./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive/Ackermann03_true-unreach-call_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann03_true-unreach-call_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 33d0641b9a339cc7e30dea71c1d04be4d72dcf57 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 12:28:49,396 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 12:28:49,397 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 12:28:49,404 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 12:28:49,404 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 12:28:49,405 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 12:28:49,406 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 12:28:49,407 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 12:28:49,408 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 12:28:49,408 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 12:28:49,409 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 12:28:49,409 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 12:28:49,410 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 12:28:49,411 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 12:28:49,411 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 12:28:49,411 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 12:28:49,412 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 12:28:49,413 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 12:28:49,414 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 12:28:49,415 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 12:28:49,415 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 12:28:49,416 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 12:28:49,417 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 12:28:49,417 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 12:28:49,418 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 12:28:49,418 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 12:28:49,419 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 12:28:49,420 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 12:28:49,420 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 12:28:49,421 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 12:28:49,421 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 12:28:49,422 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 12:28:49,422 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 12:28:49,422 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 12:28:49,423 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 12:28:49,423 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 12:28:49,423 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-18 12:28:49,430 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 12:28:49,431 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 12:28:49,433 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 12:28:49,433 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 12:28:49,433 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 12:28:49,433 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 12:28:49,433 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 12:28:49,433 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 12:28:49,434 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 12:28:49,434 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 12:28:49,434 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 12:28:49,434 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 12:28:49,434 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 12:28:49,434 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 12:28:49,434 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 12:28:49,434 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 12:28:49,434 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 12:28:49,435 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 12:28:49,435 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 12:28:49,435 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 12:28:49,435 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 12:28:49,435 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 12:28:49,435 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 12:28:49,435 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:28:49,435 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 12:28:49,436 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 12:28:49,436 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 12:28:49,436 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 12:28:49,436 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 12:28:49,436 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 12:28:49,436 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_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 -> 33d0641b9a339cc7e30dea71c1d04be4d72dcf57 [2018-11-18 12:28:49,463 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 12:28:49,472 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 12:28:49,474 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 12:28:49,476 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 12:28:49,476 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 12:28:49,476 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Ackermann03_true-unreach-call_true-no-overflow.c [2018-11-18 12:28:49,522 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/bin-2019/uautomizer/data/e69137d7b/f25032ea28d546b6828c6a02275fa26b/FLAG872b443a0 [2018-11-18 12:28:49,925 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 12:28:49,925 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/sv-benchmarks/c/recursive/Ackermann03_true-unreach-call_true-no-overflow.c [2018-11-18 12:28:49,929 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/bin-2019/uautomizer/data/e69137d7b/f25032ea28d546b6828c6a02275fa26b/FLAG872b443a0 [2018-11-18 12:28:49,940 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/bin-2019/uautomizer/data/e69137d7b/f25032ea28d546b6828c6a02275fa26b [2018-11-18 12:28:49,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 12:28:49,943 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 12:28:49,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 12:28:49,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 12:28:49,946 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 12:28:49,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:28:49" (1/1) ... [2018-11-18 12:28:49,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@411459c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:28:49, skipping insertion in model container [2018-11-18 12:28:49,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:28:49" (1/1) ... [2018-11-18 12:28:49,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 12:28:49,966 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 12:28:50,075 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:28:50,077 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 12:28:50,087 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:28:50,095 INFO L195 MainTranslator]: Completed translation [2018-11-18 12:28:50,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:28:50 WrapperNode [2018-11-18 12:28:50,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 12:28:50,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 12:28:50,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 12:28:50,096 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 12:28:50,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:28:50" (1/1) ... [2018-11-18 12:28:50,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:28:50" (1/1) ... [2018-11-18 