./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gr2006_true-unreach-call_true-termination.c.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gr2006_true-unreach-call_true-termination.c.i -s /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 76260ed82768318ee6f3ac3cb9cfff5a60080963 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 18:57:15,991 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 18:57:15,992 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 18:57:15,998 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 18:57:15,998 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 18:57:15,999 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 18:57:15,999 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 18:57:16,000 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 18:57:16,001 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 18:57:16,001 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 18:57:16,002 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 18:57:16,002 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 18:57:16,002 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 18:57:16,003 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 18:57:16,003 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 18:57:16,004 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 18:57:16,004 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 18:57:16,005 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 18:57:16,006 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 18:57:16,007 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 18:57:16,007 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 18:57:16,008 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 18:57:16,009 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 18:57:16,009 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 18:57:16,009 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 18:57:16,010 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 18:57:16,010 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 18:57:16,011 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 18:57:16,011 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 18:57:16,012 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 18:57:16,012 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 18:57:16,012 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 18:57:16,012 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 18:57:16,012 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 18:57:16,013 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 18:57:16,013 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 18:57:16,013 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-08 18:57:16,021 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 18:57:16,021 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 18:57:16,021 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 18:57:16,021 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 18:57:16,022 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 18:57:16,022 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 18:57:16,022 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 18:57:16,022 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 18:57:16,022 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 18:57:16,022 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 18:57:16,022 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 18:57:16,022 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 18:57:16,022 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 18:57:16,023 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 18:57:16,023 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 18:57:16,023 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 18:57:16,023 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 18:57:16,023 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 18:57:16,023 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 18:57:16,023 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 18:57:16,023 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 18:57:16,023 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 18:57:16,023 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 18:57:16,023 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 18:57:16,024 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 18:57:16,024 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 18:57:16,024 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 18:57:16,024 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 18:57:16,024 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 18:57:16,024 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 18:57:16,024 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_765b39f9-44ad-4306-80cd-b08c0636a25b/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 -> 76260ed82768318ee6f3ac3cb9cfff5a60080963 [2018-12-08 18:57:16,042 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 18:57:16,050 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 18:57:16,053 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 18:57:16,054 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 18:57:16,054 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 18:57:16,055 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/../../sv-benchmarks/c/loop-lit/gr2006_true-unreach-call_true-termination.c.i [2018-12-08 18:57:16,099 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/data/99d997cfb/b27f4d2dda1142079ba263a42fd27c26/FLAG279fa425b [2018-12-08 18:57:16,495 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 18:57:16,495 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/sv-benchmarks/c/loop-lit/gr2006_true-unreach-call_true-termination.c.i [2018-12-08 18:57:16,499 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/data/99d997cfb/b27f4d2dda1142079ba263a42fd27c26/FLAG279fa425b [2018-12-08 18:57:16,506 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/data/99d997cfb/b27f4d2dda1142079ba263a42fd27c26 [2018-12-08 18:57:16,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 18:57:16,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 18:57:16,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 18:57:16,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 18:57:16,511 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 18:57:16,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 06:57:16" (1/1) ... [2018-12-08 18:57:16,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51f0260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:57:16, skipping insertion in model container [2018-12-08 18:57:16,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 06:57:16" (1/1) ... [2018-12-08 18:57:16,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 18:57:16,530 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 18:57:16,619 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 18:57:16,621 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 18:57:16,629 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 18:57:16,637 INFO L195 MainTranslator]: Completed translation [2018-12-08 18:57:16,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:57:16 WrapperNode [2018-12-08 18:57:16,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 18:57:16,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 18:57:16,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 18:57:16,638 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 18:57:16,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:57:16" (1/1) ... [2018-12-08 18:57:16,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:57:16" (1/1) ... [2018-12-08 18:57:16,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 18:57:16,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 18:57:16,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 18:57:16,655 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 18:57:16,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:57:16" (1/1) ... [2018-12-08 18:57:16,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:57:16" (1/1) ... [2018-12-08 18:57:16,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:57:16" (1/1) ... [2018-12-08 18:57:16,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:57:16" (1/1) ... [2018-12-08 18:57:16,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:57:16" (1/1) ... [2018-12-08 18:57:16,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:57:16" (1/1) ... [2018-12-08 18:57:16,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:57:16" (1/1) ... [2018-12-08 18:57:16,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 18:57:16,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 18:57:16,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 18:57:16,671 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 18:57:16,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:57:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 18:57:16,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 18:57:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 18:57:16,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 18:57:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 18:57:16,732 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 18:57:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-08 18:57:16,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-08 18:57:16,818 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 18:57:16,818 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-08 18:57:16,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 06:57:16 BoogieIcfgContainer [2018-12-08 18:57:16,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 18:57:16,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 18:57:16,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 18:57:16,821 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 18:57:16,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 06:57:16" (1/3) ... [2018-12-08 18:57:16,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e0234e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 06:57:16, skipping insertion in model container [2018-12-08 18:57:16,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:57:16" (2/3) ... [2018-12-08 18:57:16,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e0234e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 06:57:16, skipping insertion in model container [2018-12-08 18:57:16,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 06:57:16" (3/3) ... [2018-12-08 18:57:16,822 INFO L112 eAbstractionObserver]: Analyzing ICFG gr2006_true-unreach-call_true-termination.c.i [2018-12-08 18:57:16,829 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 18:57:16,833 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 18:57:16,843 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 18:57:16,861 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 18:57:16,861 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 18:57:16,861 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 18:57:16,861 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 18:57:16,862 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 18:57:16,862 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 18:57:16,862 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 18:57:16,862 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 18:57:16,862 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 18:57:16,872 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-08 18:57:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-08 18:57:16,875 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:16,876 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:16,877 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:16,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:16,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1001202113, now seen corresponding path program 1 times [2018-12-08 18:57:16,882 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:16,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:16,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:16,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:16,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 18:57:16,945 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 18:57:16,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 18:57:16,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-08 18:57:16,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-08 18:57:16,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 18:57:16,957 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-12-08 18:57:16,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:16,968 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2018-12-08 18:57:16,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-08 18:57:16,969 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-08 18:57:16,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:16,974 INFO L225 Difference]: With dead ends: 32 [2018-12-08 18:57:16,974 INFO L226 Difference]: Without dead ends: 13 [2018-12-08 18:57:16,975 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 18:57:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-08 18:57:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-08 18:57:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-08 18:57:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-12-08 18:57:16,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-12-08 18:57:16,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:16,995 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-12-08 18:57:16,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-08 18:57:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-12-08 18:57:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-08 18:57:16,996 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:16,996 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:16,996 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:16,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:16,996 INFO L82 PathProgramCache]: Analyzing trace with hash 563077882, now seen corresponding path program 1 times [2018-12-08 18:57:16,996 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:16,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:16,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:16,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:16,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 18:57:17,024 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 18:57:17,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 18:57:17,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-08 18:57:17,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-08 18:57:17,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-08 18:57:17,026 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2018-12-08 18:57:17,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:17,046 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-12-08 18:57:17,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 18:57:17,046 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-12-08 18:57:17,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:17,047 INFO L225 Difference]: With dead ends: 22 [2018-12-08 18:57:17,047 INFO L226 Difference]: Without dead ends: 17 [2018-12-08 18:57:17,047 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-08 18:57:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-08 18:57:17,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-08 18:57:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-08 18:57:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-12-08 18:57:17,050 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2018-12-08 18:57:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:17,050 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-12-08 18:57:17,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-08 18:57:17,050 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-12-08 18:57:17,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-08 18:57:17,050 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:17,050 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:17,050 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:17,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:17,051 INFO L82 PathProgramCache]: Analyzing trace with hash 620336184, now seen corresponding path program 1 times [2018-12-08 18:57:17,051 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:17,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:17,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:17,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 18:57:17,060 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 18:57:17,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-08 18:57:17,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 18:57:17,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 18:57:17,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 18:57:17,061 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2018-12-08 18:57:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:17,068 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2018-12-08 18:57:17,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 18:57:17,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-12-08 18:57:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:17,068 INFO L225 Difference]: With dead ends: 32 [2018-12-08 18:57:17,069 INFO L226 Difference]: Without dead ends: 20 [2018-12-08 18:57:17,069 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 18:57:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-08 18:57:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-12-08 18:57:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-08 18:57:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-12-08 18:57:17,071 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2018-12-08 18:57:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:17,071 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-12-08 18:57:17,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 18:57:17,071 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-12-08 18:57:17,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-08 18:57:17,072 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:17,072 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:17,072 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:17,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:17,072 INFO L82 PathProgramCache]: Analyzing trace with hash -657196198, now seen corresponding path program 1 times [2018-12-08 18:57:17,072 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:17,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:17,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:17,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 18:57:17,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:17,090 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:17,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:17,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 18:57:17,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:17,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-12-08 18:57:17,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-08 18:57:17,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-08 18:57:17,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-08 18:57:17,139 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2018-12-08 18:57:17,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:17,150 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2018-12-08 18:57:17,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 18:57:17,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-12-08 18:57:17,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:17,150 INFO L225 Difference]: With dead ends: 35 [2018-12-08 18:57:17,151 INFO L226 Difference]: Without dead ends: 23 [2018-12-08 18:57:17,151 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-08 