./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_15_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_15_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e276c1695adb4f8d30ce6cf27956cb3af3968bc9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 13:32:28,349 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 13:32:28,350 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 13:32:28,356 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 13:32:28,357 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 13:32:28,357 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 13:32:28,358 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 13:32:28,360 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 13:32:28,361 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 13:32:28,362 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 13:32:28,362 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 13:32:28,362 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 13:32:28,363 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 13:32:28,364 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 13:32:28,365 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 13:32:28,365 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 13:32:28,366 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 13:32:28,367 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 13:32:28,369 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 13:32:28,370 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 13:32:28,371 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 13:32:28,372 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 13:32:28,373 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 13:32:28,374 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 13:32:28,374 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 13:32:28,375 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 13:32:28,375 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 13:32:28,376 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 13:32:28,376 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 13:32:28,377 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 13:32:28,377 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 13:32:28,378 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 13:32:28,378 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 13:32:28,378 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 13:32:28,379 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 13:32:28,379 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 13:32:28,380 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 13:32:28,390 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 13:32:28,390 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 13:32:28,391 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 13:32:28,391 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 13:32:28,391 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 13:32:28,392 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 13:32:28,392 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 13:32:28,392 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 13:32:28,392 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 13:32:28,392 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 13:32:28,392 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 13:32:28,393 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 13:32:28,393 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 13:32:28,393 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 13:32:28,393 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 13:32:28,393 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 13:32:28,393 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 13:32:28,393 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 13:32:28,393 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 13:32:28,394 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 13:32:28,394 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 13:32:28,394 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 13:32:28,394 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 13:32:28,394 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:32:28,394 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 13:32:28,395 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 13:32:28,395 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 13:32:28,395 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 13:32:28,395 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 13:32:28,395 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 13:32:28,397 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_c32ff057-d976-4309-92a6-31b2398dce6c/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e276c1695adb4f8d30ce6cf27956cb3af3968bc9 [2018-11-28 13:32:28,424 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 13:32:28,434 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 13:32:28,436 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 13:32:28,438 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 13:32:28,438 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 13:32:28,438 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_15_true-unreach-call.c [2018-11-28 13:32:28,480 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/bin-2019/uautomizer/data/eb4b10c0b/ab8982cf4a2e4330aafcff00e9fece94/FLAGf333f653a [2018-11-28 13:32:28,875 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 13:32:28,876 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/sv-benchmarks/c/recursive-simple/fibo_15_true-unreach-call.c [2018-11-28 13:32:28,880 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/bin-2019/uautomizer/data/eb4b10c0b/ab8982cf4a2e4330aafcff00e9fece94/FLAGf333f653a [2018-11-28 13:32:28,890 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/bin-2019/uautomizer/data/eb4b10c0b/ab8982cf4a2e4330aafcff00e9fece94 [2018-11-28 13:32:28,893 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 13:32:28,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 13:32:28,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 13:32:28,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 13:32:28,897 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 13:32:28,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:32:28" (1/1) ... [2018-11-28 13:32:28,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@315f9928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:32:28, skipping insertion in model container [2018-11-28 13:32:28,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:32:28" (1/1) ... [2018-11-28 13:32:28,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 13:32:28,916 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 13:32:29,005 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:32:29,008 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 13:32:29,016 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:32:29,024 INFO L195 MainTranslator]: Completed translation [2018-11-28 13:32:29,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:32:29 WrapperNode [2018-11-28 13:32:29,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 13:32:29,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 13:32:29,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 13:32:29,025 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 13:32:29,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:32:29" (1/1) ... [2018-11-28 13:32:29,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:32:29" (1/1) ... [2018-11-28 13:32:29,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 13:32:29,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 13:32:29,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 13:32:29,037 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 13:32:29,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:32:29" (1/1) ... [2018-11-28 13:32:29,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:32:29" (1/1) ... [2018-11-28 13:32:29,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:32:29" (1/1) ... [2018-11-28 13:32:29,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:32:29" (1/1) ... [2018-11-28 13:32:29,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:32:29" (1/1) ... [2018-11-28 13:32:29,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:32:29" (1/1) ... [2018-11-28 13:32:29,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:32:29" (1/1) ... [2018-11-28 13:32:29,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 13:32:29,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 13:32:29,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 13:32:29,049 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 13:32:29,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:32:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 13:32:29,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 13:32:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 13:32:29,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 13:32:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 13:32:29,120 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 13:32:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-28 13:32:29,120 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-28 13:32:29,235 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 13:32:29,235 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 13:32:29,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:32:29 BoogieIcfgContainer [2018-11-28 13:32:29,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 13:32:29,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 13:32:29,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 13:32:29,238 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 13:32:29,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 01:32:28" (1/3) ... [2018-11-28 13:32:29,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a51d881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:32:29, skipping insertion in model container [2018-11-28 13:32:29,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:32:29" (2/3) ... [2018-11-28 13:32:29,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a51d881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:32:29, skipping insertion in model container [2018-11-28 13:32:29,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:32:29" (3/3) ... [2018-11-28 13:32:29,241 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_15_true-unreach-call.c [2018-11-28 13:32:29,247 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 13:32:29,252 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 13:32:29,267 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 13:32:29,292 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 13:32:29,293 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 13:32:29,293 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 13:32:29,293 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 13:32:29,293 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 13:32:29,293 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 13:32:29,293 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 13:32:29,293 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 13:32:29,294 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 13:32:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-28 13:32:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 13:32:29,313 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:29,314 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:29,316 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:29,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:29,321 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-11-28 