12:28:50,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:28:50" (1/1) ... [2018-11-18 12:28:50,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:28:50" (1/1) ... [2018-11-18 12:28:50,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:28:50" (1/1) ... [2018-11-18 12:28:50,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:28:50" (1/1) ... [2018-11-18 12:28:50,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:28:50" (1/1) ... [2018-11-18 12:28:50,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 12:28:50,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 12:28:50,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 12:28:50,114 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 12:28:50,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:28:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 [2018-11-18 12:28:50,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 12:28:50,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 12:28:50,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2018-11-18 12:28:50,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 12:28:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 12:28:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 12:28:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2018-11-18 12:28:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 12:28:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 12:28:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 12:28:50,291 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 12:28:50,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:28:50 BoogieIcfgContainer [2018-11-18 12:28:50,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 12:28:50,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 12:28:50,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 12:28:50,294 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 12:28:50,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:28:49" (1/3) ... [2018-11-18 12:28:50,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3126630b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:28:50, skipping insertion in model container [2018-11-18 12:28:50,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:28:50" (2/3) ... [2018-11-18 12:28:50,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3126630b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:28:50, skipping insertion in model container [2018-11-18 12:28:50,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:28:50" (3/3) ... [2018-11-18 12:28:50,297 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann03_true-unreach-call_true-no-overflow.c [2018-11-18 12:28:50,305 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 12:28:50,311 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 12:28:50,321 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 12:28:50,341 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 12:28:50,341 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 12:28:50,342 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 12:28:50,342 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 12:28:50,342 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 12:28:50,342 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 12:28:50,342 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 12:28:50,342 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 12:28:50,342 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 12:28:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-11-18 12:28:50,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 12:28:50,362 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:28:50,363 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:28:50,364 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:28:50,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:28:50,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2018-11-18 12:28:50,371 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:28:50,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:28:50,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:50,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:28:50,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:28:50,502 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:28:50,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 12:28:50,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:28:50,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:28:50,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:28:50,514 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2018-11-18 12:28:50,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:28:50,620 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2018-11-18 12:28:50,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:28:50,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-18 12:28:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:28:50,628 INFO L225 Difference]: With dead ends: 55 [2018-11-18 12:28:50,628 INFO L226 Difference]: Without dead ends: 28 [2018-11-18 12:28:50,630 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:28:50,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-18 12:28:50,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-18 12:28:50,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 12:28:50,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2018-11-18 12:28:50,657 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2018-11-18 12:28:50,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:28:50,657 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2018-11-18 12:28:50,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:28:50,657 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2018-11-18 12:28:50,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-18 12:28:50,658 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:28:50,659 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:28:50,659 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:28:50,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:28:50,660 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2018-11-18 12:28:50,660 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:28:50,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:28:50,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:50,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:28:50,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 12:28:50,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:28:50,709 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 [2018-11-18 12:28:50,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:28:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:50,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:28:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 12:28:50,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:28:50,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-18 12:28:50,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:28:50,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:28:50,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:28:50,772 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2018-11-18 12:28:50,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:28:50,848 INFO L93 Difference]: Finished difference Result 52 states and 77 transitions. [2018-11-18 12:28:50,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:28:50,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-18 12:28:50,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:28:50,851 INFO L225 Difference]: With dead ends: 52 [2018-11-18 12:28:50,851 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 12:28:50,852 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:28:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 