./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i20_o20_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i20_o20_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d7026bf672987d88e3a6ea48c2c5a690fd9a5f2 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-01 18:12:09,266 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 18:12:09,266 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 18:12:09,272 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 18:12:09,273 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 18:12:09,273 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 18:12:09,274 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 18:12:09,275 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 18:12:09,276 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 18:12:09,276 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 18:12:09,277 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 18:12:09,277 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 18:12:09,277 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 18:12:09,278 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 18:12:09,278 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 18:12:09,279 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 18:12:09,279 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 18:12:09,280 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 18:12:09,281 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 18:12:09,281 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 18:12:09,282 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 18:12:09,283 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 18:12:09,284 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 18:12:09,284 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 18:12:09,284 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 18:12:09,284 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 18:12:09,285 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 18:12:09,285 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 18:12:09,286 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 18:12:09,286 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 18:12:09,286 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 18:12:09,287 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 18:12:09,287 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 18:12:09,287 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 18:12:09,287 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 18:12:09,288 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 18:12:09,288 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-01 18:12:09,295 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 18:12:09,295 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 18:12:09,295 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 18:12:09,295 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 18:12:09,296 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 18:12:09,296 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 18:12:09,296 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 18:12:09,296 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 18:12:09,296 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 18:12:09,296 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 18:12:09,296 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 18:12:09,296 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 18:12:09,296 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 18:12:09,297 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 18:12:09,297 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 18:12:09,297 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 18:12:09,297 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 18:12:09,297 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 18:12:09,297 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 18:12:09,297 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 18:12:09,297 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 18:12:09,297 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 18:12:09,297 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 18:12:09,297 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 18:12:09,298 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 18:12:09,298 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 18:12:09,298 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 18:12:09,298 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 18:12:09,298 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 18:12:09,298 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 18:12:09,298 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_84c39c39-52e9-4a21-9982-78bca781492d/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d7026bf672987d88e3a6ea48c2c5a690fd9a5f2 [2018-12-01 18:12:09,315 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 18:12:09,322 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 18:12:09,324 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 18:12:09,325 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 18:12:09,325 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 18:12:09,325 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i20_o20_true-unreach-call_true-termination.c [2018-12-01 18:12:09,358 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/bin-2019/uautomizer/data/de3d154c6/acd535cd472d4e48a765725820b47211/FLAGab381429b [2018-12-01 18:12:09,727 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 18:12:09,728 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/sv-benchmarks/c/recursive-simple/id_i20_o20_true-unreach-call_true-termination.c [2018-12-01 18:12:09,731 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/bin-2019/uautomizer/data/de3d154c6/acd535cd472d4e48a765725820b47211/FLAGab381429b [2018-12-01 18:12:09,739 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/bin-2019/uautomizer/data/de3d154c6/acd535cd472d4e48a765725820b47211 [2018-12-01 18:12:09,741 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 18:12:09,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 18:12:09,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 18:12:09,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 18:12:09,744 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 18:12:09,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 06:12:09" (1/1) ... [2018-12-01 18:12:09,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@359bc049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:12:09, skipping insertion in model container [2018-12-01 18:12:09,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 06:12:09" (1/1) ... [2018-12-01 18:12:09,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 18:12:09,758 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 18:12:09,838 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 18:12:09,841 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 18:12:09,849 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 18:12:09,856 INFO L195 MainTranslator]: Completed translation [2018-12-01 18:12:09,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:12:09 WrapperNode [2018-12-01 18:12:09,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 18:12:09,857 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 18:12:09,857 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 18:12:09,857 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 18:12:09,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:12:09" (1/1) ... [2018-12-01 18:12:09,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:12:09" (1/1) ... [2018-12-01 18:12:09,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 18:12:09,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 18:12:09,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 18:12:09,869 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 18:12:09,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:12:09" (1/1) ... [2018-12-01 18:12:09,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:12:09" (1/1) ... [2018-12-01 18:12:09,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:12:09" (1/1) ... [2018-12-01 18:12:09,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:12:09" (1/1) ... [2018-12-01 18:12:09,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:12:09" (1/1) ... [2018-12-01 18:12:09,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:12:09" (1/1) ... [2018-12-01 18:12:09,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:12:09" (1/1) ... [2018-12-01 18:12:09,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 18:12:09,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 18:12:09,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 18:12:09,879 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 18:12:09,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:12:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:09,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 18:12:09,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 18:12:09,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 18:12:09,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 