./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_i20_o20_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i20_o20_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/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 4d7026bf672987d88e3a6ea48c2c5a690fd9a5f2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 15:16:10,682 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 15:16:10,683 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 15:16:10,691 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 15:16:10,691 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 15:16:10,691 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 15:16:10,692 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 15:16:10,693 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 15:16:10,694 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 15:16:10,695 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 15:16:10,695 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 15:16:10,696 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 15:16:10,696 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 15:16:10,697 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 15:16:10,698 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 15:16:10,698 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 15:16:10,699 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 15:16:10,700 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 15:16:10,701 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 15:16:10,702 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 15:16:10,702 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 15:16:10,703 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 15:16:10,705 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 15:16:10,705 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 15:16:10,705 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 15:16:10,705 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 15:16:10,706 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 15:16:10,706 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 15:16:10,707 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 15:16:10,708 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 15:16:10,708 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 15:16:10,708 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 15:16:10,708 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 15:16:10,709 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 15:16:10,709 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 15:16:10,710 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 15:16:10,710 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-18 15:16:10,717 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 15:16:10,717 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 15:16:10,718 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 15:16:10,718 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 15:16:10,718 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 15:16:10,719 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 15:16:10,719 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 15:16:10,719 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 15:16:10,719 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 15:16:10,719 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 15:16:10,719 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 15:16:10,719 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 15:16:10,720 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 15:16:10,720 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 15:16:10,720 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 15:16:10,720 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 15:16:10,720 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 15:16:10,720 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 15:16:10,720 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 15:16:10,721 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 15:16:10,721 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 15:16:10,721 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 15:16:10,721 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 15:16:10,721 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:16:10,721 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 15:16:10,721 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 15:16:10,721 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 15:16:10,722 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 15:16:10,722 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 15:16:10,722 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 15:16:10,722 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_b08bff7a-0ae9-4493-8c60-8257146beb4a/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 -> 4d7026bf672987d88e3a6ea48c2c5a690fd9a5f2 [2018-11-18 15:16:10,745 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 15:16:10,753 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 15:16:10,756 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 15:16:10,757 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 15:16:10,757 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 15:16:10,758 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i20_o20_true-unreach-call_true-termination.c [2018-11-18 15:16:10,803 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/data/563b9a849/c6e6298418de4abe8ba50436c35680ec/FLAGe7cf3aa76 [2018-11-18 15:16:11,198 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 15:16:11,198 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/sv-benchmarks/c/recursive-simple/id_i20_o20_true-unreach-call_true-termination.c [2018-11-18 15:16:11,202 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/data/563b9a849/c6e6298418de4abe8ba50436c35680ec/FLAGe7cf3aa76 [2018-11-18 15:16:11,214 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/data/563b9a849/c6e6298418de4abe8ba50436c35680ec [2018-11-18 15:16:11,217 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 15:16:11,219 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 15:16:11,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 15:16:11,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 15:16:11,223 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 15:16:11,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:16:11" (1/1) ... [2018-11-18 15:16:11,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e779c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:16:11, skipping insertion in model container [2018-11-18 15:16:11,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:16:11" (1/1) ... [2018-11-18 15:16:11,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 15:16:11,247 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 15:16:11,351 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:16:11,353 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 15:16:11,362 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:16:11,370 INFO L195 MainTranslator]: Completed translation [2018-11-18 15:16:11,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:16:11 WrapperNode [2018-11-18 15:16:11,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 15:16:11,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 15:16:11,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 15:16:11,371 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 15:16:11,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:16:11" (1/1) ... [2018-11-18 15:16:11,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:16:11" (1/1) ... [2018-11-18 15:16:11,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:16:11" (1/1) ... [2018-11-18 15:16:11,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:16:11" (1/1) ... [2018-11-18 15:16:11,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:16:11" (1/1) ... [2018-11-18 15:16:11,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:16:11" (1/1) ... [2018-11-18 15:16:11,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:16:11" (1/1) ... [2018-11-18 15:16:11,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 15:16:11,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 15:16:11,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 15:16:11,386 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 15:16:11,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:16:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:16:11,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 15:16:11,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 15:16:11,454 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-18 15:16:11,454 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 15:16:11,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 15:16:11,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 15:16:11,454 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-18 15:16:11,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 15:16:11,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 15:16:11,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 15:16:11,559 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 15:16:11,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:16:11 BoogieIcfgContainer [2018-11-18 15:16:11,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 15:16:11,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 15:16:11,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 15:16:11,562 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 15:16:11,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 03:16:11" (1/3) ... [2018-11-18 15:16:11,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43527e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:16:11, skipping insertion in model container [2018-11-18 15:16:11,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:16:11" (2/3) ... [2018-11-18 15:16:11,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43527e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:16:11, skipping insertion in model container [2018-11-18 15:16:11,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:16:11" (3/3) ... [2018-11-18 15:16:11,565 