12:28:50,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-18 12:28:50,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 12:28:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2018-11-18 12:28:50,860 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2018-11-18 12:28:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:28:50,861 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2018-11-18 12:28:50,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:28:50,861 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2018-11-18 12:28:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-18 12:28:50,863 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:28:50,863 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:28:50,863 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:28:50,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:28:50,864 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2018-11-18 12:28:50,864 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:28:50,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:28:50,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:50,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:28:50,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 12:28:50,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:28:50,940 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 [2018-11-18 12:28:50,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:28:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:50,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:28:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-18 12:28:51,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:28:51,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-11-18 12:28:51,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 12:28:51,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 12:28:51,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-11-18 12:28:51,056 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 11 states. [2018-11-18 12:28:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:28:51,380 INFO L93 Difference]: Finished difference Result 87 states and 149 transitions. [2018-11-18 12:28:51,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 12:28:51,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-11-18 12:28:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:28:51,384 INFO L225 Difference]: With dead ends: 87 [2018-11-18 12:28:51,384 INFO L226 Difference]: Without dead ends: 79 [2018-11-18 12:28:51,385 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2018-11-18 12:28:51,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-11-18 12:28:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-11-18 12:28:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-18 12:28:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2018-11-18 12:28:51,404 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 35 [2018-11-18 12:28:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:28:51,404 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2018-11-18 12:28:51,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 12:28:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2018-11-18 12:28:51,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-18 12:28:51,408 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:28:51,408 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:28:51,409 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:28:51,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:28:51,409 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 2 times [2018-11-18 12:28:51,409 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:28:51,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:28:51,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:51,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:28:51,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 98 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-11-18 12:28:51,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:28:51,536 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 [2018-11-18 12:28:51,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:28:51,570 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:28:51,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:28:51,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:28:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-18 12:28:51,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:28:51,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 13 [2018-11-18 12:28:51,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 12:28:51,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 12:28:51,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-11-18 12:28:51,692 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 13 states. [2018-11-18 12:28:51,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:28:51,946 INFO L93 Difference]: Finished difference Result 227 states and 605 transitions. [2018-11-18 12:28:51,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 12:28:51,948 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2018-11-18 12:28:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:28:51,954 INFO L225 Difference]: With dead ends: 227 [2018-11-18 12:28:51,954 INFO L226 Difference]: Without dead ends: 156 [2018-11-18 12:28:51,957 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2018-11-18 12:28:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-11-18 12:28:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 85. [2018-11-18 12:28:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-18 12:28:51,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 150 transitions. [2018-11-18 12:28:51,980 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 150 transitions. Word has length 82 [2018-11-18 12:28:51,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:28:51,981 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 150 transitions. [2018-11-18 12:28:51,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 12:28:51,981 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 150 transitions. [2018-11-18 12:28:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-11-18 12:28:51,987 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:28:51,987 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 18, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:28:51,988 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:28:51,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:28:51,988 INFO L82 PathProgramCache]: Analyzing trace with hash 757188394, now seen corresponding path program 3 times [2018-11-18 12:28:51,988 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:28:51,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:28:51,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:51,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:28:51,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2013 backedges. 262 proven. 400 refuted. 0 times theorem prover too weak. 1351 trivial. 0 not checked. [2018-11-18 12:28:52,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:28:52,114 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 [2018-11-18 12:28:52,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:28:52,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-18 12:28:52,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:28:52,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:28:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2013 backedges. 757 proven. 22 refuted. 0 times theorem prover too weak. 1234 trivial. 