./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-industry-pattern/nested_true-unreach-call.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_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/nested_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 61b7d6607ccac63dcd99f2b87de00fb6f01869a1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 03:47:00,961 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 03:47:00,962 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 03:47:00,971 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 03:47:00,971 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 03:47:00,972 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 03:47:00,973 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 03:47:00,974 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 03:47:00,975 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 03:47:00,976 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 03:47:00,976 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 03:47:00,976 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 03:47:00,977 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 03:47:00,978 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 03:47:00,979 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 03:47:00,979 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 03:47:00,980 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 03:47:00,981 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 03:47:00,982 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 03:47:00,984 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 03:47:00,984 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 03:47:00,985 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 03:47:00,987 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 03:47:00,987 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 03:47:00,987 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 03:47:00,988 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 03:47:00,989 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 03:47:00,989 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 03:47:00,990 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 03:47:00,990 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 03:47:00,991 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 03:47:00,991 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 03:47:00,991 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 03:47:00,991 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 03:47:00,992 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 03:47:00,993 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 03:47:00,993 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 03:47:01,002 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 03:47:01,003 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 03:47:01,003 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 03:47:01,004 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 03:47:01,004 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 03:47:01,004 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 03:47:01,004 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 03:47:01,004 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 03:47:01,005 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 03:47:01,005 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 03:47:01,005 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 03:47:01,005 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 03:47:01,005 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 03:47:01,005 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 03:47:01,005 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 03:47:01,006 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 03:47:01,006 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 03:47:01,006 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 03:47:01,006 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 03:47:01,006 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 03:47:01,006 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 03:47:01,006 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 03:47:01,007 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 03:47:01,007 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 03:47:01,007 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 03:47:01,007 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 03:47:01,007 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 03:47:01,007 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 03:47:01,007 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 03:47:01,008 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_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 -> 61b7d6607ccac63dcd99f2b87de00fb6f01869a1 [2018-11-10 03:47:01,030 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 03:47:01,039 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 03:47:01,042 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 03:47:01,043 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 03:47:01,043 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 03:47:01,044 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/bin-2019/uautomizer/../../sv-benchmarks/c/loop-industry-pattern/nested_true-unreach-call.c [2018-11-10 03:47:01,089 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/bin-2019/uautomizer/data/ea4f5c955/b480eb1594fc4bf1a431d287b302cb71/FLAG1616b2ab1 [2018-11-10 03:47:01,436 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 03:47:01,437 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/sv-benchmarks/c/loop-industry-pattern/nested_true-unreach-call.c [2018-11-10 03:47:01,442 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/bin-2019/uautomizer/data/ea4f5c955/b480eb1594fc4bf1a431d287b302cb71/FLAG1616b2ab1 [2018-11-10 03:47:01,453 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/bin-2019/uautomizer/data/ea4f5c955/b480eb1594fc4bf1a431d287b302cb71 [2018-11-10 03:47:01,455 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 03:47:01,456 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 03:47:01,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 03:47:01,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 03:47:01,460 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 03:47:01,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 03:47:01" (1/1) ... [2018-11-10 03:47:01,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@549999d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:47:01, skipping insertion in model container [2018-11-10 03:47:01,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 03:47:01" (1/1) ... [2018-11-10 03:47:01,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 03:47:01,483 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 03:47:01,583 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 03:47:01,585 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 03:47:01,596 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 03:47:01,604 INFO L193 MainTranslator]: Completed translation [2018-11-10 03:47:01,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:47:01 WrapperNode [2018-11-10 03:47:01,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 03:47:01,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 03:47:01,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 03:47:01,605 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 03:47:01,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:47:01" (1/1) ... [2018-11-10 03:47:01,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:47:01" (1/1) ... [2018-11-10 03:47:01,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:47:01" (1/1) ... [2018-11-10 03:47:01,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:47:01" (1/1) ... [2018-11-10 03:47:01,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:47:01" (1/1) ... [2018-11-10 03:47:01,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:47:01" (1/1) ... [2018-11-10 03:47:01,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:47:01" (1/1) ... [2018-11-10 03:47:01,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 03:47:01,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 03:47:01,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 03:47:01,621 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 03:47:01,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:47:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:01,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 03:47:01,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 03:47:01,690 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 03:47:01,690 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet [2018-11-10 03:47:01,690 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 03:47:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 03:47:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 03:47:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure nondet [2018-11-10 03:47:01,691 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 03:47:01,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 03:47:01,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 03:47:01,795 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 03:47:01,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 03:47:01 BoogieIcfgContainer [2018-11-10 03:47:01,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 03:47:01,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 03:47:01,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 03:47:01,799 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 03:47:01,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 