18:12:09,942 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 18:12:09,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 18:12:09,943 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-01 18:12:09,943 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-01 18:12:10,018 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 18:12:10,019 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-01 18:12:10,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 06:12:10 BoogieIcfgContainer [2018-12-01 18:12:10,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 18:12:10,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 18:12:10,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 18:12:10,021 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 18:12:10,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 06:12:09" (1/3) ... [2018-12-01 18:12:10,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153a75b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 06:12:10, skipping insertion in model container [2018-12-01 18:12:10,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:12:09" (2/3) ... [2018-12-01 18:12:10,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153a75b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 06:12:10, skipping insertion in model container [2018-12-01 18:12:10,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 06:12:10" (3/3) ... [2018-12-01 18:12:10,023 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i20_o20_true-unreach-call_true-termination.c [2018-12-01 18:12:10,029 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 18:12:10,033 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-01 18:12:10,043 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-01 18:12:10,060 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 18:12:10,061 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 18:12:10,061 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 18:12:10,061 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 18:12:10,061 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 18:12:10,061 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 18:12:10,061 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 18:12:10,061 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 18:12:10,061 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 18:12:10,072 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-01 18:12:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-01 18:12:10,075 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:10,076 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:10,077 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:10,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:10,081 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-12-01 18:12:10,082 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:10,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:10,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:10,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:12:10,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:12:10,178 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 18:12:10,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 18:12:10,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 18:12:10,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 18:12:10,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 18:12:10,191 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-12-01 18:12:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:10,244 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-12-01 18:12:10,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 18:12:10,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-01 18:12:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:10,254 INFO L225 Difference]: With dead ends: 30 [2018-12-01 18:12:10,254 INFO L226 Difference]: Without dead ends: 18 [2018-12-01 18:12:10,256 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-01 18:12:10,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-01 18:12:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-01 18:12:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-01 18:12:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-01 18:12:10,282 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-12-01 18:12:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:10,282 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-01 18:12:10,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 18:12:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-01 18:12:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-01 18:12:10,284 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:10,284 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:10,284 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:10,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:10,284 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-12-01 18:12:10,285 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:10,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:10,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:10,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:12:10,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-01 18:12:10,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:10,331 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:10,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:12:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:10,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-01 18:12:10,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:10,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-01 18:12:10,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 18:12:10,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 18:12:10,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-01 18:12:10,393 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-12-01 18:12:10,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:10,431 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-12-01 18:12:10,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 18:12:10,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-12-01 18:12:10,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:10,432 INFO L225 Difference]: With dead ends: 25 [2018-12-01 18:12:10,432 INFO L226 Difference]: Without dead ends: 21 [2018-12-01 18:12:10,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-01 18:12:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-01 18:12:10,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-01 18:12:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-01 18:12:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-01 18:12:10,437 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-12-01 18:12:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:10,438 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-01 18:12:10,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 18:12:10,438 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-01 18:12:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-01 18:12:10,439 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:10,439 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:10,439 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:10,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:10,439 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-12-01 18:12:10,439 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:10,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:10,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:10,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:12:10,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-01 18:12:10,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:10,496 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:10,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 18:12:10,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 18:12:10,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:10,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-01 18:12:10,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:10,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-01 18:12:10,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-01 18:12:10,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-01 18:12:10,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-01 18:12:10,539 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-12-01 18:12:10,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:10,575 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-12-01 18:12:10,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 18:12:10,575 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-12-01 18:12:10,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:10,575 INFO L225 Difference]: With dead ends: 28 [2018-12-01 18:12:10,575 INFO L226 Difference]: Without dead ends: 24 [2018-12-01 18:12:10,576 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-01 18:12:10,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-01 18:12:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-01 