0 not checked. [2018-11-18 12:28:52,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:28:52,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-18 12:28:52,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 12:28:52,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 12:28:52,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:28:52,213 INFO L87 Difference]: Start difference. First operand 85 states and 150 transitions. Second operand 9 states. [2018-11-18 12:28:52,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:28:52,387 INFO L93 Difference]: Finished difference Result 197 states and 475 transitions. [2018-11-18 12:28:52,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 12:28:52,387 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 201 [2018-11-18 12:28:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:28:52,390 INFO L225 Difference]: With dead ends: 197 [2018-11-18 12:28:52,391 INFO L226 Difference]: Without dead ends: 107 [2018-11-18 12:28:52,392 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2018-11-18 12:28:52,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-11-18 12:28:52,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-11-18 12:28:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-11-18 12:28:52,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 205 transitions. [2018-11-18 12:28:52,408 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 205 transitions. Word has length 201 [2018-11-18 12:28:52,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:28:52,409 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 205 transitions. [2018-11-18 12:28:52,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 12:28:52,410 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 205 transitions. [2018-11-18 12:28:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-11-18 12:28:52,413 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:28:52,413 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 19, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:28:52,414 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:28:52,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:28:52,414 INFO L82 PathProgramCache]: Analyzing trace with hash -149698588, now seen corresponding path program 4 times [2018-11-18 12:28:52,414 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:28:52,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:28:52,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:52,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:28:52,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 252 proven. 443 refuted. 0 times theorem prover too weak. 1468 trivial. 0 not checked. [2018-11-18 12:28:52,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:28:52,508 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 [2018-11-18 12:28:52,513 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:28:52,563 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:28:52,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:28:52,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:28:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 219 proven. 436 refuted. 0 times theorem prover too weak. 1508 trivial. 0 not checked. [2018-11-18 12:28:52,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:28:52,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2018-11-18 12:28:52,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 12:28:52,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 12:28:52,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:28:52,665 INFO L87 Difference]: Start difference. First operand 107 states and 205 transitions. Second operand 12 states. [2018-11-18 12:28:52,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:28:52,856 INFO L93 Difference]: Finished difference Result 174 states and 386 transitions. [2018-11-18 12:28:52,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 12:28:52,857 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 208 [2018-11-18 12:28:52,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:28:52,858 INFO L225 Difference]: With dead ends: 174 [2018-11-18 12:28:52,858 INFO L226 Difference]: Without dead ends: 60 [2018-11-18 12:28:52,859 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:28:52,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-18 12:28:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-18 12:28:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-18 12:28:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2018-11-18 12:28:52,869 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 208 [2018-11-18 12:28:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:28:52,870 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2018-11-18 12:28:52,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 12:28:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2018-11-18 12:28:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-18 12:28:52,871 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:28:52,871 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:28:52,871 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:28:52,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:28:52,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1060139340, now seen corresponding path program 5 times [2018-11-18 12:28:52,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:28:52,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:28:52,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:52,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:28:52,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 108 proven. 225 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2018-11-18 12:28:52,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:28:52,980 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 [2018-11-18 12:28:52,996 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 12:28:53,035 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-11-18 12:28:53,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:28:53,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:28:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 385 proven. 71 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2018-11-18 12:28:53,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:28:53,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-18 12:28:53,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 12:28:53,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 12:28:53,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-11-18 12:28:53,077 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand 13 states. [2018-11-18 12:28:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:28:53,291 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2018-11-18 12:28:53,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 12:28:53,291 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2018-11-18 12:28:53,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:28:53,292 INFO L225 Difference]: With dead ends: 101 [2018-11-18 12:28:53,292 INFO L226 Difference]: Without dead ends: 63 [2018-11-18 12:28:53,293 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2018-11-18 12:28:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-18 12:28:53,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2018-11-18 12:28:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-18 12:28:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2018-11-18 12:28:53,300 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 121 [2018-11-18 12:28:53,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:28:53,300 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2018-11-18 12:28:53,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 12:28:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2018-11-18 12:28:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-11-18 12:28:53,301 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:28:53,302 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:28:53,302 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:28:53,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:28:53,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1835077495, now seen corresponding path program 6 times [2018-11-18 12:28:53,302 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:28:53,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:28:53,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:53,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:28:53,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 139 proven. 