18:57:17,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-08 18:57:17,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-12-08 18:57:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-08 18:57:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-12-08 18:57:17,153 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2018-12-08 18:57:17,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:17,153 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-12-08 18:57:17,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-08 18:57:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-12-08 18:57:17,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-08 18:57:17,154 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:17,154 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:17,154 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:17,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:17,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1550672957, now seen corresponding path program 2 times [2018-12-08 18:57:17,154 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:17,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:17,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:17,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 18:57:17,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:17,188 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:17,194 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 18:57:17,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 18:57:17,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:17,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 18:57:17,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:17,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-12-08 18:57:17,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 18:57:17,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 18:57:17,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 18:57:17,230 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-12-08 18:57:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:17,243 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2018-12-08 18:57:17,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 18:57:17,243 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-12-08 18:57:17,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:17,243 INFO L225 Difference]: With dead ends: 38 [2018-12-08 18:57:17,243 INFO L226 Difference]: Without dead ends: 26 [2018-12-08 18:57:17,244 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 18:57:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-08 18:57:17,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-12-08 18:57:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-08 18:57:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-12-08 18:57:17,246 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2018-12-08 18:57:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:17,246 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-12-08 18:57:17,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 18:57:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-12-08 18:57:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-08 18:57:17,247 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:17,247 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:17,247 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:17,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:17,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1243468678, now seen corresponding path program 3 times [2018-12-08 18:57:17,247 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:17,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:17,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:17,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 18:57:17,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:17,288 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:17,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 18:57:17,303 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-12-08 18:57:17,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:17,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 18:57:17,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:17,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-12-08 18:57:17,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 18:57:17,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 18:57:17,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-12-08 18:57:17,347 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-12-08 18:57:17,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:17,423 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2018-12-08 18:57:17,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 18:57:17,423 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-12-08 18:57:17,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:17,424 INFO L225 Difference]: With dead ends: 55 [2018-12-08 18:57:17,424 INFO L226 Difference]: Without dead ends: 43 [2018-12-08 18:57:17,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2018-12-08 18:57:17,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-08 18:57:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-12-08 18:57:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-08 18:57:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-08 18:57:17,429 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2018-12-08 18:57:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:17,429 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-08 18:57:17,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 18:57:17,430 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-08 18:57:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-08 18:57:17,430 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:17,430 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:17,431 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:17,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:17,431 INFO L82 PathProgramCache]: Analyzing trace with hash 546656573, now seen corresponding path program 4 times [2018-12-08 18:57:17,431 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:17,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:17,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:17,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-08 18:57:17,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:17,465 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:17,471 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 18:57:17,478 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 18:57:17,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:17,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-08 18:57:17,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:17,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-08 18:57:17,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 18:57:17,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 18:57:17,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-08 18:57:17,498 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 7 states. [2018-12-08 18:57:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:17,513 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2018-12-08 18:57:17,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 18:57:17,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2018-12-08 18:57:17,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:17,514 INFO L225 Difference]: With dead ends: 56 [2018-12-08 18:57:17,514 INFO L226 Difference]: Without dead ends: 38 [2018-12-08 18:57:17,515 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-08 18:57:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-08 18:57:17,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-12-08 18:57:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-08 18:57:17,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2018-12-08 18:57:17,518 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 33 [2018-12-08 18:57:17,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:17,519 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2018-12-08 18:57:17,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 18:57:17,519 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2018-12-08 18:57:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-08 18:57:17,519 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:17,520 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:17,520 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:17,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:17,520 INFO L82 PathProgramCache]: Analyzing trace with hash 508995066, now seen corresponding path program 5 times [2018-12-08 18:57:17,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:17,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:17,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:17,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-08 18:57:17,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:17,561 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:17,570 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 18:57:17,585 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-12-08 18:57:17,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:17,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-08 18:57:17,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:17,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-08 18:57:17,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 18:57:17,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 18:57:17,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-08 18:57:17,606 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2018-12-08 18:57:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:17,622 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2018-12-08 18:57:17,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 18:57:17,623 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2018-12-08 18:57:17,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:17,623 INFO L225 Difference]: With dead ends: 59 [2018-12-08 18:57:17,624 INFO L226 Difference]: Without dead ends: 41 [2018-12-08 18:57:17,624 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-08 18:57:17,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-08 18:57:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-12-08 18:57:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-08 18:57:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-12-08 18:57:17,627 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2018-12-08 18:57:17,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:17,627 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-12-08 18:57:17,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 18:57:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-12-08 18:57:17,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-08 18:57:17,628 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:17,628 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:17,629 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:17,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:17,629 INFO L82 PathProgramCache]: Analyzing trace with hash -478495715, now seen corresponding path program 6 times [2018-12-08 18:57:17,629 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:17,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:17,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:17,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 66 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-08 18:57:17,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:17,673 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:17,679 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 18:57:17,690 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-12-08 18:57:17,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:17,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 89 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-08 18:57:17,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:17,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2018-12-08 18:57:17,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 18:57:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 18:57:17,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-12-08 18:57:17,764 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 14 states. [2018-12-08 18:57:17,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:17,853 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2018-12-08 18:57:17,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-08 18:57:17,854 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2018-12-08 18:57:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:17,854 INFO L225 Difference]: With dead ends: 75 [2018-12-08 18:57:17,854 INFO L226 Difference]: Without dead ends: 57 [2018-12-08 18:57:17,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2018-12-08 18:57:17,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-08 18:57:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2018-12-08 18:57:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-08 18:57:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2018-12-08 18:57:17,858 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 39 [2018-12-08 18:57:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:17,858 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2018-12-08 18:57:17,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 18:57:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2018-12-08 18:57:17,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-08 18:57:17,859 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:17,859 INFO L402 BasicCegarLoop]: trace histogram [12, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:17,859 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:17,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:17,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1304445755, now seen corresponding path program 7 times [2018-12-08 18:57:17,860 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:17,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:17,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:17,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 77 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-08 18:57:17,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:17,909 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:17,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:17,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 77 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-08 18:57:17,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:17,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-12-08 18:57:17,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 18:57:17,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 18:57:17,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-08 18:57:17,951 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 10 states. [2018-12-08 18:57:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:17,968 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2018-12-08 18:57:17,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 18:57:17,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2018-12-08 18:57:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:17,969 INFO L225 Difference]: With dead ends: 71 [2018-12-08 18:57:17,969 INFO L226 Difference]: Without dead ends: 50 [2018-12-08 18:57:17,970 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-08 18:57:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-08 18:57:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-12-08 18:57:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-08 18:57:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2018-12-08 18:57:17,973 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 45 [2018-12-08 18:57:17,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:17,973 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2018-12-08 18:57:17,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 18:57:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2018-12-08 18:57:17,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-08 18:57:17,974 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:17,974 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:17,974 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:17,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:17,974 INFO L82 PathProgramCache]: Analyzing trace with hash -958438280, now seen corresponding path program 8 times [2018-12-08 18:57:17,974 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:17,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:17,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:17,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-08 18:57:18,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:18,054 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:18,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 18:57:18,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 18:57:18,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:18,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-08 18:57:18,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:18,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-12-08 18:57:18,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 18:57:18,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 18:57:18,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-08 18:57:18,092 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 11 states. [2018-12-08 18:57:18,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:18,113 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2018-12-08 18:57:18,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 18:57:18,113 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2018-12-08 18:57:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:18,114 INFO L225 Difference]: With dead ends: 74 [2018-12-08 18:57:18,114 INFO L226 Difference]: Without dead ends: 53 [2018-12-08 18:57:18,114 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-08 18:57:18,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-08 18:57:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2018-12-08 18:57:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-12-08 18:57:18,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2018-12-08 18:57:18,117 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 48 [2018-12-08 18:57:18,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:18,118 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2018-12-08 18:57:18,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 18:57:18,118 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2018-12-08 18:57:18,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-08 18:57:18,118 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:18,118 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:18,118 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:18,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:18,119 INFO L82 PathProgramCache]: Analyzing trace with hash -730046949, now seen corresponding path program 9 times [2018-12-08 18:57:18,119 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:18,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:18,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:18,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:18,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 125 proven. 126 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-08 18:57:18,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:18,207 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:18,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 18:57:18,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-12-08 18:57:18,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:18,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 203 proven. 