13:32:29,322 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:29,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:29,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:29,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:32:29,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:32:29,465 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:32:29,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 13:32:29,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:32:29,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:32:29,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:32:29,483 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-28 13:32:29,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:29,569 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-28 13:32:29,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:32:29,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 13:32:29,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:29,576 INFO L225 Difference]: With dead ends: 35 [2018-11-28 13:32:29,576 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 13:32:29,578 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 [2018-11-28 13:32:29,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 13:32:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 13:32:29,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 13:32:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 13:32:29,605 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-28 13:32:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:29,605 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 13:32:29,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:32:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 13:32:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 13:32:29,607 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:29,607 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:29,607 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:29,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:29,607 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-11-28 13:32:29,608 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:29,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:29,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:29,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:32:29,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:32:29,635 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:32:29,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 13:32:29,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:32:29,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:32:29,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:32:29,637 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-28 13:32:29,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:29,712 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-28 13:32:29,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:32:29,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 13:32:29,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:29,714 INFO L225 Difference]: With dead ends: 27 [2018-11-28 13:32:29,714 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 13:32:29,715 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 [2018-11-28 13:32:29,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 13:32:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-28 13:32:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 13:32:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 13:32:29,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-28 13:32:29,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:29,720 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 13:32:29,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:32:29,721 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 13:32:29,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 13:32:29,721 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:29,722 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:29,722 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:29,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:29,722 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-11-28 13:32:29,722 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:29,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:29,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:29,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:32:29,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 13:32:29,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:29,792 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:29,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:32:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:29,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 13:32:29,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:29,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-28 13:32:29,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 13:32:29,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 13:32:29,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:32:29,894 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-28 13:32:29,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:29,990 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-28 13:32:29,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 13:32:29,991 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-28 13:32:29,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:29,991 INFO L225 Difference]: With dead ends: 38 [2018-11-28 13:32:29,991 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 13:32:29,992 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:32:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 13:32:29,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 13:32:29,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 13:32:29,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-28 13:32:29,997 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-28 13:32:29,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:29,997 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-28 13:32:29,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 13:32:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-28 13:32:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 13:32:29,998 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:29,998 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:29,999 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:29,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:29,999 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-11-28 13:32:29,999 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:29,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:30,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:30,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:32:30,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 13:32:30,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:30,038 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:30,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:32:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:30,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 13:32:30,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:30,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 13:32:30,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 13:32:30,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 13:32:30,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:32:30,092 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-28 13:32:30,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:30,138 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-28 13:32:30,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 13:32:30,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-28 13:32:30,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:30,139 INFO L225 Difference]: With dead ends: 32 [2018-11-28 13:32:30,139 INFO L226 Difference]: Without dead ends: 28 [2018-11-28 13:32:30,140 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:32:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-28 13:32:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-28 13:32:30,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 13:32:30,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-28 13:32:30,145 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-28 13:32:30,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:30,146 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-28 13:32:30,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 13:32:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-28 13:32:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 13:32:30,147 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:30,147 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:30,147 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:30,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:30,147 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-11-28 13:32:30,148 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:30,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:30,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:30,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:32:30,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-28 13:32:30,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:30,196 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:30,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:32:30,229 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:32:30,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:32:30,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-28 13:32:30,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:30,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-11-28 13:32:30,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 13:32:30,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 13:32:30,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:32:30,295 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-11-28 13:32:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:30,367 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-11-28 13:32:30,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 13:32:30,368 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-28 13:32:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:30,369 INFO L225 Difference]: With dead ends: 40 [2018-11-28 13:32:30,369 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 13:32:30,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:32:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 13:32:30,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-28 13:32:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 13:32:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-28 13:32:30,377 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-28 13:32:30,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:30,377 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-28 13:32:30,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 13:32:30,377 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-28 13:32:30,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-28 13:32:30,379 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:30,380 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:30,380 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:30,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:30,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-11-28 13:32:30,380 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:30,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:30,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:30,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:32:30,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-28 