18:12:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-01 18:12:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-01 18:12:10,579 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-12-01 18:12:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:10,579 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-01 18:12:10,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-01 18:12:10,579 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-01 18:12:10,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-01 18:12:10,579 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:10,579 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:10,580 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:10,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:10,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-12-01 18:12:10,580 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:10,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:10,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:10,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:10,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-01 18:12:10,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:10,626 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:10,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 18:12:10,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-01 18:12:10,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:10,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-01 18:12:10,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:10,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-01 18:12:10,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-01 18:12:10,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-01 18:12:10,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-01 18:12:10,685 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-12-01 18:12:10,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:10,719 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-12-01 18:12:10,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 18:12:10,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-12-01 18:12:10,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:10,720 INFO L225 Difference]: With dead ends: 31 [2018-12-01 18:12:10,720 INFO L226 Difference]: Without dead ends: 27 [2018-12-01 18:12:10,720 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-01 18:12:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-01 18:12:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-01 18:12:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-01 18:12:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-01 18:12:10,723 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-12-01 18:12:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:10,723 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-01 18:12:10,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-01 18:12:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-01 18:12:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-01 18:12:10,724 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:10,724 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:10,724 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:10,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:10,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-12-01 18:12:10,724 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:10,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:10,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:10,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:10,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-01 18:12:10,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:10,776 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:10,783 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 18:12:10,792 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 18:12:10,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:10,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-01 18:12:10,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:10,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-01 18:12:10,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 18:12:10,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 18:12:10,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-01 18:12:10,823 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-12-01 18:12:10,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:10,879 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-12-01 18:12:10,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 18:12:10,879 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-12-01 18:12:10,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:10,880 INFO L225 Difference]: With dead ends: 34 [2018-12-01 18:12:10,880 INFO L226 Difference]: Without dead ends: 30 [2018-12-01 18:12:10,880 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-01 18:12:10,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-01 18:12:10,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-01 18:12:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-01 18:12:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-12-01 18:12:10,883 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-12-01 18:12:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:10,884 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-12-01 18:12:10,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 18:12:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-12-01 18:12:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-01 18:12:10,884 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:10,884 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:10,885 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:10,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:10,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-12-01 18:12:10,885 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:10,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:10,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:10,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:10,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-01 18:12:10,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:10,947 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:10,955 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 18:12:10,966 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-01 18:12:10,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:10,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-01 18:12:10,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:10,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-12-01 18:12:10,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-01 18:12:10,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-01 18:12:10,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-01 18:12:10,994 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-12-01 18:12:11,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:11,063 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-12-01 18:12:11,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-01 18:12:11,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-12-01 18:12:11,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:11,064 INFO L225 Difference]: With dead ends: 37 [2018-12-01 18:12:11,064 INFO L226 Difference]: Without dead ends: 33 [2018-12-01 18:12:11,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-12-01 18:12:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-01 18:12:11,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-01 18:12:11,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-01 18:12:11,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-12-01 18:12:11,068 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-12-01 18:12:11,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:11,068 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-12-01 18:12:11,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-01 18:12:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-12-01 18:12:11,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-01 18:12:11,069 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:11,069 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:11,070 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:11,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:11,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-12-01 18:12:11,070 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:11,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:11,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:11,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:11,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-01 18:12:11,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:11,144 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:11,150 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 18:12:11,164 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-01 18:12:11,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:11,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-01 