./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i20_o20_false-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_6749af00-1060-4624-8839-53780aa59eb6/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i20_o20_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 7d05936c4bb1bb97a4b24ebc11d02c0e844c743b ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-01 18:54:21,429 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 18:54:21,430 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 18:54:21,436 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 18:54:21,436 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 18:54:21,437 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 18:54:21,437 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 18:54:21,438 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 18:54:21,439 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 18:54:21,439 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 18:54:21,440 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 18:54:21,440 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 18:54:21,440 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 18:54:21,441 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 18:54:21,441 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 18:54:21,442 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 18:54:21,442 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 18:54:21,443 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 18:54:21,444 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 18:54:21,445 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 18:54:21,445 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 18:54:21,446 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 18:54:21,447 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 18:54:21,447 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 18:54:21,447 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 18:54:21,447 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 18:54:21,448 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 18:54:21,448 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 18:54:21,449 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 18:54:21,449 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 18:54:21,449 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 18:54:21,450 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 18:54:21,450 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 18:54:21,450 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 18:54:21,451 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 18:54:21,451 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 18:54:21,451 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-01 18:54:21,458 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 18:54:21,458 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 18:54:21,459 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 18:54:21,459 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 18:54:21,459 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 18:54:21,459 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 18:54:21,460 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 18:54:21,460 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 18:54:21,460 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 18:54:21,460 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 18:54:21,460 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 18:54:21,460 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 18:54:21,460 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 18:54:21,460 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 18:54:21,461 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 18:54:21,461 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 18:54:21,461 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 18:54:21,461 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 18:54:21,461 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 18:54:21,461 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 18:54:21,461 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 18:54:21,462 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 18:54:21,462 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 18:54:21,462 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 18:54:21,462 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 18:54:21,462 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 18:54:21,462 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 18:54:21,462 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 18:54:21,462 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 18:54:21,463 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 18:54:21,463 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_6749af00-1060-4624-8839-53780aa59eb6/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 -> 7d05936c4bb1bb97a4b24ebc11d02c0e844c743b [2018-12-01 18:54:21,481 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 18:54:21,490 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 18:54:21,493 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 18:54:21,494 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 18:54:21,494 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 18:54:21,495 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i20_o20_false-unreach-call_true-termination.c [2018-12-01 18:54:21,536 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/bin-2019/uautomizer/data/78de4e735/25f7a7e4e2a34ef8aaebc486270eeda6/FLAGfda44d0ef [2018-12-01 18:54:21,943 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 18:54:21,944 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/sv-benchmarks/c/recursive-simple/id_i20_o20_false-unreach-call_true-termination.c [2018-12-01 18:54:21,947 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/bin-2019/uautomizer/data/78de4e735/25f7a7e4e2a34ef8aaebc486270eeda6/FLAGfda44d0ef [2018-12-01 18:54:21,955 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/bin-2019/uautomizer/data/78de4e735/25f7a7e4e2a34ef8aaebc486270eeda6 [2018-12-01 18:54:21,957 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 18:54:21,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 18:54:21,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 18:54:21,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 18:54:21,961 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 18:54:21,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 06:54:21" (1/1) ... [2018-12-01 18:54:21,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf44b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:54:21, skipping insertion in model container [2018-12-01 18:54:21,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 06:54:21" (1/1) ... [2018-12-01 18:54:21,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 18:54:21,975 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 18:54:22,058 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 18:54:22,060 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 18:54:22,068 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 18:54:22,076 INFO L195 MainTranslator]: Completed translation [2018-12-01 18:54:22,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:54:22 WrapperNode [2018-12-01 18:54:22,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 18:54:22,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 18:54:22,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 18:54:22,077 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 18:54:22,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:54:22" (1/1) ... [2018-12-01 18:54:22,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:54:22" (1/1) ... [2018-12-01 18:54:22,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 18:54:22,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 18:54:22,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 18:54:22,089 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 18:54:22,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:54:22" (1/1) ... [2018-12-01 18:54:22,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:54:22" (1/1) ... [2018-12-01 18:54:22,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:54:22" (1/1) ... [2018-12-01 18:54:22,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:54:22" (1/1) ... [2018-12-01 18:54:22,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:54:22" (1/1) ... [2018-12-01 18:54:22,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:54:22" (1/1) ... [2018-12-01 18:54:22,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:54:22" (1/1) ... [2018-12-01 18:54:22,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 18:54:22,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 18:54:22,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 18:54:22,099 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 18:54:22,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:54:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 18:54:22,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 18:54:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 18:54:22,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 18:54:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 18:54:22,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 18:54:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-01 18:54:22,165 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-01 18:54:22,241 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 18:54:22,241 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-01 18:54:22,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 06:54:22 BoogieIcfgContainer [2018-12-01 18:54:22,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 18:54:22,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 18:54:22,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 18:54:22,244 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 18:54:22,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 06:54:21" (1/3) ... [2018-12-01 