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i20_o20_true-unreach-call_true-termination.c [2018-11-18 15:16:11,571 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 15:16:11,576 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 15:16:11,587 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 15:16:11,604 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 15:16:11,605 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 15:16:11,605 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 15:16:11,605 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 15:16:11,605 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 15:16:11,605 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 15:16:11,606 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 15:16:11,606 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 15:16:11,606 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 15:16:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 15:16:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 15:16:11,625 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:11,626 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:11,628 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:11,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:11,632 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-18 15:16:11,634 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:11,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:11,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:11,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:16:11,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:16:11,749 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:16:11,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 15:16:11,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:16:11,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:16:11,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:16:11,761 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-18 15:16:11,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:11,807 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-18 15:16:11,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 15:16:11,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 15:16:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:11,814 INFO L225 Difference]: With dead ends: 30 [2018-11-18 15:16:11,814 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 15:16:11,816 INFO L604 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 [2018-11-18 15:16:11,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 15:16:11,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 15:16:11,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 15:16:11,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-18 15:16:11,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-18 15:16:11,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:11,845 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-18 15:16:11,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:16:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-18 15:16:11,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 15:16:11,846 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:11,846 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:11,846 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:11,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:11,847 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-18 15:16:11,847 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:11,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:11,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:11,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:16:11,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 15:16:11,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:11,905 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:11,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:16:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:11,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 15:16:11,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:11,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-18 15:16:11,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 15:16:11,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 15:16:11,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 15:16:11,972 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-18 15:16:12,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:12,044 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-18 15:16:12,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 15:16:12,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-18 15:16:12,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:12,047 INFO L225 Difference]: With dead ends: 25 [2018-11-18 15:16:12,047 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 15:16:12,048 INFO L604 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 [2018-11-18 15:16:12,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 15:16:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 15:16:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 15:16:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-18 15:16:12,055 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-18 15:16:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:12,055 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-18 15:16:12,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 15:16:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-18 15:16:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 15:16:12,056 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:12,056 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:12,056 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:12,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:12,057 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-18 15:16:12,057 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:12,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:12,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:12,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:16:12,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 15:16:12,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:12,146 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:12,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 15:16:12,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 15:16:12,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:12,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 15:16:12,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:12,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-18 15:16:12,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 15:16:12,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 15:16:12,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-18 15:16:12,195 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-18 15:16:12,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:12,236 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-18 15:16:12,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 15:16:12,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-18 15:16:12,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:12,237 INFO L225 Difference]: With dead ends: 28 [2018-11-18 15:16:12,238 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 15:16:12,238 INFO L604 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 [2018-11-18 15:16:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 15:16:12,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 15:16:12,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 15:16:12,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 15:16:12,243 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-18 15:16:12,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:12,244 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 15:16:12,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 15:16:12,244 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 15:16:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 15:16:12,245 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:12,245 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:12,245 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:12,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:12,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-18 15:16:12,245 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:12,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:12,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:12,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:12,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 15:16:12,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:12,310 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:12,323 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:16:12,332 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-18 15:16:12,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:12,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 15:16:12,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:12,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-18 15:16:12,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 15:16:12,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 15:16:12,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-18 15:16:12,370 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-18 15:16:12,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:12,423 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-18 15:16:12,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 15:16:12,424 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-18 15:16:12,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:12,424 INFO L225 Difference]: With dead ends: 31 [2018-11-18 15:16:12,424 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 15:16:12,425 INFO L604 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 [2018-11-18 15:16:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 15:16:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-18 15:16:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 15:16:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-18 15:16:12,429 