./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/sum_15x0_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_15x0_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/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 31319b3dce926b7eddaa50d24c240f6870931f21 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 07:29:06,607 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 07:29:06,609 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 07:29:06,617 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 07:29:06,617 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 07:29:06,618 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 07:29:06,619 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 07:29:06,620 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 07:29:06,621 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 07:29:06,622 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 07:29:06,622 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 07:29:06,623 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 07:29:06,623 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 07:29:06,624 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 07:29:06,624 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 07:29:06,625 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 07:29:06,625 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 07:29:06,627 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 07:29:06,628 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 07:29:06,629 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 07:29:06,630 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 07:29:06,631 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 07:29:06,633 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 07:29:06,633 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 07:29:06,633 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 07:29:06,634 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 07:29:06,635 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 07:29:06,635 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 07:29:06,636 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 07:29:06,637 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 07:29:06,637 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 07:29:06,637 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 07:29:06,637 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 07:29:06,638 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 07:29:06,638 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 07:29:06,639 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 07:29:06,639 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 07:29:06,650 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 07:29:06,650 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 07:29:06,651 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 07:29:06,651 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 07:29:06,651 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 07:29:06,652 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 07:29:06,652 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 07:29:06,652 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 07:29:06,652 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 07:29:06,652 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 07:29:06,652 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 07:29:06,653 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 07:29:06,653 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 07:29:06,653 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 07:29:06,653 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 07:29:06,653 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 07:29:06,653 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 07:29:06,653 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 07:29:06,653 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 07:29:06,654 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 07:29:06,654 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 07:29:06,654 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 07:29:06,654 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 07:29:06,654 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 07:29:06,654 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 07:29:06,654 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 07:29:06,655 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 07:29:06,655 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 07:29:06,655 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 07:29:06,655 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_8825174a-251d-429a-b4eb-43d47b33d617/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 -> 31319b3dce926b7eddaa50d24c240f6870931f21 [2018-11-10 07:29:06,680 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 07:29:06,690 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 07:29:06,693 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 07:29:06,694 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 07:29:06,694 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 07:29:06,695 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_15x0_false-unreach-call_true-termination.c [2018-11-10 07:29:06,742 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/data/e40de7573/269b1b8416a84de99ef77c38173422cf/FLAG29bbffa1a [2018-11-10 07:29:07,079 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 07:29:07,080 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/sv-benchmarks/c/recursive-simple/sum_15x0_false-unreach-call_true-termination.c [2018-11-10 07:29:07,083 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/data/e40de7573/269b1b8416a84de99ef77c38173422cf/FLAG29bbffa1a [2018-11-10 07:29:07,093 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/data/e40de7573/269b1b8416a84de99ef77c38173422cf [2018-11-10 07:29:07,095 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 07:29:07,096 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 07:29:07,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 07:29:07,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 07:29:07,100 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 07:29:07,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:29:07" (1/1) ... [2018-11-10 07:29:07,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ac897aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:29:07, skipping insertion in model container [2018-11-10 07:29:07,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:29:07" (1/1) ... [2018-11-10 07:29:07,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 07:29:07,126 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 07:29:07,251 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:29:07,253 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 07:29:07,264 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:29:07,272 INFO L193 MainTranslator]: Completed translation [2018-11-10 07:29:07,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:29:07 WrapperNode [2018-11-10 07:29:07,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 07:29:07,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 07:29:07,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 07:29:07,273 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 07:29:07,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:29:07" (1/1) ... [2018-11-10 07:29:07,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:29:07" (1/1) ... [2018-11-10 07:29:07,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:29:07" (1/1) ... [2018-11-10 07:29:07,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:29:07" (1/1) ... [2018-11-10 07:29:07,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:29:07" (1/1) ... [2018-11-10 07:29:07,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:29:07" (1/1) ... [2018-11-10 07:29:07,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:29:07" (1/1) ... [2018-11-10 07:29:07,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 07:29:07,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 07:29:07,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 07:29:07,288 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 07:29:07,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:29:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 07:29:07,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 07:29:07,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 07:29:07,363 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-10 07:29:07,363 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 07:29:07,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 07:29:07,363 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-10 07:29:07,363 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 07:29:07,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 07:29:07,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 07:29:07,462 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 07:29:07,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:29:07 BoogieIcfgContainer [2018-11-10 07:29:07,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 07:29:07,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 07:29:07,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 07:29:07,465 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 07:29:07,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 07:29:07" (1/3) ... [2018-11-10 07:29:07,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3f7989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 07:29:07, skipping insertion in model container [2018-11-10 07:29:07,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:29:07" (2/3) ... [2018-11-10 07:29:07,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3f7989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 07:29:07, skipping insertion in model container [2018-11-10 07:29:07,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:29:07" (3/3) ... [2018-11-10 07:29:07,467 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_15x0_false-unreach-call_true-termination.c [2018-11-10 07:29:07,473 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 07:29:07,478 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 07:29:07,487 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 07:29:07,506 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 07:29:07,507 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 07:29:07,507 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 07:29:07,507 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 07:29:07,507 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 07:29:07,507 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 07:29:07,507 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 07:29:07,507 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 07:29:07,507 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 07:29:07,519 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-10 07:29:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 07:29:07,522 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:07,523 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:07,524 