18:54:22,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45072128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 06:54:22, skipping insertion in model container [2018-12-01 18:54:22,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:54:22" (2/3) ... [2018-12-01 18:54:22,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45072128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 06:54:22, skipping insertion in model container [2018-12-01 18:54:22,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 06:54:22" (3/3) ... [2018-12-01 18:54:22,246 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i20_o20_false-unreach-call_true-termination.c [2018-12-01 18:54:22,251 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 18:54:22,255 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-01 18:54:22,264 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-01 18:54:22,282 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 18:54:22,283 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 18:54:22,283 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 18:54:22,283 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 18:54:22,283 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 18:54:22,283 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 18:54:22,283 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 18:54:22,283 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 18:54:22,283 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 18:54:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-01 18:54:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-01 18:54:22,297 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:22,297 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:54:22,299 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:22,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-12-01 18:54:22,304 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:22,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:22,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:22,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:54:22,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:22,402 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 18:54:22,403 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 18:54:22,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 18:54:22,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 18:54:22,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 18:54:22,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 18:54:22,415 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-12-01 18:54:22,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:22,453 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-12-01 18:54:22,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 18:54:22,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-01 18:54:22,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:22,460 INFO L225 Difference]: With dead ends: 30 [2018-12-01 18:54:22,460 INFO L226 Difference]: Without dead ends: 18 [2018-12-01 18:54:22,462 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 18:54:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-01 18:54:22,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-01 18:54:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-01 18:54:22,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-01 18:54:22,487 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-12-01 18:54:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:22,487 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-01 18:54:22,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 18:54:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-01 18:54:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-01 18:54:22,488 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:22,488 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 18:54:22,489 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:22,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:22,489 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-12-01 18:54:22,489 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:22,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:22,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:22,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:54:22,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:22,533 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 18:54:22,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:22,533 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:22,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:54:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:22,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:22,577 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 18:54:22,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:22,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-01 18:54:22,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 18:54:22,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 18:54:22,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-01 18:54:22,593 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-12-01 18:54:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:22,631 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-12-01 18:54:22,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 18:54:22,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-12-01 18:54:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:22,632 INFO L225 Difference]: With dead ends: 25 [2018-12-01 18:54:22,632 INFO L226 Difference]: Without dead ends: 21 [2018-12-01 18:54:22,632 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 18:54:22,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-01 18:54:22,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-01 18:54:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-01 18:54:22,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-01 18:54:22,635 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-12-01 18:54:22,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:22,635 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-01 18:54:22,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 18:54:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-01 18:54:22,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-01 18:54:22,636 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:22,636 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 18:54:22,636 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:22,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:22,636 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-12-01 18:54:22,636 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:22,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:22,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:22,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:54:22,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:22,678 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 18:54:22,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:22,679 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:22,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 18:54:22,696 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 18:54:22,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:22,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:22,704 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 18:54:22,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:22,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-01 18:54:22,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-01 18:54:22,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-01 18:54:22,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-01 18:54:22,720 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-12-01 18:54:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:22,753 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-12-01 18:54:22,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 18:54:22,754 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-12-01 18:54:22,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:22,754 INFO L225 Difference]: With dead ends: 28 [2018-12-01 18:54:22,754 INFO L226 Difference]: Without dead ends: 24 [2018-12-01 18:54:22,754 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 18:54:22,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-01 18:54:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-01 18:54:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-01 18:54:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-01 18:54:22,757 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-12-01 18:54:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:22,758 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-01 18:54:22,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-01 18:54:22,758 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-01 18:54:22,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-01 18:54:22,758 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:22,758 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 18:54:22,759 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:22,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:22,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-12-01 18:54:22,759 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:22,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:22,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:22,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:22,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:22,829 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 18:54:22,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:22,830 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:22,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 18:54:22,848 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-01 18:54:22,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:22,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:22,856 