57 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-12-08 18:57:18,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:18,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-12-08 18:57:18,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-08 18:57:18,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-08 18:57:18,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-12-08 18:57:18,335 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 22 states. [2018-12-08 18:57:18,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:18,509 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2018-12-08 18:57:18,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-08 18:57:18,509 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2018-12-08 18:57:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:18,510 INFO L225 Difference]: With dead ends: 157 [2018-12-08 18:57:18,510 INFO L226 Difference]: Without dead ends: 136 [2018-12-08 18:57:18,510 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2018-12-08 18:57:18,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-12-08 18:57:18,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 70. [2018-12-08 18:57:18,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-12-08 18:57:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2018-12-08 18:57:18,515 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 51 [2018-12-08 18:57:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:18,515 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2018-12-08 18:57:18,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-08 18:57:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2018-12-08 18:57:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-08 18:57:18,516 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:18,516 INFO L402 BasicCegarLoop]: trace histogram [20, 19, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:18,516 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:18,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:18,516 INFO L82 PathProgramCache]: Analyzing trace with hash -346376131, now seen corresponding path program 10 times [2018-12-08 18:57:18,516 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:18,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:18,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:18,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:18,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 298 proven. 155 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:18,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:18,581 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:18,587 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 18:57:18,599 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 18:57:18,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:18,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 298 proven. 155 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:18,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:18,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-12-08 18:57:18,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 18:57:18,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 18:57:18,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-08 18:57:18,622 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 13 states. [2018-12-08 18:57:18,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:18,647 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2018-12-08 18:57:18,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 18:57:18,648 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2018-12-08 18:57:18,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:18,648 INFO L225 Difference]: With dead ends: 110 [2018-12-08 18:57:18,648 INFO L226 Difference]: Without dead ends: 74 [2018-12-08 18:57:18,648 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-08 18:57:18,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-12-08 18:57:18,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-12-08 18:57:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-12-08 18:57:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2018-12-08 18:57:18,652 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 69 [2018-12-08 18:57:18,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:18,653 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2018-12-08 18:57:18,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 18:57:18,653 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2018-12-08 18:57:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-08 18:57:18,653 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:18,653 INFO L402 BasicCegarLoop]: trace histogram [21, 20, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:18,653 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:18,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:18,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1894331002, now seen corresponding path program 11 times [2018-12-08 18:57:18,653 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:18,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:18,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:18,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:18,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 326 proven. 187 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:18,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:18,727 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:18,732 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 18:57:18,751 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-12-08 18:57:18,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:18,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 326 proven. 187 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:18,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:18,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-12-08 18:57:18,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 18:57:18,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 18:57:18,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-08 18:57:18,776 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 14 states. [2018-12-08 18:57:18,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:18,797 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2018-12-08 18:57:18,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 18:57:18,798 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 72 [2018-12-08 18:57:18,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:18,798 INFO L225 Difference]: With dead ends: 113 [2018-12-08 18:57:18,798 INFO L226 Difference]: Without dead ends: 77 [2018-12-08 18:57:18,799 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-08 18:57:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-12-08 18:57:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2018-12-08 18:57:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-12-08 18:57:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2018-12-08 18:57:18,804 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 72 [2018-12-08 18:57:18,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:18,804 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2018-12-08 18:57:18,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 18:57:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2018-12-08 18:57:18,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-12-08 18:57:18,805 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:18,805 INFO L402 BasicCegarLoop]: trace histogram [22, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:18,805 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:18,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:18,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1876151523, now seen corresponding path program 12 times [2018-12-08 18:57:18,805 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:18,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:18,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:18,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:18,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 354 proven. 222 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:18,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:18,916 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:18,925 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 18:57:18,945 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-12-08 18:57:18,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:18,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 354 proven. 222 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:18,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:18,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-12-08 18:57:18,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 18:57:18,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 18:57:18,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-12-08 18:57:18,974 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 15 states. [2018-12-08 18:57:19,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:19,006 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2018-12-08 18:57:19,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-08 18:57:19,007 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2018-12-08 18:57:19,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:19,007 INFO L225 Difference]: With dead ends: 116 [2018-12-08 18:57:19,007 INFO L226 Difference]: Without dead ends: 80 [2018-12-08 18:57:19,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-12-08 18:57:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-08 18:57:19,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2018-12-08 18:57:19,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-08 18:57:19,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2018-12-08 18:57:19,011 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 75 [2018-12-08 18:57:19,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:19,011 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2018-12-08 18:57:19,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 18:57:19,011 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2018-12-08 18:57:19,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-12-08 18:57:19,012 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:19,012 INFO L402 BasicCegarLoop]: trace histogram [23, 22, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:19,012 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:19,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:19,012 INFO L82 PathProgramCache]: Analyzing trace with hash -2041361510, now seen corresponding path program 13 times [2018-12-08 18:57:19,012 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:19,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:19,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:19,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:19,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 382 proven. 260 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:19,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:19,099 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:19,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:19,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 382 proven. 260 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:19,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:19,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-12-08 18:57:19,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-08 18:57:19,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-08 18:57:19,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-08 18:57:19,147 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 16 states. [2018-12-08 18:57:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:19,178 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2018-12-08 18:57:19,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-08 18:57:19,178 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2018-12-08 18:57:19,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:19,178 INFO L225 Difference]: With dead ends: 119 [2018-12-08 18:57:19,178 INFO L226 Difference]: Without dead ends: 83 [2018-12-08 18:57:19,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-08 18:57:19,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-08 18:57:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2018-12-08 18:57:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-12-08 18:57:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2018-12-08 18:57:19,182 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 78 [2018-12-08 18:57:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:19,182 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2018-12-08 18:57:19,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-08 18:57:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2018-12-08 18:57:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-08 18:57:19,183 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:19,183 INFO L402 BasicCegarLoop]: trace histogram [24, 23, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:19,183 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:19,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:19,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1779563011, now seen corresponding path program 14 times [2018-12-08 18:57:19,183 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:19,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:19,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:19,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:19,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 410 proven. 301 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:19,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:19,278 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:19,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 18:57:19,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 18:57:19,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:19,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 410 proven. 301 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:19,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:19,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-12-08 18:57:19,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-08 18:57:19,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-08 18:57:19,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-12-08 18:57:19,324 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 17 states. [2018-12-08 18:57:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:19,353 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2018-12-08 18:57:19,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-08 18:57:19,353 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2018-12-08 18:57:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:19,353 INFO L225 Difference]: With dead ends: 122 [2018-12-08 18:57:19,353 INFO L226 Difference]: Without dead ends: 86 [2018-12-08 18:57:19,354 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-12-08 18:57:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-12-08 18:57:19,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2018-12-08 18:57:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-12-08 18:57:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2018-12-08 18:57:19,358 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 81 [2018-12-08 18:57:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:19,358 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2018-12-08 18:57:19,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-08 18:57:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2018-12-08 18:57:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-12-08 18:57:19,358 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:19,359 INFO L402 BasicCegarLoop]: trace histogram [25, 24, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:19,359 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:19,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:19,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2093878458, now seen corresponding path program 15 times [2018-12-08 18:57:19,359 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:19,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:19,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:19,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:19,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 438 proven. 345 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:19,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:19,473 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:19,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 18:57:19,500 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-12-08 18:57:19,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:19,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 24 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 18:57:19,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:19,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 27] total 27 [2018-12-08 18:57:19,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-08 18:57:19,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-08 18:57:19,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-12-08 18:57:19,625 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 27 states. [2018-12-08 18:57:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:19,672 INFO L93 Difference]: Finished difference Result 152 states and 182 transitions. [2018-12-08 18:57:19,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-08 18:57:19,673 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 84 [2018-12-08 18:57:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:19,673 INFO L225 Difference]: With dead ends: 152 [2018-12-08 18:57:19,673 INFO L226 Difference]: Without dead ends: 116 [2018-12-08 18:57:19,674 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-12-08 18:57:19,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-12-08 18:57:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2018-12-08 18:57:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-12-08 18:57:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2018-12-08 18:57:19,678 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 84 [2018-12-08 18:57:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:19,678 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2018-12-08 18:57:19,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-08 18:57:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2018-12-08 18:57:19,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-12-08 18:57:19,679 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:19,679 INFO L402 BasicCegarLoop]: trace histogram [35, 34, 25, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:19,680 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:19,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:19,680 INFO L82 PathProgramCache]: Analyzing trace with hash -711742886, now seen corresponding path program 16 times [2018-12-08 18:57:19,680 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:19,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:19,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:19,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:19,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 718 proven. 950 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:19,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:19,884 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:19,890 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 18:57:19,906 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 18:57:19,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:19,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 718 proven. 