./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-lit/gj2007_true-unreach-call.c.i.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007_true-unreach-call.c.i.p+lhb-reducer.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/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 17da727b994aaa75d870178ca09f053b93a70f18 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 07:39:40,928 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 07:39:40,930 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 07:39:40,940 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 07:39:40,941 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 07:39:40,941 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 07:39:40,942 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 07:39:40,944 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 07:39:40,946 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 07:39:40,947 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 07:39:40,948 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 07:39:40,948 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 07:39:40,949 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 07:39:40,950 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 07:39:40,951 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 07:39:40,953 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 07:39:40,954 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 07:39:40,955 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 07:39:40,957 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 07:39:40,959 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 07:39:40,960 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 07:39:40,961 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 07:39:40,963 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 07:39:40,963 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 07:39:40,963 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 07:39:40,965 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 07:39:40,966 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 07:39:40,967 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 07:39:40,967 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 07:39:40,969 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 07:39:40,969 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 07:39:40,970 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 07:39:40,970 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 07:39:40,970 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 07:39:40,971 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 07:39:40,972 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 07:39:40,972 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 07:39:40,986 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 07:39:40,986 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 07:39:40,987 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 07:39:40,987 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 07:39:40,988 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 07:39:40,988 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 07:39:40,988 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 07:39:40,988 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 07:39:40,989 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 07:39:40,989 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 07:39:40,989 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 07:39:40,989 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 07:39:40,989 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 07:39:40,989 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 07:39:40,990 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 07:39:40,990 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 07:39:40,990 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 07:39:40,990 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 07:39:40,990 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 07:39:40,991 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 07:39:40,991 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 07:39:40,991 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 07:39:40,991 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 07:39:40,991 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 07:39:40,992 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 07:39:40,992 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 07:39:40,992 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 07:39:40,992 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 07:39:40,992 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 07:39:40,992 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_f713ff16-2c32-4766-a9b8-f7dfafc536e7/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 -> 17da727b994aaa75d870178ca09f053b93a70f18 [2018-11-10 07:39:41,017 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 07:39:41,028 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 07:39:41,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 07:39:41,032 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 07:39:41,032 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 07:39:41,033 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/../../sv-benchmarks/c/loop-lit/gj2007_true-unreach-call.c.i.p+lhb-reducer.c [2018-11-10 07:39:41,078 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/data/8ccb564d3/1a462ab422ce40919d2229149c1e8ab6/FLAG2a0bd2d85 [2018-11-10 07:39:41,404 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 07:39:41,405 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/sv-benchmarks/c/loop-lit/gj2007_true-unreach-call.c.i.p+lhb-reducer.c [2018-11-10 07:39:41,412 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/data/8ccb564d3/1a462ab422ce40919d2229149c1e8ab6/FLAG2a0bd2d85 [2018-11-10 07:39:41,423 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/data/8ccb564d3/1a462ab422ce40919d2229149c1e8ab6 [2018-11-10 07:39:41,426 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 07:39:41,427 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 07:39:41,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 07:39:41,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 07:39:41,431 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 07:39:41,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:39:41" (1/1) ... [2018-11-10 07:39:41,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d89bcad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:39:41, skipping insertion in model container [2018-11-10 07:39:41,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:39:41" (1/1) ... [2018-11-10 07:39:41,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 07:39:41,458 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 07:39:41,565 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:39:41,568 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 07:39:41,586 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:39:41,596 INFO L193 MainTranslator]: Completed translation [2018-11-10 07:39:41,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:39:41 WrapperNode [2018-11-10 07:39:41,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 07:39:41,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 07:39:41,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 07:39:41,597 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 07:39:41,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:39:41" (1/1) ... [2018-11-10 07:39:41,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:39:41" (1/1) ... [2018-11-10 07:39:41,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:39:41" (1/1) ... [2018-11-10 07:39:41,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:39:41" (1/1) ... [2018-11-10 07:39:41,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:39:41" (1/1) ... [2018-11-10 07:39:41,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:39:41" (1/1) ... [2018-11-10 07:39:41,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:39:41" (1/1) ... [2018-11-10 07:39:41,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 07:39:41,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 07:39:41,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 07:39:41,616 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 07:39:41,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:39:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 07:39:41,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 07:39:41,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 07:39:41,695 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 07:39:41,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 07:39:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-11-10 07:39:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 07:39:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-10 07:39:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 07:39:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 07:39:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 07:39:41,850 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 07:39:41,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:39:41 BoogieIcfgContainer [2018-11-10 07:39:41,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 07:39:41,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 07:39:41,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 07:39:41,853 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 07:39:41,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 07:39:41" (1/3) ... [2018-11-10 07:39:41,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7880389c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 07:39:41, skipping insertion in model container [2018-11-10 07:39:41,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:39:41" (2/3) ... [2018-11-10 07:39:41,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7880389c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 07:39:41, skipping insertion in model container [2018-11-10 07:39:41,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:39:41" (3/3) ... [2018-11-10 07:39:41,856 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007_true-unreach-call.c.i.p+lhb-reducer.c [2018-11-10 07:39:41,863 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 07:39:41,869 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 07:39:41,880 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 07:39:41,901 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 07:39:41,902 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 07:39:41,902 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 07:39:41,902 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 07:39:41,902 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 07:39:41,902 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 07:39:41,902 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 07:39:41,902 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 07:39:41,902 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 07:39:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-10 07:39:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 07:39:41,926 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:41,927 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:41,929 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:41,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash -535062244, now seen corresponding path program 1 times [2018-11-10 07:39:41,938 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:41,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:41,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:41,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:41,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:39:42,079 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:39:42,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 07:39:42,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 07:39:42,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 07:39:42,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 07:39:42,094 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2018-11-10 07:39:42,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:42,293 INFO L93 Difference]: Finished difference Result 74 states and 128 transitions. [2018-11-10 07:39:42,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 07:39:42,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2018-11-10 07:39:42,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:42,302 INFO L225 Difference]: With dead ends: 74 [2018-11-10 07:39:42,302 INFO L226 Difference]: Without dead ends: 47 [2018-11-10 07:39:42,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 07:39:42,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-10 07:39:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-11-10 07:39:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-10 07:39:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2018-11-10 07:39:42,337 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 27 [2018-11-10 07:39:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:42,337 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2018-11-10 07:39:42,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 07:39:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2018-11-10 07:39:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 07:39:42,338 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:42,338 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:42,338 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:42,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:42,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1447563500, now seen corresponding path program 1 times [2018-11-10 07:39:42,339 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:42,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:42,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:42,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:42,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:39:42,385 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:39:42,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 07:39:42,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 07:39:42,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 07:39:42,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 07:39:42,387 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 5 states. [2018-11-10 07:39:42,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:42,469 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2018-11-10 07:39:42,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 07:39:42,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-11-10 07:39:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:42,470 INFO L225 Difference]: With dead ends: 62 [2018-11-10 07:39:42,470 INFO L226 Difference]: Without dead ends: 41 [2018-11-10 07:39:42,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 07:39:42,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-10 07:39:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-11-10 07:39:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-10 07:39:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2018-11-10 07:39:42,477 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 27 [2018-11-10 07:39:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:42,478 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2018-11-10 07:39:42,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 07:39:42,478 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2018-11-10 07:39:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 07:39:42,479 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:42,479 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:42,479 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:42,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:42,479 INFO L82 PathProgramCache]: Analyzing trace with hash -646102720, now seen corresponding path program 1 times [2018-11-10 07:39:42,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:42,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:42,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:42,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:42,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:39:42,542 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:39:42,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-10 07:39:42,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 07:39:42,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 07:39:42,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-10 07:39:42,543 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 7 states. [2018-11-10 07:39:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:42,640 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2018-11-10 07:39:42,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 07:39:42,640 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-10 07:39:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:42,641 INFO L225 Difference]: With dead ends: 52 [2018-11-10 07:39:42,641 INFO L226 Difference]: Without dead ends: 37 [2018-11-10 07:39:42,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-10 07:39:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-10 07:39:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-11-10 07:39:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-10 07:39:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2018-11-10 07:39:42,647 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2018-11-10 07:39:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:42,648 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2018-11-10 07:39:42,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 07:39:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2018-11-10 07:39:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 07:39:42,649 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:42,649 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:42,649 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:42,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:42,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2117052275, now seen corresponding path program 1 times [2018-11-10 07:39:42,649 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:42,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:42,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:42,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:42,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:39:42,747 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:39:42,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-11-10 07:39:42,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 07:39:42,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 07:39:42,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-10 07:39:42,748 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 10 states. [2018-11-10 07:39:42,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:42,801 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2018-11-10 07:39:42,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 07:39:42,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2018-11-10 07:39:42,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:42,802 INFO L225 Difference]: With dead ends: 42 [2018-11-10 07:39:42,802 INFO L226 Difference]: Without dead ends: 31 [2018-11-10 07:39:42,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-10 07:39:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-10 07:39:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-10 07:39:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-10 07:39:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2018-11-10 07:39:42,805 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 27 [2018-11-10 07:39:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:42,806 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2018-11-10 07:39:42,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 07:39:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2018-11-10 07:39:42,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 07:39:42,806 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:42,806 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:42,806 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:42,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:42,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1286240867, now seen corresponding path program 1 times [2018-11-10 07:39:42,807 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:42,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:42,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:42,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:42,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:39:42,846 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:39:42,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 07:39:42,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 07:39:42,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 07:39:42,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 07:39:42,847 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 3 states. [2018-11-10 07:39:42,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:42,913 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-11-10 07:39:42,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 07:39:42,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2018-11-10 07:39:42,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:42,914 INFO L225 Difference]: With dead ends: 34 [2018-11-10 07:39:42,914 INFO L226 Difference]: Without dead ends: 31 [2018-11-10 07:39:42,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 07:39:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-10 07:39:42,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-10 07:39:42,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-10 07:39:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-11-10 07:39:42,920 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-11-10 07:39:42,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:42,920 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-11-10 07:39:42,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 