13:32:30,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:30,546 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:30,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:32:30,577 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-28 13:32:30,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:32:30,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-28 13:32:30,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:30,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-28 13:32:30,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:32:30,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:32:30,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:32:30,622 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-11-28 13:32:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:30,814 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-11-28 13:32:30,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 13:32:30,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-11-28 13:32:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:30,817 INFO L225 Difference]: With dead ends: 76 [2018-11-28 13:32:30,817 INFO L226 Difference]: Without dead ends: 49 [2018-11-28 13:32:30,817 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-28 13:32:30,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-28 13:32:30,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-11-28 13:32:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-28 13:32:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-11-28 13:32:30,825 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-11-28 13:32:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:30,826 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-11-28 13:32:30,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:32:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-11-28 13:32:30,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-28 13:32:30,828 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:30,828 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:30,830 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:30,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:30,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 4 times [2018-11-28 13:32:30,830 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:30,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:30,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:30,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:32:30,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-28 13:32:30,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:30,884 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:30,894 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:32:30,909 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:32:30,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:32:30,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-28 13:32:30,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:30,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2018-11-28 13:32:30,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 13:32:30,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 13:32:30,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:32:30,956 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 8 states. [2018-11-28 13:32:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:31,024 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2018-11-28 13:32:31,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 13:32:31,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2018-11-28 13:32:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:31,026 INFO L225 Difference]: With dead ends: 52 [2018-11-28 13:32:31,026 INFO L226 Difference]: Without dead ends: 48 [2018-11-28 13:32:31,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:32:31,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-28 13:32:31,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-28 13:32:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-28 13:32:31,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2018-11-28 13:32:31,035 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 68 [2018-11-28 13:32:31,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:31,035 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2018-11-28 13:32:31,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 13:32:31,035 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2018-11-28 13:32:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-11-28 13:32:31,038 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:31,038 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:31,039 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:31,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:31,039 INFO L82 PathProgramCache]: Analyzing trace with hash 702878917, now seen corresponding path program 5 times [2018-11-28 13:32:31,039 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:31,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:31,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:31,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:32:31,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 213 proven. 64 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-11-28 13:32:31,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:31,123 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:31,131 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:32:31,155 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 13:32:31,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:32:31,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 422 proven. 118 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2018-11-28 13:32:31,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:31,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2018-11-28 13:32:31,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 13:32:31,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 13:32:31,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:32:31,240 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand 13 states. [2018-11-28 13:32:31,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:31,489 INFO L93 Difference]: Finished difference Result 111 states and 206 transitions. [2018-11-28 13:32:31,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 13:32:31,489 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-11-28 13:32:31,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:31,490 INFO L225 Difference]: With dead ends: 111 [2018-11-28 13:32:31,490 INFO L226 Difference]: Without dead ends: 69 [2018-11-28 13:32:31,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2018-11-28 13:32:31,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-28 13:32:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2018-11-28 13:32:31,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-28 13:32:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2018-11-28 13:32:31,496 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 123 [2018-11-28 13:32:31,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:31,496 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2018-11-28 13:32:31,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 13:32:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2018-11-28 13:32:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-28 13:32:31,499 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:31,499 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:31,499 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:31,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:31,499 INFO L82 PathProgramCache]: Analyzing trace with hash 259499213, now seen corresponding path program 6 times [2018-11-28 13:32:31,499 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:31,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:31,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:31,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:32:31,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 328 proven. 115 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2018-11-28 13:32:31,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:31,589 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:31,601 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:32:31,656 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-11-28 13:32:31,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:32:31,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 202 proven. 241 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2018-11-28 13:32:31,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:31,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 13:32:31,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 13:32:31,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 13:32:31,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-28 13:32:31,710 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 9 states. [2018-11-28 13:32:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:31,793 INFO L93 Difference]: Finished difference Result 80 states and 109 transitions. [2018-11-28 13:32:31,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 13:32:31,794 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 177 [2018-11-28 13:32:31,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:31,796 INFO L225 Difference]: With dead ends: 80 [2018-11-28 13:32:31,796 INFO L226 Difference]: Without dead ends: 76 [2018-11-28 13:32:31,796 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:32:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-28 13:32:31,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2018-11-28 13:32:31,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-28 13:32:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2018-11-28 13:32:31,804 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 177 [2018-11-28 13:32:31,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:31,804 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2018-11-28 13:32:31,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 13:32:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2018-11-28 13:32:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-11-28 13:32:31,810 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:31,810 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 43, 26, 26, 26, 26, 26, 26, 26, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:31,810 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:31,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:31,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1341952681, now seen corresponding path program 7 times [2018-11-28 13:32:31,811 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:31,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:31,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:31,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:32:31,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7715 backedges. 274 proven. 1274 refuted. 0 times theorem prover too weak. 6167 trivial. 0 not checked. [2018-11-28 13:32:31,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:31,949 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:31,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:32:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:32,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7715 backedges. 240 proven. 1545 refuted. 0 times theorem prover too weak. 5930 trivial. 