950 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:19,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:19,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-12-08 18:57:19,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-08 18:57:19,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-08 18:57:19,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-12-08 18:57:19,933 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 28 states. [2018-12-08 18:57:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:19,984 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2018-12-08 18:57:19,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-08 18:57:19,985 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 114 [2018-12-08 18:57:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:19,985 INFO L225 Difference]: With dead ends: 155 [2018-12-08 18:57:19,986 INFO L226 Difference]: Without dead ends: 119 [2018-12-08 18:57:19,986 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-12-08 18:57:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-12-08 18:57:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2018-12-08 18:57:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-12-08 18:57:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2018-12-08 18:57:19,990 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 114 [2018-12-08 18:57:19,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:19,990 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2018-12-08 18:57:19,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-08 18:57:19,990 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2018-12-08 18:57:19,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-12-08 18:57:19,991 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:19,991 INFO L402 BasicCegarLoop]: trace histogram [36, 35, 26, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:19,991 INFO L423 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:19,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:19,992 INFO L82 PathProgramCache]: Analyzing trace with hash 700460861, now seen corresponding path program 17 times [2018-12-08 18:57:19,992 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:19,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:19,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:19,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:19,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 746 proven. 1027 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:20,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:20,201 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:20,207 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 18:57:20,237 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-12-08 18:57:20,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:20,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 746 proven. 1027 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:20,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:20,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-12-08 18:57:20,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-08 18:57:20,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-08 18:57:20,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-12-08 18:57:20,267 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 29 states. [2018-12-08 18:57:20,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:20,317 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2018-12-08 18:57:20,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-08 18:57:20,317 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 117 [2018-12-08 18:57:20,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:20,318 INFO L225 Difference]: With dead ends: 158 [2018-12-08 18:57:20,318 INFO L226 Difference]: Without dead ends: 122 [2018-12-08 18:57:20,318 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-12-08 18:57:20,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-12-08 18:57:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-12-08 18:57:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-12-08 18:57:20,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2018-12-08 18:57:20,322 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 117 [2018-12-08 18:57:20,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:20,322 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2018-12-08 18:57:20,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-08 18:57:20,322 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2018-12-08 18:57:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-12-08 18:57:20,322 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:20,322 INFO L402 BasicCegarLoop]: trace histogram [37, 36, 27, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:20,323 INFO L423 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:20,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:20,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1837343878, now seen corresponding path program 18 times [2018-12-08 18:57:20,323 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:20,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:20,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:20,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:20,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 774 proven. 1107 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:20,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:20,572 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:20,577 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 18:57:20,610 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-12-08 18:57:20,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:20,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 774 proven. 1107 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:20,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:20,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-12-08 18:57:20,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-12-08 18:57:20,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-12-08 18:57:20,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-08 18:57:20,644 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 30 states. [2018-12-08 18:57:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:20,700 INFO L93 Difference]: Finished difference Result 161 states and 182 transitions. [2018-12-08 18:57:20,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-08 18:57:20,700 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2018-12-08 18:57:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:20,701 INFO L225 Difference]: With dead ends: 161 [2018-12-08 18:57:20,701 INFO L226 Difference]: Without dead ends: 125 [2018-12-08 18:57:20,701 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-08 18:57:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-12-08 18:57:20,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2018-12-08 18:57:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-12-08 18:57:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2018-12-08 18:57:20,706 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 120 [2018-12-08 18:57:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:20,706 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2018-12-08 18:57:20,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-12-08 18:57:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2018-12-08 18:57:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-12-08 18:57:20,706 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:20,706 INFO L402 BasicCegarLoop]: trace histogram [38, 37, 28, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:20,707 INFO L423 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:20,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:20,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1269011939, now seen corresponding path program 19 times [2018-12-08 18:57:20,707 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:20,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:20,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:20,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:20,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 802 proven. 1190 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:20,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:20,960 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:20,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:20,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 802 proven. 1190 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:21,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:21,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-12-08 18:57:21,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-08 18:57:21,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-08 18:57:21,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-12-08 18:57:21,012 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 31 states. [2018-12-08 18:57:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:21,067 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2018-12-08 18:57:21,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-08 18:57:21,068 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 123 [2018-12-08 18:57:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:21,068 INFO L225 Difference]: With dead ends: 164 [2018-12-08 18:57:21,069 INFO L226 Difference]: Without dead ends: 128 [2018-12-08 18:57:21,069 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-12-08 18:57:21,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-12-08 18:57:21,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2018-12-08 18:57:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-12-08 18:57:21,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2018-12-08 18:57:21,072 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 123 [2018-12-08 18:57:21,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:21,073 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2018-12-08 18:57:21,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-08 18:57:21,073 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2018-12-08 18:57:21,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-12-08 18:57:21,073 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:21,073 INFO L402 BasicCegarLoop]: trace histogram [39, 38, 29, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:21,073 INFO L423 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:21,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:21,073 INFO L82 PathProgramCache]: Analyzing trace with hash -853298022, now seen corresponding path program 20 times [2018-12-08 18:57:21,073 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:21,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:21,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:21,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:21,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 830 proven. 1276 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:21,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:21,324 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/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 [2018-12-08 18:57:21,330 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 18:57:21,348 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 18:57:21,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:21,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 830 proven. 1276 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:21,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:21,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-12-08 18:57:21,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-08 18:57:21,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-08 18:57:21,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-08 18:57:21,380 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand 32 states. [2018-12-08 18:57:21,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:21,428 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2018-12-08 18:57:21,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-08 18:57:21,428 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2018-12-08 18:57:21,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:21,429 INFO L225 Difference]: With dead ends: 167 [2018-12-08 18:57:21,429 INFO L226 Difference]: Without dead ends: 131 [2018-12-08 18:57:21,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-08 18:57:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-12-08 18:57:21,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2018-12-08 18:57:21,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-12-08 18:57:21,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 140 transitions. [2018-12-08 18:57:21,433 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 140 transitions. Word has length 126 [2018-12-08 18:57:21,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:21,433 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 140 transitions. [2018-12-08 18:57:21,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-08 18:57:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 140 transitions. [2018-12-08 18:57:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-12-08 18:57:21,434 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:21,434 INFO L402 BasicCegarLoop]: trace histogram [40, 39, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:21,434 INFO L423 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:21,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:21,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1289288957, now seen corresponding path program 21 times [2018-12-08 18:57:21,434 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:21,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:21,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:21,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:21,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 858 proven. 1365 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 18:57:21,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:21,704 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:21,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 18:57:21,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-12-08 18:57:21,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:21,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 1481 proven. 262 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2018-12-08 18:57:21,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:21,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 13] total 44 [2018-12-08 18:57:21,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-08 18:57:21,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-08 18:57:21,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2018-12-08 18:57:21,928 INFO L87 Difference]: Start difference. First operand 130 states and 140 transitions. Second operand 44 states. [2018-12-08 18:57:22,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:22,334 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2018-12-08 18:57:22,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-12-08 18:57:22,335 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 129 [2018-12-08 18:57:22,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:22,335 INFO L225 Difference]: With dead ends: 201 [2018-12-08 18:57:22,335 INFO L226 Difference]: Without dead ends: 165 [2018-12-08 18:57:22,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2049, Invalid=5091, Unknown=0, NotChecked=0, Total=7140 [2018-12-08 18:57:22,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-12-08 18:57:22,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 136. [2018-12-08 18:57:22,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-12-08 18:57:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2018-12-08 18:57:22,341 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 129 [2018-12-08 18:57:22,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:22,342 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2018-12-08 18:57:22,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-08 18:57:22,342 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2018-12-08 18:57:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-12-08 18:57:22,342 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:22,342 INFO L402 BasicCegarLoop]: trace histogram [42, 41, 31, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:22,343 INFO L423 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:22,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:22,343 INFO L82 PathProgramCache]: Analyzing trace with hash 403855515, now seen corresponding path program 22 times [2018-12-08 18:57:22,343 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:22,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:22,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:22,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:22,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 981 proven. 1457 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-08 18:57:22,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:22,649 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:22,655 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 18:57:22,674 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 18:57:22,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:22,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 981 proven. 1457 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-08 18:57:22,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:22,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-12-08 18:57:22,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-12-08 18:57:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-12-08 18:57:22,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-08 18:57:22,703 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 34 states. [2018-12-08 18:57:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:22,761 INFO L93 Difference]: Finished difference Result 179 states and 202 transitions. [2018-12-08 18:57:22,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-12-08 18:57:22,762 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 135 [2018-12-08 18:57:22,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:22,762 INFO L225 Difference]: With dead ends: 179 [2018-12-08 18:57:22,763 INFO L226 Difference]: Without dead ends: 140 [2018-12-08 18:57:22,763 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-08 18:57:22,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-12-08 18:57:22,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2018-12-08 18:57:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-12-08 18:57:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2018-12-08 18:57:22,768 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 135 [2018-12-08 18:57:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:22,768 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2018-12-08 18:57:22,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-12-08 18:57:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2018-12-08 18:57:22,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-12-08 18:57:22,769 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:22,769 INFO L402 BasicCegarLoop]: trace histogram [43, 42, 32, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:22,769 INFO L423 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:22,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:22,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1808478312, now seen corresponding path program 23 times [2018-12-08 18:57:22,769 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:22,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:22,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:22,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:22,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 1012 proven. 