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1927837140, now seen corresponding path program 13 times [2018-11-23 01:13:47,221 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:47,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:47,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:47,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:13:47,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 57446 backedges. 2149 proven. 6053 refuted. 0 times theorem prover too weak. 49244 trivial. 0 not checked. [2018-11-23 01:13:48,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:48,127 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:48,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:48,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 57446 backedges. 2107 proven. 2950 refuted. 0 times theorem prover too weak. 52389 trivial. 0 not checked. [2018-11-23 01:13:49,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:49,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 28 [2018-11-23 01:13:49,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-23 01:13:49,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-23 01:13:49,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2018-11-23 01:13:49,013 INFO L87 Difference]: Start difference. First operand 269 states and 328 transitions. Second operand 28 states. [2018-11-23 01:13:49,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:49,921 INFO L93 Difference]: Finished difference Result 473 states and 579 transitions. [2018-11-23 01:13:49,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-23 01:13:49,924 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1389 [2018-11-23 01:13:49,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:49,926 INFO L225 Difference]: With dead ends: 473 [2018-11-23 01:13:49,927 INFO L226 Difference]: Without dead ends: 280 [2018-11-23 01:13:49,928 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1457 GetRequests, 1394 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=531, Invalid=3501, Unknown=0, NotChecked=0, Total=4032 [2018-11-23 01:13:49,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-11-23 01:13:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2018-11-23 01:13:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-11-23 01:13:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 340 transitions. [2018-11-23 01:13:49,951 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 340 transitions. Word has length 1389 [2018-11-23 01:13:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:49,952 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 340 transitions. [2018-11-23 01:13:49,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-23 01:13:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 340 transitions. [2018-11-23 01:13:49,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2018-11-23 01:13:49,961 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:49,962 INFO L402 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 72, 71, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 28, 27, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:49,962 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:49,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:49,962 INFO L82 PathProgramCache]: Analyzing trace with hash 416823031, now seen corresponding path program 14 times [2018-11-23 01:13:49,963 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:49,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:49,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:49,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:13:49,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 43585 backedges. 0 proven. 14453 refuted. 0 times theorem prover too weak. 29132 trivial. 0 not checked. [2018-11-23 01:13:52,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:52,410 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:52,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 01:13:52,603 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 01:13:52,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:13:52,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 43585 backedges. 0 proven. 14453 refuted. 0 times theorem prover too weak. 29132 trivial. 0 not checked. [2018-11-23 01:13:54,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:54,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 68 [2018-11-23 01:13:54,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-11-23 01:13:54,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-11-23 01:13:54,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2018-11-23 01:13:54,691 INFO L87 Difference]: Start difference. First operand 280 states and 340 transitions. Second operand 68 states. [2018-11-23 01:13:55,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:55,479 INFO L93 Difference]: Finished difference Result 290 states and 349 transitions. [2018-11-23 01:13:55,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-23 01:13:55,479 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 1212 [2018-11-23 01:13:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:55,481 INFO L225 Difference]: With dead ends: 290 [2018-11-23 01:13:55,482 INFO L226 Difference]: Without dead ends: 280 [2018-11-23 01:13:55,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1412 SyntacticMatches, 90 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2018-11-23 01:13:55,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-11-23 01:13:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2018-11-23 01:13:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-11-23 01:13:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 334 transitions. [2018-11-23 01:13:55,504 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 334 transitions. Word has length 1212 [2018-11-23 01:13:55,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:55,505 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 334 transitions. [2018-11-23 01:13:55,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-11-23 01:13:55,505 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 334 transitions. [2018-11-23 01:13:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1322 [2018-11-23 01:13:55,515 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:13:55,516 INFO L402 BasicCegarLoop]: trace histogram [97, 97, 96, 96, 79, 77, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 31, 29, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:13:55,516 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:13:55,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:13:55,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1445780197, now seen corresponding path program 15 times [2018-11-23 01:13:55,516 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:13:55,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:13:55,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:55,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:13:55,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:13:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:13:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 51895 backedges. 5085 proven. 1622 refuted. 0 times theorem prover too weak. 45188 trivial. 0 not checked. [2018-11-23 01:13:56,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:13:56,324 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:13:56,332 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 01:13:56,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-11-23 01:13:56,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:13:56,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:13:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 51895 backedges. 4806 proven. 722 refuted. 0 times theorem prover too weak. 46367 trivial. 