297 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2018-11-18 12:28:53,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:28:53,405 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 [2018-11-18 12:28:53,412 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 12:28:53,463 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-11-18 12:28:53,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:28:53,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:28:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2018-11-18 12:28:53,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:28:53,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-18 12:28:53,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 12:28:53,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 12:28:53,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-11-18 12:28:53,532 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand 14 states. [2018-11-18 12:28:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:28:53,811 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2018-11-18 12:28:53,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 12:28:53,811 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 134 [2018-11-18 12:28:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:28:53,812 INFO L225 Difference]: With dead ends: 111 [2018-11-18 12:28:53,812 INFO L226 Difference]: Without dead ends: 73 [2018-11-18 12:28:53,813 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2018-11-18 12:28:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-11-18 12:28:53,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2018-11-18 12:28:53,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-18 12:28:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2018-11-18 12:28:53,824 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 134 [2018-11-18 12:28:53,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:28:53,824 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2018-11-18 12:28:53,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 12:28:53,824 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2018-11-18 12:28:53,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-11-18 12:28:53,826 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:28:53,826 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:28:53,826 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:28:53,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:28:53,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 7 times [2018-11-18 12:28:53,826 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:28:53,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:28:53,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:53,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:28:53,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2018-11-18 12:28:54,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:28:54,003 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 [2018-11-18 12:28:54,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:28:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:54,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:28:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2018-11-18 12:28:54,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:28:54,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-18 12:28:54,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 12:28:54,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 12:28:54,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:28:54,089 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand 20 states. [2018-11-18 12:28:54,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:28:54,507 INFO L93 Difference]: Finished difference Result 133 states and 170 transitions. [2018-11-18 12:28:54,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-18 12:28:54,507 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 160 [2018-11-18 12:28:54,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:28:54,508 INFO L225 Difference]: With dead ends: 133 [2018-11-18 12:28:54,508 INFO L226 Difference]: Without dead ends: 93 [2018-11-18 12:28:54,509 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=456, Invalid=2196, Unknown=0, NotChecked=0, Total=2652 [2018-11-18 12:28:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-18 12:28:54,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2018-11-18 12:28:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-18 12:28:54,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 99 transitions. [2018-11-18 12:28:54,515 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 99 transitions. Word has length 160 [2018-11-18 12:28:54,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:28:54,516 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 99 transitions. [2018-11-18 12:28:54,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 12:28:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 99 transitions. [2018-11-18 12:28:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-18 12:28:54,517 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:28:54,517 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:28:54,518 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:28:54,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:28:54,518 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 8 times [2018-11-18 12:28:54,518 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:28:54,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:28:54,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:54,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:28:54,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2018-11-18 12:28:54,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:28:54,709 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 [2018-11-18 12:28:54,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:28:54,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:28:54,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:28:54,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:28:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2018-11-18 12:28:54,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:28:54,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-18 12:28:54,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 12:28:54,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 12:28:54,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2018-11-18 12:28:54,802 INFO L87 Difference]: Start difference. First operand 75 states and 99 transitions. Second operand 21 states. [2018-11-18 12:28:55,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:28:55,245 INFO L93 Difference]: Finished difference Result 148 states and 193 transitions. [2018-11-18 12:28:55,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-18 12:28:55,245 