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-18 15:16:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:12,429 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-18 15:16:12,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 15:16:12,429 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-18 15:16:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 15:16:12,430 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:12,430 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:12,430 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:12,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:12,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-18 15:16:12,431 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:12,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:12,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:12,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:12,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 15:16:12,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:12,509 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:12,515 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 15:16:12,524 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 15:16:12,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:12,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 15:16:12,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:12,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-18 15:16:12,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 15:16:12,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 15:16:12,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-18 15:16:12,554 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-18 15:16:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:12,635 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-18 15:16:12,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 15:16:12,636 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-18 15:16:12,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:12,636 INFO L225 Difference]: With dead ends: 34 [2018-11-18 15:16:12,636 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 15:16:12,637 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-18 15:16:12,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 15:16:12,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-18 15:16:12,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 15:16:12,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-18 15:16:12,642 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-18 15:16:12,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:12,642 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-18 15:16:12,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 15:16:12,642 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-18 15:16:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 15:16:12,645 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:12,645 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:12,645 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:12,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:12,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-18 15:16:12,646 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:12,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:12,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:12,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:12,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 15:16:12,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:12,743 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:12,752 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 15:16:12,765 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-18 15:16:12,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:12,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 15:16:12,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:12,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-18 15:16:12,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 15:16:12,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 15:16:12,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-18 15:16:12,797 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-18 15:16:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:12,871 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-18 15:16:12,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 15:16:12,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-18 15:16:12,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:12,873 INFO L225 Difference]: With dead ends: 37 [2018-11-18 15:16:12,873 INFO L226 Difference]: Without dead ends: 33 [2018-11-18 15:16:12,873 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-18 15:16:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-18 15:16:12,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-18 15:16:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 15:16:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-18 15:16:12,876 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-18 15:16:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:12,877 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-18 15:16:12,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 15:16:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-18 15:16:12,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 15:16:12,878 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:12,878 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:12,878 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:12,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:12,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-18 15:16:12,878 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:12,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:12,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:12,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:12,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 15:16:12,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:12,947 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:12,952 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 15:16:12,976 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-18 15:16:12,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:12,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 15:16:13,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:13,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-18 15:16:13,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 15:16:13,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 15:16:13,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-18 15:16:13,005 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-18 15:16:13,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:13,072 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-18 15:16:13,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 15:16:13,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-18 15:16:13,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:13,073 INFO L225 Difference]: With dead ends: 40 [2018-11-18 15:16:13,073 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 15:16:13,074 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-18 15:16:13,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 15:16:13,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-18 15:16:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 15:16:13,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-18 15:16:13,079 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-18 15:16:13,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:13,079 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-18 15:16:13,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 15:16:13,080 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-18 15:16:13,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-18 15:16:13,080 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:13,081 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:13,081 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:13,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:13,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-18 15:16:13,081 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:13,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:13,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:13,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:13,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 15:16:13,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:13,170 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:13,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:16:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:13,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 15:16:13,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:13,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-18 15:16:13,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 15:16:13,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 15:16:13,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:16:13,220 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-18 15:16:13,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:13,307 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-18 15:16:13,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 15:16:13,308 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-18 15:16:13,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:13,309 INFO L225 Difference]: With dead ends: 43 [2018-11-18 15:16:13,309 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 15:16:13,309 INFO L604 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 [2018-11-18 15:16:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 15:16:13,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-18 15:16:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 15:16:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-18 15:16:13,313 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-18 15:16:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:13,313 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-18 15:16:13,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 