1552 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-08 18:57:23,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:23,075 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:23,081 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 18:57:23,121 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-12-08 18:57:23,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:23,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 1012 proven. 1552 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-08 18:57:23,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:23,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-12-08 18:57:23,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-08 18:57:23,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-08 18:57:23,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-12-08 18:57:23,151 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand 35 states. [2018-12-08 18:57:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:23,203 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2018-12-08 18:57:23,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-08 18:57:23,204 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 138 [2018-12-08 18:57:23,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:23,204 INFO L225 Difference]: With dead ends: 182 [2018-12-08 18:57:23,204 INFO L226 Difference]: Without dead ends: 143 [2018-12-08 18:57:23,204 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-12-08 18:57:23,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-12-08 18:57:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2018-12-08 18:57:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-12-08 18:57:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 153 transitions. [2018-12-08 18:57:23,209 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 153 transitions. Word has length 138 [2018-12-08 18:57:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:23,209 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 153 transitions. [2018-12-08 18:57:23,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-08 18:57:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 153 transitions. [2018-12-08 18:57:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-12-08 18:57:23,209 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:23,209 INFO L402 BasicCegarLoop]: trace histogram [44, 43, 33, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:23,210 INFO L423 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:23,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:23,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1122605947, now seen corresponding path program 24 times [2018-12-08 18:57:23,210 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:23,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:23,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:23,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:23,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1043 proven. 1650 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-08 18:57:23,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:23,515 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:23,521 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 18:57:23,561 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-12-08 18:57:23,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:23,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 2486 proven. 321 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-12-08 18:57:24,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:24,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2018-12-08 18:57:24,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-12-08 18:57:24,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-12-08 18:57:24,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-12-08 18:57:24,154 INFO L87 Difference]: Start difference. First operand 142 states and 153 transitions. Second operand 70 states. [2018-12-08 18:57:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:25,008 INFO L93 Difference]: Finished difference Result 967 states and 1266 transitions. [2018-12-08 18:57:25,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-12-08 18:57:25,008 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 141 [2018-12-08 18:57:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:25,011 INFO L225 Difference]: With dead ends: 967 [2018-12-08 18:57:25,011 INFO L226 Difference]: Without dead ends: 928 [2018-12-08 18:57:25,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3837, Invalid=14795, Unknown=0, NotChecked=0, Total=18632 [2018-12-08 18:57:25,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2018-12-08 18:57:25,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 214. [2018-12-08 18:57:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-12-08 18:57:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 248 transitions. [2018-12-08 18:57:25,041 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 248 transitions. Word has length 141 [2018-12-08 18:57:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:25,041 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 248 transitions. [2018-12-08 18:57:25,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-12-08 18:57:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 248 transitions. [2018-12-08 18:57:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-12-08 18:57:25,042 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:25,042 INFO L402 BasicCegarLoop]: trace histogram [68, 67, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:25,042 INFO L423 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:25,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:25,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1937984451, now seen corresponding path program 25 times [2018-12-08 18:57:25,042 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:25,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:25,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:25,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:25,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 3466 proven. 1751 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2018-12-08 18:57:25,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:25,390 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:25,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:25,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 3466 proven. 1751 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2018-12-08 18:57:25,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:25,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-12-08 18:57:25,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-12-08 18:57:25,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-12-08 18:57:25,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-12-08 18:57:25,485 INFO L87 Difference]: Start difference. First operand 214 states and 248 transitions. Second operand 37 states. [2018-12-08 18:57:25,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:25,585 INFO L93 Difference]: Finished difference Result 326 states and 395 transitions. [2018-12-08 18:57:25,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-08 18:57:25,585 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 213 [2018-12-08 18:57:25,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:25,586 INFO L225 Difference]: With dead ends: 326 [2018-12-08 18:57:25,586 INFO L226 Difference]: Without dead ends: 218 [2018-12-08 18:57:25,586 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-12-08 18:57:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-12-08 18:57:25,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2018-12-08 18:57:25,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-12-08 18:57:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 251 transitions. [2018-12-08 18:57:25,617 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 251 transitions. Word has length 213 [2018-12-08 18:57:25,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:25,617 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 251 transitions. [2018-12-08 18:57:25,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-12-08 18:57:25,617 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 251 transitions. [2018-12-08 18:57:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-12-08 18:57:25,618 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:25,618 INFO L402 BasicCegarLoop]: trace histogram [69, 68, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:25,618 INFO L423 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:25,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:25,618 INFO L82 PathProgramCache]: Analyzing trace with hash 13649018, now seen corresponding path program 26 times [2018-12-08 18:57:25,618 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:25,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:25,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:25,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:25,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 3566 proven. 1855 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2018-12-08 18:57:25,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:25,988 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:25,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 18:57:26,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 18:57:26,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:26,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 3566 proven. 1855 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2018-12-08 18:57:26,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:26,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-12-08 18:57:26,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-12-08 18:57:26,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-12-08 18:57:26,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-12-08 18:57:26,061 INFO L87 Difference]: Start difference. First operand 217 states and 251 transitions. Second operand 38 states. [2018-12-08 18:57:26,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:26,134 INFO L93 Difference]: Finished difference Result 329 states and 398 transitions. [2018-12-08 18:57:26,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-08 18:57:26,135 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 216 [2018-12-08 18:57:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:26,135 INFO L225 Difference]: With dead ends: 329 [2018-12-08 18:57:26,135 INFO L226 Difference]: Without dead ends: 221 [2018-12-08 18:57:26,136 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-12-08 18:57:26,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-12-08 18:57:26,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2018-12-08 18:57:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-12-08 18:57:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 254 transitions. [2018-12-08 18:57:26,155 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 254 transitions. Word has length 216 [2018-12-08 18:57:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:26,155 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 254 transitions. [2018-12-08 18:57:26,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-12-08 18:57:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 254 transitions. [2018-12-08 18:57:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-12-08 18:57:26,155 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:26,156 INFO L402 BasicCegarLoop]: trace histogram [70, 69, 36, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:26,156 INFO L423 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:26,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:26,156 INFO L82 PathProgramCache]: Analyzing trace with hash 154038045, now seen corresponding path program 27 times [2018-12-08 18:57:26,156 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:26,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:26,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:26,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:26,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7245 backedges. 3666 proven. 1962 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2018-12-08 18:57:26,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:26,514 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:26,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 18:57:26,605 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-12-08 18:57:26,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:26,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7245 backedges. 3666 proven. 1962 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2018-12-08 18:57:26,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:26,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-12-08 18:57:26,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-12-08 18:57:26,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-12-08 18:57:26,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-12-08 18:57:26,655 INFO L87 Difference]: Start difference. First operand 220 states and 254 transitions. Second operand 39 states. [2018-12-08 18:57:26,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:26,729 INFO L93 Difference]: Finished difference Result 332 states and 401 transitions. [2018-12-08 18:57:26,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-08 18:57:26,729 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 219 [2018-12-08 18:57:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:26,730 INFO L225 Difference]: With dead ends: 332 [2018-12-08 18:57:26,730 INFO L226 Difference]: Without dead ends: 224 [2018-12-08 18:57:26,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-12-08 18:57:26,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-12-08 18:57:26,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2018-12-08 18:57:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-12-08 18:57:26,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 257 transitions. [2018-12-08 18:57:26,764 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 257 transitions. Word has length 219 [2018-12-08 18:57:26,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:26,764 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 257 transitions. [2018-12-08 18:57:26,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-12-08 18:57:26,764 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 257 transitions. [2018-12-08 18:57:26,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-12-08 18:57:26,765 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:26,765 INFO L402 BasicCegarLoop]: trace histogram [71, 70, 37, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:26,765 INFO L423 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:26,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:26,765 INFO L82 PathProgramCache]: Analyzing trace with hash -814604902, now seen corresponding path program 28 times [2018-12-08 18:57:26,765 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:26,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:26,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:26,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:26,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7455 backedges. 3766 proven. 2072 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2018-12-08 18:57:27,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:27,162 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:27,167 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 18:57:27,200 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 18:57:27,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:27,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7455 backedges. 3766 proven. 2072 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2018-12-08 18:57:27,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:27,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-12-08 18:57:27,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-08 18:57:27,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-08 18:57:27,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-08 18:57:27,251 INFO L87 Difference]: Start difference. First operand 223 states and 257 transitions. Second operand 40 states. [2018-12-08 18:57:27,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:27,342 INFO L93 Difference]: Finished difference Result 335 states and 404 transitions. [2018-12-08 18:57:27,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-08 18:57:27,342 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 222 [2018-12-08 18:57:27,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:27,343 INFO L225 Difference]: With dead ends: 335 [2018-12-08 18:57:27,343 INFO L226 Difference]: Without dead ends: 227 [2018-12-08 18:57:27,344 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-08 18:57:27,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-12-08 18:57:27,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2018-12-08 18:57:27,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-12-08 18:57:27,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 260 transitions. [2018-12-08 18:57:27,363 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 260 transitions. Word has length 222 [2018-12-08 18:57:27,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:27,363 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 260 transitions. [2018-12-08 18:57:27,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-08 18:57:27,364 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 260 transitions. [2018-12-08 18:57:27,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-12-08 18:57:27,364 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:27,364 INFO L402 BasicCegarLoop]: trace histogram [72, 71, 38, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:27,365 INFO L423 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:27,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:27,365 INFO L82 PathProgramCache]: Analyzing trace with hash 228622845, now seen corresponding path program 29 times [2018-12-08 18:57:27,365 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:27,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:27,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:27,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:27,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7668 backedges. 3866 proven. 2185 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2018-12-08 18:57:27,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:27,751 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:27,757 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 18:57:27,863 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-12-08 18:57:27,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:27,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7668 backedges. 3866 proven. 