07:39:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-11-10 07:39:42,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 07:39:42,921 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:42,921 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:42,922 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:42,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:42,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1286806896, now seen corresponding path program 1 times [2018-11-10 07:39:42,922 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:42,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:42,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:42,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:42,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:39:43,010 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:39:43,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-11-10 07:39:43,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 07:39:43,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 07:39:43,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 07:39:43,011 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-11-10 07:39:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:43,060 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-11-10 07:39:43,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 07:39:43,061 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2018-11-10 07:39:43,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:43,061 INFO L225 Difference]: With dead ends: 36 [2018-11-10 07:39:43,061 INFO L226 Difference]: Without dead ends: 31 [2018-11-10 07:39:43,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 07:39:43,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-10 07:39:43,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-10 07:39:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-10 07:39:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-11-10 07:39:43,065 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2018-11-10 07:39:43,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:43,065 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-11-10 07:39:43,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 07:39:43,065 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-11-10 07:39:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-10 07:39:43,066 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:43,066 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:43,066 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:43,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash -880646403, now seen corresponding path program 1 times [2018-11-10 07:39:43,067 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:43,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:43,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:43,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:43,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:39:43,179 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:39:43,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 07:39:43,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 07:39:43,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 07:39:43,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 07:39:43,180 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2018-11-10 07:39:43,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:43,237 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-11-10 07:39:43,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 07:39:43,237 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2018-11-10 07:39:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:43,238 INFO L225 Difference]: With dead ends: 38 [2018-11-10 07:39:43,238 INFO L226 Difference]: Without dead ends: 33 [2018-11-10 07:39:43,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 07:39:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-10 07:39:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-10 07:39:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 07:39:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-10 07:39:43,242 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2018-11-10 07:39:43,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:43,243 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-10 07:39:43,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 07:39:43,243 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-10 07:39:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-10 07:39:43,243 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:43,244 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:43,244 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:43,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:43,244 INFO L82 PathProgramCache]: Analyzing trace with hash -286061766, now seen corresponding path program 1 times [2018-11-10 07:39:43,244 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:43,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:43,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:43,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:43,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:39:43,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:43,333 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:43,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:43,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:39:43,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:43,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-10 07:39:43,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 07:39:43,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 07:39:43,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-10 07:39:43,400 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-11-10 07:39:43,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:43,461 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2018-11-10 07:39:43,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 07:39:43,462 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2018-11-10 07:39:43,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:43,462 INFO L225 Difference]: With dead ends: 40 [2018-11-10 07:39:43,462 INFO L226 Difference]: Without dead ends: 35 [2018-11-10 07:39:43,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-10 07:39:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-10 07:39:43,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-11-10 07:39:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-10 07:39:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-11-10 07:39:43,466 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2018-11-10 07:39:43,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:43,466 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-11-10 07:39:43,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 07:39:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-11-10 07:39:43,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-10 07:39:43,467 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:43,467 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:43,467 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:43,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:43,467 INFO L82 PathProgramCache]: Analyzing trace with hash -120875977, now seen corresponding path program 2 times [2018-11-10 07:39:43,468 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:43,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:43,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:43,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:43,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:39:43,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:43,557 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:43,563 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 07:39:43,573 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 07:39:43,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:43,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:39:43,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:43,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-10 07:39:43,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 07:39:43,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 07:39:43,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-10 07:39:43,599 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2018-11-10 07:39:43,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:43,673 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-11-10 07:39:43,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-10 07:39:43,674 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2018-11-10 07:39:43,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:43,674 INFO L225 Difference]: With dead ends: 42 [2018-11-10 07:39:43,674 INFO L226 Difference]: Without dead ends: 37 [2018-11-10 07:39:43,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-10 07:39:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-10 07:39:43,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-11-10 07:39:43,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-10 07:39:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-11-10 07:39:43,677 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2018-11-10 07:39:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:43,678 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-11-10 07:39:43,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 07:39:43,678 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-11-10 07:39:43,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-10 07:39:43,678 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:43,678 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:43,679 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:43,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:43,679 INFO L82 PathProgramCache]: Analyzing trace with hash -291122700, now seen corresponding path program 3 times [2018-11-10 07:39:43,679 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:43,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:43,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:43,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:43,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:39:43,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:43,803 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:43,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 07:39:43,817 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 07:39:43,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:43,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 07:39:43,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:43,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4] total 17 [2018-11-10 07:39:43,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 07:39:43,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 07:39:43,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-10 07:39:43,858 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 17 states. [2018-11-10 07:39:43,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:43,915 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2018-11-10 07:39:43,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 07:39:43,916 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2018-11-10 07:39:43,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:43,916 INFO L225 Difference]: With dead ends: 46 [2018-11-10 07:39:43,916 INFO L226 Difference]: Without dead ends: 41 [2018-11-10 07:39:43,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-10 07:39:43,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-10 07:39:43,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-11-10 07:39:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-10 07:39:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-11-10 07:39:43,920 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2018-11-10 07:39:43,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:43,920 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-11-10 07:39:43,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 07:39:43,920 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-11-10 07:39:43,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-10 07:39:43,921 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:43,921 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:43,921 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:43,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:43,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1159645813, now seen corresponding path program 4 times [2018-11-10 07:39:43,921 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:43,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:43,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:43,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:43,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 07:39:44,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:44,007 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:44,016 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 07:39:44,026 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 07:39:44,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:44,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 07:39:44,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:44,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-10 07:39:44,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 07:39:44,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 07:39:44,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-10 07:39:44,051 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 16 states. [2018-11-10 07:39:44,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:44,155 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-11-10 07:39:44,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 07:39:44,156 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2018-11-10 07:39:44,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:44,156 INFO L225 Difference]: With dead ends: 48 [2018-11-10 07:39:44,156 INFO L226 Difference]: Without dead ends: 42 [2018-11-10 07:39:44,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-10 07:39:44,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-10 07:39:44,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-10 07:39:44,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-10 07:39:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-10 07:39:44,159 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2018-11-10 07:39:44,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:44,160 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-10 07:39:44,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 07:39:44,160 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-10 07:39:44,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-10 07:39:44,160 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:44,160 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:44,160 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:44,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:44,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1330868616, now seen corresponding path program 5 times [2018-11-10 07:39:44,161 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:44,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:44,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:44,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:44,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 07:39:44,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:44,279 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:44,285 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 07:39:44,296 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-11-10 07:39:44,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:44,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-10 07:39:44,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:44,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2018-11-10 07:39:44,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-10 07:39:44,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-10 07:39:44,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-10 07:39:44,370 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-11-10 07:39:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:44,463 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-11-10 07:39:44,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-10 07:39:44,463 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-11-10 07:39:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:44,463 INFO L225 Difference]: With dead ends: 55 [2018-11-10 07:39:44,463 INFO L226 Difference]: Without dead ends: 49 [2018-11-10 07:39:44,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-10 07:39:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-10 07:39:44,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2018-11-10 07:39:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-10 07:39:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-10 07:39:44,468 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 41 [2018-11-10 07:39:44,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:44,468 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-10 07:39:44,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-10 07:39:44,469 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-10 07:39:44,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-10 07:39:44,469 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:44,469 INFO L375 BasicCegarLoop]: trace histogram [10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:44,469 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:44,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:44,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1267923961, now seen corresponding path program 6 times [2018-11-10 07:39:44,470 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:44,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:44,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:44,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:44,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 07:39:44,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:44,600 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:44,606 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 07:39:44,618 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-11-10 07:39:44,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:44,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 07:39:44,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:44,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-10 07:39:44,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 07:39:44,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 07:39:44,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-10 07:39:44,645 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2018-11-10 07:39:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:44,705 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-11-10 07:39:44,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 07:39:44,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2018-11-10 07:39:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:44,705 INFO L225 Difference]: With dead ends: 60 [2018-11-10 07:39:44,705 INFO L226 Difference]: Without dead ends: 50 [2018-11-10 07:39:44,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-10 07:39:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-10 07:39:44,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-11-10 07:39:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-11-10 07:39:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-11-10 07:39:44,708 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2018-11-10 07:39:44,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:44,708 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-11-10 07:39:44,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 07:39:44,708 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-11-10 07:39:44,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 07:39:44,708 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:44,708 INFO L375 BasicCegarLoop]: trace histogram [11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:44,709 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:44,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1690572042, now seen corresponding path program 7 times [2018-11-10 07:39:44,709 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:44,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:44,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:44,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:44,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 07:39:44,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:44,852 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:44,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:44,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 07:39:44,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:44,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-10 07:39:44,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 07:39:44,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 07:39:44,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-10 07:39:44,891 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2018-11-10 07:39:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:44,949 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-11-10 07:39:44,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 07:39:44,949 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2018-11-10 07:39:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:44,950 INFO L225 Difference]: With dead ends: 62 [2018-11-10 07:39:44,950 INFO L226 Difference]: Without dead ends: 52 [2018-11-10 07:39:44,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-10 07:39:44,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-10 07:39:44,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-11-10 07:39:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-10 07:39:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-11-10 07:39:44,955 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2018-11-10 07:39:44,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:44,955 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-11-10 07:39:44,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 07:39:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-11-10 07:39:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-10 07:39:44,956 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:44,956 INFO L375 BasicCegarLoop]: trace histogram [12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:44,956 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:44,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:44,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1536880973, now seen corresponding path program 8 times [2018-11-10 07:39:44,956 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:44,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:44,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:44,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:44,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 07:39:45,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:45,103 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:45,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 07:39:45,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 07:39:45,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:45,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 75 proven. 