15:16:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-18 15:16:13,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 15:16:13,313 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:13,314 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:13,314 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:13,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:13,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-18 15:16:13,314 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:13,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:13,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:13,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:16:13,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 15:16:13,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:13,403 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:13,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 15:16:13,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 15:16:13,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:13,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 15:16:13,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:13,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-18 15:16:13,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 15:16:13,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 15:16:13,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-18 15:16:13,458 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-18 15:16:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:13,539 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-18 15:16:13,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 15:16:13,539 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-18 15:16:13,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:13,541 INFO L225 Difference]: With dead ends: 46 [2018-11-18 15:16:13,541 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 15:16:13,542 INFO L604 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 [2018-11-18 15:16:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 15:16:13,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-18 15:16:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 15:16:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-18 15:16:13,545 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-18 15:16:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:13,545 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-18 15:16:13,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 15:16:13,545 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-18 15:16:13,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-18 15:16:13,545 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:13,546 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:13,546 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:13,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:13,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-18 15:16:13,546 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:13,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:13,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:13,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:13,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 15:16:13,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:13,633 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:13,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:16:13,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-18 15:16:13,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:13,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 15:16:13,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:13,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-18 15:16:13,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 15:16:13,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 15:16:13,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-18 15:16:13,692 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-18 15:16:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:13,820 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-18 15:16:13,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 15:16:13,821 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-18 15:16:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:13,821 INFO L225 Difference]: With dead ends: 49 [2018-11-18 15:16:13,821 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 15:16:13,822 INFO L604 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 [2018-11-18 15:16:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 15:16:13,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-18 15:16:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 15:16:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-18 15:16:13,825 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-18 15:16:13,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:13,825 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-18 15:16:13,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 15:16:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-18 15:16:13,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-18 15:16:13,826 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:13,826 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:13,826 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:13,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:13,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-18 15:16:13,827 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:13,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:13,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:13,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:13,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 15:16:13,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:13,923 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:13,929 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 15:16:13,944 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 15:16:13,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:13,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 15:16:13,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:13,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-18 15:16:13,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 15:16:13,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 15:16:13,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-18 15:16:13,992 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-18 15:16:14,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:14,115 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-18 15:16:14,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 15:16:14,115 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-18 15:16:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:14,116 INFO L225 Difference]: With dead ends: 52 [2018-11-18 15:16:14,116 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 15:16:14,117 INFO L604 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 [2018-11-18 15:16:14,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 15:16:14,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-18 15:16:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 15:16:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-18 15:16:14,121 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-18 15:16:14,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:14,121 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-18 15:16:14,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 15:16:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-18 15:16:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-18 15:16:14,122 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:14,123 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:14,123 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:14,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:14,123 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-11-18 15:16:14,123 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:14,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:14,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:14,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:14,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-18 15:16:14,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:14,250 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:14,257 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 15:16:14,274 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-18 15:16:14,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:14,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-18 15:16:14,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:14,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-18 15:16:14,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 15:16:14,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 15:16:14,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-18 15:16:14,321 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-18 15:16:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:14,435 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-18 15:16:14,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 15:16:14,436 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-18 15:16:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:14,436 INFO L225 Difference]: With dead ends: 55 [2018-11-18 15:16:14,436 INFO L226 Difference]: Without dead ends: 51 [2018-11-18 15:16:14,436 INFO L604 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 [2018-11-18 15:16:14,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-18 15:16:14,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-18 15:16:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-18 15:16:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-18 15:16:14,439 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-18 15:16:14,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:14,439 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-18 15:16:14,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 15:16:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-18 15:16:14,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-18 15:16:14,440 