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:07,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:07,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-11-10 07:29:07,529 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:07,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:07,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:07,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:29:07,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:29:07,648 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:29:07,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 07:29:07,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 07:29:07,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 07:29:07,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 07:29:07,661 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-10 07:29:07,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:07,737 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-10 07:29:07,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 07:29:07,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 07:29:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:07,744 INFO L225 Difference]: With dead ends: 30 [2018-11-10 07:29:07,744 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 07:29:07,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 07:29:07,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 07:29:07,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 07:29:07,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 07:29:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-10 07:29:07,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-10 07:29:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:07,774 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-10 07:29:07,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 07:29:07,774 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-10 07:29:07,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 07:29:07,775 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:07,776 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:07,776 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:07,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:07,776 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-11-10 07:29:07,776 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:07,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:07,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:07,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:29:07,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 07:29:07,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:29:07,841 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:29:07,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:29:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:07,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:29:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 07:29:07,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:29:07,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-10 07:29:07,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 07:29:07,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 07:29:07,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-10 07:29:07,925 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-10 07:29:07,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:07,981 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-10 07:29:07,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 07:29:07,981 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-10 07:29:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:07,982 INFO L225 Difference]: With dead ends: 25 [2018-11-10 07:29:07,982 INFO L226 Difference]: Without dead ends: 21 [2018-11-10 07:29:07,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-10 07:29:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-10 07:29:07,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-10 07:29:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 07:29:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-10 07:29:07,987 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-10 07:29:07,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:07,987 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-10 07:29:07,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 07:29:07,987 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-10 07:29:07,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 07:29:07,988 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:07,988 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:07,988 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:07,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:07,989 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-11-10 07:29:07,989 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:07,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:07,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:07,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:29:07,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 07:29:08,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:29:08,050 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:29:08,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 07:29:08,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 07:29:08,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:29:08,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:29:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 07:29:08,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:29:08,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-10 07:29:08,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 07:29:08,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 07:29:08,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-10 07:29:08,106 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-10 07:29:08,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:08,180 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-10 07:29:08,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 07:29:08,180 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-10 07:29:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:08,189 INFO L225 Difference]: With dead ends: 28 [2018-11-10 07:29:08,189 INFO L226 Difference]: Without dead ends: 24 [2018-11-10 07:29:08,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-10 07:29:08,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-10 07:29:08,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-10 07:29:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 07:29:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-10 07:29:08,194 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-10 07:29:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:08,194 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-10 07:29:08,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 07:29:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-10 07:29:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-10 07:29:08,195 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:08,196 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:08,196 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:08,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:08,196 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2018-11-10 07:29:08,196 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:08,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:08,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:08,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:29:08,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 07:29:08,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:29:08,291 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:29:08,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 07:29:08,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 07:29:08,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:29:08,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:29:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 07:29:08,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:29:08,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-10 07:29:08,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 07:29:08,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 07:29:08,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-10 07:29:08,366 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-10 07:29:08,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:08,430 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-10 07:29:08,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 07:29:08,430 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-10 07:29:08,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:08,431 INFO L225 Difference]: With dead ends: 31 [2018-11-10 07:29:08,431 INFO L226 Difference]: Without dead ends: 27 [2018-11-10 07:29:08,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-10 07:29:08,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-10 07:29:08,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-10 07:29:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-10 07:29:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-10 07:29:08,437 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-10 07:29:08,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:08,437 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-10 07:29:08,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 07:29:08,438 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-10 07:29:08,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-10 07:29:08,439 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:08,439 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:08,439 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:08,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:08,439 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2018-11-10 07:29:08,439 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:08,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:08,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:08,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:29:08,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 07:29:08,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:29:08,530 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:29:08,537 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 07:29:08,551 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 07:29:08,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:29:08,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:29:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 07:29:08,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:29:08,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-10 07:29:08,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 07:29:08,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 07:29:08,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-10 07:29:08,585 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-10 07:29:08,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:08,654 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-10 