0 not checked. [2018-11-28 13:32:32,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:32,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2018-11-28 13:32:32,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 13:32:32,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 13:32:32,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-28 13:32:32,112 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand 11 states. [2018-11-28 13:32:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:32,224 INFO L93 Difference]: Finished difference Result 86 states and 128 transitions. [2018-11-28 13:32:32,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 13:32:32,225 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 368 [2018-11-28 13:32:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:32,226 INFO L225 Difference]: With dead ends: 86 [2018-11-28 13:32:32,226 INFO L226 Difference]: Without dead ends: 82 [2018-11-28 13:32:32,226 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-28 13:32:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-11-28 13:32:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2018-11-28 13:32:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-11-28 13:32:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 109 transitions. [2018-11-28 13:32:32,234 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 109 transitions. Word has length 368 [2018-11-28 13:32:32,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:32,234 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 109 transitions. [2018-11-28 13:32:32,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 13:32:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 109 transitions. [2018-11-28 13:32:32,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2018-11-28 13:32:32,244 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:32,245 INFO L402 BasicCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:32,245 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:32,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:32,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1932846124, now seen corresponding path program 8 times [2018-11-28 13:32:32,246 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:32,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:32,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:32,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:32:32,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 440 proven. 2503 refuted. 0 times theorem prover too weak. 16160 trivial. 0 not checked. [2018-11-28 13:32:32,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:32,534 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:32,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:32:32,647 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:32:32,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:32:32,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 401 proven. 2942 refuted. 0 times theorem prover too weak. 15760 trivial. 0 not checked. [2018-11-28 13:32:32,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:32,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2018-11-28 13:32:32,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:32:32,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:32:32,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:32:32,805 INFO L87 Difference]: Start difference. First operand 76 states and 109 transitions. Second operand 12 states. [2018-11-28 13:32:32,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:32,956 INFO L93 Difference]: Finished difference Result 85 states and 130 transitions. [2018-11-28 13:32:32,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 13:32:32,957 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 572 [2018-11-28 13:32:32,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:32,959 INFO L225 Difference]: With dead ends: 85 [2018-11-28 13:32:32,959 INFO L226 Difference]: Without dead ends: 81 [2018-11-28 13:32:32,959 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-28 13:32:32,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-28 13:32:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-28 13:32:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-28 13:32:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 125 transitions. [2018-11-28 13:32:32,968 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 125 transitions. Word has length 572 [2018-11-28 13:32:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:32,968 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 125 transitions. [2018-11-28 13:32:32,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:32:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 125 transitions. [2018-11-28 13:32:32,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 886 [2018-11-28 13:32:32,975 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:32,976 INFO L402 BasicCegarLoop]: trace histogram [129, 129, 104, 64, 64, 64, 64, 64, 64, 64, 40, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:32,976 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:32,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:32,976 INFO L82 PathProgramCache]: Analyzing trace with hash 109591711, now seen corresponding path program 9 times [2018-11-28 13:32:32,976 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:32,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:32,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:32,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:32:32,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 46444 backedges. 3144 proven. 1574 refuted. 0 times theorem prover too weak. 41726 trivial. 0 not checked. [2018-11-28 13:32:33,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:33,384 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:33,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:32:33,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-11-28 13:32:33,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:32:33,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 46444 backedges. 779 proven. 5264 refuted. 0 times theorem prover too weak. 40401 trivial. 0 not checked. [2018-11-28 13:32:33,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:33,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 13 [2018-11-28 13:32:33,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 13:32:33,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 13:32:33,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:32:33,838 INFO L87 Difference]: Start difference. First operand 81 states and 125 transitions. Second operand 13 states. [2018-11-28 13:32:33,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:33,988 INFO L93 Difference]: Finished difference Result 90 states and 148 transitions. [2018-11-28 13:32:33,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 13:32:33,988 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 885 [2018-11-28 13:32:33,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:33,990 INFO L225 Difference]: With dead ends: 90 [2018-11-28 13:32:33,991 INFO L226 Difference]: Without dead ends: 86 [2018-11-28 13:32:33,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 890 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-28 13:32:33,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-11-28 13:32:34,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-11-28 13:32:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-11-28 13:32:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 143 transitions. [2018-11-28 13:32:34,001 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 143 transitions. Word has length 885 [2018-11-28 13:32:34,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:34,002 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 143 transitions. [2018-11-28 13:32:34,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 13:32:34,002 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 143 transitions. [2018-11-28 13:32:34,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1636 [2018-11-28 13:32:34,013 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:34,014 INFO L402 BasicCegarLoop]: trace histogram [239, 239, 194, 119, 119, 119, 119, 119, 119, 119, 75, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:34,014 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:34,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:34,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1252276512, now seen corresponding path program 10 times [2018-11-28 13:32:34,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:34,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:34,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:34,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:32:34,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 160569 backedges. 2022 proven. 12191 refuted. 0 times theorem prover too weak. 146356 trivial. 0 not checked. [2018-11-28 13:32:34,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:34,974 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:34,980 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:32:35,177 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:32:35,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:32:35,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 160569 backedges. 38552 proven. 813 refuted. 0 times theorem prover too weak. 121204 trivial. 0 not checked. [2018-11-28 13:32:36,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:36,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2018-11-28 13:32:36,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 13:32:36,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 13:32:36,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2018-11-28 13:32:36,062 INFO L87 Difference]: Start difference. First operand 86 states and 143 transitions. Second operand 18 states. [2018-11-28 13:32:36,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:36,377 INFO L93 Difference]: Finished difference Result 184 states and 385 transitions. [2018-11-28 13:32:36,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 13:32:36,377 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1635 [2018-11-28 13:32:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:36,379 INFO L225 Difference]: With dead ends: 184 [2018-11-28 13:32:36,379 INFO L226 Difference]: Without dead ends: 108 [2018-11-28 13:32:36,381 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1675 GetRequests, 1638 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=336, Invalid=1070, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 13:32:36,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-11-28 13:32:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 98. [2018-11-28 13:32:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-11-28 13:32:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 155 transitions. [2018-11-28 13:32:36,390 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 155 transitions. Word has length 1635 [2018-11-28 13:32:36,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:36,391 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 155 transitions. [2018-11-28 13:32:36,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 13:32:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 155 transitions. [2018-11-28 13:32:36,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1649 [2018-11-28 13:32:36,407 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:36,407 INFO L402 BasicCegarLoop]: trace histogram [241, 241, 195, 120, 120, 120, 120, 120, 120, 120, 75, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:36,407 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:36,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:36,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1142190481, now seen corresponding path program 11 times [2018-11-28 13:32:36,408 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:36,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:36,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:36,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:32:36,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 163155 backedges. 