49 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 07:39:45,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:45,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2018-11-10 07:39:45,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-10 07:39:45,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-10 07:39:45,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-10 07:39:45,244 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 28 states. [2018-11-10 07:39:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:45,353 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2018-11-10 07:39:45,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-10 07:39:45,354 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2018-11-10 07:39:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:45,354 INFO L225 Difference]: With dead ends: 73 [2018-11-10 07:39:45,355 INFO L226 Difference]: Without dead ends: 63 [2018-11-10 07:39:45,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-10 07:39:45,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-10 07:39:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-11-10 07:39:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-10 07:39:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-11-10 07:39:45,359 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 51 [2018-11-10 07:39:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:45,359 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-11-10 07:39:45,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-10 07:39:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-11-10 07:39:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 07:39:45,360 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:45,360 INFO L375 BasicCegarLoop]: trace histogram [17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:45,361 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:45,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:45,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2034313832, now seen corresponding path program 9 times [2018-11-10 07:39:45,361 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:45,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:45,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:45,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:45,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 150 proven. 90 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-11-10 07:39:45,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:45,584 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:45,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 07:39:45,632 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-11-10 07:39:45,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:45,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:39:46,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:46,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 47 [2018-11-10 07:39:46,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-10 07:39:46,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-10 07:39:46,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-11-10 07:39:46,161 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 47 states. [2018-11-10 07:39:46,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:46,275 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2018-11-10 07:39:46,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-10 07:39:46,276 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 61 [2018-11-10 07:39:46,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:46,276 INFO L225 Difference]: With dead ends: 119 [2018-11-10 07:39:46,276 INFO L226 Difference]: Without dead ends: 101 [2018-11-10 07:39:46,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-11-10 07:39:46,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-11-10 07:39:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2018-11-10 07:39:46,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-11-10 07:39:46,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-11-10 07:39:46,285 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 61 [2018-11-10 07:39:46,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:46,285 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-11-10 07:39:46,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-10 07:39:46,285 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-11-10 07:39:46,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-11-10 07:39:46,286 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:46,286 INFO L375 BasicCegarLoop]: trace histogram [36, 26, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:46,286 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:46,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:46,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1443054295, now seen corresponding path program 10 times [2018-11-10 07:39:46,286 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:46,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:46,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:46,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:46,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 561 proven. 110 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2018-11-10 07:39:46,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:46,439 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:46,445 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 07:39:46,463 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 07:39:46,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:46,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 561 proven. 110 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2018-11-10 07:39:46,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:46,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-10 07:39:46,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-10 07:39:46,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-10 07:39:46,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-10 07:39:46,495 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 22 states. [2018-11-10 07:39:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:46,576 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-11-10 07:39:46,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-10 07:39:46,576 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2018-11-10 07:39:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:46,577 INFO L225 Difference]: With dead ends: 156 [2018-11-10 07:39:46,577 INFO L226 Difference]: Without dead ends: 102 [2018-11-10 07:39:46,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-10 07:39:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-11-10 07:39:46,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-11-10 07:39:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-11-10 07:39:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-11-10 07:39:46,582 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2018-11-10 07:39:46,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:46,583 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-11-10 07:39:46,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-10 07:39:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-11-10 07:39:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-10 07:39:46,585 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:46,585 INFO L375 BasicCegarLoop]: trace histogram [37, 26, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:46,585 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:46,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:46,585 INFO L82 PathProgramCache]: Analyzing trace with hash 430708646, now seen corresponding path program 11 times [2018-11-10 07:39:46,586 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:46,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:46,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:46,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:46,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 612 proven. 132 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2018-11-10 07:39:46,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:46,757 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:46,772 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 07:39:46,829 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-11-10 07:39:46,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:46,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 583 proven. 676 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-11-10 07:39:47,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:47,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 50 [2018-11-10 07:39:47,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-10 07:39:47,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-10 07:39:47,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-11-10 07:39:47,385 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 50 states. [2018-11-10 07:39:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:47,558 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2018-11-10 07:39:47,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-10 07:39:47,558 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 101 [2018-11-10 07:39:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:47,558 INFO L225 Difference]: With dead ends: 161 [2018-11-10 07:39:47,558 INFO L226 Difference]: Without dead ends: 107 [2018-11-10 07:39:47,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-11-10 07:39:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-11-10 07:39:47,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2018-11-10 07:39:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-11-10 07:39:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-11-10 07:39:47,564 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2018-11-10 07:39:47,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:47,564 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-11-10 07:39:47,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-10 07:39:47,564 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-11-10 07:39:47,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-11-10 07:39:47,565 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:47,565 INFO L375 BasicCegarLoop]: trace histogram [39, 27, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:47,565 INFO L424 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:47,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:47,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1508217725, now seen corresponding path program 12 times [2018-11-10 07:39:47,566 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:47,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:47,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:47,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:47,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 689 proven. 156 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2018-11-10 07:39:47,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:47,795 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:47,803 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 07:39:47,850 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-11-10 07:39:47,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:47,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 660 proven. 729 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-11-10 07:39:48,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:48,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 30] total 52 [2018-11-10 07:39:48,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-10 07:39:48,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-10 07:39:48,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-10 07:39:48,384 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 52 states. [2018-11-10 07:39:48,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:48,540 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2018-11-10 07:39:48,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-10 07:39:48,540 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 105 [2018-11-10 07:39:48,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:48,540 INFO L225 Difference]: With dead ends: 167 [2018-11-10 07:39:48,540 INFO L226 Difference]: Without dead ends: 111 [2018-11-10 07:39:48,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-10 07:39:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-11-10 07:39:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-11-10 07:39:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-11-10 07:39:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-11-10 07:39:48,544 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 105 [2018-11-10 07:39:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:48,544 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-11-10 07:39:48,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-10 07:39:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-11-10 07:39:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-10 07:39:48,545 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:48,545 INFO L375 BasicCegarLoop]: trace histogram [41, 28, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:48,545 INFO L424 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:48,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:48,546 INFO L82 PathProgramCache]: Analyzing trace with hash 997928724, now seen corresponding path program 13 times [2018-11-10 07:39:48,546 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:48,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:48,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:48,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:48,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 770 proven. 182 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-10 07:39:48,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:48,712 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:48,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:48,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 770 proven. 182 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-10 07:39:48,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:48,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-10 07:39:48,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-10 07:39:48,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-10 07:39:48,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-11-10 07:39:48,767 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 25 states. [2018-11-10 07:39:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:48,831 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-11-10 07:39:48,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-10 07:39:48,832 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 109 [2018-11-10 07:39:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:48,833 INFO L225 Difference]: With dead ends: 170 [2018-11-10 07:39:48,833 INFO L226 Difference]: Without dead ends: 112 [2018-11-10 07:39:48,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-11-10 07:39:48,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-11-10 07:39:48,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-11-10 07:39:48,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-11-10 07:39:48,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-11-10 07:39:48,837 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 109 [2018-11-10 07:39:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:48,838 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-11-10 07:39:48,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-10 07:39:48,838 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-11-10 07:39:48,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-11-10 07:39:48,838 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:48,838 INFO L375 BasicCegarLoop]: trace histogram [42, 28, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:48,838 INFO L424 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:48,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:48,839 INFO L82 PathProgramCache]: Analyzing trace with hash 921522513, now seen corresponding path program 14 times [2018-11-10 07:39:48,839 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:48,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:48,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:48,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:48,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 825 proven. 210 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-10 07:39:49,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:49,068 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:49,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 07:39:49,097 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 07:39:49,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:49,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 825 proven. 210 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-10 07:39:49,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:49,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-10 07:39:49,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-10 07:39:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-10 07:39:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-10 07:39:49,139 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 26 states. [2018-11-10 07:39:49,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:49,219 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2018-11-10 07:39:49,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-10 07:39:49,220 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 111 [2018-11-10 07:39:49,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:49,221 INFO L225 Difference]: With dead ends: 172 [2018-11-10 07:39:49,221 INFO L226 Difference]: Without dead ends: 114 [2018-11-10 07:39:49,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-10 07:39:49,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-11-10 07:39:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-11-10 07:39:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-11-10 07:39:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-11-10 07:39:49,226 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2018-11-10 07:39:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:49,227 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-11-10 07:39:49,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-10 07:39:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-11-10 07:39:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-11-10 07:39:49,227 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:49,227 INFO L375 BasicCegarLoop]: trace histogram [43, 28, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:49,227 INFO L424 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:49,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:49,228 INFO L82 PathProgramCache]: Analyzing trace with hash 509597774, now seen corresponding path program 15 times [2018-11-10 07:39:49,228 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:49,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:49,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:49,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:49,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 880 proven. 240 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-10 07:39:49,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:49,448 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:49,454 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 07:39:49,487 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-11-10 07:39:49,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:49,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 880 proven. 