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:14,440 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:14,440 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:14,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:14,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-11-18 15:16:14,440 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:14,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:14,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:14,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:14,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-18 15:16:14,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:14,573 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:14,590 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 15:16:14,618 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-18 15:16:14,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:14,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-18 15:16:14,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:14,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-18 15:16:14,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 15:16:14,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 15:16:14,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-18 15:16:14,669 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-18 15:16:14,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:14,806 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-18 15:16:14,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 15:16:14,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-18 15:16:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:14,807 INFO L225 Difference]: With dead ends: 58 [2018-11-18 15:16:14,807 INFO L226 Difference]: Without dead ends: 54 [2018-11-18 15:16:14,807 INFO L604 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 [2018-11-18 15:16:14,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-18 15:16:14,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-18 15:16:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-18 15:16:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-18 15:16:14,812 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-18 15:16:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:14,812 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-18 15:16:14,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 15:16:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-18 15:16:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-18 15:16:14,813 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:14,813 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:14,813 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:14,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:14,814 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-11-18 15:16:14,814 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:14,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:14,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:14,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:14,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-18 15:16:14,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:14,941 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:14,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:16:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:14,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-18 15:16:14,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:14,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-18 15:16:14,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 15:16:14,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 15:16:14,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-18 15:16:14,999 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-18 15:16:15,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:15,149 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-18 15:16:15,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-18 15:16:15,149 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-18 15:16:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:15,149 INFO L225 Difference]: With dead ends: 61 [2018-11-18 15:16:15,149 INFO L226 Difference]: Without dead ends: 57 [2018-11-18 15:16:15,150 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-18 15:16:15,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-18 15:16:15,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-18 15:16:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 15:16:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-18 15:16:15,155 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-18 15:16:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:15,155 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-18 15:16:15,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 15:16:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-18 15:16:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-18 15:16:15,156 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:15,156 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:15,157 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:15,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:15,157 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-11-18 15:16:15,157 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:15,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:15,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:15,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:16:15,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-18 15:16:15,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:15,288 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/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 [2018-11-18 15:16:15,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 15:16:15,308 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 15:16:15,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:15,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-18 15:16:15,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:15,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-18 15:16:15,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-18 15:16:15,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-18 15:16:15,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-18 15:16:15,345 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-18 15:16:15,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:15,495 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-18 15:16:15,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 15:16:15,496 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-18 15:16:15,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:15,496 INFO L225 Difference]: With dead ends: 64 [2018-11-18 15:16:15,497 INFO L226 Difference]: Without dead ends: 60 [2018-11-18 15:16:15,497 INFO L604 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 [2018-11-18 15:16:15,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-18 15:16:15,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-18 15:16:15,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-18 15:16:15,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-18 15:16:15,503 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-18 15:16:15,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:15,503 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-18 15:16:15,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-18 15:16:15,503 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-18 15:16:15,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-18 15:16:15,504 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:15,504 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:15,505 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:15,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:15,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-11-18 15:16:15,505 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:15,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:15,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:15,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:15,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-18 15:16:15,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:15,638 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:15,651 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:16:15,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-18 15:16:15,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:15,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-18 15:16:15,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:15,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-18 15:16:15,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 15:16:15,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 15:16:15,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-11-18 15:16:15,716 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2018-11-18 15:16:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:15,867 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-18 15:16:15,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 15:16:15,867 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2018-11-18 15:16:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:15,868 INFO L225 Difference]: With dead ends: 67 [2018-11-18 15:16:15,868 INFO L226 Difference]: Without dead ends: 63 [2018-11-18 15:16:15,869 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 15:16:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-18 15:16:15,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-18 15:16:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 15:16:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-18 15:16:15,871 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-18 15:16:15,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:15,872 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-18 15:16:15,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 15:16:15,872 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-18 15:16:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-18 15:16:15,873 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:15,873 