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 173 [2018-11-18 12:28:55,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:28:55,247 INFO L225 Difference]: With dead ends: 148 [2018-11-18 12:28:55,247 INFO L226 Difference]: Without dead ends: 103 [2018-11-18 12:28:55,248 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=536, Invalid=2544, Unknown=0, NotChecked=0, Total=3080 [2018-11-18 12:28:55,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-18 12:28:55,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2018-11-18 12:28:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-11-18 12:28:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 108 transitions. [2018-11-18 12:28:55,256 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 108 transitions. Word has length 173 [2018-11-18 12:28:55,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:28:55,256 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 108 transitions. [2018-11-18 12:28:55,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 12:28:55,257 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 108 transitions. [2018-11-18 12:28:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-11-18 12:28:55,258 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:28:55,258 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:28:55,258 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:28:55,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:28:55,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 9 times [2018-11-18 12:28:55,258 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:28:55,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:28:55,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:55,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:28:55,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2018-11-18 12:28:55,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:28:55,644 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 [2018-11-18 12:28:55,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:28:55,680 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-18 12:28:55,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:28:55,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:28:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2018-11-18 12:28:55,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:28:55,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-18 12:28:55,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-18 12:28:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-18 12:28:55,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-18 12:28:55,761 INFO L87 Difference]: Start difference. First operand 80 states and 108 transitions. Second operand 23 states. [2018-11-18 12:28:56,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:28:56,343 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2018-11-18 12:28:56,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-18 12:28:56,343 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 186 [2018-11-18 12:28:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:28:56,344 INFO L225 Difference]: With dead ends: 129 [2018-11-18 12:28:56,344 INFO L226 Difference]: Without dead ends: 125 [2018-11-18 12:28:56,344 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 192 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=1833, Unknown=0, NotChecked=0, Total=1980 [2018-11-18 12:28:56,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-11-18 12:28:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2018-11-18 12:28:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-18 12:28:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2018-11-18 12:28:56,350 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 186 [2018-11-18 12:28:56,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:28:56,350 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2018-11-18 12:28:56,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-18 12:28:56,351 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2018-11-18 12:28:56,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-11-18 12:28:56,351 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:28:56,352 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:28:56,352 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:28:56,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:28:56,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2090243986, now seen corresponding path program 10 times [2018-11-18 12:28:56,352 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:28:56,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:28:56,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:56,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:28:56,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2018-11-18 12:28:56,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:28:56,539 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 [2018-11-18 12:28:56,545 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:28:56,596 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:28:56,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:28:56,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:28:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2018-11-18 12:28:56,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:28:56,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-18 12:28:56,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-18 12:28:56,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-18 12:28:56,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2018-11-18 12:28:56,661 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand 23 states. [2018-11-18 12:28:57,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:28:57,089 INFO L93 Difference]: Finished difference Result 216 states and 284 transitions. [2018-11-18 12:28:57,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-18 12:28:57,089 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 199 [2018-11-18 12:28:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:28:57,091 INFO L225 Difference]: With dead ends: 216 [2018-11-18 12:28:57,091 INFO L226 Difference]: Without dead ends: 121 [2018-11-18 12:28:57,092 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=368, Invalid=1984, Unknown=0, NotChecked=0, Total=2352 [2018-11-18 12:28:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-11-18 12:28:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 85. [2018-11-18 12:28:57,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-18 12:28:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2018-11-18 12:28:57,100 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 199 [2018-11-18 12:28:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:28:57,101 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2018-11-18 12:28:57,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-18 12:28:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2018-11-18 12:28:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-11-18 12:28:57,102 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:28:57,102 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 17, 14, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:28:57,102 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:28:57,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:28:57,102 INFO L82 PathProgramCache]: Analyzing trace with hash 469178039, now seen corresponding path program 11 times [2018-11-18 12:28:57,103 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:28:57,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:28:57,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:57,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:28:57,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 258 proven. 