240 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-10 07:39:49,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:49,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-10 07:39:49,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-10 07:39:49,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-10 07:39:49,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-11-10 07:39:49,518 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 27 states. [2018-11-10 07:39:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:49,588 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-11-10 07:39:49,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-10 07:39:49,590 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 113 [2018-11-10 07:39:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:49,591 INFO L225 Difference]: With dead ends: 174 [2018-11-10 07:39:49,591 INFO L226 Difference]: Without dead ends: 116 [2018-11-10 07:39:49,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-11-10 07:39:49,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-11-10 07:39:49,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-11-10 07:39:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-11-10 07:39:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-11-10 07:39:49,598 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 113 [2018-11-10 07:39:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:49,598 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-11-10 07:39:49,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-10 07:39:49,598 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-11-10 07:39:49,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-10 07:39:49,599 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:49,599 INFO L375 BasicCegarLoop]: trace histogram [44, 28, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:49,599 INFO L424 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:49,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:49,600 INFO L82 PathProgramCache]: Analyzing trace with hash -213085173, now seen corresponding path program 16 times [2018-11-10 07:39:49,600 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:49,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:49,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:49,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:49,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 935 proven. 272 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-10 07:39:49,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:49,868 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:49,873 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 07:39:49,892 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 07:39:49,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:49,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 935 proven. 272 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-10 07:39:49,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:49,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-10 07:39:49,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-10 07:39:49,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-10 07:39:49,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-10 07:39:49,934 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 28 states. [2018-11-10 07:39:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:50,000 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-11-10 07:39:50,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-10 07:39:50,001 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 115 [2018-11-10 07:39:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:50,002 INFO L225 Difference]: With dead ends: 176 [2018-11-10 07:39:50,002 INFO L226 Difference]: Without dead ends: 118 [2018-11-10 07:39:50,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-10 07:39:50,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-11-10 07:39:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-11-10 07:39:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-11-10 07:39:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-11-10 07:39:50,006 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 115 [2018-11-10 07:39:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:50,006 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-11-10 07:39:50,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-10 07:39:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-11-10 07:39:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-10 07:39:50,007 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:50,007 INFO L375 BasicCegarLoop]: trace histogram [45, 28, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:50,007 INFO L424 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:50,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1073304712, now seen corresponding path program 17 times [2018-11-10 07:39:50,007 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:50,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:50,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:50,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:50,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 990 proven. 306 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-10 07:39:50,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:50,259 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:50,265 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 07:39:50,342 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-11-10 07:39:50,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:50,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 969 proven. 784 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-11-10 07:39:50,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:50,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 58 [2018-11-10 07:39:50,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-11-10 07:39:50,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-11-10 07:39:50,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-11-10 07:39:50,977 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 58 states. [2018-11-10 07:39:51,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:51,121 INFO L93 Difference]: Finished difference Result 181 states and 184 transitions. [2018-11-10 07:39:51,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-10 07:39:51,121 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 117 [2018-11-10 07:39:51,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:51,122 INFO L225 Difference]: With dead ends: 181 [2018-11-10 07:39:51,122 INFO L226 Difference]: Without dead ends: 123 [2018-11-10 07:39:51,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-11-10 07:39:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-11-10 07:39:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-11-10 07:39:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-11-10 07:39:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2018-11-10 07:39:51,127 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 117 [2018-11-10 07:39:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:51,127 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2018-11-10 07:39:51,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-11-10 07:39:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2018-11-10 07:39:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-10 07:39:51,128 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:51,128 INFO L375 BasicCegarLoop]: trace histogram [47, 29, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:51,128 INFO L424 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:51,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:51,129 INFO L82 PathProgramCache]: Analyzing trace with hash -709786145, now seen corresponding path program 18 times [2018-11-10 07:39:51,129 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:51,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:51,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:51,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:51,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1083 proven. 342 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2018-11-10 07:39:51,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:51,379 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:51,384 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 07:39:51,430 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-11-10 07:39:51,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:51,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1062 proven. 841 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2018-11-10 07:39:52,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:52,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 60 [2018-11-10 07:39:52,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-11-10 07:39:52,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-11-10 07:39:52,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-11-10 07:39:52,024 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 60 states. [2018-11-10 07:39:52,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:52,162 INFO L93 Difference]: Finished difference Result 187 states and 190 transitions. [2018-11-10 07:39:52,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-10 07:39:52,162 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 121 [2018-11-10 07:39:52,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:52,163 INFO L225 Difference]: With dead ends: 187 [2018-11-10 07:39:52,163 INFO L226 Difference]: Without dead ends: 127 [2018-11-10 07:39:52,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-11-10 07:39:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-10 07:39:52,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2018-11-10 07:39:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-11-10 07:39:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-11-10 07:39:52,167 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 121 [2018-11-10 07:39:52,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:52,167 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-11-10 07:39:52,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-11-10 07:39:52,168 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-11-10 07:39:52,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-10 07:39:52,168 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:52,168 INFO L375 BasicCegarLoop]: trace histogram [49, 30, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:52,169 INFO L424 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:52,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:52,169 INFO L82 PathProgramCache]: Analyzing trace with hash -934578442, now seen corresponding path program 19 times [2018-11-10 07:39:52,169 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:52,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:52,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:52,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:52,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1180 proven. 380 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-10 07:39:52,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:52,421 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:52,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:52,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1180 proven. 380 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-10 07:39:52,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:52,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-11-10 07:39:52,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-10 07:39:52,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-10 07:39:52,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-11-10 07:39:52,477 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 31 states. [2018-11-10 07:39:52,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:52,559 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2018-11-10 07:39:52,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-10 07:39:52,560 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2018-11-10 07:39:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:52,560 INFO L225 Difference]: With dead ends: 190 [2018-11-10 07:39:52,561 INFO L226 Difference]: Without dead ends: 128 [2018-11-10 07:39:52,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-11-10 07:39:52,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-11-10 07:39:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-11-10 07:39:52,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-11-10 07:39:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2018-11-10 07:39:52,565 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 125 [2018-11-10 07:39:52,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:52,565 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2018-11-10 07:39:52,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-10 07:39:52,566 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2018-11-10 07:39:52,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-10 07:39:52,566 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:52,566 INFO L375 BasicCegarLoop]: trace histogram [50, 30, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:52,567 INFO L424 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:52,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:52,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1739816755, now seen corresponding path program 20 times [2018-11-10 07:39:52,567 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:52,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:52,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:52,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:52,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1239 proven. 420 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-10 07:39:52,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:52,881 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:52,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 07:39:52,907 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 07:39:52,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:52,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1239 proven. 420 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-10 07:39:52,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:52,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-11-10 07:39:52,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-10 07:39:52,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-10 07:39:52,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-10 07:39:52,944 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 32 states. [2018-11-10 07:39:53,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:53,039 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2018-11-10 07:39:53,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-10 07:39:53,040 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 127 [2018-11-10 07:39:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:53,041 INFO L225 Difference]: With dead ends: 192 [2018-11-10 07:39:53,041 INFO L226 Difference]: Without dead ends: 130 [2018-11-10 07:39:53,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-10 07:39:53,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-11-10 07:39:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-11-10 07:39:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-11-10 07:39:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2018-11-10 07:39:53,046 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 127 [2018-11-10 07:39:53,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:53,046 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2018-11-10 07:39:53,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-10 07:39:53,046 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2018-11-10 07:39:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-10 07:39:53,047 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:53,047 INFO L375 BasicCegarLoop]: trace histogram [51, 30, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:53,047 INFO L424 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:53,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:53,047 INFO L82 PathProgramCache]: Analyzing trace with hash -851809232, now seen corresponding path program 21 times [2018-11-10 07:39:53,048 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:53,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:53,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:53,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:53,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1298 proven. 462 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-10 07:39:53,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:53,337 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:53,342 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 07:39:53,392 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-11-10 07:39:53,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:53,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1298 proven. 462 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-10 07:39:53,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:53,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-11-10 07:39:53,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-10 07:39:53,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-10 07:39:53,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-11-10 07:39:53,429 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 33 states. [2018-11-10 07:39:53,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:53,516 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-11-10 07:39:53,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-10 07:39:53,517 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 129 [2018-11-10 07:39:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:53,517 INFO L225 Difference]: With dead ends: 194 [2018-11-10 07:39:53,517 INFO L226 Difference]: Without dead ends: 132 [2018-11-10 07:39:53,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-11-10 07:39:53,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-11-10 07:39:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-11-10 07:39:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-11-10 07:39:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2018-11-10 07:39:53,522 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2018-11-10 07:39:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:53,522 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2018-11-10 07:39:53,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-10 07:39:53,522 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2018-11-10 07:39:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-11-10 07:39:53,523 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:53,523 INFO L375 BasicCegarLoop]: trace histogram [52, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:53,523 INFO L424 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:53,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:53,523 INFO L82 PathProgramCache]: Analyzing trace with hash -323351059, now seen corresponding path program 22 times [2018-11-10 07:39:53,524 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:53,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:53,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:53,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:53,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1357 proven. 506 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-10 07:39:53,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:53,842 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:53,848 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 07:39:53,871 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 07:39:53,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:53,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1357 proven. 506 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-10 07:39:53,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:53,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-11-10 07:39:53,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-10 07:39:53,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-10 07:39:53,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-10 07:39:53,901 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 34 states. [2018-11-10 07:39:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:53,973 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2018-11-10 07:39:53,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-10 07:39:53,973 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 131 [2018-11-10 07:39:53,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:53,974 INFO L225 Difference]: With dead ends: 196 [2018-11-10 07:39:53,974 INFO L226 Difference]: Without dead ends: 134 [2018-11-10 07:39:53,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-10 07:39:53,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-10 07:39:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-11-10 07:39:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-11-10 07:39:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2018-11-10 07:39:53,980 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 131 [2018-11-10 07:39:53,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:53,980 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2018-11-10 07:39:53,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-10 07:39:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2018-11-10 07:39:53,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-10 07:39:53,981 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:53,981 INFO L375 BasicCegarLoop]: trace histogram [53, 30, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:53,981 INFO L424 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:53,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:53,982 INFO L82 PathProgramCache]: Analyzing trace with hash 718812266, now seen corresponding path program 23 times [2018-11-10 07:39:53,982 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:53,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:53,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:53,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:53,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1416 proven. 552 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-10 07:39:54,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:54,341 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:54,346 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 07:39:54,394 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-11-10 07:39:54,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:54,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1403 proven. 