07:29:08,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 07:29:08,654 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-10 07:29:08,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:08,655 INFO L225 Difference]: With dead ends: 34 [2018-11-10 07:29:08,655 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 07:29:08,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-10 07:29:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 07:29:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-10 07:29:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 07:29:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-10 07:29:08,659 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-10 07:29:08,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:08,660 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-10 07:29:08,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 07:29:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-10 07:29:08,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-10 07:29:08,661 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:08,661 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:08,661 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:08,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:08,661 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2018-11-10 07:29:08,661 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:08,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:08,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:08,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:29:08,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 07:29:08,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:29:08,744 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:29:08,752 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 07:29:08,776 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-10 07:29:08,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:29:08,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:29:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 07:29:08,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:29:08,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-10 07:29:08,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 07:29:08,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 07:29:08,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-10 07:29:08,816 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-10 07:29:08,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:08,905 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-10 07:29:08,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 07:29:08,905 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-10 07:29:08,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:08,906 INFO L225 Difference]: With dead ends: 37 [2018-11-10 07:29:08,906 INFO L226 Difference]: Without dead ends: 33 [2018-11-10 07:29:08,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-10 07:29:08,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-10 07:29:08,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-10 07:29:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 07:29:08,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-10 07:29:08,911 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-10 07:29:08,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:08,912 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-10 07:29:08,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 07:29:08,912 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-10 07:29:08,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 07:29:08,913 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:08,913 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:08,913 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:08,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:08,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2018-11-10 07:29:08,914 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:08,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:08,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:08,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:29:08,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 07:29:09,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:29:09,010 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:29:09,015 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 07:29:09,035 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-10 07:29:09,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:29:09,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:29:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 07:29:09,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:29:09,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 07:29:09,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 07:29:09,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 07:29:09,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-10 07:29:09,072 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-10 07:29:09,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:09,153 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-10 07:29:09,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 07:29:09,153 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-10 07:29:09,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:09,154 INFO L225 Difference]: With dead ends: 40 [2018-11-10 07:29:09,154 INFO L226 Difference]: Without dead ends: 36 [2018-11-10 07:29:09,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-10 07:29:09,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-10 07:29:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-10 07:29:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-10 07:29:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-10 07:29:09,161 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-10 07:29:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:09,161 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-10 07:29:09,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 07:29:09,162 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-10 07:29:09,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-10 07:29:09,163 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:09,163 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:09,163 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:09,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:09,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2018-11-10 07:29:09,164 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:09,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:09,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:09,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:29:09,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 07:29:09,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:29:09,265 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:29:09,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:29:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:09,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:29:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 07:29:09,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:29:09,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-10 07:29:09,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 07:29:09,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 07:29:09,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-10 07:29:09,318 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-10 07:29:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:09,405 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-10 07:29:09,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 07:29:09,405 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-10 07:29:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:09,406 INFO L225 Difference]: With dead ends: 43 [2018-11-10 07:29:09,406 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 07:29:09,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-10 07:29:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 07:29:09,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-10 07:29:09,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 07:29:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-10 07:29:09,412 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-10 07:29:09,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:09,413 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-10 07:29:09,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 07:29:09,413 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-10 07:29:09,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 07:29:09,414 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:09,414 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:09,414 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:09,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:09,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2018-11-10 07:29:09,414 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:09,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:09,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:09,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:29:09,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 07:29:09,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:29:09,506 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:29:09,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 07:29:09,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 07:29:09,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:29:09,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:29:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 07:29:09,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:29:09,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-10 07:29:09,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 07:29:09,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 07:29:09,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-10 07:29:09,575 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-10 07:29:09,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:09,670 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-10 07:29:09,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 07:29:09,671 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-10 07:29:09,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:09,671 INFO L225 Difference]: With dead ends: 46 [2018-11-10 07:29:09,671 INFO L226 Difference]: Without dead ends: 42 [2018-11-10 07:29:09,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-10 07:29:09,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-10 07:29:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-10 07:29:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-10 07:29:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-10 07:29:09,677 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-10 07:29:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:09,678 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-10 07:29:09,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 07:29:09,678 