18:12:11,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:11,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-12-01 18:12:11,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-01 18:12:11,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-01 18:12:11,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-01 18:12:11,193 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-12-01 18:12:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:11,260 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-12-01 18:12:11,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-01 18:12:11,260 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-12-01 18:12:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:11,261 INFO L225 Difference]: With dead ends: 40 [2018-12-01 18:12:11,261 INFO L226 Difference]: Without dead ends: 36 [2018-12-01 18:12:11,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-01 18:12:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-01 18:12:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-12-01 18:12:11,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-01 18:12:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-12-01 18:12:11,267 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-12-01 18:12:11,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:11,267 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-12-01 18:12:11,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-01 18:12:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-12-01 18:12:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-01 18:12:11,268 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:11,268 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:11,269 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:11,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:11,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-12-01 18:12:11,269 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:11,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:11,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:11,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:11,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-01 18:12:11,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:11,345 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:11,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:12:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:11,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-01 18:12:11,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:11,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-12-01 18:12:11,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-01 18:12:11,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-01 18:12:11,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-01 18:12:11,390 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-12-01 18:12:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:11,498 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-12-01 18:12:11,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-01 18:12:11,499 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-12-01 18:12:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:11,500 INFO L225 Difference]: With dead ends: 43 [2018-12-01 18:12:11,500 INFO L226 Difference]: Without dead ends: 39 [2018-12-01 18:12:11,501 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-12-01 18:12:11,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-01 18:12:11,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-01 18:12:11,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-01 18:12:11,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-12-01 18:12:11,505 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-12-01 18:12:11,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:11,505 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-12-01 18:12:11,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-01 18:12:11,505 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-12-01 18:12:11,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-01 18:12:11,506 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:11,506 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:11,506 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:11,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:11,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-12-01 18:12:11,506 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:11,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:11,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:11,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:12:11,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-01 18:12:11,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:11,592 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:11,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 18:12:11,610 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 18:12:11,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:11,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-01 18:12:11,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:11,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-12-01 18:12:11,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-01 18:12:11,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-01 18:12:11,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-01 18:12:11,643 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-12-01 18:12:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:11,741 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-12-01 18:12:11,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-01 18:12:11,742 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-12-01 18:12:11,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:11,742 INFO L225 Difference]: With dead ends: 46 [2018-12-01 18:12:11,742 INFO L226 Difference]: Without dead ends: 42 [2018-12-01 18:12:11,743 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-12-01 18:12:11,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-01 18:12:11,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-12-01 18:12:11,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-01 18:12:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-12-01 18:12:11,745 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-12-01 18:12:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:11,746 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-12-01 18:12:11,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-01 18:12:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-12-01 18:12:11,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-01 18:12:11,746 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:11,746 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:11,746 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:11,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:11,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-12-01 18:12:11,747 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:11,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:11,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:11,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:11,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-01 18:12:11,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:11,833 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:11,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 18:12:11,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-01 18:12:11,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:11,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-01 18:12:11,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:11,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-12-01 18:12:11,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-01 18:12:11,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-01 18:12:11,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-01 18:12:11,888 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-12-01 18:12:11,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:11,985 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-12-01 18:12:11,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-01 18:12:11,985 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-12-01 18:12:11,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:11,986 INFO L225 Difference]: With dead ends: 49 [2018-12-01 18:12:11,986 INFO L226 Difference]: Without dead ends: 45 [2018-12-01 18:12:11,986 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-12-01 18:12:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-01 18:12:11,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-12-01 18:12:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-01 18:12:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-12-01 18:12:11,991 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-12-01 18:12:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:11,991 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-12-01 18:12:11,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-01 18:12:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-12-01 18:12:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-01 18:12:11,992 