900 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-11-10 07:39:55,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:55,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 66 [2018-11-10 07:39:55,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-11-10 07:39:55,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-11-10 07:39:55,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-11-10 07:39:55,082 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 66 states. [2018-11-10 07:39:55,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:55,267 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2018-11-10 07:39:55,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-11-10 07:39:55,268 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 133 [2018-11-10 07:39:55,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:55,268 INFO L225 Difference]: With dead ends: 201 [2018-11-10 07:39:55,269 INFO L226 Difference]: Without dead ends: 139 [2018-11-10 07:39:55,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-11-10 07:39:55,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-11-10 07:39:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2018-11-10 07:39:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-11-10 07:39:55,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-11-10 07:39:55,274 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 133 [2018-11-10 07:39:55,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:55,274 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-11-10 07:39:55,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-11-10 07:39:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-11-10 07:39:55,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-11-10 07:39:55,275 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:55,275 INFO L375 BasicCegarLoop]: trace histogram [55, 31, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:55,275 INFO L424 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:55,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:55,275 INFO L82 PathProgramCache]: Analyzing trace with hash -223978687, now seen corresponding path program 24 times [2018-11-10 07:39:55,276 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:55,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:55,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:55,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:55,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1525 proven. 600 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-11-10 07:39:55,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:55,631 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:55,648 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 07:39:55,732 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-11-10 07:39:55,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:55,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1512 proven. 961 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-11-10 07:39:56,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:56,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 68 [2018-11-10 07:39:56,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-11-10 07:39:56,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-11-10 07:39:56,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-11-10 07:39:56,620 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 68 states. [2018-11-10 07:39:56,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:56,760 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2018-11-10 07:39:56,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-11-10 07:39:56,761 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 137 [2018-11-10 07:39:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:56,761 INFO L225 Difference]: With dead ends: 207 [2018-11-10 07:39:56,762 INFO L226 Difference]: Without dead ends: 143 [2018-11-10 07:39:56,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-11-10 07:39:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-11-10 07:39:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2018-11-10 07:39:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-11-10 07:39:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2018-11-10 07:39:56,766 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2018-11-10 07:39:56,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:56,766 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2018-11-10 07:39:56,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-11-10 07:39:56,766 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2018-11-10 07:39:56,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-11-10 07:39:56,767 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:56,767 INFO L375 BasicCegarLoop]: trace histogram [57, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:56,767 INFO L424 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:56,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:56,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1341398568, now seen corresponding path program 25 times [2018-11-10 07:39:56,767 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:56,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:56,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:56,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:56,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1638 proven. 650 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-10 07:39:57,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:57,191 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:57,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:57,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1638 proven. 650 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-10 07:39:57,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:57,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-11-10 07:39:57,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-10 07:39:57,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-10 07:39:57,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-11-10 07:39:57,247 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 37 states. [2018-11-10 07:39:57,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:57,317 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2018-11-10 07:39:57,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-10 07:39:57,317 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 141 [2018-11-10 07:39:57,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:57,318 INFO L225 Difference]: With dead ends: 210 [2018-11-10 07:39:57,318 INFO L226 Difference]: Without dead ends: 144 [2018-11-10 07:39:57,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-11-10 07:39:57,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-11-10 07:39:57,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-11-10 07:39:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-11-10 07:39:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2018-11-10 07:39:57,323 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2018-11-10 07:39:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:57,323 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2018-11-10 07:39:57,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-10 07:39:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2018-11-10 07:39:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-11-10 07:39:57,324 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:57,324 INFO L375 BasicCegarLoop]: trace histogram [58, 32, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:57,324 INFO L424 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:57,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:57,324 INFO L82 PathProgramCache]: Analyzing trace with hash 115200021, now seen corresponding path program 26 times [2018-11-10 07:39:57,325 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:57,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:57,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:57,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:39:57,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1701 proven. 702 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-10 07:39:57,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:57,735 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:57,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 07:39:57,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 07:39:57,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:57,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1701 proven. 702 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-10 07:39:57,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:57,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-11-10 07:39:57,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-10 07:39:57,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-10 07:39:57,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-10 07:39:57,816 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 38 states. [2018-11-10 07:39:57,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:57,962 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-11-10 07:39:57,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-10 07:39:57,963 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 143 [2018-11-10 07:39:57,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:57,964 INFO L225 Difference]: With dead ends: 212 [2018-11-10 07:39:57,964 INFO L226 Difference]: Without dead ends: 146 [2018-11-10 07:39:57,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-10 07:39:57,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-11-10 07:39:57,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-11-10 07:39:57,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-11-10 07:39:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2018-11-10 07:39:57,972 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 143 [2018-11-10 07:39:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:57,972 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2018-11-10 07:39:57,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-10 07:39:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2018-11-10 07:39:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-10 07:39:57,973 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:57,973 INFO L375 BasicCegarLoop]: trace histogram [59, 32, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:57,973 INFO L424 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:57,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:57,973 INFO L82 PathProgramCache]: Analyzing trace with hash -252894446, now seen corresponding path program 27 times [2018-11-10 07:39:57,974 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:57,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:57,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:57,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:57,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1764 proven. 756 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-10 07:39:58,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:58,452 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:58,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 07:39:58,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-11-10 07:39:58,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:58,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1764 proven. 756 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-10 07:39:58,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:58,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-11-10 07:39:58,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-10 07:39:58,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-10 07:39:58,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-11-10 07:39:58,549 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 39 states. [2018-11-10 07:39:58,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:58,622 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2018-11-10 07:39:58,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-10 07:39:58,622 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 145 [2018-11-10 07:39:58,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:58,623 INFO L225 Difference]: With dead ends: 214 [2018-11-10 07:39:58,623 INFO L226 Difference]: Without dead ends: 148 [2018-11-10 07:39:58,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-11-10 07:39:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-11-10 07:39:58,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-11-10 07:39:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-11-10 07:39:58,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2018-11-10 07:39:58,628 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 145 [2018-11-10 07:39:58,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:58,628 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2018-11-10 07:39:58,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-10 07:39:58,628 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2018-11-10 07:39:58,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-11-10 07:39:58,628 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:58,629 INFO L375 BasicCegarLoop]: trace histogram [60, 32, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:58,629 INFO L424 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:58,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:58,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1804358961, now seen corresponding path program 28 times [2018-11-10 07:39:58,629 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:58,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:58,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:58,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:58,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1827 proven. 812 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-10 07:39:59,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:59,061 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:59,066 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 07:39:59,089 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 07:39:59,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:59,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:39:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1827 proven. 812 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-10 07:39:59,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:39:59,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-11-10 07:39:59,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-10 07:39:59,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-10 07:39:59,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-10 07:39:59,120 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 40 states. [2018-11-10 07:39:59,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:39:59,224 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2018-11-10 07:39:59,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-10 07:39:59,225 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 147 [2018-11-10 07:39:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:39:59,226 INFO L225 Difference]: With dead ends: 216 [2018-11-10 07:39:59,226 INFO L226 Difference]: Without dead ends: 150 [2018-11-10 07:39:59,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-10 07:39:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-11-10 07:39:59,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-11-10 07:39:59,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-11-10 07:39:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-11-10 07:39:59,231 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2018-11-10 07:39:59,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:39:59,231 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-11-10 07:39:59,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-10 07:39:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-11-10 07:39:59,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-11-10 07:39:59,233 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:39:59,233 INFO L375 BasicCegarLoop]: trace histogram [61, 32, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:39:59,233 INFO L424 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:39:59,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:39:59,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1886861132, now seen corresponding path program 29 times [2018-11-10 07:39:59,234 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:39:59,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:39:59,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:59,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:39:59,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:39:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:39:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1890 proven. 870 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-10 07:39:59,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:39:59,659 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:39:59,667 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 07:39:59,763 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 62 check-sat command(s) [2018-11-10 07:39:59,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:39:59,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1885 proven. 1024 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-11-10 07:40:00,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:00,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 35] total 74 [2018-11-10 07:40:00,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-11-10 07:40:00,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-11-10 07:40:00,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-11-10 07:40:00,578 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 74 states. [2018-11-10 07:40:00,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:00,734 INFO L93 Difference]: Finished difference Result 221 states and 224 transitions. [2018-11-10 07:40:00,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-11-10 07:40:00,734 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 149 [2018-11-10 07:40:00,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:00,735 INFO L225 Difference]: With dead ends: 221 [2018-11-10 07:40:00,735 INFO L226 Difference]: Without dead ends: 155 [2018-11-10 07:40:00,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-11-10 07:40:00,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-11-10 07:40:00,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2018-11-10 07:40:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-11-10 07:40:00,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2018-11-10 07:40:00,740 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 149 [2018-11-10 07:40:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:00,740 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2018-11-10 07:40:00,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-11-10 07:40:00,740 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2018-11-10 07:40:00,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-11-10 07:40:00,741 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:00,741 INFO L375 BasicCegarLoop]: trace histogram [63, 33, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:00,741 INFO L424 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:00,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:00,741 INFO L82 PathProgramCache]: Analyzing trace with hash 223515555, now seen corresponding path program 30 times [2018-11-10 07:40:00,742 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:00,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:00,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:00,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:00,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 2015 proven. 930 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2018-11-10 07:40:01,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:01,149 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:01,155 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 07:40:01,252 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2018-11-10 07:40:01,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:40:01,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 2010 proven. 1089 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-11-10 07:40:02,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:02,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 36] total 76 [2018-11-10 07:40:02,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-11-10 07:40:02,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-11-10 07:40:02,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-11-10 07:40:02,119 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 76 states. [2018-11-10 07:40:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:02,272 INFO L93 Difference]: Finished difference Result 227 states and 230 transitions. [2018-11-10 07:40:02,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-11-10 07:40:02,273 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 153 [2018-11-10 07:40:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:02,273 INFO L225 Difference]: With dead ends: 227 [2018-11-10 07:40:02,273 INFO L226 Difference]: Without dead ends: 159 [2018-11-10 07:40:02,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-11-10 07:40:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-11-10 07:40:02,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2018-11-10 07:40:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-11-10 07:40:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2018-11-10 07:40:02,279 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 153 [2018-11-10 07:40:02,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:02,279 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2018-11-10 07:40:02,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-11-10 07:40:02,279 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2018-11-10 07:40:02,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-10 07:40:02,280 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:02,280 INFO L375 BasicCegarLoop]: trace histogram [65, 34, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:02,280 INFO L424 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:02,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash -39129158, now seen corresponding path program 31 times [2018-11-10 07:40:02,280 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:02,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:02,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:02,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:02,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2144 proven. 