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 18:54:22,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:22,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-12-01 18:54:22,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-01 18:54:22,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-01 18:54:22,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-01 18:54:22,874 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2018-12-01 18:54:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:22,890 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-12-01 18:54:22,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-01 18:54:22,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-12-01 18:54:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:22,891 INFO L225 Difference]: With dead ends: 31 [2018-12-01 18:54:22,891 INFO L226 Difference]: Without dead ends: 27 [2018-12-01 18:54:22,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-01 18:54:22,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-01 18:54:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-01 18:54:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-01 18:54:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-01 18:54:22,894 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-12-01 18:54:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:22,894 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-01 18:54:22,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-01 18:54:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-01 18:54:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-01 18:54:22,895 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:22,895 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 18:54:22,895 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:22,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:22,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-12-01 18:54:22,895 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:22,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:22,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:22,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:22,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:22,945 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 18:54:22,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:22,945 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:22,951 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 18:54:22,960 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 18:54:22,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:22,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:22,972 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 18:54:22,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:22,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-01 18:54:22,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 18:54:22,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 18:54:22,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-01 18:54:22,987 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-12-01 18:54:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:23,040 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-12-01 18:54:23,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 18:54:23,041 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-12-01 18:54:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:23,042 INFO L225 Difference]: With dead ends: 34 [2018-12-01 18:54:23,042 INFO L226 Difference]: Without dead ends: 30 [2018-12-01 18:54:23,042 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 18:54:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-01 18:54:23,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-01 18:54:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-01 18:54:23,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-12-01 18:54:23,047 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-12-01 18:54:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:23,048 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-12-01 18:54:23,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 18:54:23,048 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-12-01 18:54:23,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-01 18:54:23,049 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:23,049 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 18:54:23,049 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:23,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:23,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-12-01 18:54:23,050 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:23,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:23,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:23,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:23,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:23,147 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 18:54:23,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:23,147 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:23,153 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 18:54:23,168 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-01 18:54:23,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:23,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:23,178 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 18:54:23,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:23,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-12-01 18:54:23,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-01 18:54:23,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-01 18:54:23,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-12-01 18:54:23,193 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-12-01 18:54:23,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:23,220 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-12-01 18:54:23,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-01 18:54:23,221 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-12-01 18:54:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:23,222 INFO L225 Difference]: With dead ends: 37 [2018-12-01 18:54:23,222 INFO L226 Difference]: Without dead ends: 33 [2018-12-01 18:54:23,222 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-12-01 18:54:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-01 18:54:23,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-01 18:54:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-01 18:54:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-12-01 18:54:23,227 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-12-01 18:54:23,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:23,227 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-12-01 18:54:23,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-01 18:54:23,228 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-12-01 18:54:23,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-01 18:54:23,229 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:23,229 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 18:54:23,229 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:23,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:23,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-12-01 18:54:23,229 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:23,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:23,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:23,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:23,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:23,339 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 18:54:23,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:23,340 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:23,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 18:54:23,358 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-01 18:54:23,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:23,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:23,462 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 18:54:23,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:23,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2018-12-01 18:54:23,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-01 18:54:23,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-01 18:54:23,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2018-12-01 18:54:23,477 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 26 states. [2018-12-01 18:54:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:23,706 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-12-01 18:54:23,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-01 18:54:23,707 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2018-12-01 18:54:23,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:23,707 INFO L225 Difference]: With dead ends: 40 [2018-12-01 18:54:23,708 INFO L226 Difference]: Without dead ends: 36 [2018-12-01 18:54:23,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2018-12-01 18:54:23,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-01 18:54:23,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-12-01 18:54:23,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-01 18:54:23,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-12-01 18:54:23,711 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-12-01 18:54:23,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:23,712 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-12-01 18:54:23,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-01 18:54:23,712 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-12-01 18:54:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-01 18:54:23,712 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:23,712 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 18:54:23,713 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:23,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:23,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-12-01 18:54:23,713 