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-10 07:29:09,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-10 07:29:09,678 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:09,679 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:09,679 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:09,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:09,679 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2018-11-10 07:29:09,679 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:09,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:09,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:09,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:29:09,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 07:29:09,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:29:09,772 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:29:09,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 07:29:09,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-10 07:29:09,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:29:09,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:29:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 07:29:09,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:29:09,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-10 07:29:09,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 07:29:09,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 07:29:09,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-10 07:29:09,878 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-10 07:29:10,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:10,001 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-10 07:29:10,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-10 07:29:10,001 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-10 07:29:10,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:10,001 INFO L225 Difference]: With dead ends: 49 [2018-11-10 07:29:10,001 INFO L226 Difference]: Without dead ends: 45 [2018-11-10 07:29:10,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-10 07:29:10,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-10 07:29:10,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-10 07:29:10,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 07:29:10,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-10 07:29:10,006 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-10 07:29:10,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:10,007 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-10 07:29:10,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 07:29:10,007 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-10 07:29:10,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 07:29:10,008 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:10,008 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:10,010 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:10,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:10,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2018-11-10 07:29:10,011 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:10,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:10,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:10,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:29:10,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 07:29:10,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:29:10,102 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:29:10,109 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 07:29:10,128 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 07:29:10,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:29:10,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:29:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 07:29:10,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:29:10,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-10 07:29:10,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 07:29:10,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 07:29:10,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-10 07:29:10,168 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-10 07:29:10,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:10,304 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-10 07:29:10,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 07:29:10,304 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-10 07:29:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:10,305 INFO L225 Difference]: With dead ends: 52 [2018-11-10 07:29:10,305 INFO L226 Difference]: Without dead ends: 48 [2018-11-10 07:29:10,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-10 07:29:10,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-10 07:29:10,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-10 07:29:10,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-10 07:29:10,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-10 07:29:10,309 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-10 07:29:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:10,309 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-10 07:29:10,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 07:29:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-10 07:29:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-10 07:29:10,310 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:10,310 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:10,311 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:10,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:10,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2018-11-10 07:29:10,311 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:10,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:10,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:10,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:29:10,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-10 07:29:10,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:29:10,419 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/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 [2018-11-10 07:29:10,426 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 07:29:10,456 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-10 07:29:10,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:29:10,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:29:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-10 07:29:10,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:29:10,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-10 07:29:10,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 07:29:10,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 07:29:10,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-10 07:29:10,502 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-10 07:29:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:10,614 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-10 07:29:10,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 07:29:10,614 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-10 07:29:10,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:10,615 INFO L225 Difference]: With dead ends: 55 [2018-11-10 07:29:10,615 INFO L226 Difference]: Without dead ends: 51 [2018-11-10 07:29:10,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-10 07:29:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-10 07:29:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-10 07:29:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-10 07:29:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-10 07:29:10,620 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-10 07:29:10,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:10,621 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-10 07:29:10,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 07:29:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-10 07:29:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-10 07:29:10,622 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:10,622 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:10,622 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:10,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:10,623 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2018-11-10 07:29:10,623 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:10,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:10,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:10,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:29:10,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-10 07:29:10,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:29:10,726 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/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 [2018-11-10 07:29:10,741 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 07:29:10,799 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-10 07:29:10,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:29:10,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:29:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-10 07:29:10,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:29:10,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-10 07:29:10,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 07:29:10,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 07:29:10,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-10 07:29:10,850 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-10 07:29:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:11,035 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-10 07:29:11,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 07:29:11,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-10 07:29:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:11,036 INFO L225 Difference]: With dead ends: 58 [2018-11-10 07:29:11,037 INFO L226 Difference]: Without dead ends: 54 [2018-11-10 07:29:11,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-10 07:29:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-10 07:29:11,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-10 07:29:11,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-10 07:29:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-10 07:29:11,042 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-10 07:29:11,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:11,043 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-10 07:29:11,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 07:29:11,043 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-10 07:29:11,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-10 07:29:11,044 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:11,046 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:11,046 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:11,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:11,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2018-11-10 07:29:11,047 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:11,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:11,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:11,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:29:11,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-10 