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:15,873 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:15,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:15,873 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2018-11-18 15:16:15,873 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:15,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:15,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:15,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:15,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-18 15:16:16,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:16,042 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:16,052 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 15:16:16,072 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 15:16:16,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:16,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-18 15:16:16,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:16,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-18 15:16:16,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 15:16:16,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 15:16:16,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-11-18 15:16:16,118 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2018-11-18 15:16:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:16,277 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-18 15:16:16,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 15:16:16,277 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2018-11-18 15:16:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:16,278 INFO L225 Difference]: With dead ends: 70 [2018-11-18 15:16:16,278 INFO L226 Difference]: Without dead ends: 66 [2018-11-18 15:16:16,278 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 15:16:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-18 15:16:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-18 15:16:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-18 15:16:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-18 15:16:16,282 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-18 15:16:16,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:16,283 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-18 15:16:16,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 15:16:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-18 15:16:16,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-18 15:16:16,283 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:16,283 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:16,284 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:16,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:16,284 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2018-11-18 15:16:16,284 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:16,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:16,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:16,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:16,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-18 15:16:16,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:16,447 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:16,454 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 15:16:16,483 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-18 15:16:16,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:16,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-18 15:16:16,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:16,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-18 15:16:16,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-18 15:16:16,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-18 15:16:16,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-11-18 15:16:16,520 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2018-11-18 15:16:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:16,707 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-18 15:16:16,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-18 15:16:16,708 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2018-11-18 15:16:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:16,708 INFO L225 Difference]: With dead ends: 73 [2018-11-18 15:16:16,708 INFO L226 Difference]: Without dead ends: 69 [2018-11-18 15:16:16,709 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-11-18 15:16:16,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-18 15:16:16,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-18 15:16:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-18 15:16:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-18 15:16:16,712 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-18 15:16:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:16,713 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-18 15:16:16,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-18 15:16:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-18 15:16:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-18 15:16:16,714 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:16,714 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:16,714 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:16,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2018-11-18 15:16:16,714 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:16,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:16,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:16,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:16,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-18 15:16:16,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:16,857 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:16,863 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 15:16:16,889 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-18 15:16:16,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:16,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-18 15:16:16,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:16,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-18 15:16:16,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-18 15:16:16,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-18 15:16:16,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-11-18 15:16:16,944 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2018-11-18 15:16:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:17,153 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-18 15:16:17,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 15:16:17,153 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-11-18 15:16:17,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:17,154 INFO L225 Difference]: With dead ends: 76 [2018-11-18 15:16:17,154 INFO L226 Difference]: Without dead ends: 72 [2018-11-18 15:16:17,154 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 15:16:17,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-18 15:16:17,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-18 15:16:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-18 15:16:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-18 15:16:17,158 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-18 15:16:17,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:17,158 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-18 15:16:17,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-18 15:16:17,158 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-18 15:16:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-18 15:16:17,159 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:17,159 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:17,159 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:17,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:17,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2018-11-18 15:16:17,159 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:17,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:17,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:17,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:17,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-18 15:16:17,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:17,329 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:17,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:16:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:17,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-18 15:16:17,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:17,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-18 15:16:17,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-18 15:16:17,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-18 15:16:17,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-18 15:16:17,399 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-11-18 15:16:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:17,620 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-18 15:16:17,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-18 15:16:17,620 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-11-18 15:16:17,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:17,621 INFO L225 Difference]: With dead ends: 79 [2018-11-18 15:16:17,621 INFO L226 Difference]: Without dead ends: 75 [2018-11-18 15:16:17,622 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-11-18 15:16:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-18 15:16:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-18 15:16:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-18 15:16:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-18 15:16:17,625 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-18 15:16:17,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:17,625 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-18 15:16:17,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-18 15:16:17,626 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-18 15:16:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-18 15:16:17,626 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:17,626 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:17,626 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:17,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:17,626 