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:23,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:23,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:23,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:23,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:23,824 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 18:54:23,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:23,824 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:23,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:54:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:23,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:23,944 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 18:54:23,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:23,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2018-12-01 18:54:23,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-01 18:54:23,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-01 18:54:23,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2018-12-01 18:54:23,958 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 29 states. [2018-12-01 18:54:24,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:24,184 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-12-01 18:54:24,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-01 18:54:24,185 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 55 [2018-12-01 18:54:24,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:24,185 INFO L225 Difference]: With dead ends: 43 [2018-12-01 18:54:24,185 INFO L226 Difference]: Without dead ends: 39 [2018-12-01 18:54:24,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=1538, Unknown=0, NotChecked=0, Total=1892 [2018-12-01 18:54:24,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-01 18:54:24,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-01 18:54:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-01 18:54:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-12-01 18:54:24,191 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-12-01 18:54:24,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:24,191 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-12-01 18:54:24,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-01 18:54:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-12-01 18:54:24,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-01 18:54:24,192 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:24,192 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 18:54:24,193 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:24,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:24,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-12-01 18:54:24,193 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:24,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:24,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:24,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:54:24,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:24,282 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 18:54:24,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:24,282 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:24,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 18:54:24,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 18:54:24,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:24,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:24,310 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 18:54:24,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:24,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-12-01 18:54:24,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-01 18:54:24,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-01 18:54:24,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-01 18:54:24,325 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-12-01 18:54:24,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:24,392 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-12-01 18:54:24,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-01 18:54:24,393 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-12-01 18:54:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:24,394 INFO L225 Difference]: With dead ends: 46 [2018-12-01 18:54:24,394 INFO L226 Difference]: Without dead ends: 42 [2018-12-01 18:54:24,394 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 18:54:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-01 18:54:24,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-12-01 18:54:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-01 18:54:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-12-01 18:54:24,399 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-12-01 18:54:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:24,399 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-12-01 18:54:24,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-01 18:54:24,399 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-12-01 18:54:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-01 18:54:24,400 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:24,400 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 18:54:24,400 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:24,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:24,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-12-01 18:54:24,401 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:24,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:24,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:24,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:24,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:24,479 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 18:54:24,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:24,479 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:24,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 18:54:24,513 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-01 18:54:24,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:24,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:24,746 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 18:54:24,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:24,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2018-12-01 18:54:24,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-01 18:54:24,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-01 18:54:24,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2018-12-01 18:54:24,761 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2018-12-01 18:54:25,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:25,063 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-12-01 18:54:25,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-01 18:54:25,064 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2018-12-01 18:54:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:25,065 INFO L225 Difference]: With dead ends: 49 [2018-12-01 18:54:25,065 INFO L226 Difference]: Without dead ends: 45 [2018-12-01 18:54:25,066 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2018-12-01 18:54:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-01 18:54:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-12-01 18:54:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-01 18:54:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-12-01 18:54:25,070 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-12-01 18:54:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:25,071 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-12-01 18:54:25,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-01 18:54:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-12-01 18:54:25,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-01 18:54:25,072 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:25,072 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 18:54:25,072 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:25,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:25,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-12-01 18:54:25,073 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:25,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:25,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:25,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:25,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:25,169 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 18:54:25,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:25,170 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:25,178 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 18:54:25,189 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 18:54:25,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:25,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:25,202 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 18:54:25,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:25,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-12-01 18:54:25,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-01 18:54:25,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-01 18:54:25,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-01 18:54:25,218 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-12-01 18:54:25,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:25,318 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-12-01 18:54:25,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-01 18:54:25,318 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-12-01 18:54:25,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:25,319 INFO L225 Difference]: With dead ends: 52 [2018-12-01 18:54:25,319 INFO L226 Difference]: Without dead ends: 48 [2018-12-01 18:54:25,319 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 18:54:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-01 18:54:25,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-12-01 18:54:25,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-01 18:54:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-12-01 18:54:25,322 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-12-01 