992 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-10 07:40:02,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:02,711 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:02,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:40:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:02,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2144 proven. 992 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-10 07:40:02,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:02,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-11-10 07:40:02,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-10 07:40:02,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-10 07:40:02,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-10 07:40:02,798 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand 43 states. [2018-11-10 07:40:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:02,905 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-11-10 07:40:02,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-10 07:40:02,906 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 157 [2018-11-10 07:40:02,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:02,907 INFO L225 Difference]: With dead ends: 230 [2018-11-10 07:40:02,907 INFO L226 Difference]: Without dead ends: 160 [2018-11-10 07:40:02,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-10 07:40:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-11-10 07:40:02,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-11-10 07:40:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-11-10 07:40:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2018-11-10 07:40:02,916 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 157 [2018-11-10 07:40:02,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:02,916 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2018-11-10 07:40:02,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-10 07:40:02,916 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2018-11-10 07:40:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-11-10 07:40:02,917 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:02,917 INFO L375 BasicCegarLoop]: trace histogram [66, 34, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:02,917 INFO L424 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:02,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:02,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1218788361, now seen corresponding path program 32 times [2018-11-10 07:40:02,918 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:02,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:02,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:02,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:40:02,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2211 proven. 1056 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-10 07:40:03,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:03,443 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:03,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 07:40:03,478 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 07:40:03,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:40:03,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2211 proven. 1056 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-10 07:40:03,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:03,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-11-10 07:40:03,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-10 07:40:03,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-10 07:40:03,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-11-10 07:40:03,530 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 44 states. [2018-11-10 07:40:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:03,625 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2018-11-10 07:40:03,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-10 07:40:03,625 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 159 [2018-11-10 07:40:03,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:03,625 INFO L225 Difference]: With dead ends: 232 [2018-11-10 07:40:03,625 INFO L226 Difference]: Without dead ends: 162 [2018-11-10 07:40:03,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-11-10 07:40:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-11-10 07:40:03,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-11-10 07:40:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-11-10 07:40:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2018-11-10 07:40:03,631 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2018-11-10 07:40:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:03,631 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2018-11-10 07:40:03,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-10 07:40:03,631 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2018-11-10 07:40:03,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-11-10 07:40:03,632 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:03,632 INFO L375 BasicCegarLoop]: trace histogram [67, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:03,632 INFO L424 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:03,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:03,632 INFO L82 PathProgramCache]: Analyzing trace with hash -999916300, now seen corresponding path program 33 times [2018-11-10 07:40:03,632 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:03,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:03,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:03,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:03,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-10 07:40:04,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:04,122 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:04,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 07:40:04,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2018-11-10 07:40:04,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:40:04,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-10 07:40:04,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:04,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-11-10 07:40:04,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-10 07:40:04,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-10 07:40:04,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-11-10 07:40:04,241 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 45 states. [2018-11-10 07:40:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:04,330 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2018-11-10 07:40:04,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-10 07:40:04,331 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 161 [2018-11-10 07:40:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:04,331 INFO L225 Difference]: With dead ends: 234 [2018-11-10 07:40:04,331 INFO L226 Difference]: Without dead ends: 164 [2018-11-10 07:40:04,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-11-10 07:40:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-11-10 07:40:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-11-10 07:40:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-11-10 07:40:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2018-11-10 07:40:04,336 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 161 [2018-11-10 07:40:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:04,336 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2018-11-10 07:40:04,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-10 07:40:04,337 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2018-11-10 07:40:04,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-11-10 07:40:04,337 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:04,337 INFO L375 BasicCegarLoop]: trace histogram [68, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:04,338 INFO L424 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:04,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:04,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1117263183, now seen corresponding path program 34 times [2018-11-10 07:40:04,338 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:04,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:04,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:04,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:04,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2345 proven. 1190 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-10 07:40:04,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:04,814 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:04,819 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 07:40:04,842 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 07:40:04,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:40:04,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2345 proven. 1190 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-10 07:40:04,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:04,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-11-10 07:40:04,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-10 07:40:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-10 07:40:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-11-10 07:40:04,874 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 46 states. [2018-11-10 07:40:04,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:04,971 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-11-10 07:40:04,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-10 07:40:04,971 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 163 [2018-11-10 07:40:04,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:04,972 INFO L225 Difference]: With dead ends: 236 [2018-11-10 07:40:04,972 INFO L226 Difference]: Without dead ends: 166 [2018-11-10 07:40:04,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-11-10 07:40:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-11-10 07:40:04,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-11-10 07:40:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-11-10 07:40:04,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-11-10 07:40:04,975 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 163 [2018-11-10 07:40:04,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:04,975 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-11-10 07:40:04,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-10 07:40:04,975 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-11-10 07:40:04,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-11-10 07:40:04,976 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:04,976 INFO L375 BasicCegarLoop]: trace histogram [69, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:04,976 INFO L424 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:04,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:04,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2076499246, now seen corresponding path program 35 times [2018-11-10 07:40:04,976 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:04,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:04,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:04,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:04,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2412 proven. 1260 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-10 07:40:05,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:05,505 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:05,511 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 07:40:05,571 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-11-10 07:40:05,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:40:05,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2415 proven. 1156 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-11-10 07:40:06,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:06,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 37] total 82 [2018-11-10 07:40:06,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-11-10 07:40:06,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-11-10 07:40:06,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-11-10 07:40:06,569 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 82 states. [2018-11-10 07:40:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:06,742 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2018-11-10 07:40:06,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-11-10 07:40:06,742 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 165 [2018-11-10 07:40:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:06,743 INFO L225 Difference]: With dead ends: 241 [2018-11-10 07:40:06,743 INFO L226 Difference]: Without dead ends: 171 [2018-11-10 07:40:06,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-11-10 07:40:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-11-10 07:40:06,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2018-11-10 07:40:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-11-10 07:40:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2018-11-10 07:40:06,747 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 165 [2018-11-10 07:40:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:06,747 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2018-11-10 07:40:06,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-11-10 07:40:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2018-11-10 07:40:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-10 07:40:06,748 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:06,748 INFO L375 BasicCegarLoop]: trace histogram [71, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:06,748 INFO L424 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:06,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:06,748 INFO L82 PathProgramCache]: Analyzing trace with hash 654618373, now seen corresponding path program 36 times [2018-11-10 07:40:06,748 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:06,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:06,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:06,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:06,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2553 proven. 1332 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2018-11-10 07:40:07,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:07,271 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:07,276 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 07:40:07,347 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2018-11-10 07:40:07,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:40:07,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2556 proven. 1225 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2018-11-10 07:40:08,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:08,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 38] total 84 [2018-11-10 07:40:08,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-11-10 07:40:08,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-11-10 07:40:08,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-11-10 07:40:08,376 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand 84 states. [2018-11-10 07:40:08,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:08,541 INFO L93 Difference]: Finished difference Result 247 states and 250 transitions. [2018-11-10 07:40:08,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-11-10 07:40:08,541 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 169 [2018-11-10 07:40:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:08,542 INFO L225 Difference]: With dead ends: 247 [2018-11-10 07:40:08,542 INFO L226 Difference]: Without dead ends: 175 [2018-11-10 07:40:08,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-11-10 07:40:08,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-11-10 07:40:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2018-11-10 07:40:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-11-10 07:40:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-11-10 07:40:08,546 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 169 [2018-11-10 07:40:08,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:08,546 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-11-10 07:40:08,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-11-10 07:40:08,546 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-11-10 07:40:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-10 07:40:08,547 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:08,547 INFO L375 BasicCegarLoop]: trace histogram [73, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:08,547 INFO L424 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:08,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash 819404956, now seen corresponding path program 37 times [2018-11-10 07:40:08,548 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:08,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:08,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:08,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:08,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2698 proven. 1406 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2018-11-10 07:40:09,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:09,071 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:09,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:40:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:09,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2698 proven. 1406 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2018-11-10 07:40:09,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:09,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-11-10 07:40:09,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-11-10 07:40:09,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-11-10 07:40:09,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-11-10 07:40:09,133 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 49 states. [2018-11-10 07:40:09,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:09,220 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2018-11-10 07:40:09,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-10 07:40:09,220 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 173 [2018-11-10 07:40:09,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:09,221 INFO L225 Difference]: With dead ends: 250 [2018-11-10 07:40:09,221 INFO L226 Difference]: Without dead ends: 176 [2018-11-10 07:40:09,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-11-10 07:40:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-11-10 07:40:09,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-11-10 07:40:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-11-10 07:40:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2018-11-10 07:40:09,225 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 173 [2018-11-10 07:40:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:09,226 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2018-11-10 07:40:09,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-11-10 07:40:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2018-11-10 07:40:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-11-10 07:40:09,226 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:09,226 INFO L375 BasicCegarLoop]: trace histogram [74, 38, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:09,227 INFO L424 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:09,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:09,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1864836391, now seen corresponding path program 38 times [2018-11-10 07:40:09,227 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:09,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:09,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:09,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:40:09,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2769 proven. 1482 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2018-11-10 07:40:09,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:09,841 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:09,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 07:40:09,879 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 07:40:09,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:40:09,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2769 proven. 1482 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2018-11-10 07:40:09,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:09,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-11-10 07:40:09,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-10 07:40:09,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-10 07:40:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-11-10 07:40:09,914 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 50 states. [2018-11-10 07:40:10,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:10,035 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2018-11-10 07:40:10,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-10 07:40:10,036 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 175 [2018-11-10 07:40:10,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:10,036 INFO L225 Difference]: With dead ends: 252 [2018-11-10 07:40:10,036 INFO L226 Difference]: Without dead ends: 178 [2018-11-10 07:40:10,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-11-10 07:40:10,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-11-10 07:40:10,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-11-10 07:40:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-11-10 07:40:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2018-11-10 07:40:10,040 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 175 [2018-11-10 07:40:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:10,040 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2018-11-10 07:40:10,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-10 07:40:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2018-11-10 07:40:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-10 07:40:10,041 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:10,041 INFO L375 BasicCegarLoop]: trace histogram [75, 39, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:10,042 INFO L424 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:10,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:10,042 INFO L82 PathProgramCache]: Analyzing trace with hash -145425962, now seen corresponding path program 39 times [2018-11-10 07:40:10,042 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:10,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:10,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:10,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:10,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2840 proven. 