8079 proven. 5054 refuted. 0 times theorem prover too weak. 150022 trivial. 0 not checked. [2018-11-28 13:32:37,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:37,415 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:37,421 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:32:37,736 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-11-28 13:32:37,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:32:37,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 163155 backedges. 82474 proven. 2967 refuted. 0 times theorem prover too weak. 77714 trivial. 0 not checked. [2018-11-28 13:32:38,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:38,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2018-11-28 13:32:38,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 13:32:38,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 13:32:38,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2018-11-28 13:32:38,482 INFO L87 Difference]: Start difference. First operand 98 states and 155 transitions. Second operand 21 states. [2018-11-28 13:32:39,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:39,073 INFO L93 Difference]: Finished difference Result 235 states and 495 transitions. [2018-11-28 13:32:39,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-28 13:32:39,073 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1648 [2018-11-28 13:32:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:39,076 INFO L225 Difference]: With dead ends: 235 [2018-11-28 13:32:39,076 INFO L226 Difference]: Without dead ends: 147 [2018-11-28 13:32:39,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1697 GetRequests, 1646 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=549, Invalid=2103, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 13:32:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-11-28 13:32:39,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 122. [2018-11-28 13:32:39,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-11-28 13:32:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 182 transitions. [2018-11-28 13:32:39,091 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 182 transitions. Word has length 1648 [2018-11-28 13:32:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:39,092 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 182 transitions. [2018-11-28 13:32:39,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 13:32:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 182 transitions. [2018-11-28 13:32:39,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1608 [2018-11-28 13:32:39,116 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:39,116 INFO L402 BasicCegarLoop]: trace histogram [235, 235, 190, 117, 117, 117, 117, 117, 117, 117, 73, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:39,116 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:39,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:39,117 INFO L82 PathProgramCache]: Analyzing trace with hash -98786292, now seen corresponding path program 12 times [2018-11-28 13:32:39,117 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:39,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:39,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:39,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:32:39,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 155079 backedges. 1505 proven. 9870 refuted. 0 times theorem prover too weak. 143704 trivial. 0 not checked. [2018-11-28 13:32:40,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:40,215 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:40,221 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:32:40,336 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-11-28 13:32:40,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:32:40,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 155079 backedges. 2100 proven. 9275 refuted. 0 times theorem prover too weak. 143704 trivial. 0 not checked. [2018-11-28 13:32:41,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:41,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-28 13:32:41,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 13:32:41,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 13:32:41,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:32:41,165 INFO L87 Difference]: Start difference. First operand 122 states and 182 transitions. Second operand 14 states. [2018-11-28 13:32:41,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:41,308 INFO L93 Difference]: Finished difference Result 131 states and 204 transitions. [2018-11-28 13:32:41,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 13:32:41,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1607 [2018-11-28 13:32:41,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:41,311 INFO L225 Difference]: With dead ends: 131 [2018-11-28 13:32:41,311 INFO L226 Difference]: Without dead ends: 127 [2018-11-28 13:32:41,312 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1637 GetRequests, 1615 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-28 13:32:41,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-28 13:32:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-11-28 13:32:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-11-28 13:32:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 199 transitions. [2018-11-28 13:32:41,322 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 199 transitions. Word has length 1607 [2018-11-28 13:32:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:41,323 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 199 transitions. [2018-11-28 13:32:41,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 13:32:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 199 transitions. [2018-11-28 13:32:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2248 [2018-11-28 13:32:41,349 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:41,350 INFO L402 BasicCegarLoop]: trace histogram [329, 329, 266, 164, 164, 164, 164, 164, 164, 164, 102, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:41,350 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:41,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:41,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1173251755, now seen corresponding path program 13 times [2018-11-28 13:32:41,350 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:41,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:41,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:41,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:32:41,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 304533 backedges. 11441 proven. 4658 refuted. 0 times theorem prover too weak. 288434 trivial. 0 not checked. [2018-11-28 13:32:42,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:42,956 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:42,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:32:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:43,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 304533 backedges. 2259 proven. 17445 refuted. 0 times theorem prover too weak. 284829 trivial. 0 not checked. [2018-11-28 13:32:44,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:44,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 15 [2018-11-28 13:32:44,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 13:32:44,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 13:32:44,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-28 13:32:44,558 INFO L87 Difference]: Start difference. First operand 127 states and 199 transitions. Second operand 15 states. [2018-11-28 13:32:44,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:44,693 INFO L93 Difference]: Finished difference Result 136 states and 223 transitions. [2018-11-28 13:32:44,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 13:32:44,693 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 2247 [2018-11-28 13:32:44,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:44,697 INFO L225 Difference]: With dead ends: 136 [2018-11-28 13:32:44,697 INFO L226 Difference]: Without dead ends: 132 [2018-11-28 13:32:44,698 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2278 GetRequests, 2254 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-28 13:32:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-11-28 13:32:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-11-28 13:32:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-11-28 13:32:44,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 218 transitions. [2018-11-28 13:32:44,708 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 218 transitions. Word has length 2247 [2018-11-28 13:32:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:44,709 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 218 transitions. [2018-11-28 13:32:44,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 13:32:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 218 transitions. [2018-11-28 13:32:44,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4577 [2018-11-28 13:32:44,773 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:44,774 INFO L402 BasicCegarLoop]: trace histogram [671, 671, 543, 335, 335, 335, 335, 335, 335, 335, 208, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:44,774 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:44,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:44,774 INFO L82 PathProgramCache]: Analyzing trace with hash 158968524, now seen corresponding path program 14 times [2018-11-28 13:32:44,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:44,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:44,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:44,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:32:44,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:32:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1270073 backedges. 12695 proven. 37478 refuted. 0 times theorem prover too weak. 1219900 trivial. 0 not checked. [2018-11-28 13:32:50,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:32:50,395 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:32:50,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:32:51,002 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:32:51,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:32:51,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:32:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1270073 backedges. 4195 proven. 40454 refuted. 0 times theorem prover too weak. 1225424 trivial. 