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:11,992 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:11,993 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:11,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:11,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-12-01 18:12:11,993 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:11,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:11,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:11,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:11,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-01 18:12:12,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:12,093 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:12,099 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 18:12:12,113 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 18:12:12,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:12,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-01 18:12:12,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:12,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-12-01 18:12:12,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-01 18:12:12,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-01 18:12:12,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-01 18:12:12,151 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-12-01 18:12:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:12,283 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-12-01 18:12:12,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-01 18:12:12,284 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-12-01 18:12:12,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:12,284 INFO L225 Difference]: With dead ends: 52 [2018-12-01 18:12:12,285 INFO L226 Difference]: Without dead ends: 48 [2018-12-01 18:12:12,285 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-12-01 18:12:12,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-01 18:12:12,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-12-01 18:12:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-01 18:12:12,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-12-01 18:12:12,288 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-12-01 18:12:12,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:12,288 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-12-01 18:12:12,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-01 18:12:12,288 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-12-01 18:12:12,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-12-01 18:12:12,289 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:12,289 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:12,289 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:12,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:12,289 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-12-01 18:12:12,290 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:12,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:12,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:12,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:12,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-01 18:12:12,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:12,379 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:12,385 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 18:12:12,402 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-12-01 18:12:12,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:12,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-01 18:12:12,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:12,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-12-01 18:12:12,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-01 18:12:12,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-01 18:12:12,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-12-01 18:12:12,434 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-12-01 18:12:12,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:12,534 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-12-01 18:12:12,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-01 18:12:12,535 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-12-01 18:12:12,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:12,535 INFO L225 Difference]: With dead ends: 55 [2018-12-01 18:12:12,535 INFO L226 Difference]: Without dead ends: 51 [2018-12-01 18:12:12,536 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-12-01 18:12:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-12-01 18:12:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-12-01 18:12:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-12-01 18:12:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-12-01 18:12:12,540 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-12-01 18:12:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:12,540 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-12-01 18:12:12,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-01 18:12:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-12-01 18:12:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-12-01 18:12:12,541 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:12,541 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:12,541 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:12,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:12,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-12-01 18:12:12,542 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:12,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:12,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:12,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:12,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-12-01 18:12:12,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:12,638 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:12,646 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 18:12:12,673 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-12-01 18:12:12,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:12,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-12-01 18:12:12,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:12,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-12-01 18:12:12,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-01 18:12:12,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-01 18:12:12,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-12-01 18:12:12,704 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-12-01 18:12:12,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:12,833 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-12-01 18:12:12,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-01 18:12:12,833 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-12-01 18:12:12,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:12,834 INFO L225 Difference]: With dead ends: 58 [2018-12-01 18:12:12,834 INFO L226 Difference]: Without dead ends: 54 [2018-12-01 18:12:12,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-12-01 18:12:12,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-01 18:12:12,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-12-01 18:12:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-01 18:12:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-12-01 18:12:12,838 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-12-01 18:12:12,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:12,838 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-12-01 18:12:12,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-01 18:12:12,838 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-12-01 18:12:12,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-12-01 18:12:12,839 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:12,839 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:12,839 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:12,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:12,839 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-12-01 18:12:12,839 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:12,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:12,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:12,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:12,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-12-01 18:12:12,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:12,958 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:12,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:12:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:12,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-12-01 18:12:13,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:13,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-12-01 18:12:13,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-01 18:12:13,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-01 18:12:13,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-12-01 18:12:13,020 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-12-01 18:12:13,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:13,160 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-12-01 