1560 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2018-11-10 07:40:10,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:10,605 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:10,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 07:40:10,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 74 check-sat command(s) [2018-11-10 07:40:10,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:40:10,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2847 proven. 1296 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-11-10 07:40:11,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:11,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 39] total 88 [2018-11-10 07:40:11,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-11-10 07:40:11,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-11-10 07:40:11,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-11-10 07:40:11,811 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 88 states. [2018-11-10 07:40:12,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:12,007 INFO L93 Difference]: Finished difference Result 257 states and 260 transitions. [2018-11-10 07:40:12,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-11-10 07:40:12,007 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 177 [2018-11-10 07:40:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:12,008 INFO L225 Difference]: With dead ends: 257 [2018-11-10 07:40:12,008 INFO L226 Difference]: Without dead ends: 183 [2018-11-10 07:40:12,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-11-10 07:40:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-11-10 07:40:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2018-11-10 07:40:12,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-11-10 07:40:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2018-11-10 07:40:12,011 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 177 [2018-11-10 07:40:12,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:12,011 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2018-11-10 07:40:12,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-11-10 07:40:12,011 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2018-11-10 07:40:12,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-11-10 07:40:12,011 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:12,011 INFO L375 BasicCegarLoop]: trace histogram [77, 40, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:12,011 INFO L424 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:12,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:12,012 INFO L82 PathProgramCache]: Analyzing trace with hash -223007187, now seen corresponding path program 40 times [2018-11-10 07:40:12,012 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:12,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:12,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:12,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:12,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2993 proven. 1640 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2018-11-10 07:40:12,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:12,581 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:12,586 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 07:40:12,613 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 07:40:12,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:40:12,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2993 proven. 1640 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2018-11-10 07:40:12,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:12,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-11-10 07:40:12,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-10 07:40:12,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-10 07:40:12,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-10 07:40:12,649 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 52 states. [2018-11-10 07:40:12,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:12,759 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-11-10 07:40:12,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-10 07:40:12,759 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 181 [2018-11-10 07:40:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:12,760 INFO L225 Difference]: With dead ends: 260 [2018-11-10 07:40:12,760 INFO L226 Difference]: Without dead ends: 184 [2018-11-10 07:40:12,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-10 07:40:12,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-11-10 07:40:12,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-11-10 07:40:12,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-11-10 07:40:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2018-11-10 07:40:12,763 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 181 [2018-11-10 07:40:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:12,763 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2018-11-10 07:40:12,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-10 07:40:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2018-11-10 07:40:12,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-11-10 07:40:12,763 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:12,764 INFO L375 BasicCegarLoop]: trace histogram [78, 41, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:12,764 INFO L424 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:12,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:12,764 INFO L82 PathProgramCache]: Analyzing trace with hash -827630742, now seen corresponding path program 41 times [2018-11-10 07:40:12,764 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:12,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:12,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:12,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:12,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 3081 proven. 1521 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-11-10 07:40:13,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:13,175 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:13,179 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 07:40:13,251 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-11-10 07:40:13,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:40:13,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 3080 proven. 1444 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-11-10 07:40:13,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:13,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 42 [2018-11-10 07:40:13,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-10 07:40:13,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-10 07:40:13,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-10 07:40:13,283 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 42 states. [2018-11-10 07:40:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:13,349 INFO L93 Difference]: Finished difference Result 194 states and 197 transitions. [2018-11-10 07:40:13,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-10 07:40:13,350 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 183 [2018-11-10 07:40:13,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:13,350 INFO L225 Difference]: With dead ends: 194 [2018-11-10 07:40:13,350 INFO L226 Difference]: Without dead ends: 191 [2018-11-10 07:40:13,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-10 07:40:13,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-11-10 07:40:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2018-11-10 07:40:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-11-10 07:40:13,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2018-11-10 07:40:13,355 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 183 [2018-11-10 07:40:13,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:13,356 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2018-11-10 07:40:13,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-10 07:40:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2018-11-10 07:40:13,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-11-10 07:40:13,356 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:13,357 INFO L375 BasicCegarLoop]: trace histogram [81, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:13,357 INFO L424 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:13,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:13,357 INFO L82 PathProgramCache]: Analyzing trace with hash 65889400, now seen corresponding path program 42 times [2018-11-10 07:40:13,357 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:13,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:13,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:13,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:13,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 3315 proven. 1764 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-11-10 07:40:13,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:13,833 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:13,838 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 07:40:13,925 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2018-11-10 07:40:13,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:40:13,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:40:14,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:14,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 93] total 95 [2018-11-10 07:40:14,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-11-10 07:40:14,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-11-10 07:40:14,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-11-10 07:40:14,562 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 95 states. [2018-11-10 07:40:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:14,763 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2018-11-10 07:40:14,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-11-10 07:40:14,763 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 189 [2018-11-10 07:40:14,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:14,764 INFO L225 Difference]: With dead ends: 200 [2018-11-10 07:40:14,764 INFO L226 Difference]: Without dead ends: 197 [2018-11-10 07:40:14,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4200 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-11-10 07:40:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-11-10 07:40:14,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2018-11-10 07:40:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-11-10 07:40:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2018-11-10 07:40:14,769 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 189 [2018-11-10 07:40:14,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:14,769 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2018-11-10 07:40:14,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-11-10 07:40:14,770 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2018-11-10 07:40:14,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-11-10 07:40:14,770 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:14,770 INFO L375 BasicCegarLoop]: trace histogram [84, 43, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:14,770 INFO L424 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:14,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:14,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1134826746, now seen corresponding path program 43 times [2018-11-10 07:40:14,771 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:14,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:14,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:14,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:14,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 3549 proven. 2025 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-11-10 07:40:15,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:15,276 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:15,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:40:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:15,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:40:15,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:15,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 96] total 98 [2018-11-10 07:40:15,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-11-10 07:40:15,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-11-10 07:40:15,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-11-10 07:40:15,957 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand 98 states. [2018-11-10 07:40:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:16,191 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2018-11-10 07:40:16,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-11-10 07:40:16,191 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 195 [2018-11-10 07:40:16,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:16,192 INFO L225 Difference]: With dead ends: 206 [2018-11-10 07:40:16,192 INFO L226 Difference]: Without dead ends: 203 [2018-11-10 07:40:16,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4500 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-11-10 07:40:16,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-11-10 07:40:16,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2018-11-10 07:40:16,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-11-10 07:40:16,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2018-11-10 07:40:16,196 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 195 [2018-11-10 07:40:16,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:16,197 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2018-11-10 07:40:16,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-11-10 07:40:16,197 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2018-11-10 07:40:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-11-10 07:40:16,198 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:16,198 INFO L375 BasicCegarLoop]: trace histogram [87, 46, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:16,198 INFO L424 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:16,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:16,198 INFO L82 PathProgramCache]: Analyzing trace with hash -989671660, now seen corresponding path program 44 times [2018-11-10 07:40:16,198 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:16,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:16,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:16,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:40:16,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3783 proven. 2304 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-11-10 07:40:16,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:16,783 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:16,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 07:40:16,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 07:40:16,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:40:16,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:40:17,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:17,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 99] total 101 [2018-11-10 07:40:17,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-11-10 07:40:17,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-11-10 07:40:17,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-11-10 07:40:17,452 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 101 states. [2018-11-10 07:40:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:17,673 INFO L93 Difference]: Finished difference Result 212 states and 215 transitions. [2018-11-10 07:40:17,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-11-10 07:40:17,673 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 201 [2018-11-10 07:40:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:17,674 INFO L225 Difference]: With dead ends: 212 [2018-11-10 07:40:17,674 INFO L226 Difference]: Without dead ends: 209 [2018-11-10 07:40:17,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4800 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-11-10 07:40:17,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-11-10 07:40:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2018-11-10 07:40:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-11-10 07:40:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2018-11-10 07:40:17,677 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 201 [2018-11-10 07:40:17,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:17,677 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2018-11-10 07:40:17,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-11-10 07:40:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2018-11-10 07:40:17,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-11-10 07:40:17,678 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:17,678 INFO L375 BasicCegarLoop]: trace histogram [90, 49, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:17,678 INFO L424 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:17,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:17,678 INFO L82 PathProgramCache]: Analyzing trace with hash 713420962, now seen corresponding path program 45 times [2018-11-10 07:40:17,678 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:17,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:17,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:17,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:17,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 4059 proven. 2401 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2018-11-10 07:40:18,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:18,321 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:18,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 07:40:18,439 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 91 check-sat command(s) [2018-11-10 07:40:18,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:40:18,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:40:19,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:19,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 102] total 102 [2018-11-10 07:40:19,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-11-10 07:40:19,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-11-10 07:40:19,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-11-10 07:40:19,132 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand 102 states. [2018-11-10 07:40:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:19,382 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2018-11-10 07:40:19,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-11-10 07:40:19,382 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 207 [2018-11-10 07:40:19,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:19,383 INFO L225 Difference]: With dead ends: 213 [2018-11-10 07:40:19,383 INFO L226 Difference]: Without dead ends: 210 [2018-11-10 07:40:19,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-11-10 07:40:19,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-11-10 07:40:19,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-11-10 07:40:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-11-10 07:40:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2018-11-10 07:40:19,386 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 207 [2018-11-10 07:40:19,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:19,386 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2018-11-10 07:40:19,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-11-10 07:40:19,386 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2018-11-10 07:40:19,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-11-10 07:40:19,387 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:19,387 INFO L375 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:19,387 INFO L424 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:19,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:19,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1604761220, now seen corresponding path program 46 times [2018-11-10 07:40:19,387 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:19,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:19,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:19,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:19,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-11-10 07:40:20,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:40:20,453 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:40:20,458 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 07:40:20,492 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 07:40:20,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:40:20,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:40:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-11-10 07:40:20,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:40:20,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-11-10 07:40:20,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-11-10 07:40:20,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-11-10 07:40:20,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-11-10 07:40:20,584 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 54 states. [2018-11-10 07:40:21,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:21,353 INFO L93 Difference]: Finished difference Result 216 states and 217 transitions. [2018-11-10 07:40:21,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-10 07:40:21,353 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 209 [2018-11-10 07:40:21,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:21,354 INFO L225 Difference]: With dead ends: 216 [2018-11-10 07:40:21,354 INFO L226 Difference]: Without dead ends: 213 [2018-11-10 07:40:21,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2018-11-10 07:40:21,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-11-10 07:40:21,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2018-11-10 07:40:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-11-10 07:40:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2018-11-10 07:40:21,358 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 209 [2018-11-10 07:40:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:21,358 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2018-11-10 07:40:21,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-11-10 07:40:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2018-11-10 07:40:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-11-10 07:40:21,358 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:40:21,359 INFO L375 BasicCegarLoop]: trace histogram [92, 51, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:40:21,359 INFO L424 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:40:21,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:40:21,359 INFO L82 PathProgramCache]: Analyzing trace with hash -289811498, now seen corresponding path program 47 times [2018-11-10 07:40:21,359 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:40:21,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:40:21,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:21,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:40:21,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:40:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:40:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 6742 proven. 