785 refuted. 0 times theorem prover too weak. 1277 trivial. 0 not checked. [2018-11-18 12:28:57,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:28:57,259 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 [2018-11-18 12:28:57,266 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 12:28:57,297 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-18 12:28:57,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:28:57,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:28:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1296 proven. 226 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2018-11-18 12:28:57,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:28:57,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2018-11-18 12:28:57,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-18 12:28:57,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-18 12:28:57,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2018-11-18 12:28:57,449 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand 29 states. [2018-11-18 12:28:57,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:28:57,993 INFO L93 Difference]: Finished difference Result 219 states and 316 transitions. [2018-11-18 12:28:57,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-18 12:28:57,993 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 212 [2018-11-18 12:28:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:28:57,995 INFO L225 Difference]: With dead ends: 219 [2018-11-18 12:28:57,995 INFO L226 Difference]: Without dead ends: 122 [2018-11-18 12:28:57,996 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=507, Invalid=2915, Unknown=0, NotChecked=0, Total=3422 [2018-11-18 12:28:57,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-11-18 12:28:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2018-11-18 12:28:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-11-18 12:28:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2018-11-18 12:28:58,003 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 212 [2018-11-18 12:28:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:28:58,004 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2018-11-18 12:28:58,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-18 12:28:58,004 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2018-11-18 12:28:58,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-11-18 12:28:58,005 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:28:58,005 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:28:58,005 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:28:58,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:28:58,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024914, now seen corresponding path program 12 times [2018-11-18 12:28:58,006 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:28:58,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:28:58,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:58,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:28:58,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:28:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:28:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 507 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2018-11-18 12:28:58,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:28:58,126 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/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 [2018-11-18 12:28:58,138 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 12:28:58,267 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-11-18 12:28:58,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:28:58,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:28:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 210 proven. 398 refuted. 0 times theorem prover too weak. 3721 trivial. 0 not checked. [2018-11-18 12:28:58,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:28:58,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2018-11-18 12:28:58,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 12:28:58,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 12:28:58,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-11-18 12:28:58,388 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand 13 states. [2018-11-18 12:28:58,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:28:58,514 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2018-11-18 12:28:58,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 12:28:58,514 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 284 [2018-11-18 12:28:58,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:28:58,515 INFO L225 Difference]: With dead ends: 114 [2018-11-18 12:28:58,515 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 12:28:58,516 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2018-11-18 12:28:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 12:28:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 12:28:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 12:28:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 12:28:58,516 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 284 [2018-11-18 12:28:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:28:58,517 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 12:28:58,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 12:28:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 12:28:58,517 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 12:28:58,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 12:28:58,607 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,612 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,613 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,614 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,625 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,658 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,659 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,667 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,667 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,668 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,706 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,706 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,707 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,751 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,752 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,752 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,809 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,810 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,810 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,878 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,953 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:58,994 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:28:59,319 WARN L180 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 15 [2018-11-18 12:29:00,326 WARN L180 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 198 DAG size of output: 59 [2018-11-18 12:29:00,411 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 12:29:00,411 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 12:29:00,411 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 12:29:00,412 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 12:29:00,412 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 12:29:00,412 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 12:29:00,412 INFO L425 ceAbstractionStarter]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-18 12:29:00,412 INFO L428 ceAbstractionStarter]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2018-11-18 