18:12:13,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-01 18:12:13,161 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-12-01 18:12:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:13,162 INFO L225 Difference]: With dead ends: 61 [2018-12-01 18:12:13,162 INFO L226 Difference]: Without dead ends: 57 [2018-12-01 18:12:13,162 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-12-01 18:12:13,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-01 18:12:13,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-12-01 18:12:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-01 18:12:13,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-12-01 18:12:13,165 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-12-01 18:12:13,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:13,165 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-12-01 18:12:13,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-01 18:12:13,165 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-12-01 18:12:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-01 18:12:13,166 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:13,166 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:13,166 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:13,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:13,167 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-12-01 18:12:13,167 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:13,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:13,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:13,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:12:13,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-12-01 18:12:13,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:13,273 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:13,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 18:12:13,292 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 18:12:13,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:13,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-12-01 18:12:13,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:13,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-12-01 18:12:13,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-01 18:12:13,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-01 18:12:13,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-12-01 18:12:13,325 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-12-01 18:12:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:13,471 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-12-01 18:12:13,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-01 18:12:13,471 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-12-01 18:12:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:13,472 INFO L225 Difference]: With dead ends: 64 [2018-12-01 18:12:13,472 INFO L226 Difference]: Without dead ends: 60 [2018-12-01 18:12:13,472 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-12-01 18:12:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-01 18:12:13,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-12-01 18:12:13,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-01 18:12:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-12-01 18:12:13,476 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-12-01 18:12:13,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:13,477 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-12-01 18:12:13,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-01 18:12:13,477 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-12-01 18:12:13,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-12-01 18:12:13,478 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:13,478 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:13,478 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:13,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:13,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-12-01 18:12:13,479 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:13,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:13,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:13,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:13,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-12-01 18:12:13,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:13,595 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:13,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 18:12:13,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-12-01 18:12:13,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:13,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-12-01 18:12:13,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:13,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-12-01 18:12:13,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-01 18:12:13,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-01 18:12:13,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-12-01 18:12:13,664 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2018-12-01 18:12:13,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:13,818 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-12-01 18:12:13,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-01 18:12:13,818 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2018-12-01 18:12:13,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:13,818 INFO L225 Difference]: With dead ends: 67 [2018-12-01 18:12:13,818 INFO L226 Difference]: Without dead ends: 63 [2018-12-01 18:12:13,819 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-12-01 18:12:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-01 18:12:13,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-12-01 18:12:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-01 18:12:13,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-12-01 18:12:13,821 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-12-01 18:12:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:13,821 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-12-01 18:12:13,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-01 18:12:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-12-01 18:12:13,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-12-01 18:12:13,822 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:13,822 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:13,822 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:13,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:13,822 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2018-12-01 18:12:13,822 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:13,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:13,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:13,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:13,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-12-01 18:12:13,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:13,978 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:13,985 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 18:12:14,004 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 18:12:14,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:14,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-12-01 18:12:14,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:14,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-12-01 18:12:14,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-01 18:12:14,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-01 18:12:14,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-12-01 18:12:14,040 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2018-12-01 18:12:14,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:14,203 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-12-01 18:12:14,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-01 18:12:14,204 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2018-12-01 18:12:14,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:14,204 INFO L225 Difference]: With dead ends: 70 [2018-12-01 18:12:14,204 INFO L226 Difference]: Without dead ends: 66 [2018-12-01 18:12:14,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-12-01 18:12:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-12-01 18:12:14,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-12-01 18:12:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-01 18:12:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-12-01 18:12:14,208 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-12-01 18:12:14,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:14,208 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-12-01 18:12:14,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-01 18:12:14,209 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-12-01 18:12:14,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-12-01 18:12:14,209 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:14,209 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:14,209 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:14,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:14,210 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2018-12-01 