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2018-11-18 15:16:17,626 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:17,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:17,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:17,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:16:17,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-18 15:16:18,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:16:18,305 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:16:18,311 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 15:16:18,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 15:16:18,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:16:18,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:16:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-18 15:16:18,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:16:18,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-11-18 15:16:18,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-18 15:16:18,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-18 15:16:18,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-11-18 15:16:18,410 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2018-11-18 15:16:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:18,802 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-11-18 15:16:18,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-18 15:16:18,802 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2018-11-18 15:16:18,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:18,803 INFO L225 Difference]: With dead ends: 82 [2018-11-18 15:16:18,803 INFO L226 Difference]: Without dead ends: 78 [2018-11-18 15:16:18,804 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-11-18 15:16:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-18 15:16:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-18 15:16:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-18 15:16:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-11-18 15:16:18,807 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-11-18 15:16:18,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:18,807 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-11-18 15:16:18,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-18 15:16:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-11-18 15:16:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-18 15:16:18,808 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:16:18,808 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:16:18,809 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:16:18,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:16:18,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2018-11-18 15:16:18,809 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:16:18,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:16:18,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:18,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:16:18,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:16:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:16:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-18 15:16:19,026 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:16:19,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2018-11-18 15:16:19,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-18 15:16:19,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-18 15:16:19,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-11-18 15:16:19,027 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2018-11-18 15:16:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:16:19,234 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2018-11-18 15:16:19,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-18 15:16:19,235 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2018-11-18 15:16:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:16:19,236 INFO L225 Difference]: With dead ends: 78 [2018-11-18 15:16:19,236 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 15:16:19,236 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-11-18 15:16:19,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 15:16:19,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 15:16:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 15:16:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 15:16:19,237 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2018-11-18 15:16:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:16:19,237 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 15:16:19,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-18 15:16:19,237 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 15:16:19,238 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 15:16:19,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 15:16:19,254 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 15:16:19,254 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 15:16:19,254 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 15:16:19,254 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 15:16:19,254 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 15:16:19,254 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 15:16:19,254 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2018-11-18 15:16:19,254 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2018-11-18 15:16:19,254 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-11-18 15:16:19,254 INFO L425 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-11-18 15:16:19,254 INFO L421 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= 20 main_~input~0) (<= main_~input~0 20)) [2018-11-18 15:16:19,254 INFO L425 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-18 15:16:19,255 INFO L425 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2018-11-18 15:16:19,255 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-11-18 15:16:19,255 INFO L425 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-11-18 15:16:19,255 INFO L425 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-11-18 15:16:19,255 INFO L428 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-11-18 15:16:19,255 INFO L421 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-11-18 15:16:19,255 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 15:16:19,255 INFO L425 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-11-18 15:16:19,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 03:16:19 BoogieIcfgContainer [2018-11-18 15:16:19,257 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 15:16:19,258 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 15:16:19,258 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 15:16:19,258 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 15:16:19,258 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:16:11" (3/4) ... [2018-11-18 15:16:19,263 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 15:16:19,268 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 15:16:19,268 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 15:16:19,268 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-18 15:16:19,271 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 15:16:19,271 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 15:16:19,271 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 15:16:19,298 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b08bff7a-0ae9-4493-8c60-8257146beb4a/bin-2019/uautomizer/witness.graphml [2018-11-18 15:16:19,298 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 15:16:19,299 INFO L168 Benchmark]: Toolchain (without parser) took 8081.04 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 255.9 MB). Free memory was 959.2 MB in the beginning and 1.2 GB in the end (delta: -255.0 MB). Peak memory consumption was 878.3 kB. Max. memory is 11.5 GB. [2018-11-18 15:16:19,300 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:16:19,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.97 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:16:19,300 INFO L168 Benchmark]: Boogie Preprocessor took 15.62 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:16:19,300 INFO L168 Benchmark]: RCFGBuilder took 172.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -176.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 11.5 GB. [2018-11-18 15:16:19,301 INFO L168 Benchmark]: TraceAbstraction took 7697.60 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 121.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -89.5 MB). Peak memory consumption was 32.1 MB. Max. memory is 11.5 GB. [2018-11-18 15:16:19,301 INFO L168 Benchmark]: Witness Printer took 40.61 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 202.9 kB). Peak memory consumption was 202.9 kB. Max. memory is 11.5 GB. [2018-11-18 15:16:19,302 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 150.97 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.62 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 172.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -176.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7697.60 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 121.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -89.5 MB). Peak memory consumption was 32.1 MB. Max. memory is 11.5 GB. * Witness Printer took 40.61 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 202.9 kB). Peak memory consumption was 202.9 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 7.6s OverallTime, 22 OverallIterations, 22 TraceHistogramMax, 2.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 370 SDtfs, 527 SDslu, 4040 SDs, 0 SdLazy, 2636 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2304 GetRequests, 1753 SyntacticMatches, 2 SemanticMatches, 549 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=21, 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, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 3192 NumberOfCodeBlocks, 3192 NumberOfCodeBlocksAsserted, 145 NumberOfCheckSat, 3150 ConstructedInterpolants, 0 QuantifiedInterpolants, 787512 SizeOfPredicates, 229 NumberOfNonLiveVariables, 3560 ConjunctsInSsa, 543 ConjunctsInUnsatCore, 42 InterpolantComputations, 2 PerfectInterpolantSequences, 10164/18984 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...