18:54:25,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:25,323 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-12-01 18:54:25,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-01 18:54:25,323 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-12-01 18:54:25,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-12-01 18:54:25,323 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:25,323 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 18:54:25,323 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:25,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:25,324 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-12-01 18:54:25,324 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:25,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:25,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:25,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:25,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:25,423 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 18:54:25,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:25,424 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:25,429 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 18:54:25,449 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-12-01 18:54:25,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:25,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:25,469 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 18:54:25,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:25,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-12-01 18:54:25,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-01 18:54:25,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-01 18:54:25,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-12-01 18:54:25,485 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-12-01 18:54:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:25,614 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-12-01 18:54:25,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-01 18:54:25,614 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-12-01 18:54:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:25,615 INFO L225 Difference]: With dead ends: 55 [2018-12-01 18:54:25,615 INFO L226 Difference]: Without dead ends: 51 [2018-12-01 18:54:25,616 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 18:54:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-12-01 18:54:25,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-12-01 18:54:25,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-12-01 18:54:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-12-01 18:54:25,620 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-12-01 18:54:25,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:25,620 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-12-01 18:54:25,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-01 18:54:25,620 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-12-01 18:54:25,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-12-01 18:54:25,621 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:25,621 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 18:54:25,621 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:25,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:25,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-12-01 18:54:25,622 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:25,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:25,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:25,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:25,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:25,798 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 18:54:25,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:25,799 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:25,804 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 18:54:25,822 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-12-01 18:54:25,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:25,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:25,833 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 18:54:25,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:25,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-12-01 18:54:25,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-01 18:54:25,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-01 18:54:25,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2018-12-01 18:54:25,849 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2018-12-01 18:54:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:25,885 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-12-01 18:54:25,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-01 18:54:25,885 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-12-01 18:54:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:25,886 INFO L225 Difference]: With dead ends: 58 [2018-12-01 18:54:25,886 INFO L226 Difference]: Without dead ends: 54 [2018-12-01 18:54:25,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2018-12-01 18:54:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-01 18:54:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-12-01 18:54:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-01 18:54:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-12-01 18:54:25,889 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-12-01 18:54:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:25,889 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-12-01 18:54:25,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-01 18:54:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-12-01 18:54:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-12-01 18:54:25,890 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:25,890 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 18:54:25,890 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:25,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:25,890 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-12-01 18:54:25,890 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:25,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:25,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:25,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:25,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:26,083 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 18:54:26,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:26,083 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:26,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:54:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:26,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:26,318 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 18:54:26,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:26,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2018-12-01 18:54:26,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-12-01 18:54:26,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-12-01 18:54:26,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1811, Unknown=0, NotChecked=0, Total=2162 [2018-12-01 18:54:26,334 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 47 states. [2018-12-01 18:54:26,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:26,757 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-12-01 18:54:26,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-01 18:54:26,758 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 91 [2018-12-01 18:54:26,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:26,758 INFO L225 Difference]: With dead ends: 61 [2018-12-01 18:54:26,758 INFO L226 Difference]: Without dead ends: 57 [2018-12-01 18:54:26,759 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=993, Invalid=4409, Unknown=0, NotChecked=0, Total=5402 [2018-12-01 18:54:26,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-01 18:54:26,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-12-01 18:54:26,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-01 18:54:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-12-01 18:54:26,762 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-12-01 18:54:26,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:26,762 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-12-01 18:54:26,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-12-01 18:54:26,762 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-12-01 18:54:26,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-01 18:54:26,763 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:26,763 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 18:54:26,763 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:26,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:26,763 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-12-01 18:54:26,763 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:26,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:26,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:26,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:54:26,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:26,965 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 18:54:26,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:26,966 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:26,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 18:54:26,986 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 18:54:26,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:26,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:27,220 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 18:54:27,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:27,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19] total 50 [2018-12-01 18:54:27,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-12-01 18:54:27,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-12-01 18:54:27,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=2052, Unknown=0, NotChecked=0, Total=2450 [2018-12-01 18:54:27,236 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 50 states. [2018-12-01 