18:12:14,210 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:14,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:14,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:14,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:14,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-12-01 18:12:14,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:14,394 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:14,399 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 18:12:14,425 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-12-01 18:12:14,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:14,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-12-01 18:12:14,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:14,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-12-01 18:12:14,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-01 18:12:14,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-01 18:12:14,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-12-01 18:12:14,463 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2018-12-01 18:12:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:14,640 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-12-01 18:12:14,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-01 18:12:14,640 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2018-12-01 18:12:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:14,641 INFO L225 Difference]: With dead ends: 73 [2018-12-01 18:12:14,641 INFO L226 Difference]: Without dead ends: 69 [2018-12-01 18:12:14,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-12-01 18:12:14,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-12-01 18:12:14,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-12-01 18:12:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-01 18:12:14,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-12-01 18:12:14,645 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-12-01 18:12:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:14,645 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-12-01 18:12:14,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-01 18:12:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-12-01 18:12:14,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-12-01 18:12:14,646 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:14,646 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:14,646 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:14,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:14,646 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2018-12-01 18:12:14,647 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:14,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:14,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:14,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:14,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-12-01 18:12:14,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:14,791 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:14,797 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 18:12:14,822 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-12-01 18:12:14,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:14,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-12-01 18:12:14,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:14,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-12-01 18:12:14,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-01 18:12:14,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-01 18:12:14,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-12-01 18:12:14,855 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2018-12-01 18:12:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:15,047 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-12-01 18:12:15,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-01 18:12:15,048 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-12-01 18:12:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:15,048 INFO L225 Difference]: With dead ends: 76 [2018-12-01 18:12:15,048 INFO L226 Difference]: Without dead ends: 72 [2018-12-01 18:12:15,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-12-01 18:12:15,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-12-01 18:12:15,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-12-01 18:12:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-12-01 18:12:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-12-01 18:12:15,051 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-12-01 18:12:15,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:15,052 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-12-01 18:12:15,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-01 18:12:15,052 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-12-01 18:12:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-12-01 18:12:15,052 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:15,052 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:15,052 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:15,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:15,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2018-12-01 18:12:15,053 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:15,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:15,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:15,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:15,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-12-01 18:12:15,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:15,231 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:15,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:12:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:15,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-12-01 18:12:15,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:15,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-12-01 18:12:15,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-01 18:12:15,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-01 18:12:15,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-12-01 18:12:15,288 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-12-01 18:12:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:15,499 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-12-01 18:12:15,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-01 18:12:15,500 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-12-01 18:12:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:15,500 INFO L225 Difference]: With dead ends: 79 [2018-12-01 18:12:15,500 INFO L226 Difference]: Without dead ends: 75 [2018-12-01 18:12:15,501 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-12-01 18:12:15,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-12-01 18:12:15,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-12-01 18:12:15,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-12-01 18:12:15,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-12-01 18:12:15,503 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-12-01 18:12:15,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:15,503 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-12-01 18:12:15,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-01 18:12:15,503 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-12-01 18:12:15,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-12-01 18:12:15,503 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:15,503 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:15,504 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:15,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:15,504 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2018-12-01 18:12:15,504 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:15,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:15,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:15,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:12:15,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-12-01 18:12:16,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:12:16,118 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/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 [2018-12-01 18:12:16,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 18:12:16,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 18:12:16,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:12:16,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:12:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-12-01 18:12:16,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:12:16,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-12-01 18:12:16,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-12-01 18:12:16,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-12-01 18:12:16,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-12-01 18:12:16,220 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2018-12-01 18:12:16,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:16,633 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-12-01 18:12:16,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-01 