03:47:01" (1/3) ... [2018-11-10 03:47:01,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22401fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 03:47:01, skipping insertion in model container [2018-11-10 03:47:01,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:47:01" (2/3) ... [2018-11-10 03:47:01,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22401fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 03:47:01, skipping insertion in model container [2018-11-10 03:47:01,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 03:47:01" (3/3) ... [2018-11-10 03:47:01,801 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call.c [2018-11-10 03:47:01,809 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 03:47:01,815 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 03:47:01,826 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 03:47:01,843 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 03:47:01,844 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 03:47:01,844 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 03:47:01,844 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 03:47:01,844 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 03:47:01,844 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 03:47:01,844 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 03:47:01,844 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 03:47:01,844 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 03:47:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-11-10 03:47:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 03:47:01,857 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:01,858 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:01,859 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:01,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:01,862 INFO L82 PathProgramCache]: Analyzing trace with hash 11016370, now seen corresponding path program 1 times [2018-11-10 03:47:01,863 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:01,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:01,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:01,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:01,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:01,935 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 03:47:01,937 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 03:47:01,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 03:47:01,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 03:47:01,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 03:47:01,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 03:47:01,949 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-11-10 03:47:01,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:01,963 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2018-11-10 03:47:01,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 03:47:01,964 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-11-10 03:47:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:01,971 INFO L225 Difference]: With dead ends: 44 [2018-11-10 03:47:01,971 INFO L226 Difference]: Without dead ends: 25 [2018-11-10 03:47:01,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 03:47:01,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-10 03:47:01,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-10 03:47:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-10 03:47:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2018-11-10 03:47:01,995 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2018-11-10 03:47:01,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:01,996 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2018-11-10 03:47:01,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 03:47:01,996 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2018-11-10 03:47:01,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-10 03:47:01,996 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:01,997 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] [2018-11-10 03:47:01,997 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:01,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:01,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1033619079, now seen corresponding path program 1 times [2018-11-10 03:47:01,997 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:01,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:01,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:01,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:01,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:02,040 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 03:47:02,040 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 03:47:02,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 03:47:02,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 03:47:02,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 03:47:02,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 03:47:02,042 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2018-11-10 03:47:02,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:02,073 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2018-11-10 03:47:02,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 03:47:02,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2018-11-10 03:47:02,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:02,075 INFO L225 Difference]: With dead ends: 46 [2018-11-10 03:47:02,075 INFO L226 Difference]: Without dead ends: 31 [2018-11-10 03:47:02,076 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 03:47:02,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-10 03:47:02,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-11-10 03:47:02,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-10 03:47:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2018-11-10 03:47:02,080 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2018-11-10 03:47:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:02,080 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-11-10 03:47:02,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 03:47:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2018-11-10 03:47:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-10 03:47:02,081 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:02,081 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] [2018-11-10 03:47:02,081 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:02,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:02,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1253934194, now seen corresponding path program 1 times [2018-11-10 03:47:02,081 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:02,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:02,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:02,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:02,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:02,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:02,126 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:02,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:02,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 03:47:02,196 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 03:47:02,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-11-10 03:47:02,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 03:47:02,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 03:47:02,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-10 03:47:02,197 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2018-11-10 03:47:02,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:02,286 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2018-11-10 03:47:02,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 03:47:02,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2018-11-10 03:47:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:02,288 INFO L225 Difference]: With dead ends: 66 [2018-11-10 03:47:02,288 INFO L226 Difference]: Without dead ends: 49 [2018-11-10 03:47:02,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-11-10 03:47:02,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-10 03:47:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2018-11-10 03:47:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-10 03:47:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2018-11-10 03:47:02,297 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2018-11-10 03:47:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:02,298 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2018-11-10 03:47:02,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 03:47:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2018-11-10 03:47:02,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-10 03:47:02,298 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:02,299 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:02,299 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:02,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:02,299 INFO L82 PathProgramCache]: Analyzing trace with hash -464320941, now seen corresponding path program 1 times [2018-11-10 03:47:02,299 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:02,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:02,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:02,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:02,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:02,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:02,341 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:02,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:02,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:02,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:02,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-10 