0 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-11-10 07:40:22,037 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:40:22,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2018-11-10 07:40:22,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-10 07:40:22,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-10 07:40:22,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-10 07:40:22,038 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand 52 states. [2018-11-10 07:40:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:40:22,178 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2018-11-10 07:40:22,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-10 07:40:22,180 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 211 [2018-11-10 07:40:22,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:40:22,180 INFO L225 Difference]: With dead ends: 212 [2018-11-10 07:40:22,180 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 07:40:22,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-10 07:40:22,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 07:40:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 07:40:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 07:40:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 07:40:22,181 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 211 [2018-11-10 07:40:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:40:22,181 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 07:40:22,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-10 07:40:22,181 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 07:40:22,181 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 07:40:22,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 07:40:22,926 WARN L179 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 307 [2018-11-10 07:40:22,940 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-11-10 07:40:22,940 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-11-10 07:40:22,940 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 07:40:22,940 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 07:40:22,940 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 07:40:22,940 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 07:40:22,940 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 07:40:22,940 INFO L425 ceAbstractionStarter]: For program point L89(lines 89 98) no Hoare annotation was computed. [2018-11-10 07:40:22,941 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 8 209) no Hoare annotation was computed. [2018-11-10 07:40:22,941 INFO L425 ceAbstractionStarter]: For program point L56(lines 56 119) no Hoare annotation was computed. [2018-11-10 07:40:22,941 INFO L421 ceAbstractionStarter]: At program point L118(lines 56 119) the Hoare annotation is: (and (<= main_~main__y~0 50) (<= main_~main__x~0 8) (<= 50 main_~main__y~0)) [2018-11-10 07:40:22,941 INFO L425 ceAbstractionStarter]: For program point L44(lines 44 143) no Hoare annotation was computed. [2018-11-10 07:40:22,942 INFO L421 ceAbstractionStarter]: At program point L106(lines 62 107) the Hoare annotation is: (or (and (<= 56 main_~main__x~0) (<= main_~main__y~0 56) (<= main_~main__x~0 56) (<= 56 main_~main__y~0)) (and (<= 61 main_~main__y~0) (<= 61 main_~main__x~0) (<= main_~main__y~0 61) (<= main_~main__x~0 61)) (and (<= main_~main__x~0 91) (<= 91 main_~main__x~0) (<= main_~main__y~0 91) (<= 91 main_~main__y~0)) (and (<= 57 main_~main__y~0) (<= main_~main__y~0 57) (<= 57 main_~main__x~0) (<= main_~main__x~0 57)) (and (<= 59 main_~main__x~0) (<= main_~main__y~0 59) (<= main_~main__x~0 59) (<= 59 main_~main__y~0)) (and (<= main_~main__y~0 74) (<= 74 main_~main__y~0) (<= main_~main__x~0 74) (<= 74 main_~main__x~0)) (and (<= 75 main_~main__y~0) (<= main_~main__x~0 75) (<= 75 main_~main__x~0) (<= main_~main__y~0 75)) (and (<= main_~main__x~0 58) (<= main_~main__y~0 58) (<= 58 main_~main__x~0) (<= 58 main_~main__y~0)) (and (<= 72 main_~main__x~0) (<= main_~main__y~0 72) (<= 72 main_~main__y~0) (<= main_~main__x~0 72)) (and (<= main_~main__x~0 82) (<= 82 main_~main__x~0) (<= main_~main__y~0 82) (<= 82 main_~main__y~0)) (and (<= main_~main__y~0 64) (<= main_~main__x~0 64) (<= 64 main_~main__x~0) (<= 64 main_~main__y~0)) (and (<= main_~main__y~0 53) (<= 53 main_~main__y~0) (<= main_~main__x~0 53) (<= 53 main_~main__x~0)) (and (<= 89 main_~main__y~0) (<= main_~main__y~0 89) (<= main_~main__x~0 89) (<= 89 main_~main__x~0)) (and (<= main_~main__y~0 90) (<= 90 main_~main__y~0) (<= 90 main_~main__x~0) (<= main_~main__x~0 90)) (and (<= 87 main_~main__x~0) (<= main_~main__y~0 87) (<= main_~main__x~0 87) (<= 87 main_~main__y~0)) (and (<= main_~main__x~0 78) (<= main_~main__y~0 78) (<= 78 main_~main__x~0) (<= 78 main_~main__y~0)) (and (<= main_~main__x~0 95) (<= main_~main__y~0 95) (<= 95 main_~main__x~0) (<= 95 main_~main__y~0)) (and (<= main_~main__y~0 77) (<= 77 main_~main__y~0) (<= main_~main__x~0 77) (<= 77 main_~main__x~0)) (and (<= 55 main_~main__y~0) (<= main_~main__x~0 55) (<= main_~main__y~0 55) (<= 55 main_~main__x~0)) (and (<= 63 main_~main__x~0) (<= main_~main__y~0 63) (<= main_~main__x~0 63) (<= 63 main_~main__y~0)) (and (<= 76 main_~main__x~0) (<= main_~main__x~0 76) (<= main_~main__y~0 76) (<= 76 main_~main__y~0)) (and (<= main_~main__y~0 100) (<= 100 main_~main__x~0) (<= 100 main_~main__y~0)) (and (<= 79 main_~main__x~0) (<= 79 main_~main__y~0) (<= main_~main__x~0 79) (<= main_~main__y~0 79)) (and (<= main_~main__x~0 80) (<= main_~main__y~0 80) (<= 80 main_~main__x~0) (<= 80 main_~main__y~0)) (and (<= main_~main__y~0 54) (<= 54 main_~main__y~0) (<= 54 main_~main__x~0) (<= main_~main__x~0 54)) (and (<= main_~main__x~0 73) (<= 73 main_~main__x~0) (<= main_~main__y~0 73) (<= 73 main_~main__y~0)) (and (<= main_~main__x~0 52) (<= main_~main__y~0 52) (<= 52 main_~main__y~0) (<= 52 main_~main__x~0)) (and (<= main_~main__x~0 93) (<= main_~main__y~0 93) (<= 93 main_~main__y~0) (<= 93 main_~main__x~0)) (and (<= main_~main__y~0 97) (<= 97 main_~main__x~0) (<= 97 main_~main__y~0) (<= main_~main__x~0 97)) (and (<= main_~main__x~0 94) (<= 94 main_~main__x~0) (<= main_~main__y~0 94) (<= 94 main_~main__y~0)) (and (<= 70 main_~main__x~0) (<= main_~main__y~0 70) (<= main_~main__x~0 70) (<= 70 main_~main__y~0)) (and (<= main_~main__y~0 65) (<= 65 main_~main__y~0) (<= main_~main__x~0 65) (<= 65 main_~main__x~0)) (and (<= main_~main__y~0 84) (<= 84 main_~main__y~0) (<= 84 main_~main__x~0) (<= main_~main__x~0 84)) (and (<= main_~main__x~0 66) (<= main_~main__y~0 66) (<= 66 main_~main__y~0) (<= 66 main_~main__x~0)) (and (<= main_~main__x~0 60) (<= 60 main_~main__x~0) (<= 60 main_~main__y~0) (<= main_~main__y~0 60)) (and (<= main_~main__x~0 69) (<= main_~main__y~0 69) (<= 69 main_~main__y~0) (<= 69 main_~main__x~0)) (and (<= main_~main__y~0 71) (<= 71 main_~main__y~0) (<= 71 main_~main__x~0) (<= main_~main__x~0 71)) (and (<= main_~main__y~0 50) (<= 50 main_~main__y~0) (<= main_~main__x~0 50)) (and (<= 62 main_~main__y~0) (<= main_~main__y~0 62) (<= 62 main_~main__x~0) (<= main_~main__x~0 62)) (and (<= main_~main__y~0 68) (<= 68 main_~main__x~0) (<= main_~main__x~0 68) (<= 68 main_~main__y~0)) (and (<= main_~main__x~0 99) (<= 99 main_~main__x~0) (<= main_~main__y~0 99) (<= 99 main_~main__y~0)) (and (<= main_~main__x~0 81) (<= main_~main__y~0 81) (<= 81 main_~main__x~0) (<= 81 main_~main__y~0)) (and (<= main_~main__x~0 96) (<= main_~main__y~0 96) (<= 96 main_~main__y~0) (<= 96 main_~main__x~0)) (and (<= main_~main__y~0 98) (<= 98 main_~main__y~0) (<= main_~main__x~0 98) (<= 98 main_~main__x~0)) (and (<= 86 main_~main__x~0) (<= main_~main__x~0 86) (<= main_~main__y~0 86) (<= 86 main_~main__y~0)) (and (<= 51 main_~main__y~0) (<= main_~main__x~0 51) (<= 51 main_~main__x~0) (<= main_~main__y~0 51)) (and (<= 85 main_~main__y~0) (<= main_~main__x~0 85) (<= 85 main_~main__x~0) (<= main_~main__y~0 85)) (and (<= main_~main__x~0 92) (<= 92 main_~main__x~0) (<= main_~main__y~0 92) (<= 92 main_~main__y~0)) (and (<= main_~main__x~0 67) (<= 67 main_~main__x~0) (<= main_~main__y~0 67) (<= 67 main_~main__y~0)) (and (<= main_~main__x~0 88) (<= 88 main_~main__x~0) (<= main_~main__y~0 88) (<= 88 main_~main__y~0)) (and (<= main_~main__y~0 83) (<= main_~main__x~0 83) (<= 83 main_~main__x~0) (<= 83 main_~main__y~0))) [2018-11-10 07:40:22,942 INFO L425 ceAbstractionStarter]: For program point L69(lines 69 80) no Hoare annotation was computed. [2018-11-10 07:40:22,942 INFO L425 ceAbstractionStarter]: For program point L32(lines 32 167) no Hoare annotation was computed. [2018-11-10 07:40:22,942 INFO L425 ceAbstractionStarter]: For program point L20(lines 20 191) no Hoare annotation was computed. [2018-11-10 07:40:22,942 INFO L425 ceAbstractionStarter]: For program point L12(lines 12 208) no Hoare annotation was computed. [2018-11-10 07:40:22,942 INFO L421 ceAbstractionStarter]: At program point L202(lines 14 203) the Hoare annotation is: (and (<= main_~main__y~0 50) (<= 50 main_~main__y~0) (<= main_~main__x~0 1)) [2018-11-10 07:40:22,943 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2018-11-10 07:40:22,943 INFO L425 ceAbstractionStarter]: For program point L62(lines 62 107) no Hoare annotation was computed. [2018-11-10 07:40:22,943 INFO L421 ceAbstractionStarter]: At program point L190(lines 20 191) the Hoare annotation is: (and (<= main_~main__y~0 50) (<= 50 main_~main__y~0) (<= main_~main__x~0 2)) [2018-11-10 07:40:22,943 INFO L425 ceAbstractionStarter]: For program point L91(line 91) no Hoare annotation was computed. [2018-11-10 07:40:22,943 INFO L425 ceAbstractionStarter]: For program point L50(lines 50 131) no Hoare annotation was computed. [2018-11-10 07:40:22,943 INFO L421 ceAbstractionStarter]: At program point L178(lines 26 179) the Hoare annotation is: (and (<= main_~main__y~0 50) (<= 50 main_~main__y~0) (<= main_~main__x~0 3)) [2018-11-10 07:40:22,943 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 8 209) no Hoare annotation was computed. [2018-11-10 07:40:22,943 INFO L425 ceAbstractionStarter]: For program point L38(lines 38 155) no Hoare annotation was computed. [2018-11-10 07:40:22,943 INFO L421 ceAbstractionStarter]: At program point L166(lines 32 167) the Hoare annotation is: (and (<= main_~main__x~0 4) (<= main_~main__y~0 50) (<= 50 main_~main__y~0)) [2018-11-10 07:40:22,943 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 8 209) the Hoare annotation is: true [2018-11-10 07:40:22,943 INFO L425 ceAbstractionStarter]: For program point L26(lines 26 179) no Hoare annotation was computed. [2018-11-10 07:40:22,943 INFO L421 ceAbstractionStarter]: At program point L154(lines 38 155) the Hoare annotation is: (and (<= main_~main__y~0 50) (<= main_~main__x~0 5) (<= 50 main_~main__y~0)) [2018-11-10 07:40:22,943 INFO L425 ceAbstractionStarter]: For program point L14(lines 14 203) no Hoare annotation was computed. [2018-11-10 07:40:22,943 INFO L421 ceAbstractionStarter]: At program point L142(lines 44 143) the Hoare annotation is: (and (<= main_~main__y~0 50) (<= 50 main_~main__y~0) (<= main_~main__x~0 6)) [2018-11-10 07:40:22,943 INFO L421 ceAbstractionStarter]: At program point L130(lines 50 131) the Hoare annotation is: (and (<= main_~main__y~0 50) (<= main_~main__x~0 7) (<= 50 main_~main__y~0)) [2018-11-10 07:40:22,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 07:40:22 BoogieIcfgContainer [2018-11-10 07:40:22,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 07:40:22,964 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 07:40:22,965 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 07:40:22,965 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 07:40:22,966 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:39:41" (3/4) ... [2018-11-10 07:40:22,971 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 07:40:22,977 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 07:40:22,978 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 07:40:22,981 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-11-10 07:40:22,981 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-10 07:40:23,017 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f713ff16-2c32-4766-a9b8-f7dfafc536e7/bin-2019/uautomizer/witness.graphml [2018-11-10 07:40:23,017 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 07:40:23,017 INFO L168 Benchmark]: Toolchain (without parser) took 41591.05 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 770.7 MB). Free memory was 960.2 MB in the beginning and 1.4 GB in the end (delta: -442.9 MB). Peak memory consumption was 327.8 MB. Max. memory is 11.5 GB. [2018-11-10 07:40:23,018 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 07:40:23,018 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.30 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 948.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-10 07:40:23,018 INFO L168 Benchmark]: Boogie Preprocessor took 18.02 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 07:40:23,018 INFO L168 Benchmark]: RCFGBuilder took 234.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.2 MB). Free memory was 945.7 MB in the beginning and 1.2 GB in the end (delta: -204.4 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2018-11-10 07:40:23,019 INFO L168 Benchmark]: TraceAbstraction took 41112.83 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 603.5 MB). Free memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: -253.0 MB). Peak memory consumption was 350.5 MB. Max. memory is 11.5 GB. [2018-11-10 07:40:23,019 INFO L168 Benchmark]: Witness Printer took 53.05 ms. Allocated memory is still 1.8 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 07:40:23,019 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 169.30 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 948.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.02 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 234.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.2 MB). Free memory was 945.7 MB in the beginning and 1.2 GB in the end (delta: -204.4 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 41112.83 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 603.5 MB). Free memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: -253.0 MB). Peak memory consumption was 350.5 MB. Max. memory is 11.5 GB. * Witness Printer took 53.05 ms. Allocated memory is still 1.8 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (main__x <= 4 && main__y <= 50) && 50 <= main__y - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 8) && 50 <= main__y - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (main__y <= 50 && 50 <= main__y) && main__x <= 3 - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 7) && 50 <= main__y - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (main__y <= 50 && 50 <= main__y) && main__x <= 2 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (main__y <= 50 && 50 <= main__y) && main__x <= 6 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (main__y <= 50 && 50 <= main__y) && main__x <= 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 5) && 50 <= main__y - InvariantResult [Line: 62]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((56 <= main__x && main__y <= 56) && main__x <= 56) && 56 <= main__y) || (((61 <= main__y && 61 <= main__x) && main__y <= 61) && main__x <= 61)) || (((main__x <= 91 && 91 <= main__x) && main__y <= 91) && 91 <= main__y)) || (((57 <= main__y && main__y <= 57) && 57 <= main__x) && main__x <= 57)) || (((59 <= main__x && main__y <= 59) && main__x <= 59) && 59 <= main__y)) || (((main__y <= 74 && 74 <= main__y) && main__x <= 74) && 74 <= main__x)) || (((75 <= main__y && main__x <= 75) && 75 <= main__x) && main__y <= 75)) || (((main__x <= 58 && main__y <= 58) && 58 <= main__x) && 58 <= main__y)) || (((72 <= main__x && main__y <= 72) && 72 <= main__y) && main__x <= 72)) || (((main__x <= 82 && 82 <= main__x) && main__y <= 82) && 82 <= main__y)) || (((main__y <= 64 && main__x <= 64) && 64 <= main__x) && 64 <= main__y)) || (((main__y <= 53 && 53 <= main__y) && main__x <= 53) && 53 <= main__x)) || (((89 <= main__y && main__y <= 89) && main__x <= 89) && 89 <= main__x)) || (((main__y <= 90 && 90 <= main__y) && 90 <= main__x) && main__x <= 90)) || (((87 <= main__x && main__y <= 87) && main__x <= 87) && 87 <= main__y)) || (((main__x <= 78 && main__y <= 78) && 78 <= main__x) && 78 <= main__y)) || (((main__x <= 95 && main__y <= 95) && 95 <= main__x) && 95 <= main__y)) || (((main__y <= 77 && 77 <= main__y) && main__x <= 77) && 77 <= main__x)) || (((55 <= main__y && main__x <= 55) && main__y <= 55) && 55 <= main__x)) || (((63 <= main__x && main__y <= 63) && main__x <= 63) && 63 <= main__y)) || (((76 <= main__x && main__x <= 76) && main__y <= 76) && 76 <= main__y)) || ((main__y <= 100 && 100 <= main__x) && 100 <= main__y)) || (((79 <= main__x && 79 <= main__y) && main__x <= 79) && main__y <= 79)) || (((main__x <= 80 && main__y <= 80) && 80 <= main__x) && 80 <= main__y)) || (((main__y <= 54 && 54 <= main__y) && 54 <= main__x) && main__x <= 54)) || (((main__x <= 73 && 73 <= main__x) && main__y <= 73) && 73 <= main__y)) || (((main__x <= 52 && main__y <= 52) && 52 <= main__y) && 52 <= main__x)) || (((main__x <= 93 && main__y <= 93) && 93 <= main__y) && 93 <= main__x)) || (((main__y <= 97 && 97 <= main__x) && 97 <= main__y) && main__x <= 97)) || (((main__x <= 94 && 94 <= main__x) && main__y <= 94) && 94 <= main__y)) || (((70 <= main__x && main__y <= 70) && main__x <= 70) && 70 <= main__y)) || (((main__y <= 65 && 65 <= main__y) && main__x <= 65) && 65 <= main__x)) || (((main__y <= 84 && 84 <= main__y) && 84 <= main__x) && main__x <= 84)) || (((main__x <= 66 && main__y <= 66) && 66 <= main__y) && 66 <= main__x)) || (((main__x <= 60 && 60 <= main__x) && 60 <= main__y) && main__y <= 60)) || (((main__x <= 69 && main__y <= 69) && 69 <= main__y) && 69 <= main__x)) || (((main__y <= 71 && 71 <= main__y) && 71 <= main__x) && main__x <= 71)) || ((main__y <= 50 && 50 <= main__y) && main__x <= 50)) || (((62 <= main__y && main__y <= 62) && 62 <= main__x) && main__x <= 62)) || (((main__y <= 68 && 68 <= main__x) && main__x <= 68) && 68 <= main__y)) || (((main__x <= 99 && 99 <= main__x) && main__y <= 99) && 99 <= main__y)) || (((main__x <= 81 && main__y <= 81) && 81 <= main__x) && 81 <= main__y)) || (((main__x <= 96 && main__y <= 96) && 96 <= main__y) && 96 <= main__x)) || (((main__y <= 98 && 98 <= main__y) && main__x <= 98) && 98 <= main__x)) || (((86 <= main__x && main__x <= 86) && main__y <= 86) && 86 <= main__y)) || (((51 <= main__y && main__x <= 51) && 51 <= main__x) && main__y <= 51)) || (((85 <= main__y && main__x <= 85) && 85 <= main__x) && main__y <= 85)) || (((main__x <= 92 && 92 <= main__x) && main__y <= 92) && 92 <= main__y)) || (((main__x <= 67 && 67 <= main__x) && main__y <= 67) && 67 <= main__y)) || (((main__x <= 88 && 88 <= main__x) && main__y <= 88) && 88 <= main__y)) || (((main__y <= 83 && main__x <= 83) && 83 <= main__x) && 83 <= main__y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 33 locations, 1 error locations. SAFE Result, 41.0s OverallTime, 54 OverallIterations, 92 TraceHistogramMax, 6.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.7s HoareAnnotationTime, HoareTripleCheckerStatistics: 666 SDtfs, 2024 SDslu, 9243 SDs, 0 SdLazy, 13324 SolverSat, 2190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7552 GetRequests, 5371 SyntacticMatches, 1 SemanticMatches, 2180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18400 ImplicationChecksByTransitivity, 27.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=53, 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: 0.2s AutomataMinimizationTime, 54 MinimizatonAttempts, 20 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 13 PreInvPairs, 113 NumberOfFragments, 742 HoareAnnotationTreeSize, 13 FomulaSimplifications, 533 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 13 FomulaSimplificationsInter, 171 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 29.0s InterpolantComputationTime, 12206 NumberOfCodeBlocks, 12146 NumberOfCodeBlocksAsserted, 1208 NumberOfCheckSat, 12106 ConstructedInterpolants, 0 QuantifiedInterpolants, 4099036 SizeOfPredicates, 23 NumberOfNonLiveVariables, 14904 ConjunctsInSsa, 1753 ConjunctsInUnsatCore, 100 InterpolantComputations, 8 PerfectInterpolantSequences, 200593/303161 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...