0 not checked. [2018-11-28 13:32:55,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:32:55,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 27 [2018-11-28 13:32:55,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-28 13:32:55,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-28 13:32:55,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2018-11-28 13:32:55,772 INFO L87 Difference]: Start difference. First operand 132 states and 218 transitions. Second operand 27 states. [2018-11-28 13:32:57,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:32:57,142 INFO L93 Difference]: Finished difference Result 374 states and 927 transitions. [2018-11-28 13:32:57,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-11-28 13:32:57,143 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 4576 [2018-11-28 13:32:57,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:32:57,147 INFO L225 Difference]: With dead ends: 374 [2018-11-28 13:32:57,147 INFO L226 Difference]: Without dead ends: 252 [2018-11-28 13:32:57,151 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4675 GetRequests, 4575 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3245 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1934, Invalid=8368, Unknown=0, NotChecked=0, Total=10302 [2018-11-28 13:32:57,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-11-28 13:32:57,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 230. [2018-11-28 13:32:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-11-28 13:32:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 395 transitions. [2018-11-28 13:32:57,165 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 395 transitions. Word has length 4576 [2018-11-28 13:32:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:32:57,166 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 395 transitions. [2018-11-28 13:32:57,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-28 13:32:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 395 transitions. [2018-11-28 13:32:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5598 [2018-11-28 13:32:57,274 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:32:57,275 INFO L402 BasicCegarLoop]: trace histogram [821, 821, 664, 410, 410, 410, 410, 410, 410, 410, 254, 157, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:32:57,275 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:32:57,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:32:57,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1905422167, now seen corresponding path program 15 times [2018-11-28 13:32:57,276 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:32:57,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:32:57,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:57,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:32:57,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:32:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1901936 backedges. 5920 proven. 48881 refuted. 0 times theorem prover too weak. 1847135 trivial. 0 not checked. [2018-11-28 13:33:05,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:05,031 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:33:05,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:33:05,259 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-11-28 13:33:05,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:05,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1901936 backedges. 5856 proven. 53577 refuted. 0 times theorem prover too weak. 1842503 trivial. 0 not checked. [2018-11-28 13:33:12,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:12,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2018-11-28 13:33:12,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 13:33:12,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 13:33:12,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-28 13:33:12,178 INFO L87 Difference]: Start difference. First operand 230 states and 395 transitions. Second operand 17 states. [2018-11-28 13:33:12,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:12,405 INFO L93 Difference]: Finished difference Result 239 states and 422 transitions. [2018-11-28 13:33:12,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 13:33:12,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 5597 [2018-11-28 13:33:12,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:12,409 INFO L225 Difference]: With dead ends: 239 [2018-11-28 13:33:12,410 INFO L226 Difference]: Without dead ends: 235 [2018-11-28 13:33:12,410 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5636 GetRequests, 5608 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-28 13:33:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-11-28 13:33:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-11-28 13:33:12,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-11-28 13:33:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 414 transitions. [2018-11-28 13:33:12,421 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 414 transitions. Word has length 5597 [2018-11-28 13:33:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:12,422 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 414 transitions. [2018-11-28 13:33:12,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 13:33:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 414 transitions. [2018-11-28 13:33:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11590 [2018-11-28 13:33:12,776 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:12,777 INFO L402 BasicCegarLoop]: trace histogram [1701, 1701, 1376, 850, 850, 850, 850, 850, 850, 850, 526, 325, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:33:12,778 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:12,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:12,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2144537003, now seen corresponding path program 16 times [2018-11-28 13:33:12,779 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:12,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:12,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:12,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:33:12,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8172700 backedges. 90421 proven. 46811 refuted. 0 times theorem prover too weak. 8035468 trivial. 0 not checked. [2018-11-28 13:33:42,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:42,733 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:33:42,740 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:33:44,100 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:33:44,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:44,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8172700 backedges. 3976653 proven. 91547 refuted. 0 times theorem prover too weak. 4104500 trivial. 0 not checked. [2018-11-28 13:34:13,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:34:13,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29] total 36 [2018-11-28 13:34:13,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-28 13:34:13,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-28 13:34:13,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 13:34:13,349 INFO L87 Difference]: Start difference. First operand 235 states and 414 transitions. Second operand 36 states. [2018-11-28 13:34:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:14,324 INFO L93 Difference]: Finished difference Result 554 states and 1373 transitions. [2018-11-28 13:34:14,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-11-28 13:34:14,324 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 11589 [2018-11-28 13:34:14,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:14,328 INFO L225 Difference]: With dead ends: 554 [2018-11-28 13:34:14,328 INFO L226 Difference]: Without dead ends: 309 [2018-11-28 13:34:14,331 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11661 GetRequests, 11586 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1131, Invalid=4569, Unknown=0, NotChecked=0, Total=5700 [2018-11-28 13:34:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-11-28 13:34:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 191. [2018-11-28 13:34:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-11-28 13:34:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 256 transitions. [2018-11-28 13:34:14,341 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 256 transitions. Word has length 11589 [2018-11-28 13:34:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:14,343 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 256 transitions. [2018-11-28 13:34:14,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-28 13:34:14,343 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 256 transitions. [2018-11-28 13:34:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8308 [2018-11-28 13:34:14,541 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:14,542 INFO L402 BasicCegarLoop]: trace histogram [1219, 1219, 986, 609, 609, 609, 609, 609, 609, 609, 377, 233, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:34:14,542 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:14,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:14,543 INFO L82 PathProgramCache]: Analyzing trace with hash -497867032, now seen corresponding path program 17 times [2018-11-28 13:34:14,543 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:34:14,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:34:14,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:34:14,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:34:14,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:34:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4195633 backedges. 53811 proven. 27936 refuted. 0 times theorem prover too weak. 4113886 trivial. 0 not checked. [2018-11-28 13:34:30,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:34:30,180 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:34:30,189 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:35:41,553 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 998 check-sat command(s) [2018-11-28 13:35:41,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:35:41,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:35:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4195633 backedges. 58121 proven. 30572 refuted. 0 times theorem prover too weak. 4106940 trivial. 0 not checked. [2018-11-28 13:35:56,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:35:56,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2018-11-28 13:35:56,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 13:35:56,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 13:35:56,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-28 13:35:56,405 INFO L87 Difference]: Start difference. First operand 191 states and 256 transitions. Second operand 17 states. [2018-11-28 13:35:56,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:35:56,543 INFO L93 Difference]: Finished difference Result 198 states and 268 transitions. [2018-11-28 13:35:56,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 13:35:56,543 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 8307 [2018-11-28 13:35:56,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:35:56,550 INFO L225 Difference]: With dead ends: 198 [2018-11-28 13:35:56,550 INFO L226 Difference]: Without dead ends: 194 [2018-11-28 13:35:56,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8346 GetRequests, 8318 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-28 13:35:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-11-28 13:35:56,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-11-28 13:35:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-11-28 13:35:56,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 264 transitions. [2018-11-28 13:35:56,565 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 264 transitions. Word has length 8307 [2018-11-28 13:35:56,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:35:56,570 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 264 transitions. [2018-11-28 13:35:56,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 13:35:56,570 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 264 transitions. [2018-11-28 13:35:57,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10269 [2018-11-28 13:35:57,040 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:35:57,043 INFO L402 BasicCegarLoop]: trace histogram [1507, 1507, 1219, 753, 753, 753, 753, 753, 753, 753, 466, 288, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:35:57,043 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:35:57,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:35:57,044 INFO L82 PathProgramCache]: Analyzing trace with hash -287649748, now seen corresponding path program 18 times [2018-11-28 13:35:57,046 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:35:57,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:35:57,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:35:57,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:35:57,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:35:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:36:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6413967 backedges. 