03:47:02,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 03:47:02,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 03:47:02,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 03:47:02,392 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 5 states. [2018-11-10 03:47:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:02,437 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2018-11-10 03:47:02,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 03:47:02,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-11-10 03:47:02,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:02,438 INFO L225 Difference]: With dead ends: 84 [2018-11-10 03:47:02,438 INFO L226 Difference]: Without dead ends: 54 [2018-11-10 03:47:02,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 03:47:02,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-10 03:47:02,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2018-11-10 03:47:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-10 03:47:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2018-11-10 03:47:02,442 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 28 [2018-11-10 03:47:02,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:02,442 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2018-11-10 03:47:02,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 03:47:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2018-11-10 03:47:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-10 03:47:02,443 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:02,443 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:02,443 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:02,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:02,444 INFO L82 PathProgramCache]: Analyzing trace with hash -967588774, now seen corresponding path program 2 times [2018-11-10 03:47:02,444 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:02,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:02,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:02,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:02,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:02,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:02,482 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:02,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:47:02,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:47:02,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:02,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:02,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:02,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-10 03:47:02,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 03:47:02,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 03:47:02,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-10 03:47:02,532 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 6 states. [2018-11-10 03:47:02,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:02,579 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2018-11-10 03:47:02,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 03:47:02,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2018-11-10 03:47:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:02,581 INFO L225 Difference]: With dead ends: 100 [2018-11-10 03:47:02,581 INFO L226 Difference]: Without dead ends: 62 [2018-11-10 03:47:02,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-10 03:47:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-10 03:47:02,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2018-11-10 03:47:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-10 03:47:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2018-11-10 03:47:02,587 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 32 [2018-11-10 03:47:02,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:02,587 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2018-11-10 03:47:02,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 03:47:02,587 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2018-11-10 03:47:02,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-10 03:47:02,588 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:02,588 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:02,588 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:02,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:02,588 INFO L82 PathProgramCache]: Analyzing trace with hash 505947873, now seen corresponding path program 3 times [2018-11-10 03:47:02,589 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:02,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:02,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:02,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:02,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:02,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:02,661 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:02,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:47:02,680 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-10 03:47:02,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:02,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 03:47:02,816 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 03:47:02,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2018-11-10 03:47:02,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 03:47:02,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 03:47:02,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2018-11-10 03:47:02,817 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 14 states. [2018-11-10 03:47:03,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:03,031 INFO L93 Difference]: Finished difference Result 176 states and 224 transitions. [2018-11-10 03:47:03,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 03:47:03,032 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-11-10 03:47:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:03,034 INFO L225 Difference]: With dead ends: 176 [2018-11-10 03:47:03,034 INFO L226 Difference]: Without dead ends: 130 [2018-11-10 03:47:03,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2018-11-10 03:47:03,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-11-10 03:47:03,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2018-11-10 03:47:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-11-10 03:47:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 152 transitions. [2018-11-10 03:47:03,046 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 152 transitions. Word has length 36 [2018-11-10 03:47:03,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:03,047 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 152 transitions. [2018-11-10 03:47:03,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 03:47:03,047 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 152 transitions. [2018-11-10 03:47:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-10 03:47:03,048 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:03,048 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:03,048 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:03,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1831451149, now seen corresponding path program 1 times [2018-11-10 03:47:03,049 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:03,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:03,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:03,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:03,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:03,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:03,114 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:03,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:03,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:03,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:03,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-10 03:47:03,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 03:47:03,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 03:47:03,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-10 03:47:03,183 INFO L87 Difference]: Start difference. First operand 124 states and 152 transitions. Second operand 9 states. [2018-11-10 03:47:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:03,242 INFO L93 Difference]: Finished difference Result 219 states and 278 transitions. [2018-11-10 03:47:03,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 03:47:03,243 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2018-11-10 03:47:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:03,245 INFO L225 Difference]: With dead ends: 219 [2018-11-10 03:47:03,245 INFO L226 Difference]: Without dead ends: 156 [2018-11-10 03:47:03,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-10 03:47:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-11-10 03:47:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2018-11-10 03:47:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-11-10 03:47:03,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 182 transitions. [2018-11-10 03:47:03,258 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 182 transitions. Word has length 44 [2018-11-10 03:47:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:03,259 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 182 transitions. [2018-11-10 03:47:03,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 03:47:03,259 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 182 transitions. [2018-11-10 03:47:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-10 03:47:03,260 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:03,260 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:03,260 