18:54:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:27,701 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-12-01 18:54:27,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-01 18:54:27,701 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 97 [2018-12-01 18:54:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:27,702 INFO L225 Difference]: With dead ends: 64 [2018-12-01 18:54:27,702 INFO L226 Difference]: Without dead ends: 60 [2018-12-01 18:54:27,703 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1131, Invalid=5031, Unknown=0, NotChecked=0, Total=6162 [2018-12-01 18:54:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-01 18:54:27,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-12-01 18:54:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-01 18:54:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-12-01 18:54:27,706 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-12-01 18:54:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:27,706 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-12-01 18:54:27,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-12-01 18:54:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-12-01 18:54:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-12-01 18:54:27,707 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:27,707 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 18:54:27,707 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:27,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:27,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-12-01 18:54:27,708 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:27,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:27,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:27,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:27,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:27,929 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 18:54:27,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:27,929 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:27,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 18:54:27,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-12-01 18:54:27,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:27,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:28,226 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 18:54:28,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:28,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 20] total 53 [2018-12-01 18:54:28,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-12-01 18:54:28,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-12-01 18:54:28,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2308, Unknown=0, NotChecked=0, Total=2756 [2018-12-01 18:54:28,242 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 53 states. [2018-12-01 18:54:28,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:28,761 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-12-01 18:54:28,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-01 18:54:28,762 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 103 [2018-12-01 18:54:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:28,762 INFO L225 Difference]: With dead ends: 67 [2018-12-01 18:54:28,762 INFO L226 Difference]: Without dead ends: 63 [2018-12-01 18:54:28,763 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1278, Invalid=5694, Unknown=0, NotChecked=0, Total=6972 [2018-12-01 18:54:28,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-01 18:54:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-12-01 18:54:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-01 18:54:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-12-01 18:54:28,766 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-12-01 18:54:28,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:28,766 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-12-01 18:54:28,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-12-01 18:54:28,766 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-12-01 18:54:28,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-12-01 18:54:28,766 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:28,767 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 18:54:28,767 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:28,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:28,767 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2018-12-01 18:54:28,767 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:28,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:28,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:28,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:28,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:29,028 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 18:54:29,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:29,028 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:29,034 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 18:54:29,051 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 18:54:29,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:29,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:29,345 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 18:54:29,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:29,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21] total 56 [2018-12-01 18:54:29,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-01 18:54:29,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-01 18:54:29,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2579, Unknown=0, NotChecked=0, Total=3080 [2018-12-01 18:54:29,361 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 56 states. [2018-12-01 18:54:29,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:29,939 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-12-01 18:54:29,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-01 18:54:29,940 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 109 [2018-12-01 18:54:29,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:29,941 INFO L225 Difference]: With dead ends: 70 [2018-12-01 18:54:29,941 INFO L226 Difference]: Without dead ends: 66 [2018-12-01 18:54:29,942 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1434, Invalid=6398, Unknown=0, NotChecked=0, Total=7832 [2018-12-01 18:54:29,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-12-01 18:54:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-12-01 18:54:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-01 18:54:29,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-12-01 18:54:29,945 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-12-01 18:54:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:29,945 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-12-01 18:54:29,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-01 18:54:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-12-01 18:54:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-12-01 18:54:29,946 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:29,946 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 18:54:29,946 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:29,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:29,947 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2018-12-01 18:54:29,947 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:29,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:29,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:29,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:29,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:30,076 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 18:54:30,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:30,076 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:30,084 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 18:54:30,118 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-12-01 18:54:30,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:30,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:30,597 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 18:54:30,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:30,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2018-12-01 18:54:30,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-12-01 18:54:30,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-12-01 18:54:30,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=2865, Unknown=0, NotChecked=0, Total=3422 [2018-12-01 18:54:30,613 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 59 states. [2018-12-01 18:54:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:31,233 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-12-01 18:54:31,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-01 18:54:31,233 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 115 [2018-12-01 18:54:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:31,234 INFO L225 Difference]: With dead ends: 73 [2018-12-01 18:54:31,234 INFO L226 Difference]: Without dead ends: 69 [2018-12-01 18:54:31,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1562 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1599, Invalid=7143, Unknown=0, NotChecked=0, Total=8742 [2018-12-01 18:54:31,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-12-01 18:54:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-12-01 18:54:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-01 18:54:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-12-01 18:54:31,239 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-12-01 18:54:31,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:31,239 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-12-01 18:54:31,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-12-01 18:54:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-12-01 18:54:31,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-12-01 18:54:31,240 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:31,240 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 18:54:31,240 