10209 proven. 99657 refuted. 0 times theorem prover too weak. 6304101 trivial. 0 not checked. [2018-11-28 13:36:20,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:36:20,916 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:36:20,922 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:36:21,456 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 111 check-sat command(s) [2018-11-28 13:36:21,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:36:21,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:36:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6413967 backedges. 10140 proven. 108332 refuted. 0 times theorem prover too weak. 6295495 trivial. 0 not checked. [2018-11-28 13:36:43,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:36:43,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 18 [2018-11-28 13:36:43,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 13:36:43,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 13:36:43,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-28 13:36:43,760 INFO L87 Difference]: Start difference. First operand 194 states and 264 transitions. Second operand 18 states. [2018-11-28 13:36:43,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:36:43,960 INFO L93 Difference]: Finished difference Result 203 states and 280 transitions. [2018-11-28 13:36:43,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 13:36:43,961 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 10268 [2018-11-28 13:36:43,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:36:43,966 INFO L225 Difference]: With dead ends: 203 [2018-11-28 13:36:43,966 INFO L226 Difference]: Without dead ends: 199 [2018-11-28 13:36:43,967 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10310 GetRequests, 10280 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-28 13:36:43,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-11-28 13:36:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2018-11-28 13:36:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-11-28 13:36:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 263 transitions. [2018-11-28 13:36:43,975 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 263 transitions. Word has length 10268 [2018-11-28 13:36:43,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:36:43,975 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 263 transitions. [2018-11-28 13:36:43,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 13:36:43,976 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 263 transitions. [2018-11-28 13:36:44,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15403 [2018-11-28 13:36:44,604 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:36:44,605 INFO L402 BasicCegarLoop]: trace histogram [2261, 2261, 1829, 1130, 1130, 1130, 1130, 1130, 1130, 1130, 699, 432, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:36:44,605 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:36:44,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:36:44,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1714024521, now seen corresponding path program 19 times [2018-11-28 13:36:44,607 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:36:44,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:36:44,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:36:44,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:36:44,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:36:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:37:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14442966 backedges. 70164 proven. 112610 refuted. 0 times theorem prover too weak. 14260192 trivial. 0 not checked. [2018-11-28 13:37:36,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:37:36,624 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:37:36,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:37:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:37:39,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:38:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 14442966 backedges. 70186 proven. 112575 refuted. 0 times theorem prover too weak. 14260205 trivial. 0 not checked. [2018-11-28 13:38:28,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:38:28,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 22 [2018-11-28 13:38:28,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 13:38:28,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 13:38:28,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2018-11-28 13:38:28,583 INFO L87 Difference]: Start difference. First operand 196 states and 263 transitions. Second operand 22 states. [2018-11-28 13:38:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:38:28,789 INFO L93 Difference]: Finished difference Result 211 states and 295 transitions. [2018-11-28 13:38:28,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 13:38:28,790 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 15402 [2018-11-28 13:38:28,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:38:28,799 INFO L225 Difference]: With dead ends: 211 [2018-11-28 13:38:28,800 INFO L226 Difference]: Without dead ends: 196 [2018-11-28 13:38:28,800 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15447 GetRequests, 15413 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=415, Invalid=775, Unknown=0, NotChecked=0, Total=1190 [2018-11-28 13:38:28,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-11-28 13:38:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-11-28 13:38:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-11-28 13:38:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 256 transitions. [2018-11-28 13:38:28,811 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 256 transitions. Word has length 15402 [2018-11-28 13:38:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:38:28,816 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 256 transitions. [2018-11-28 13:38:28,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 13:38:28,816 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 256 transitions. [2018-11-28 13:38:29,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13442 [2018-11-28 13:38:29,452 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:38:29,453 INFO L402 BasicCegarLoop]: trace histogram [1973, 1973, 1596, 986, 986, 986, 986, 986, 986, 986, 610, 377, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:38:29,453 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:38:29,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:38:29,454 INFO L82 PathProgramCache]: Analyzing trace with hash -982105371, now seen corresponding path program 20 times [2018-11-28 13:38:29,454 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:38:29,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:38:29,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:38:29,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:38:29,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:38:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:40:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10996742 backedges. 0 proven. 3626247 refuted. 0 times theorem prover too weak. 7370495 trivial. 0 not checked. [2018-11-28 13:40:13,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:40:13,135 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:40:13,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:40:15,933 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:40:15,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:40:16,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:41:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10996742 backedges. 0 proven. 3626247 refuted. 0 times theorem prover too weak. 7370495 trivial. 0 not checked. [2018-11-28 13:41:51,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:41:51,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 60 [2018-11-28 13:41:51,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-11-28 13:41:51,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-11-28 13:41:51,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2018-11-28 13:41:51,540 INFO L87 Difference]: Start difference. First operand 196 states and 256 transitions. Second operand 60 states. [2018-11-28 13:41:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:41:52,297 INFO L93 Difference]: Finished difference Result 209 states and 275 transitions. [2018-11-28 13:41:52,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-28 13:41:52,298 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 13441 [2018-11-28 13:41:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:41:52,307 INFO L225 Difference]: With dead ends: 209 [2018-11-28 13:41:52,307 INFO L226 Difference]: Without dead ends: 202 [2018-11-28 13:41:52,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17389 GetRequests, 16344 SyntacticMatches, 987 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2018-11-28 13:41:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-11-28 13:41:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2018-11-28 13:41:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-11-28 13:41:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 262 transitions. [2018-11-28 13:41:52,319 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 262 transitions. Word has length 13441 [2018-11-28 13:41:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:41:52,320 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 262 transitions. [2018-11-28 13:41:52,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-11-28 13:41:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 262 transitions. [2018-11-28 13:41:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16615 [2018-11-28 13:41:53,076 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:41:53,077 INFO L402 BasicCegarLoop]: trace histogram [2439, 2439, 1973, 1219, 1219, 1219, 1219, 1219, 1219, 1219, 754, 466, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:41:53,077 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:41:53,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:41:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1640834156, now seen corresponding path program 21 times [2018-11-28 13:41:53,078 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:41:53,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:41:53,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:41:53,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:41:53,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:41:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:42:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16807426 backedges. 23027 proven. 188230 refuted. 0 times theorem prover too weak. 16596169 trivial. 0 not checked. [2018-11-28 13:42:52,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:42:52,488 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/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 [2018-11-28 13:42:52,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:42:52,965 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-11-28 13:42:52,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:42:53,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:43:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16807426 backedges. 23055 proven. 188188 refuted. 0 times theorem prover too weak. 16596183 trivial. 