07:29:11,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:29:11,164 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/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 [2018-11-10 07:29:11,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:29:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:11,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:29:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-10 07:29:11,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:29:11,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-10 07:29:11,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 07:29:11,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 07:29:11,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-10 07:29:11,238 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-10 07:29:11,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:11,421 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-10 07:29:11,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 07:29:11,421 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-10 07:29:11,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:11,422 INFO L225 Difference]: With dead ends: 61 [2018-11-10 07:29:11,422 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 07:29:11,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-10 07:29:11,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 07:29:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-10 07:29:11,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-10 07:29:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-10 07:29:11,426 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-10 07:29:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:11,427 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-10 07:29:11,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 07:29:11,427 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-10 07:29:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-10 07:29:11,428 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:11,428 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:11,428 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:11,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:11,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2018-11-10 07:29:11,431 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:11,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:11,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:11,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:29:11,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:29:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 07:29:11,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:29:11,563 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:29:11,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 07:29:11,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 07:29:11,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:29:11,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:29:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 07:29:11,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:29:11,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-10 07:29:11,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 07:29:11,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 07:29:11,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-10 07:29:11,628 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-10 07:29:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:29:11,773 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-10 07:29:11,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 07:29:11,774 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-10 07:29:11,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:29:11,774 INFO L225 Difference]: With dead ends: 64 [2018-11-10 07:29:11,774 INFO L226 Difference]: Without dead ends: 60 [2018-11-10 07:29:11,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-11-10 07:29:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-10 07:29:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-10 07:29:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-10 07:29:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-10 07:29:11,779 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-10 07:29:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:29:11,780 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-10 07:29:11,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 07:29:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-10 07:29:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-10 07:29:11,781 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:29:11,781 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:29:11,781 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:29:11,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:29:11,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2018-11-10 07:29:11,781 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:29:11,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:29:11,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:11,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:29:11,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:29:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 07:29:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 07:29:11,824 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 07:29:11,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 07:29:11 BoogieIcfgContainer [2018-11-10 07:29:11,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 07:29:11,854 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 07:29:11,854 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 07:29:11,855 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 07:29:11,855 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:29:07" (3/4) ... [2018-11-10 07:29:11,857 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 07:29:11,905 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8825174a-251d-429a-b4eb-43d47b33d617/bin-2019/uautomizer/witness.graphml [2018-11-10 07:29:11,905 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 07:29:11,906 INFO L168 Benchmark]: Toolchain (without parser) took 4810.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 959.2 MB in the beginning and 1.0 GB in the end (delta: -57.5 MB). Peak memory consumption was 123.4 MB. Max. memory is 11.5 GB. [2018-11-10 07:29:11,908 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. [2018-11-10 07:29:11,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.11 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 947.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. [2018-11-10 07:29:11,908 INFO L168 Benchmark]: Boogie Preprocessor took 15.20 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 07:29:11,908 INFO L168 Benchmark]: RCFGBuilder took 174.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -179.1 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. [2018-11-10 07:29:11,909 INFO L168 Benchmark]: TraceAbstraction took 4391.20 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 45.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 104.5 MB). Peak memory consumption was 149.6 MB. Max. memory is 11.5 GB. [2018-11-10 07:29:11,909 INFO L168 Benchmark]: Witness Printer took 50.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 11.5 GB. [2018-11-10 07:29:11,911 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 176.11 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 947.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.20 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 174.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -179.1 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4391.20 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 45.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 104.5 MB). Peak memory consumption was 149.6 MB. Max. memory is 11.5 GB. * Witness Printer took 50.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 15; [L13] int b = 0; VAL [a=15, b=0] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=15, m=0, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=14, m=1, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=13, m=2, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=12, m=3, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=11, m=4, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=10, m=5, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=9, m=6, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=8, m=7, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=7, m=8, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=6, m=9, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=5, m=10, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=4, m=11, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=3, m=12, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=2, m=13, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=1, m=14, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=0] [L4] COND TRUE n <= 0 [L5] RET return m + n; VAL [\old(m)=15, \old(n)=0, \result=15, m=15, n=0] [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1, m=14, n=1, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2, m=13, n=2, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3, m=12, n=3, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4, m=11, n=4, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5, m=10, n=5, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6, m=9, n=6, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7, m=8, n=7, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8, m=7, n=8, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9, m=6, n=9, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10, m=5, n=10, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11, m=4, n=11, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12, m=3, n=12, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13, m=2, n=13, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14, m=1, n=14, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=15, m=0, n=15, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L14] EXPR sum(a, b) VAL [a=15, b=0, sum(a, b)=15] [L14] int result = sum(a, b); [L15] COND TRUE result == a + b VAL [a=15, b=0, result=15] [L16] __VERIFIER_error() VAL [a=15, b=0, result=15] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 4.3s OverallTime, 16 OverallIterations, 16 TraceHistogramMax, 1.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 183 SDtfs, 318 SDslu, 1152 SDs, 0 SdLazy, 900 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1203 GetRequests, 933 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, 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: 0.0s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 1740 NumberOfCodeBlocks, 1740 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 1608 ConstructedInterpolants, 0 QuantifiedInterpolants, 267360 SizeOfPredicates, 133 NumberOfNonLiveVariables, 2408 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 29 InterpolantComputations, 1 PerfectInterpolantSequences, 3150/6300 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...