12:29:00,412 INFO L421 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~m| ackermann_~m) (= ackermann_~n |ackermann_#in~n|) (not (= |ackermann_#in~n| 0)) (or (< |ackermann_#in~m| 0) (< 0 |ackermann_#in~m|))) [2018-11-18 12:29:00,412 INFO L425 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-11-18 12:29:00,412 INFO L421 ceAbstractionStarter]: At program point L19(line 19) the Hoare annotation is: (and (<= |ackermann_#in~n| 0) (= |ackermann_#in~m| ackermann_~m) (= ackermann_~n |ackermann_#in~n|) (<= 0 |ackermann_#in~n|)) [2018-11-18 12:29:00,412 INFO L421 ceAbstractionStarter]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse5 (= |ackermann_#in~m| ackermann_~m)) (.cse6 (<= |ackermann_#in~n| ackermann_~n)) (.cse7 (<= 2 |ackermann_#t~ret1|))) (let ((.cse4 (= ackermann_~n |ackermann_#in~n|)) (.cse1 (and .cse5 .cse6 (<= |ackermann_#in~n| 1) .cse7)) (.cse3 (<= 5 |ackermann_#t~ret1|)) (.cse2 (<= 2 |ackermann_#in~m|))) (and (let ((.cse0 (and .cse5 .cse6 .cse7))) (or (and (<= 4 |ackermann_#t~ret1|) .cse0 (<= |ackermann_#in~n| 3)) (and (<= 3 |ackermann_#t~ret1|) (<= |ackermann_#in~n| 2) .cse0) .cse1 (and .cse0 .cse2) (and .cse3 .cse0 .cse4))) (let ((.cse11 (<= ackermann_~n |ackermann_#in~n|))) (let ((.cse12 (<= 1 |ackermann_#in~n|)) (.cse14 (<= 3 |ackermann_#in~n|)) (.cse8 (<= 1 |ackermann_#in~m|)) (.cse10 (<= |ackermann_#in~m| 1)) (.cse15 (<= 2 |ackermann_#in~n|)) (.cse9 (<= |ackermann_#t~ret1| 5)) (.cse13 (and .cse3 .cse11 .cse2))) (or (and .cse8 (<= |ackermann_#in~n| 4) .cse9 (<= 4 |ackermann_#in~n|) .cse10) (and .cse8 .cse10 (<= |ackermann_#t~ret1| 6) (<= 6 |ackermann_#t~ret1|) (<= 5 |ackermann_#in~n|)) (and .cse8 .cse11 .cse12 .cse10 (<= |ackermann_#t~ret1| 2)) (and (= |ackermann_#t~ret1| 3) .cse4 .cse12 .cse1 .cse2) (and .cse8 .cse10 (<= 6 |ackermann_#in~n|)) (and .cse13 .cse14) (and .cse8 .cse11 .cse14 .cse10 (<= |ackermann_#t~ret1| 4)) (<= 3 |ackermann_#in~m|) (and .cse15 .cse8 .cse11 .cse10 (<= |ackermann_#t~ret1| 3)) (and .cse15 .cse9 .cse13))))))) [2018-11-18 12:29:00,413 INFO L425 ceAbstractionStarter]: For program point L18(lines 18 20) no Hoare annotation was computed. [2018-11-18 12:29:00,413 INFO L425 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2018-11-18 12:29:00,413 INFO L425 ceAbstractionStarter]: For program point L21-3(line 21) no Hoare annotation was computed. [2018-11-18 12:29:00,413 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-11-18 12:29:00,413 INFO L425 ceAbstractionStarter]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-18 12:29:00,413 INFO L425 ceAbstractionStarter]: For program point L33(lines 33 38) no Hoare annotation was computed. [2018-11-18 12:29:00,413 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2018-11-18 12:29:00,413 INFO L425 ceAbstractionStarter]: For program point L27(lines 27 31) no Hoare annotation was computed. [2018-11-18 12:29:00,413 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2018-11-18 12:29:00,413 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2018-11-18 12:29:00,413 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2018-11-18 12:29:00,413 INFO L425 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2018-11-18 12:29:00,414 INFO L425 ceAbstractionStarter]: For program point L40(lines 40 44) no Hoare annotation was computed. [2018-11-18 12:29:00,414 INFO L428 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: true [2018-11-18 12:29:00,414 INFO L425 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2018-11-18 12:29:00,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 12:29:00 BoogieIcfgContainer [2018-11-18 12:29:00,416 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 12:29:00,416 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 12:29:00,417 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 12:29:00,417 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 12:29:00,417 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:28:50" (3/4) ... [2018-11-18 12:29:00,420 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 12:29:00,426 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 12:29:00,427 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2018-11-18 12:29:00,427 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 12:29:00,430 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 12:29:00,430 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 12:29:00,431 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 12:29:00,466 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_bc2f5502-a174-4ccf-b97d-a9ff2f10a552/bin-2019/uautomizer/witness.graphml [2018-11-18 12:29:00,467 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 12:29:00,467 INFO L168 Benchmark]: Toolchain (without parser) took 10524.72 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 337.6 MB). Free memory was 958.2 MB in the beginning and 1.2 GB in the end (delta: -206.0 MB). Peak memory consumption was 131.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:29:00,468 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:29:00,468 INFO L168 Benchmark]: CACSL2BoogieTranslator took 151.80 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:29:00,468 INFO L168 Benchmark]: Boogie Preprocessor took 17.57 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:29:00,469 INFO L168 Benchmark]: RCFGBuilder took 178.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -170.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 11.5 GB. [2018-11-18 12:29:00,469 INFO L168 Benchmark]: TraceAbstraction took 10124.13 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 208.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -58.5 MB). Peak memory consumption was 484.3 MB. Max. memory is 11.5 GB. [2018-11-18 12:29:00,469 INFO L168 Benchmark]: Witness Printer took 50.18 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2018-11-18 12:29:00,471 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 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 151.80 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.57 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 178.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -170.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10124.13 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 208.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -58.5 MB). Peak memory consumption was 484.3 MB. Max. memory is 11.5 GB. * Witness Printer took 50.18 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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, 27 locations, 1 error locations. SAFE Result, 10.0s OverallTime, 14 OverallIterations, 42 TraceHistogramMax, 4.2s AutomataDifference, 0.0s DeadEndRemovalTime, 1.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 426 SDtfs, 403 SDslu, 2300 SDs, 0 SdLazy, 4904 SolverSat, 790 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2514 GetRequests, 2091 SyntacticMatches, 9 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3581 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 210 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 553 PreInvPairs, 1245 NumberOfFragments, 270 HoareAnnotationTreeSize, 553 FomulaSimplifications, 358797 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 9 FomulaSimplificationsInter, 50526 FormulaSimplificationTreeSizeReductionInter, 1.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 4049 NumberOfCodeBlocks, 3600 NumberOfCodeBlocksAsserted, 94 NumberOfCheckSat, 4022 ConstructedInterpolants, 0 QuantifiedInterpolants, 1257923 SizeOfPredicates, 98 NumberOfNonLiveVariables, 4600 ConjunctsInSsa, 345 ConjunctsInUnsatCore, 27 InterpolantComputations, 1 PerfectInterpolantSequences, 31537/38210 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...