0 not checked. [2018-11-28 13:43:49,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:43:49,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 23 [2018-11-28 13:43:49,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-28 13:43:49,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-28 13:43:49,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2018-11-28 13:43:49,551 INFO L87 Difference]: Start difference. First operand 201 states and 262 transitions. Second operand 23 states. [2018-11-28 13:43:49,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:43:49,766 INFO L93 Difference]: Finished difference Result 204 states and 270 transitions. [2018-11-28 13:43:49,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 13:43:49,766 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 16614 [2018-11-28 13:43:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:43:49,771 INFO L225 Difference]: With dead ends: 204 [2018-11-28 13:43:49,771 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 13:43:49,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16662 GetRequests, 16626 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=466, Invalid=866, Unknown=0, NotChecked=0, Total=1332 [2018-11-28 13:43:49,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 13:43:49,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 13:43:49,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 13:43:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 13:43:49,773 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16614 [2018-11-28 13:43:49,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:43:49,774 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 13:43:49,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-28 13:43:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 13:43:49,774 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 13:43:49,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 13:43:50,080 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 13:43:50,086 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 13:43:51,451 WARN L180 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 275 DAG size of output: 119 [2018-11-28 13:43:51,662 WARN L180 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 9 [2018-11-28 13:43:51,663 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 13:43:51,663 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 13:43:51,663 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 13:43:51,663 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 13:43:51,663 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 13:43:51,663 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 13:43:51,664 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-11-28 13:43:51,664 INFO L448 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-11-28 13:43:51,664 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-11-28 13:43:51,664 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= 15 main_~x~0) (<= main_~x~0 15)) [2018-11-28 13:43:51,664 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-11-28 13:43:51,664 INFO L448 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-11-28 13:43:51,664 INFO L448 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-11-28 13:43:51,664 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-11-28 13:43:51,664 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-11-28 13:43:51,664 INFO L448 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-11-28 13:43:51,664 INFO L448 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-11-28 13:43:51,664 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (< 1 |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n)) [2018-11-28 13:43:51,664 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-28 13:43:51,665 INFO L444 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse13 (<= 5 |fibo_#in~n|)) (.cse11 (<= fibo_~n 4)) (.cse21 (<= |fibo_#in~n| 12)) (.cse22 (<= 12 |fibo_#in~n|)) (.cse26 (<= 7 |fibo_#in~n|)) (.cse27 (<= |fibo_#in~n| 7)) (.cse24 (<= 10 |fibo_#in~n|)) (.cse25 (<= |fibo_#in~n| 10)) (.cse20 (<= |fibo_#in~n| 11)) (.cse23 (<= |fibo_#in~n| 13)) (.cse19 (<= 13 |fibo_#in~n|))) (let ((.cse0 (and .cse23 .cse19)) (.cse1 (and .cse20 (<= 11 |fibo_#in~n|))) (.cse7 (and .cse24 .cse25)) (.cse8 (and .cse26 (<= |fibo_#t~ret0| 8) (<= 8 |fibo_#t~ret0|) .cse27)) (.cse3 (and .cse21 .cse22)) (.cse4 (<= 14 |fibo_#in~n|)) (.cse5 (and (<= 9 |fibo_#in~n|) (<= |fibo_#in~n| 9))) (.cse12 (and .cse26 .cse27)) (.cse2 (and .cse24 .cse25 (<= 34 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 34))) (.cse15 (and (<= 4 |fibo_#in~n|) .cse11)) (.cse14 (and (<= fibo_~n 6) (<= 6 |fibo_#in~n|))) (.cse16 (and .cse13 (<= |fibo_#in~n| 5))) (.cse6 (and (<= |fibo_#in~n| 8) (<= 8 fibo_~n))) (.cse9 (and (<= |fibo_#t~ret0| 144) .cse23 (<= 144 |fibo_#t~ret0|) .cse19)) (.cse10 (and (<= 89 |fibo_#t~ret0|) .cse21 (<= |fibo_#t~ret0| 89) .cse22))) (and (or .cse0 .cse1 .cse2 (< |fibo_#in~n| 9) (and (<= |fibo_#t~ret0| 21) (<= 21 |fibo_#t~ret0|)) .cse3 .cse4) (or .cse0 .cse5 (and (<= |fibo_#t~ret0| 5) (<= 5 |fibo_#t~ret0|)) .cse6 .cse1 .cse7 .cse8 (< |fibo_#in~n| 6) .cse3 .cse4) (or .cse9 .cse10 (< |fibo_#in~n| 12) .cse4) (or (and .cse11 (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) .cse5 .cse1 .cse12 (and .cse13 (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3)) .cse4 .cse14 .cse0 (< |fibo_#in~n| 4) .cse6 .cse7 .cse3) (or .cse5 .cse1 .cse12 (and (<= |fibo_#t~ret0| 1) (<= 1 |fibo_#t~ret0|) (< 1 fibo_~n)) .cse15 .cse4 .cse14 .cse0 .cse16 .cse6 .cse7 .cse3) (or (< |fibo_#in~n| 7) .cse0 .cse5 .cse1 .cse7 (and (<= |fibo_#t~ret0| 13) (<= 13 |fibo_#t~ret0|)) .cse8 .cse3 .cse4) (let ((.cse17 (<= fibo_~n |fibo_#in~n|)) (.cse18 (<= |fibo_#in~n| fibo_~n))) (or (and .cse17 .cse18 (<= |fibo_#in~n| 14)) (and .cse17 .cse18 (<= 16 |fibo_#in~n|)) (and (<= 377 |fibo_#t~ret0|) .cse17 .cse18 (<= |fibo_#t~ret0| 377)))) (or (<= |fibo_#in~n| 3) .cse5 (<= 15 |fibo_#in~n|) .cse12 .cse2 .cse15 .cse14 .cse16 .cse6 .cse9 (and (<= 233 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 233) .cse19) .cse10 (and (<= 55 |fibo_#t~ret0|) .cse20 (<= |fibo_#t~ret0| 55)))))) [2018-11-28 13:43:51,665 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-11-28 13:43:51,665 INFO L448 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-11-28 13:43:51,665 INFO L448 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-11-28 13:43:51,665 INFO L451 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-11-28 13:43:51,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 01:43:51 BoogieIcfgContainer [2018-11-28 13:43:51,667 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 13:43:51,667 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 13:43:51,667 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 13:43:51,668 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 13:43:51,668 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:32:29" (3/4) ... [2018-11-28 13:43:51,676 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 13:43:51,680 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 13:43:51,681 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 13:43:51,681 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-11-28 13:43:51,684 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 13:43:51,684 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 13:43:51,684 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 13:43:51,712 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c32ff057-d976-4309-92a6-31b2398dce6c/bin-2019/uautomizer/witness.graphml [2018-11-28 13:43:51,712 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 13:43:51,713 INFO L168 Benchmark]: Toolchain (without parser) took 682819.67 ms. Allocated memory was 1.0 GB in the beginning and 5.8 GB in the end (delta: 4.8 GB). Free memory was 952.2 MB in the beginning and 3.9 GB in the end (delta: -2.9 GB). Peak memory consumption was 1.8 GB. Max. memory is 11.5 GB. [2018-11-28 13:43:51,713 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:43:51,713 INFO L168 Benchmark]: CACSL2BoogieTranslator took 129.93 ms. Allocated memory is still 1.0 GB. Free memory was 952.2 MB in the beginning and 941.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-28 13:43:51,714 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.22 ms. Allocated memory is still 1.0 GB. Free memory is still 941.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:43:51,714 INFO L168 Benchmark]: Boogie Preprocessor took 11.29 ms. Allocated memory is still 1.0 GB. Free memory is still 941.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:43:51,714 INFO L168 Benchmark]: RCFGBuilder took 186.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.3 MB). Free memory was 941.4 MB in the beginning and 1.1 GB in the end (delta: -169.2 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. [2018-11-28 13:43:51,714 INFO L168 Benchmark]: TraceAbstraction took 682431.31 ms. Allocated memory was 1.2 GB in the beginning and 5.8 GB in the end (delta: 4.6 GB). Free memory was 1.1 GB in the beginning and 3.9 GB in the end (delta: -2.8 GB). Peak memory consumption was 1.9 GB. Max. memory is 11.5 GB. [2018-11-28 13:43:51,715 INFO L168 Benchmark]: Witness Printer took 44.79 ms. Allocated memory is still 5.8 GB. Free memory is still 3.9 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:43:51,716 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 129.93 ms. Allocated memory is still 1.0 GB. Free memory was 952.2 MB in the beginning and 941.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.22 ms. Allocated memory is still 1.0 GB. Free memory is still 941.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.29 ms. Allocated memory is still 1.0 GB. Free memory is still 941.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 186.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.3 MB). Free memory was 941.4 MB in the beginning and 1.1 GB in the end (delta: -169.2 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 682431.31 ms. Allocated memory was 1.2 GB in the beginning and 5.8 GB in the end (delta: 4.6 GB). Free memory was 1.1 GB in the beginning and 3.9 GB in the end (delta: -2.8 GB). Peak memory consumption was 1.9 GB. Max. memory is 11.5 GB. * Witness Printer took 44.79 ms. Allocated memory is still 5.8 GB. Free memory is still 3.9 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 682.3s OverallTime, 24 OverallIterations, 2439 TraceHistogramMax, 6.7s AutomataDifference, 0.0s DeadEndRemovalTime, 1.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 679 SDtfs, 1805 SDslu, 4983 SDs, 0 SdLazy, 7955 SolverSat, 2229 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99978 GetRequests, 98314 SyntacticMatches, 993 SemanticMatches, 671 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7457 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=235occurred 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: 0.2s AutomataMinimizationTime, 24 MinimizatonAttempts, 201 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 470 PreInvPairs, 799 NumberOfFragments, 551 HoareAnnotationTreeSize, 470 FomulaSimplifications, 4747 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 13059 FormulaSimplificationTreeSizeReductionInter, 1.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 2.5s SsaConstructionTime, 84.3s SatisfiabilityAnalysisTime, 312.0s InterpolantComputationTime, 190653 NumberOfCodeBlocks, 155111 NumberOfCodeBlocksAsserted, 1451 NumberOfCheckSat, 190607 ConstructedInterpolants, 0 QuantifiedInterpolants, 3421505043 SizeOfPredicates, 215 NumberOfNonLiveVariables, 131198 ConjunctsInSsa, 8329 ConjunctsInUnsatCore, 46 InterpolantComputations, 2 PerfectInterpolantSequences, 121604797/130122260 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...