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:31,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:31,240 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2018-12-01 18:54:31,240 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:31,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:31,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:31,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:31,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:31,403 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 18:54:31,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:31,403 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:31,409 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 18:54:31,434 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-12-01 18:54:31,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:54:31,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:31,930 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 18:54:31,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:31,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2018-12-01 18:54:31,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-12-01 18:54:31,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-12-01 18:54:31,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2018-12-01 18:54:31,946 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 62 states. [2018-12-01 18:54:32,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:32,636 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-12-01 18:54:32,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-01 18:54:32,636 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 121 [2018-12-01 18:54:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:32,636 INFO L225 Difference]: With dead ends: 76 [2018-12-01 18:54:32,636 INFO L226 Difference]: Without dead ends: 72 [2018-12-01 18:54:32,637 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2018-12-01 18:54:32,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-12-01 18:54:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-12-01 18:54:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-12-01 18:54:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-12-01 18:54:32,639 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-12-01 18:54:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:32,640 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-12-01 18:54:32,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-12-01 18:54:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-12-01 18:54:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-12-01 18:54:32,640 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:32,640 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 18:54:32,640 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:32,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:32,640 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2018-12-01 18:54:32,640 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:32,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:32,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:32,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:54:32,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:32,788 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 18:54:32,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:54:32,788 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/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 18:54:32,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:54:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:54:32,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:54:32,831 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 18:54:32,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:54:32,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-12-01 18:54:32,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-01 18:54:32,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-01 18:54:32,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-12-01 18:54:32,847 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-12-01 18:54:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:54:33,040 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-12-01 18:54:33,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-01 18:54:33,040 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-12-01 18:54:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:54:33,041 INFO L225 Difference]: With dead ends: 79 [2018-12-01 18:54:33,041 INFO L226 Difference]: Without dead ends: 75 [2018-12-01 18:54:33,041 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-12-01 18:54:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-12-01 18:54:33,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-12-01 18:54:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-12-01 18:54:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-12-01 18:54:33,043 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-12-01 18:54:33,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:54:33,043 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-12-01 18:54:33,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-01 18:54:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-12-01 18:54:33,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-12-01 18:54:33,044 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:54:33,044 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 18:54:33,044 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:54:33,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:54:33,044 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2018-12-01 18:54:33,044 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:54:33,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:54:33,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:33,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:54:33,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:54:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 18:54:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 18:54:33,073 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-01 18:54:33,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 06:54:33 BoogieIcfgContainer [2018-12-01 18:54:33,098 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 18:54:33,099 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 18:54:33,099 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 18:54:33,099 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 18:54:33,099 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 06:54:22" (3/4) ... [2018-12-01 18:54:33,101 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-01 18:54:33,138 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6749af00-1060-4624-8839-53780aa59eb6/bin-2019/uautomizer/witness.graphml [2018-12-01 18:54:33,138 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 18:54:33,139 INFO L168 Benchmark]: Toolchain (without parser) took 11181.46 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 421.0 MB). Free memory was 957.1 MB in the beginning and 1.1 GB in the end (delta: -106.7 MB). Peak memory consumption was 314.3 MB. Max. memory is 11.5 GB. [2018-12-01 18:54:33,140 INFO L168 Benchmark]: CDTParser took 0.14 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 18:54:33,140 INFO L168 Benchmark]: CACSL2BoogieTranslator took 117.93 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-01 18:54:33,140 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.83 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 18:54:33,140 INFO L168 Benchmark]: Boogie Preprocessor took 9.69 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 18:54:33,140 INFO L168 Benchmark]: RCFGBuilder took 142.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -182.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2018-12-01 18:54:33,141 INFO L168 Benchmark]: TraceAbstraction took 10856.78 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 272.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 64.7 MB). Peak memory consumption was 337.3 MB. Max. memory is 11.5 GB. [2018-12-01 18:54:33,141 INFO L168 Benchmark]: Witness Printer took 39.65 ms. Allocated memory is still 1.5 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 18:54:33,142 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 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 117.93 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 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 11.83 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.69 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 142.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -182.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10856.78 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 272.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 64.7 MB). Peak memory consumption was 337.3 MB. Max. memory is 11.5 GB. * Witness Printer took 39.65 ms. Allocated memory is still 1.5 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 20; VAL [input=20] [L11] CALL, EXPR id(input) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=20, input=20] [L11] int result = id(input); [L12] COND TRUE result == 20 VAL [input=20, result=20] [L13] __VERIFIER_error() VAL [input=20, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 10.8s OverallTime, 21 OverallIterations, 21 TraceHistogramMax, 4.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 261 SDtfs, 347 SDslu, 3966 SDs, 0 SdLazy, 2237 SolverSat, 160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2150 GetRequests, 1321 SyntacticMatches, 0 SemanticMatches, 829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9629 ImplicationChecksByTransitivity, 7.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, 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, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 2920 NumberOfCodeBlocks, 2920 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2748 ConstructedInterpolants, 0 QuantifiedInterpolants, 547176 SizeOfPredicates, 158 NumberOfNonLiveVariables, 3268 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...