18:12:16,633 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2018-12-01 18:12:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:16,634 INFO L225 Difference]: With dead ends: 82 [2018-12-01 18:12:16,634 INFO L226 Difference]: Without dead ends: 78 [2018-12-01 18:12:16,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-12-01 18:12:16,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-01 18:12:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-12-01 18:12:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-01 18:12:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-12-01 18:12:16,636 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-12-01 18:12:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:16,637 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-12-01 18:12:16,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-12-01 18:12:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-12-01 18:12:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-12-01 18:12:16,637 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:12:16,638 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:12:16,638 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:12:16,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:12:16,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2018-12-01 18:12:16,638 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:12:16,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:12:16,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:16,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:12:16,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:12:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:12:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-12-01 18:12:16,831 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 18:12:16,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2018-12-01 18:12:16,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-01 18:12:16,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-01 18:12:16,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-12-01 18:12:16,832 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2018-12-01 18:12:17,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:12:17,022 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2018-12-01 18:12:17,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-01 18:12:17,023 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2018-12-01 18:12:17,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:12:17,023 INFO L225 Difference]: With dead ends: 78 [2018-12-01 18:12:17,023 INFO L226 Difference]: Without dead ends: 0 [2018-12-01 18:12:17,024 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-12-01 18:12:17,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-01 18:12:17,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-01 18:12:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-01 18:12:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-01 18:12:17,025 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2018-12-01 18:12:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:12:17,025 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 18:12:17,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-01 18:12:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-01 18:12:17,025 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-01 18:12:17,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-01 18:12:17,046 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-01 18:12:17,046 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-01 18:12:17,046 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-01 18:12:17,046 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-01 18:12:17,046 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-01 18:12:17,046 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-01 18:12:17,046 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-12-01 18:12:17,046 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2018-12-01 18:12:17,046 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2018-12-01 18:12:17,046 INFO L448 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-12-01 18:12:17,047 INFO L448 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-12-01 18:12:17,047 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= 20 main_~input~0) (<= main_~input~0 20)) [2018-12-01 18:12:17,047 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-12-01 18:12:17,047 INFO L448 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2018-12-01 18:12:17,047 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-12-01 18:12:17,047 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-12-01 18:12:17,047 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-12-01 18:12:17,047 INFO L444 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-12-01 18:12:17,047 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-01 18:12:17,047 INFO L448 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-12-01 18:12:17,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 06:12:17 BoogieIcfgContainer [2018-12-01 18:12:17,049 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 18:12:17,049 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 18:12:17,049 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 18:12:17,049 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 18:12:17,049 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 06:12:10" (3/4) ... [2018-12-01 18:12:17,052 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-01 18:12:17,056 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-01 18:12:17,056 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-01 18:12:17,057 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-12-01 18:12:17,059 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-01 18:12:17,059 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-01 18:12:17,059 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-01 18:12:17,085 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_84c39c39-52e9-4a21-9982-78bca781492d/bin-2019/uautomizer/witness.graphml [2018-12-01 18:12:17,085 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 18:12:17,086 INFO L168 Benchmark]: Toolchain (without parser) took 7344.81 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 304.6 MB). Free memory was 954.9 MB in the beginning and 1.3 GB in the end (delta: -332.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 18:12:17,087 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 18:12:17,087 INFO L168 Benchmark]: CACSL2BoogieTranslator took 114.54 ms. Allocated memory is still 1.0 GB. Free memory was 954.9 MB in the beginning and 944.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-01 18:12:17,087 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.58 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 18:12:17,087 INFO L168 Benchmark]: Boogie Preprocessor took 10.31 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 18:12:17,087 INFO L168 Benchmark]: RCFGBuilder took 139.66 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 81.8 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -115.8 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-01 18:12:17,087 INFO L168 Benchmark]: TraceAbstraction took 7029.35 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 222.8 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -228.4 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 18:12:17,088 INFO L168 Benchmark]: Witness Printer took 36.46 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 671.1 kB). Peak memory consumption was 671.1 kB. Max. memory is 11.5 GB. [2018-12-01 18:12:17,090 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 114.54 ms. Allocated memory is still 1.0 GB. Free memory was 954.9 MB in the beginning and 944.2 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 11.58 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.31 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 139.66 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 81.8 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -115.8 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7029.35 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 222.8 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -228.4 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 36.46 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 671.1 kB). Peak memory consumption was 671.1 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 6.9s OverallTime, 22 OverallIterations, 22 TraceHistogramMax, 2.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 370 SDtfs, 527 SDslu, 4040 SDs, 0 SdLazy, 2636 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2304 GetRequests, 1753 SyntacticMatches, 2 SemanticMatches, 549 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 3192 NumberOfCodeBlocks, 3192 NumberOfCodeBlocksAsserted, 145 NumberOfCheckSat, 3150 ConstructedInterpolants, 0 QuantifiedInterpolants, 787512 SizeOfPredicates, 229 NumberOfNonLiveVariables, 3560 ConjunctsInSsa, 543 ConjunctsInUnsatCore, 42 InterpolantComputations, 2 PerfectInterpolantSequences, 10164/18984 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...