2185 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2018-12-08 18:57:27,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:27,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-12-08 18:57:27,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-12-08 18:57:27,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-12-08 18:57:27,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-12-08 18:57:27,913 INFO L87 Difference]: Start difference. First operand 226 states and 260 transitions. Second operand 41 states. [2018-12-08 18:57:27,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:27,988 INFO L93 Difference]: Finished difference Result 338 states and 407 transitions. [2018-12-08 18:57:27,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-08 18:57:27,988 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 225 [2018-12-08 18:57:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:27,989 INFO L225 Difference]: With dead ends: 338 [2018-12-08 18:57:27,989 INFO L226 Difference]: Without dead ends: 230 [2018-12-08 18:57:27,990 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-12-08 18:57:27,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-12-08 18:57:28,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2018-12-08 18:57:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-12-08 18:57:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 263 transitions. [2018-12-08 18:57:28,018 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 263 transitions. Word has length 225 [2018-12-08 18:57:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:28,018 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 263 transitions. [2018-12-08 18:57:28,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-12-08 18:57:28,018 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 263 transitions. [2018-12-08 18:57:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-12-08 18:57:28,019 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:28,019 INFO L402 BasicCegarLoop]: trace histogram [73, 72, 39, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:28,019 INFO L423 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:28,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:28,019 INFO L82 PathProgramCache]: Analyzing trace with hash 643079866, now seen corresponding path program 30 times [2018-12-08 18:57:28,019 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:28,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:28,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:28,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:28,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7884 backedges. 3966 proven. 2301 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2018-12-08 18:57:28,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:28,453 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:28,461 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 18:57:28,567 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-12-08 18:57:28,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:28,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7884 backedges. 4450 proven. 3334 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-08 18:57:29,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:29,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2018-12-08 18:57:29,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-12-08 18:57:29,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-12-08 18:57:29,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-12-08 18:57:29,384 INFO L87 Difference]: Start difference. First operand 229 states and 263 transitions. Second operand 82 states. [2018-12-08 18:57:30,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:30,650 INFO L93 Difference]: Finished difference Result 959 states and 1238 transitions. [2018-12-08 18:57:30,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-12-08 18:57:30,651 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 228 [2018-12-08 18:57:30,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:30,652 INFO L225 Difference]: With dead ends: 959 [2018-12-08 18:57:30,652 INFO L226 Difference]: Without dead ends: 851 [2018-12-08 18:57:30,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6046 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5235, Invalid=20525, Unknown=0, NotChecked=0, Total=25760 [2018-12-08 18:57:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2018-12-08 18:57:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 250. [2018-12-08 18:57:30,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-12-08 18:57:30,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 290 transitions. [2018-12-08 18:57:30,692 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 290 transitions. Word has length 228 [2018-12-08 18:57:30,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:30,692 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 290 transitions. [2018-12-08 18:57:30,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-12-08 18:57:30,692 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 290 transitions. [2018-12-08 18:57:30,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-12-08 18:57:30,693 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:30,693 INFO L402 BasicCegarLoop]: trace histogram [80, 79, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:30,693 INFO L423 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:30,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash -974894275, now seen corresponding path program 31 times [2018-12-08 18:57:30,694 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:30,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:30,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:30,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:30,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 4798 proven. 2420 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:31,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:31,198 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:31,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:31,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 4798 proven. 2420 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:31,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:31,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-12-08 18:57:31,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-12-08 18:57:31,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-12-08 18:57:31,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-12-08 18:57:31,282 INFO L87 Difference]: Start difference. First operand 250 states and 290 transitions. Second operand 43 states. [2018-12-08 18:57:31,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:31,384 INFO L93 Difference]: Finished difference Result 380 states and 461 transitions. [2018-12-08 18:57:31,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-08 18:57:31,384 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 249 [2018-12-08 18:57:31,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:31,385 INFO L225 Difference]: With dead ends: 380 [2018-12-08 18:57:31,385 INFO L226 Difference]: Without dead ends: 254 [2018-12-08 18:57:31,385 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-12-08 18:57:31,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-12-08 18:57:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2018-12-08 18:57:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-12-08 18:57:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 293 transitions. [2018-12-08 18:57:31,421 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 293 transitions. Word has length 249 [2018-12-08 18:57:31,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:31,421 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 293 transitions. [2018-12-08 18:57:31,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-12-08 18:57:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 293 transitions. [2018-12-08 18:57:31,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-12-08 18:57:31,422 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:31,422 INFO L402 BasicCegarLoop]: trace histogram [81, 80, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:31,422 INFO L423 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:31,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:31,422 INFO L82 PathProgramCache]: Analyzing trace with hash -491962118, now seen corresponding path program 32 times [2018-12-08 18:57:31,423 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:31,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:31,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:31,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:31,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 4916 proven. 2542 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:31,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:31,871 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:31,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 18:57:31,912 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 18:57:31,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:31,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 4916 proven. 2542 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:31,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:31,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-12-08 18:57:31,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-08 18:57:31,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-08 18:57:31,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-12-08 18:57:31,968 INFO L87 Difference]: Start difference. First operand 253 states and 293 transitions. Second operand 44 states. [2018-12-08 18:57:32,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:32,058 INFO L93 Difference]: Finished difference Result 383 states and 464 transitions. [2018-12-08 18:57:32,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-08 18:57:32,058 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 252 [2018-12-08 18:57:32,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:32,059 INFO L225 Difference]: With dead ends: 383 [2018-12-08 18:57:32,059 INFO L226 Difference]: Without dead ends: 257 [2018-12-08 18:57:32,059 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-12-08 18:57:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-12-08 18:57:32,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2018-12-08 18:57:32,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-12-08 18:57:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 296 transitions. [2018-12-08 18:57:32,102 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 296 transitions. Word has length 252 [2018-12-08 18:57:32,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:32,103 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 296 transitions. [2018-12-08 18:57:32,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-08 18:57:32,103 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 296 transitions. [2018-12-08 18:57:32,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-12-08 18:57:32,104 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:32,104 INFO L402 BasicCegarLoop]: trace histogram [82, 81, 42, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:32,104 INFO L423 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:32,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:32,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514531, now seen corresponding path program 33 times [2018-12-08 18:57:32,104 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:32,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:32,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:32,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:32,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9963 backedges. 5034 proven. 2667 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:32,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:32,587 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:32,593 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 18:57:32,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-12-08 18:57:32,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:32,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9963 backedges. 5034 proven. 2667 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:32,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:32,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-12-08 18:57:32,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-12-08 18:57:32,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-12-08 18:57:32,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-12-08 18:57:32,761 INFO L87 Difference]: Start difference. First operand 256 states and 296 transitions. Second operand 45 states. [2018-12-08 18:57:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:32,856 INFO L93 Difference]: Finished difference Result 386 states and 467 transitions. [2018-12-08 18:57:32,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-08 18:57:32,856 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 255 [2018-12-08 18:57:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:32,857 INFO L225 Difference]: With dead ends: 386 [2018-12-08 18:57:32,857 INFO L226 Difference]: Without dead ends: 260 [2018-12-08 18:57:32,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-12-08 18:57:32,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-12-08 18:57:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2018-12-08 18:57:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-12-08 18:57:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 299 transitions. [2018-12-08 18:57:32,894 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 299 transitions. Word has length 255 [2018-12-08 18:57:32,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:32,894 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 299 transitions. [2018-12-08 18:57:32,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-12-08 18:57:32,894 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 299 transitions. [2018-12-08 18:57:32,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-12-08 18:57:32,894 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:32,895 INFO L402 BasicCegarLoop]: trace histogram [83, 82, 43, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:32,895 INFO L423 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:32,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:32,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1813056026, now seen corresponding path program 34 times [2018-12-08 18:57:32,895 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:32,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:32,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:32,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:32,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10209 backedges. 5152 proven. 2795 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:33,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:33,359 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:33,364 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 18:57:33,405 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 18:57:33,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:33,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10209 backedges. 5152 proven. 2795 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:33,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:33,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-12-08 18:57:33,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-12-08 18:57:33,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-12-08 18:57:33,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-12-08 18:57:33,454 INFO L87 Difference]: Start difference. First operand 259 states and 299 transitions. Second operand 46 states. [2018-12-08 18:57:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:33,547 INFO L93 Difference]: Finished difference Result 389 states and 470 transitions. [2018-12-08 18:57:33,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-12-08 18:57:33,548 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 258 [2018-12-08 18:57:33,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:33,548 INFO L225 Difference]: With dead ends: 389 [2018-12-08 18:57:33,548 INFO L226 Difference]: Without dead ends: 263 [2018-12-08 18:57:33,549 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-12-08 18:57:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-12-08 18:57:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2018-12-08 18:57:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-12-08 18:57:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 302 transitions. [2018-12-08 18:57:33,584 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 302 transitions. Word has length 258 [2018-12-08 18:57:33,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:33,584 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 302 transitions. [2018-12-08 18:57:33,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-12-08 18:57:33,584 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 302 transitions. [2018-12-08 18:57:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-12-08 18:57:33,585 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:33,585 INFO L402 BasicCegarLoop]: trace histogram [84, 83, 44, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:33,585 INFO L423 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:33,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:33,585 INFO L82 PathProgramCache]: Analyzing trace with hash -742115075, now seen corresponding path program 35 times [2018-12-08 18:57:33,585 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:33,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:33,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:33,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:33,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 5270 proven. 2926 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:34,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:34,090 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:34,097 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 18:57:34,204 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-12-08 18:57:34,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:34,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 5270 proven. 2926 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:34,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:34,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-12-08 18:57:34,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-12-08 18:57:34,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-12-08 18:57:34,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-12-08 18:57:34,256 INFO L87 Difference]: Start difference. First operand 262 states and 302 transitions. Second operand 47 states. [2018-12-08 18:57:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:34,353 INFO L93 Difference]: Finished difference Result 392 states and 473 transitions. [2018-12-08 18:57:34,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-08 18:57:34,353 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 261 [2018-12-08 18:57:34,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:34,354 INFO L225 Difference]: With dead ends: 392 [2018-12-08 18:57:34,354 INFO L226 Difference]: Without dead ends: 266 [2018-12-08 18:57:34,354 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-12-08 18:57:34,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-12-08 18:57:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2018-12-08 18:57:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-12-08 18:57:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 305 transitions. [2018-12-08 18:57:34,390 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 305 transitions. Word has length 261 [2018-12-08 18:57:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:34,391 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 305 transitions. [2018-12-08 18:57:34,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-12-08 18:57:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 305 transitions. [2018-12-08 18:57:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-12-08 18:57:34,392 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:34,392 INFO L402 BasicCegarLoop]: trace histogram [85, 84, 45, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:34,392 INFO L423 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:34,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:34,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2138997958, now seen corresponding path program 36 times [2018-12-08 18:57:34,392 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:34,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:34,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:34,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:34,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10710 backedges. 5388 proven. 