0 not checked. [2018-11-23 01:13:57,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:13:57,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 27 [2018-11-23 01:13:57,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-23 01:13:57,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-23 01:13:57,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2018-11-23 01:13:57,218 INFO L87 Difference]: Start difference. First operand 280 states and 334 transitions. Second operand 27 states. [2018-11-23 01:13:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:13:58,164 INFO L93 Difference]: Finished difference Result 328 states and 392 transitions. [2018-11-23 01:13:58,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-11-23 01:13:58,164 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 1321 [2018-11-23 01:13:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:13:58,165 INFO L225 Difference]: With dead ends: 328 [2018-11-23 01:13:58,165 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 01:13:58,167 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1395 GetRequests, 1324 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=670, Invalid=4586, Unknown=0, NotChecked=0, Total=5256 [2018-11-23 01:13:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 01:13:58,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 01:13:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 01:13:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 01:13:58,168 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1321 [2018-11-23 01:13:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:13:58,168 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 01:13:58,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-23 01:13:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 01:13:58,168 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 01:13:58,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 01:13:58,193 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,226 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,242 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,245 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,282 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,288 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,304 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,319 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,325 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,342 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,367 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,387 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,442 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,456 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,475 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,681 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,731 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,920 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,950 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,952 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,954 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,954 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,960 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,977 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,978 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,991 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,991 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:58,992 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,008 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,008 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,094 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,098 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,111 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,111 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,126 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,126 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,129 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,129 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,138 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,143 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,146 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,148 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,148 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,151 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,151 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,167 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,167 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,173 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,173 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,185 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,236 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,236 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,276 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,277 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,296 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,296 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,298 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,298 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,299 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,299 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,316 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,317 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,318 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,318 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,330 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,344 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,345 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,348 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:13:59,619 WARN L180 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 8 [2018-11-23 01:13:59,773 WARN L180 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 1 [2018-11-23 01:13:59,942 WARN L180 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 1 [2018-11-23 01:14:00,770 WARN L180 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 73 [2018-11-23 01:14:01,005 WARN L180 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 9 [2018-11-23 01:14:01,884 WARN L180 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 63 [2018-11-23 01:14:01,886 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 01:14:01,886 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 01:14:01,886 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 01:14:01,886 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 01:14:01,886 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 01:14:01,886 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 01:14:01,886 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-11-23 01:14:01,886 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-23 01:14:01,886 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-23 01:14:01,886 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-11-23 01:14:01,886 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-23 01:14:01,886 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-11-23 01:14:01,886 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 10) (<= 10 main_~x~0)) [2018-11-23 01:14:01,886 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-11-23 01:14:01,886 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-11-23 01:14:01,886 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-11-23 01:14:01,887 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= 2 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n)) [2018-11-23 01:14:01,887 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-23 01:14:01,887 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse7 (<= |fibo2_#in~n| fibo2_~n)) (.cse8 (<= |fibo2_#in~n| 5)) (.cse3 (<= fibo2_~n |fibo2_#in~n|))) (let ((.cse0 (< |fibo2_#in~n| 5)) (.cse1 (and .cse3 (<= |fibo2_#in~n| 7) (<= 7 fibo2_~n))) (.cse2 (and (<= 5 |fibo2_#in~n|) .cse7 .cse3 .cse8)) (.cse5 (and .cse7 .cse3 (<= 9 |fibo2_#in~n|))) (.cse6 (<= |fibo2_#in~n| 8)) (.cse4 (and (<= |fibo2_#in~n| 6) (<= 6 fibo2_~n)))) (and (or (< 7 |fibo2_#in~n|) .cse0 .cse1 (and (<= 5 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 5)) .cse2) .cse3 (<= 2 fibo2_~n) (or (<= 4 fibo2_~n) (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1))) (or .cse0 (< 6 |fibo2_#in~n|) (and (<= |fibo2_#t~ret2| 3) (<= 3 |fibo2_#t~ret2|)) .cse4) (or (< |fibo2_#in~n| 7) .cse5 (and (<= 8 fibo2_~n) (<= |fibo2_#t~ret2| 13) (<= 13 |fibo2_#t~ret2|)) .cse1) (or (<= 10 |fibo2_#in~n|) .cse6 (and (<= 21 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 21))) (or (< 5 |fibo2_#in~n|) (and (<= |fibo2_#in~n| 3) .cse7) (and (<= |fibo2_#t~ret2| 2) (<= 2 |fibo2_#t~ret2|)) .cse2) (or .cse5 (and (<= |fibo2_#t~ret2| 8) (<= 8 |fibo2_#t~ret2|)) .cse8 (and (<= 8 |fibo2_#in~n|) .cse6) .cse4)))) [2018-11-23 01:14:01,887 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-23 01:14:01,887 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-11-23 01:14:01,887 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-11-23 01:14:01,887 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-11-23 01:14:01,887 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-11-23 01:14:01,887 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-11-23 01:14:01,887 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (< 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2018-11-23 01:14:01,887 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-23 01:14:01,887 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|))) (let ((.cse2 (< |fibo1_#in~n| 4)) (.cse1 (and (<= 2 |fibo1_#t~ret0|) .cse0 (<= |fibo1_#t~ret0| 2) (<= 4 fibo1_~n) (<= |fibo1_#in~n| 4)))) (and (or (and (<= |fibo1_#t~ret0| 34) (<= 34 |fibo1_#t~ret0|)) (<= |fibo1_#in~n| 9) (<= 11 |fibo1_#in~n|)) .cse0 (or (<= 5 |fibo1_#in~n|) .cse1 .cse2) (or (and (<= 3 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 3)) (< 5 |fibo1_#in~n|) .cse2 .cse1) (or (<= 9 |fibo1_#in~n|) (and (<= |fibo1_#t~ret0| 13) (<= 13 |fibo1_#t~ret0|)) (<= |fibo1_#in~n| 7)) (<= |fibo1_#in~n| fibo1_~n) (or (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|) (<= |fibo1_#in~n| 6)) (< 7 |fibo1_#in~n|) (< |fibo1_#in~n| 6) (and (<= 8 |fibo1_#t~ret0|) (<= 7 |fibo1_#in~n|) (<= |fibo1_#t~ret0| 8))) (or (<= 4 |fibo1_#in~n|) (and (<= 1 |fibo1_#t~ret0|) (<= 3 |fibo1_#in~n|) (<= |fibo1_#t~ret0| 1)))))) [2018-11-23 01:14:01,888 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-11-23 01:14:01,888 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-11-23 01:14:01,888 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-11-23 01:14:01,888 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-11-23 01:14:01,888 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-11-23 01:14:01,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:14:01 BoogieIcfgContainer [2018-11-23 01:14:01,891 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 01:14:01,891 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 01:14:01,891 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 01:14:01,891 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 01:14:01,892 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:13:22" (3/4) ... [2018-11-23 01:14:01,896 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 01:14:01,903 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 01:14:01,903 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 01:14:01,903 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-11-23 01:14:01,904 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-11-23 01:14:01,908 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 01:14:01,908 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 01:14:01,908 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 01:14:01,943 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b1107f0d-9f26-4fc3-b21f-54624125b6e2/bin-2019/uautomizer/witness.graphml [2018-11-23 01:14:01,943 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 01:14:01,944 INFO L168 Benchmark]: Toolchain (without parser) took 40066.74 ms. Allocated memory was 1.0 GB in the beginning and 4.2 GB in the end (delta: 3.1 GB). Free memory was 959.3 MB in the beginning and 1.8 GB in the end (delta: -862.3 MB). Peak memory consumption was 2.3 GB. Max. memory is 11.5 GB. [2018-11-23 01:14:01,945 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 01:14:01,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.84 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 01:14:01,945 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.50 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 01:14:01,946 INFO L168 Benchmark]: Boogie Preprocessor took 18.78 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 01:14:01,946 INFO L168 Benchmark]: RCFGBuilder took 261.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -159.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-23 01:14:01,946 INFO L168 Benchmark]: TraceAbstraction took 39545.48 ms. Allocated memory was 1.1 GB in the beginning and 4.2 GB in the end (delta: 3.0 GB). Free memory was 1.1 GB in the beginning and 1.8 GB in the end (delta: -716.7 MB). Peak memory consumption was 2.3 GB. Max. memory is 11.5 GB. [2018-11-23 01:14:01,947 INFO L168 Benchmark]: Witness Printer took 52.36 ms. Allocated memory is still 4.2 GB. Free memory is still 1.8 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 01:14:01,949 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 170.84 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.50 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.78 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 261.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -159.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 39545.48 ms. Allocated memory was 1.1 GB in the beginning and 4.2 GB in the end (delta: 3.0 GB). Free memory was 1.1 GB in the beginning and 1.8 GB in the end (delta: -716.7 MB). Peak memory consumption was 2.3 GB. Max. memory is 11.5 GB. * Witness Printer took 52.36 ms. Allocated memory is still 4.2 GB. Free memory is still 1.8 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. SAFE Result, 39.4s OverallTime, 24 OverallIterations, 114 TraceHistogramMax, 11.9s AutomataDifference, 0.0s DeadEndRemovalTime, 3.7s HoareAnnotationTime, HoareTripleCheckerStatistics: 979 SDtfs, 1975 SDslu, 11691 SDs, 0 SdLazy, 15860 SolverSat, 2314 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16846 GetRequests, 15911 SyntacticMatches, 94 SemanticMatches, 841 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9303 ImplicationChecksByTransitivity, 10.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred 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: 0.3s AutomataMinimizationTime, 24 MinimizatonAttempts, 375 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 1691 PreInvPairs, 3094 NumberOfFragments, 368 HoareAnnotationTreeSize, 1691 FomulaSimplifications, 72051 FormulaSimplificationTreeSizeReduction, 1.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 53504 FormulaSimplificationTreeSizeReductionInter, 2.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 14.0s InterpolantComputationTime, 31501 NumberOfCodeBlocks, 26158 NumberOfCodeBlocksAsserted, 192 NumberOfCheckSat, 31455 ConstructedInterpolants, 0 QuantifiedInterpolants, 48936389 SizeOfPredicates, 152 NumberOfNonLiveVariables, 22880 ConjunctsInSsa, 1016 ConjunctsInUnsatCore, 46 InterpolantComputations, 2 PerfectInterpolantSequences, 964628/1043816 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...