3060 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:34,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:34,902 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:34,908 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 18:57:35,014 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-12-08 18:57:35,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:35,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10710 backedges. 5388 proven. 3060 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:35,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:35,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-12-08 18:57:35,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-08 18:57:35,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-08 18:57:35,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-12-08 18:57:35,091 INFO L87 Difference]: Start difference. First operand 265 states and 305 transitions. Second operand 48 states. [2018-12-08 18:57:35,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:35,182 INFO L93 Difference]: Finished difference Result 395 states and 476 transitions. [2018-12-08 18:57:35,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-08 18:57:35,182 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 264 [2018-12-08 18:57:35,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:35,182 INFO L225 Difference]: With dead ends: 395 [2018-12-08 18:57:35,182 INFO L226 Difference]: Without dead ends: 269 [2018-12-08 18:57:35,183 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-12-08 18:57:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-12-08 18:57:35,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2018-12-08 18:57:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-12-08 18:57:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 308 transitions. [2018-12-08 18:57:35,218 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 308 transitions. Word has length 264 [2018-12-08 18:57:35,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:35,218 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 308 transitions. [2018-12-08 18:57:35,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-08 18:57:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 308 transitions. [2018-12-08 18:57:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-12-08 18:57:35,219 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:35,219 INFO L402 BasicCegarLoop]: trace histogram [86, 85, 46, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:35,219 INFO L423 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:35,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:35,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1556132829, now seen corresponding path program 37 times [2018-12-08 18:57:35,219 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:35,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:35,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:35,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:35,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10965 backedges. 5506 proven. 3197 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:35,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:35,768 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:35,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:35,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10965 backedges. 5506 proven. 3197 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:35,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:35,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-12-08 18:57:35,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-12-08 18:57:35,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-12-08 18:57:35,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-12-08 18:57:35,870 INFO L87 Difference]: Start difference. First operand 268 states and 308 transitions. Second operand 49 states. [2018-12-08 18:57:35,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:35,956 INFO L93 Difference]: Finished difference Result 398 states and 479 transitions. [2018-12-08 18:57:35,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-08 18:57:35,956 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 267 [2018-12-08 18:57:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:35,957 INFO L225 Difference]: With dead ends: 398 [2018-12-08 18:57:35,957 INFO L226 Difference]: Without dead ends: 272 [2018-12-08 18:57:35,957 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-12-08 18:57:35,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2018-12-08 18:57:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2018-12-08 18:57:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-12-08 18:57:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 311 transitions. [2018-12-08 18:57:35,992 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 311 transitions. Word has length 267 [2018-12-08 18:57:35,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:35,992 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 311 transitions. [2018-12-08 18:57:35,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-12-08 18:57:35,992 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 311 transitions. [2018-12-08 18:57:35,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-12-08 18:57:35,993 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:35,993 INFO L402 BasicCegarLoop]: trace histogram [87, 86, 47, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:35,993 INFO L423 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:35,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:35,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1109355430, now seen corresponding path program 38 times [2018-12-08 18:57:35,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:35,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:35,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:35,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:57:35,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11223 backedges. 5624 proven. 3337 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:36,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:36,555 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:36,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 18:57:36,606 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 18:57:36,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:36,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11223 backedges. 5624 proven. 3337 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:36,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:36,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-12-08 18:57:36,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-12-08 18:57:36,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-12-08 18:57:36,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-12-08 18:57:36,668 INFO L87 Difference]: Start difference. First operand 271 states and 311 transitions. Second operand 50 states. [2018-12-08 18:57:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:36,769 INFO L93 Difference]: Finished difference Result 401 states and 482 transitions. [2018-12-08 18:57:36,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-12-08 18:57:36,769 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 270 [2018-12-08 18:57:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:36,770 INFO L225 Difference]: With dead ends: 401 [2018-12-08 18:57:36,770 INFO L226 Difference]: Without dead ends: 275 [2018-12-08 18:57:36,770 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-12-08 18:57:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-12-08 18:57:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2018-12-08 18:57:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-12-08 18:57:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 314 transitions. [2018-12-08 18:57:36,805 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 314 transitions. Word has length 270 [2018-12-08 18:57:36,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:36,805 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 314 transitions. [2018-12-08 18:57:36,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-12-08 18:57:36,805 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 314 transitions. [2018-12-08 18:57:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-12-08 18:57:36,806 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:36,806 INFO L402 BasicCegarLoop]: trace histogram [88, 87, 48, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:36,806 INFO L423 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:36,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:36,806 INFO L82 PathProgramCache]: Analyzing trace with hash 980256445, now seen corresponding path program 39 times [2018-12-08 18:57:36,806 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:36,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:36,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:36,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:36,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11484 backedges. 5742 proven. 3480 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:37,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:37,393 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:37,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 18:57:37,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-12-08 18:57:37,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:37,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11484 backedges. 5742 proven. 3480 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:37,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:37,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-12-08 18:57:37,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-12-08 18:57:37,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-12-08 18:57:37,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-12-08 18:57:37,560 INFO L87 Difference]: Start difference. First operand 274 states and 314 transitions. Second operand 51 states. [2018-12-08 18:57:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:37,673 INFO L93 Difference]: Finished difference Result 404 states and 485 transitions. [2018-12-08 18:57:37,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-08 18:57:37,674 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 273 [2018-12-08 18:57:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:37,674 INFO L225 Difference]: With dead ends: 404 [2018-12-08 18:57:37,674 INFO L226 Difference]: Without dead ends: 278 [2018-12-08 18:57:37,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-12-08 18:57:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-12-08 18:57:37,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2018-12-08 18:57:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-12-08 18:57:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 317 transitions. [2018-12-08 18:57:37,708 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 317 transitions. Word has length 273 [2018-12-08 18:57:37,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:37,708 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 317 transitions. [2018-12-08 18:57:37,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-12-08 18:57:37,709 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 317 transitions. [2018-12-08 18:57:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-12-08 18:57:37,710 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:37,710 INFO L402 BasicCegarLoop]: trace histogram [89, 88, 49, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:37,710 INFO L423 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:37,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:37,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1351636346, now seen corresponding path program 40 times [2018-12-08 18:57:37,710 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:37,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:37,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:37,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:37,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11748 backedges. 5860 proven. 3626 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:38,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:38,320 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:38,327 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 18:57:38,364 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 18:57:38,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:38,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11748 backedges. 5860 proven. 3626 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2018-12-08 18:57:38,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:38,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-12-08 18:57:38,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-08 18:57:38,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-08 18:57:38,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-08 18:57:38,426 INFO L87 Difference]: Start difference. First operand 277 states and 317 transitions. Second operand 52 states. [2018-12-08 18:57:38,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:38,547 INFO L93 Difference]: Finished difference Result 444 states and 525 transitions. [2018-12-08 18:57:38,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-12-08 18:57:38,547 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 276 [2018-12-08 18:57:38,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:38,548 INFO L225 Difference]: With dead ends: 444 [2018-12-08 18:57:38,548 INFO L226 Difference]: Without dead ends: 318 [2018-12-08 18:57:38,548 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-08 18:57:38,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-12-08 18:57:38,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 280. [2018-12-08 18:57:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-12-08 18:57:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 320 transitions. [2018-12-08 18:57:38,582 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 320 transitions. Word has length 276 [2018-12-08 18:57:38,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:38,582 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 320 transitions. [2018-12-08 18:57:38,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-08 18:57:38,582 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 320 transitions. [2018-12-08 18:57:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-12-08 18:57:38,583 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:38,583 INFO L402 BasicCegarLoop]: trace histogram [90, 89, 50, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:38,583 INFO L423 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:38,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:38,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1294512541, now seen corresponding path program 41 times [2018-12-08 18:57:38,583 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:38,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:38,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:38,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:38,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 7255 proven. 4642 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-12-08 18:57:39,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:39,256 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:39,261 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 18:57:39,382 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-12-08 18:57:39,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:39,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 7255 proven. 4642 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-12-08 18:57:39,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:39,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-12-08 18:57:39,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-12-08 18:57:39,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-12-08 18:57:39,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-08 18:57:39,442 INFO L87 Difference]: Start difference. First operand 280 states and 320 transitions. Second operand 53 states. [2018-12-08 18:57:40,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:57:40,041 INFO L93 Difference]: Finished difference Result 1616 states and 2106 transitions. [2018-12-08 18:57:40,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-08 18:57:40,042 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 279 [2018-12-08 18:57:40,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:57:40,045 INFO L225 Difference]: With dead ends: 1616 [2018-12-08 18:57:40,045 INFO L226 Difference]: Without dead ends: 1611 [2018-12-08 18:57:40,045 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-08 18:57:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2018-12-08 18:57:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 313. [2018-12-08 18:57:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-12-08 18:57:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 364 transitions. [2018-12-08 18:57:40,135 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 364 transitions. Word has length 279 [2018-12-08 18:57:40,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:57:40,135 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 364 transitions. [2018-12-08 18:57:40,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-12-08 18:57:40,135 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 364 transitions. [2018-12-08 18:57:40,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-12-08 18:57:40,136 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:57:40,136 INFO L402 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:57:40,136 INFO L423 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:57:40,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:57:40,136 INFO L82 PathProgramCache]: Analyzing trace with hash -644776136, now seen corresponding path program 42 times [2018-12-08 18:57:40,136 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:57:40,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:57:40,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:40,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:57:40,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:57:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:57:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 7648 proven. 3876 refuted. 0 times theorem prover too weak. 3626 trivial. 0 not checked. [2018-12-08 18:57:41,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:57:41,169 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:57:41,176 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 18:57:41,318 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 101 check-sat command(s) [2018-12-08 18:57:41,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 18:57:41,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:57:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 18:57:53,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:57:53,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 205] total 256 [2018-12-08 18:57:53,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 256 states [2018-12-08 18:57:53,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 256 interpolants. [2018-12-08 18:57:53,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=64468, Unknown=0, NotChecked=0, Total=65280 [2018-12-08 18:57:53,339 INFO L87 Difference]: Start difference. First operand 313 states and 364 transitions. Second operand 256 states. [2018-12-08 18:58:09,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:58:09,303 INFO L93 Difference]: Finished difference Result 4548 states and 6025 transitions. [2018-12-08 18:58:09,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2018-12-08 18:58:09,304 INFO L78 Accepts]: Start accepts. Automaton has 256 states. Word has length 312 [2018-12-08 18:58:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:58:09,310 INFO L225 Difference]: With dead ends: 4548 [2018-12-08 18:58:09,310 INFO L226 Difference]: Without dead ends: 4386 [2018-12-08 18:58:09,312 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15805 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=816, Invalid=64976, Unknown=0, NotChecked=0, Total=65792 [2018-12-08 18:58:09,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2018-12-08 18:58:11,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 4190. [2018-12-08 18:58:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4190 states. [2018-12-08 18:58:11,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4190 states to 4190 states and 4290 transitions. [2018-12-08 18:58:11,399 INFO L78 Accepts]: Start accepts. Automaton has 4190 states and 4290 transitions. Word has length 312 [2018-12-08 18:58:11,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:58:11,399 INFO L480 AbstractCegarLoop]: Abstraction has 4190 states and 4290 transitions. [2018-12-08 18:58:11,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 256 states. [2018-12-08 18:58:11,399 INFO L276 IsEmpty]: Start isEmpty. Operand 4190 states and 4290 transitions. [2018-12-08 18:58:11,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-12-08 18:58:11,400 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:58:11,400 INFO L402 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:58:11,400 INFO L423 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:58:11,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:58:11,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1847249315, now seen corresponding path program 43 times [2018-12-08 18:58:11,401 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 18:58:11,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 18:58:11,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:58:11,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 18:58:11,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:58:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:58:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-12-08 18:58:12,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:58:12,084 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:58:12,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:58:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:58:12,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:58:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-12-08 18:58:12,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 18:58:12,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-12-08 18:58:12,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-12-08 18:58:12,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-12-08 18:58:12,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-12-08 18:58:12,210 INFO L87 Difference]: Start difference. First operand 4190 states and 4290 transitions. Second operand 54 states. [2018-12-08 18:58:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:58:12,538 INFO L93 Difference]: Finished difference Result 4341 states and 4441 transitions. [2018-12-08 18:58:12,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-12-08 18:58:12,538 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 315 [2018-12-08 18:58:12,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:58:12,539 INFO L225 Difference]: With dead ends: 4341 [2018-12-08 18:58:12,539 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 18:58:12,543 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-12-08 18:58:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 18:58:12,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 18:58:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 18:58:12,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 18:58:12,544 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 315 [2018-12-08 18:58:12,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:58:12,544 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 18:58:12,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-12-08 18:58:12,544 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 18:58:12,544 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 18:58:12,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-08 18:58:16,410 WARN L180 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 1950 DAG size of output: 1530 [2018-12-08 18:58:28,767 WARN L180 SmtUtils]: Spent 12.34 s on a formula simplification. DAG size of input: 1526 DAG size of output: 495 [2018-12-08 18:58:28,771 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-08 18:58:28,771 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-08 18:58:28,771 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-08 18:58:28,771 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-08 18:58:28,771 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-08 18:58:28,771 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-08 18:58:28,771 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 25) the Hoare annotation is: true [2018-12-08 18:58:28,771 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 25) no Hoare annotation was computed. [2018-12-08 18:58:28,771 INFO L448 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-12-08 18:58:28,771 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 19) no Hoare annotation was computed. [2018-12-08 18:58:28,771 INFO L448 ceAbstractionStarter]: For program point L15-2(lines 14 22) no Hoare annotation was computed. [2018-12-08 18:58:28,771 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 25) no Hoare annotation was computed. [2018-12-08 18:58:28,772 INFO L444 ceAbstractionStarter]: At program point L14-2(lines 14 22) the Hoare annotation is: (let ((.cse4 (<= main_~y~0 14)) (.cse5 (<= 14 main_~y~0)) (.cse2 (<= 0 main_~y~0)) (.cse3 (<= main_~y~0 0)) (.cse1 (<= 30 main_~y~0)) (.cse0 (<= main_~y~0 30)) (.cse13 (<= main_~y~0 23)) (.cse12 (<= 23 main_~y~0)) (.cse15 (<= 39 main_~y~0)) (.cse14 (<= main_~y~0 39)) (.cse10 (<= 44 main_~y~0)) (.cse11 (<= main_~y~0 44)) (.cse16 (<= 32 main_~y~0)) (.cse17 (<= main_~y~0 32)) (.cse7 (<= 47 main_~y~0)) (.cse6 (<= main_~y~0 47)) (.cse9 (<= 17 main_~y~0)) (.cse8 (<= main_~y~0 17)) (.cse18 (<= 19 main_~y~0)) (.cse19 (<= main_~y~0 19))) (or (and (= main_~x~0 50) (= main_~y~0 50)) (and (= main_~x~0 8) (<= 8 main_~y~0) (<= main_~y~0 8)) (and (= main_~y~0 25) (= main_~x~0 25)) (and (= 18 main_~y~0) (= main_~x~0 82)) (and (= main_~x~0 30) .cse0 .cse1) (and (and (<= 7 main_~y~0) (= main_~x~0 93)) (<= main_~y~0 7)) (and (<= main_~y~0 34) (and (<= 66 main_~x~0) (<= main_~x~0 66) (<= 34 main_~y~0))) (and (= main_~y~0 46) (= main_~x~0 46)) (and (= main_~x~0 48) (= main_~y~0 48)) (and (= main_~x~0 0) .cse2 .cse3) (and (= 35 main_~y~0) (= main_~x~0 65)) (and (<= main_~y~0 13) (and (<= 13 main_~y~0) (= main_~x~0 87))) (and (= main_~x~0 58) (= 42 main_~y~0)) (and (= main_~x~0 36) (= main_~y~0 36)) (and (and (<= 25 main_~y~0) (<= main_~x~0 75) (<= 75 main_~x~0)) (<= main_~y~0 25)) (and (<= main_~y~0 35) (<= 35 main_~y~0) (= main_~x~0 35)) (and (<= main_~y~0 28) (and (<= 28 main_~y~0) (<= 72 main_~x~0) (<= main_~x~0 72))) (and (= main_~x~0 34) (= main_~y~0 34)) (and .cse4 (= main_~x~0 14) .cse5) (and (<= main_~y~0 2) (and (= main_~x~0 98) (<= 2 main_~y~0))) (and (= main_~y~0 15) (= main_~x~0 15)) (and (= main_~y~0 40) (= main_~x~0 40)) (and (= main_~x~0 29) (= main_~y~0 29)) (and (= main_~x~0 45) (= main_~y~0 45)) (and .cse6 (and (<= 53 main_~x~0) (<= main_~x~0 53) .cse7)) (and (= main_~x~0 52) (= 48 main_~y~0)) (and (<= main_~y~0 29) (and (<= 71 main_~x~0) (<= 29 main_~y~0) (<= main_~x~0 71))) (and .cse4 (and .cse5 (<= main_~x~0 86) (<= 86 main_~x~0))) (and (= main_~x~0 5) (= main_~y~0 5)) (and (= main_~x~0 10) (= main_~y~0 10)) (and (= main_~x~0 24) (= main_~y~0 24)) (and (= main_~x~0 88) (= 12 main_~y~0)) (and .cse8 .cse9 (= main_~x~0 17)) (and (= main_~x~0 27) (= main_~y~0 27)) (and (= 24 main_~y~0) (= main_~x~0 76)) (and (= main_~x~0 22) (= main_~y~0 22)) (and (<= main_~x~0 100) .cse2 (<= 100 main_~x~0) .cse3) (and (and (<= 80 main_~x~0) (<= main_~x~0 80) (<= 20 main_~y~0)) (<= main_~y~0 20)) (and (= main_~x~0 7) (= main_~y~0 7)) (and (= main_~x~0 38) (= main_~y~0 38)) (and (= 8 main_~y~0) (= main_~x~0 92)) (and (= main_~x~0 78) (= 22 main_~y~0)) (and (= main_~x~0 49) (= main_~y~0 49)) (and (<= main_~y~0 36) (and (= main_~x~0 64) (<= 36 main_~y~0))) (and (= main_~x~0 1) (= main_~y~0 1)) (and (= main_~x~0 12) (= main_~y~0 12)) (and (= 3 main_~y~0) (= main_~x~0 97)) (and (= main_~x~0 37) (= main_~y~0 37)) (and (= main_~x~0 44) .cse10 .cse11) (and (= 43 main_~y~0) (= main_~x~0 57)) (and (= main_~y~0 21) (= main_~x~0 21)) (and (and (<= main_~x~0 85) (<= 85 main_~x~0) (<= 15 main_~y~0)) (<= main_~y~0 15)) (and (= 37 main_~y~0) (= main_~x~0 63)) (and (= main_~x~0 51) (= 49 main_~y~0)) (and (= main_~y~0 11) (= main_~x~0 11)) (and .cse12 .cse13 (= main_~x~0 23)) (and (= main_~x~0 28) (= main_~y~0 28)) (and (= main_~y~0 41) (= main_~x~0 41)) (and (= main_~x~0 39) .cse14 .cse15) (and (and .cse1 (= main_~x~0 70)) .cse0) (and (<= main_~y~0 16) (and (= main_~x~0 84) (<= 16 main_~y~0))) (and (and (<= 68 main_~x~0) .cse16 (<= main_~x~0 68)) .cse17) (and (= main_~x~0 9) (= main_~y~0 9)) (and (= main_~x~0 20) (= main_~y~0 20)) (and (<= main_~y~0 41) (and (<= 41 main_~y~0) (<= 59 main_~x~0) (<= main_~x~0 59))) (and .cse13 (and (<= 77 main_~x~0) (<= main_~x~0 77) .cse12)) (and (and (<= main_~x~0 99) (<= 1 main_~y~0) (<= 99 main_~x~0)) (<= main_~y~0 1)) (and (and .cse15 (<= 61 main_~x~0) (<= main_~x~0 61)) .cse14) (and (= main_~x~0 4) (= main_~y~0 4)) (and (= main_~x~0 18) (= main_~y~0 18)) (and (<= main_~y~0 4) (and (<= main_~x~0 96) (<= 4 main_~y~0) (<= 96 main_~x~0))) (and (= main_~y~0 33) (= main_~x~0 33)) (and (= main_~x~0 13) (= main_~y~0 13)) (and (<= main_~y~0 10) (and (<= 10 main_~y~0) (= main_~x~0 90))) (and (<= main_~y~0 40) (and (<= 40 main_~y~0) (<= main_~x~0 60) (<= 60 main_~x~0))) (and (= main_~y~0 31) (= main_~x~0 31)) (and (= main_~x~0 43) (<= 43 main_~y~0) (<= main_~y~0 43)) (and (= main_~x~0 89) (= 11 main_~y~0)) (and (and (= main_~x~0 56) .cse10) .cse11) (and (= main_~x~0 26) (= main_~y~0 26)) (and (= main_~x~0 69) (= 31 main_~y~0)) (and (and (<= 6 main_~y~0) (<= 94 main_~x~0) (<= main_~x~0 94)) (<= main_~y~0 6)) (and (<= main_~y~0 3) (<= 3 main_~y~0) (= main_~x~0 3)) (and (and (<= 46 main_~y~0) (<= 54 main_~x~0) (<= main_~x~0 54)) (<= main_~y~0 46)) (and (and (<= 74 main_~x~0) (<= 26 main_~y~0) (<= main_~x~0 74)) (<= main_~y~0 26)) (and (= main_~y~0 16) (= main_~x~0 16)) (and (and (= main_~x~0 81) .cse18) .cse19) (and (<= main_~y~0 45) (and (<= 45 main_~y~0) (<= main_~x~0 55) (<= 55 main_~x~0))) (and (= main_~x~0 91) (= 9 main_~y~0)) (and .cse16 .cse17 (= main_~x~0 32)) (and (<= main_~y~0 21) (and (<= 21 main_~y~0) (= main_~x~0 79))) (and (<= main_~y~0 33) (and (<= 33 main_~y~0) (<= 67 main_~x~0) (<= main_~x~0 67))) (and (= main_~x~0 2) (= main_~y~0 2)) (and (= main_~x~0 42) (= main_~y~0 42)) (and .cse7 .cse6 (= main_~x~0 47)) (and (and .cse9 (<= 83 main_~x~0) (<= main_~x~0 83)) .cse8) (and .cse18 (= main_~x~0 19) .cse19) (and (<= main_~y~0 5) (and (<= main_~x~0 95) (<= 5 main_~y~0) (<= 95 main_~x~0))) (and (= main_~x~0 6) (= main_~y~0 6)) (and (and (<= main_~x~0 73) (<= 73 main_~x~0) (<= 27 main_~y~0)) (<= main_~y~0 27)) (and (<= main_~y~0 38) (and (<= 62 main_~x~0) (<= main_~x~0 62) (<= 38 main_~y~0))))) [2018-12-08 18:58:28,772 INFO L444 ceAbstractionStarter]: At program point L14-3(lines 14 22) the Hoare annotation is: (and (<= main_~x~0 100) (<= 100 main_~x~0)) [2018-12-08 18:58:28,772 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-12-08 18:58:28,773 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-08 18:58:28,773 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-12-08 18:58:28,773 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-08 18:58:28,773 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-08 18:58:28,773 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-12-08 18:58:28,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 06:58:28 BoogieIcfgContainer [2018-12-08 18:58:28,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 18:58:28,790 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 18:58:28,790 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 18:58:28,790 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 18:58:28,790 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 06:57:16" (3/4) ... [2018-12-08 18:58:28,793 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 18:58:28,797 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 18:58:28,798 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 18:58:28,798 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-08 18:58:28,800 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-12-08 18:58:28,800 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-12-08 18:58:28,800 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 18:58:28,823 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_765b39f9-44ad-4306-80cd-b08c0636a25b/bin-2019/uautomizer/witness.graphml [2018-12-08 18:58:28,823 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 18:58:28,824 INFO L168 Benchmark]: Toolchain (without parser) took 72315.35 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 734.5 MB). Free memory was 961.3 MB in the beginning and 1.2 GB in the end (delta: -243.1 MB). Peak memory consumption was 491.4 MB. Max. memory is 11.5 GB. [2018-12-08 18:58:28,824 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 18:58:28,824 INFO L168 Benchmark]: CACSL2BoogieTranslator took 128.60 ms. Allocated memory is still 1.0 GB. Free memory was 961.3 MB in the beginning and 950.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 18:58:28,824 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.03 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 18:58:28,825 INFO L168 Benchmark]: Boogie Preprocessor took 15.88 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 18:58:28,825 INFO L168 Benchmark]: RCFGBuilder took 147.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -163.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-08 18:58:28,825 INFO L168 Benchmark]: TraceAbstraction took 71971.28 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 601.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -108.7 MB). Peak memory consumption was 923.3 MB. Max. memory is 11.5 GB. [2018-12-08 18:58:28,825 INFO L168 Benchmark]: Witness Printer took 33.28 ms. Allocated memory is still 1.8 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2018-12-08 18:58:28,826 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 128.60 ms. Allocated memory is still 1.0 GB. Free memory was 961.3 MB in the beginning and 950.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.03 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.88 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 147.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -163.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 71971.28 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 601.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -108.7 MB). Peak memory consumption was 923.3 MB. Max. memory is 11.5 GB. * Witness Printer took 33.28 ms. Allocated memory is still 1.8 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((x == 50 && y == 50) || ((x == 8 && 8 <= y) && y <= 8)) || (y == 25 && x == 25)) || (18 == y && x == 82)) || ((x == 30 && y <= 30) && 30 <= y)) || ((7 <= y && x == 93) && y <= 7)) || (y <= 34 && (66 <= x && x <= 66) && 34 <= y)) || (y == 46 && x == 46)) || (x == 48 && y == 48)) || ((x == 0 && 0 <= y) && y <= 0)) || (35 == y && x == 65)) || (y <= 13 && 13 <= y && x == 87)) || (x == 58 && 42 == y)) || (x == 36 && y == 36)) || (((25 <= y && x <= 75) && 75 <= x) && y <= 25)) || ((y <= 35 && 35 <= y) && x == 35)) || (y <= 28 && (28 <= y && 72 <= x) && x <= 72)) || (x == 34 && y == 34)) || ((y <= 14 && x == 14) && 14 <= y)) || (y <= 2 && x == 98 && 2 <= y)) || (y == 15 && x == 15)) || (y == 40 && x == 40)) || (x == 29 && y == 29)) || (x == 45 && y == 45)) || (y <= 47 && (53 <= x && x <= 53) && 47 <= y)) || (x == 52 && 48 == y)) || (y <= 29 && (71 <= x && 29 <= y) && x <= 71)) || (y <= 14 && (14 <= y && x <= 86) && 86 <= x)) || (x == 5 && y == 5)) || (x == 10 && y == 10)) || (x == 24 && y == 24)) || (x == 88 && 12 == y)) || ((y <= 17 && 17 <= y) && x == 17)) || (x == 27 && y == 27)) || (24 == y && x == 76)) || (x == 22 && y == 22)) || (((x <= 100 && 0 <= y) && 100 <= x) && y <= 0)) || (((80 <= x && x <= 80) && 20 <= y) && y <= 20)) || (x == 7 && y == 7)) || (x == 38 && y == 38)) || (8 == y && x == 92)) || (x == 78 && 22 == y)) || (x == 49 && y == 49)) || (y <= 36 && x == 64 && 36 <= y)) || (x == 1 && y == 1)) || (x == 12 && y == 12)) || (3 == y && x == 97)) || (x == 37 && y == 37)) || ((x == 44 && 44 <= y) && y <= 44)) || (43 == y && x == 57)) || (y == 21 && x == 21)) || (((x <= 85 && 85 <= x) && 15 <= y) && y <= 15)) || (37 == y && x == 63)) || (x == 51 && 49 == y)) || (y == 11 && x == 11)) || ((23 <= y && y <= 23) && x == 23)) || (x == 28 && y == 28)) || (y == 41 && x == 41)) || ((x == 39 && y <= 39) && 39 <= y)) || ((30 <= y && x == 70) && y <= 30)) || (y <= 16 && x == 84 && 16 <= y)) || (((68 <= x && 32 <= y) && x <= 68) && y <= 32)) || (x == 9 && y == 9)) || (x == 20 && y == 20)) || (y <= 41 && (41 <= y && 59 <= x) && x <= 59)) || (y <= 23 && (77 <= x && x <= 77) && 23 <= y)) || (((x <= 99 && 1 <= y) && 99 <= x) && y <= 1)) || (((39 <= y && 61 <= x) && x <= 61) && y <= 39)) || (x == 4 && y == 4)) || (x == 18 && y == 18)) || (y <= 4 && (x <= 96 && 4 <= y) && 96 <= x)) || (y == 33 && x == 33)) || (x == 13 && y == 13)) || (y <= 10 && 10 <= y && x == 90)) || (y <= 40 && (40 <= y && x <= 60) && 60 <= x)) || (y == 31 && x == 31)) || ((x == 43 && 43 <= y) && y <= 43)) || (x == 89 && 11 == y)) || ((x == 56 && 44 <= y) && y <= 44)) || (x == 26 && y == 26)) || (x == 69 && 31 == y)) || (((6 <= y && 94 <= x) && x <= 94) && y <= 6)) || ((y <= 3 && 3 <= y) && x == 3)) || (((46 <= y && 54 <= x) && x <= 54) && y <= 46)) || (((74 <= x && 26 <= y) && x <= 74) && y <= 26)) || (y == 16 && x == 16)) || ((x == 81 && 19 <= y) && y <= 19)) || (y <= 45 && (45 <= y && x <= 55) && 55 <= x)) || (x == 91 && 9 == y)) || ((32 <= y && y <= 32) && x == 32)) || (y <= 21 && 21 <= y && x == 79)) || (y <= 33 && (33 <= y && 67 <= x) && x <= 67)) || (x == 2 && y == 2)) || (x == 42 && y == 42)) || ((47 <= y && y <= 47) && x == 47)) || (((17 <= y && 83 <= x) && x <= 83) && y <= 17)) || ((19 <= y && x == 19) && y <= 19)) || (y <= 5 && (x <= 95 && 5 <= y) && 95 <= x)) || (x == 6 && y == 6)) || (((x <= 73 && 73 <= x) && 27 <= y) && y <= 27)) || (y <= 38 && (62 <= x && x <= 62) && 38 <= y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 71.9s OverallTime, 46 OverallIterations, 102 TraceHistogramMax, 21.9s AutomataDifference, 0.0s DeadEndRemovalTime, 16.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 892 SDtfs, 1206 SDslu, 49837 SDs, 0 SdLazy, 65204 SolverSat, 1671 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8381 GetRequests, 6596 SyntacticMatches, 2 SemanticMatches, 1783 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27936 ImplicationChecksByTransitivity, 26.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4190occurred in iteration=45, 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: 2.8s AutomataMinimizationTime, 46 MinimizatonAttempts, 2996 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 53 PreInvPairs, 155 NumberOfFragments, 976 HoareAnnotationTreeSize, 53 FomulaSimplifications, 5205950 FormulaSimplificationTreeSizeReduction, 3.8s HoareSimplificationTime, 7 FomulaSimplificationsInter, 974803 FormulaSimplificationTreeSizeReductionInter, 12.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 27.1s InterpolantComputationTime, 13576 NumberOfCodeBlocks, 13537 NumberOfCodeBlocksAsserted, 1120 NumberOfCheckSat, 13487 ConstructedInterpolants, 0 QuantifiedInterpolants, 6972397 SizeOfPredicates, 45 NumberOfNonLiveVariables, 15708 ConjunctsInSsa, 1783 ConjunctsInUnsatCore, 89 InterpolantComputations, 3 PerfectInterpolantSequences, 283809/437292 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...