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:03,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:03,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1136650758, now seen corresponding path program 2 times [2018-11-10 03:47:03,260 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:03,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:03,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:03,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:03,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:03,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:03,336 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:03,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:47:03,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:47:03,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:03,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:03,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:03,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2018-11-10 03:47:03,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 03:47:03,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 03:47:03,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-11-10 03:47:03,419 INFO L87 Difference]: Start difference. First operand 148 states and 182 transitions. Second operand 12 states. [2018-11-10 03:47:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:03,537 INFO L93 Difference]: Finished difference Result 317 states and 401 transitions. [2018-11-10 03:47:03,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-10 03:47:03,538 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-11-10 03:47:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:03,539 INFO L225 Difference]: With dead ends: 317 [2018-11-10 03:47:03,539 INFO L226 Difference]: Without dead ends: 238 [2018-11-10 03:47:03,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2018-11-10 03:47:03,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-11-10 03:47:03,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 191. [2018-11-10 03:47:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-11-10 03:47:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 235 transitions. [2018-11-10 03:47:03,549 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 235 transitions. Word has length 48 [2018-11-10 03:47:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:03,549 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 235 transitions. [2018-11-10 03:47:03,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 03:47:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 235 transitions. [2018-11-10 03:47:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-10 03:47:03,550 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:03,551 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:03,551 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:03,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:03,551 INFO L82 PathProgramCache]: Analyzing trace with hash 2091158145, now seen corresponding path program 3 times [2018-11-10 03:47:03,552 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:03,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:03,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:03,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:03,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:03,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:03,633 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:03,641 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:47:03,650 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-10 03:47:03,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:03,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-10 03:47:03,744 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 03:47:03,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2018-11-10 03:47:03,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 03:47:03,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 03:47:03,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2018-11-10 03:47:03,746 INFO L87 Difference]: Start difference. First operand 191 states and 235 transitions. Second operand 18 states. [2018-11-10 03:47:04,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:04,167 INFO L93 Difference]: Finished difference Result 365 states and 455 transitions. [2018-11-10 03:47:04,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-10 03:47:04,168 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-11-10 03:47:04,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:04,169 INFO L225 Difference]: With dead ends: 365 [2018-11-10 03:47:04,170 INFO L226 Difference]: Without dead ends: 255 [2018-11-10 03:47:04,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-11-10 03:47:04,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-11-10 03:47:04,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 225. [2018-11-10 03:47:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-11-10 03:47:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 276 transitions. [2018-11-10 03:47:04,182 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 276 transitions. Word has length 52 [2018-11-10 03:47:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:04,182 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 276 transitions. [2018-11-10 03:47:04,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 03:47:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 276 transitions. [2018-11-10 03:47:04,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-10 03:47:04,184 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:04,184 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:04,184 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:04,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:04,185 INFO L82 PathProgramCache]: Analyzing trace with hash 600322573, now seen corresponding path program 1 times [2018-11-10 03:47:04,185 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:04,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:04,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:04,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:04,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-11-10 03:47:04,216 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 03:47:04,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 03:47:04,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 03:47:04,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 03:47:04,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 03:47:04,216 INFO L87 Difference]: Start difference. First operand 225 states and 276 transitions. Second operand 3 states. [2018-11-10 03:47:04,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:04,250 INFO L93 Difference]: Finished difference Result 336 states and 416 transitions. [2018-11-10 03:47:04,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 03:47:04,255 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2018-11-10 03:47:04,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:04,256 INFO L225 Difference]: With dead ends: 336 [2018-11-10 03:47:04,256 INFO L226 Difference]: Without dead ends: 231 [2018-11-10 03:47:04,257 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 03:47:04,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-11-10 03:47:04,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2018-11-10 03:47:04,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-11-10 03:47:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 276 transitions. [2018-11-10 03:47:04,268 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 276 transitions. Word has length 60 [2018-11-10 03:47:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:04,268 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 276 transitions. [2018-11-10 03:47:04,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 03:47:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 276 transitions. [2018-11-10 03:47:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-10 03:47:04,269 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:04,269 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:04,269 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:04,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:04,270 INFO L82 PathProgramCache]: Analyzing trace with hash 657580875, now seen corresponding path program 1 times [2018-11-10 03:47:04,270 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:04,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:04,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:04,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:04,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:04,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:04,348 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:04,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:04,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:04,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:04,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-10 03:47:04,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 03:47:04,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 03:47:04,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-10 03:47:04,395 INFO L87 Difference]: Start difference. First operand 225 states and 276 transitions. Second operand 13 states. [2018-11-10 03:47:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:04,444 INFO L93 Difference]: Finished difference Result 411 states and 513 transitions. [2018-11-10 03:47:04,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 03:47:04,446 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2018-11-10 03:47:04,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:04,448 INFO L225 Difference]: With dead ends: 411 [2018-11-10 03:47:04,448 INFO L226 Difference]: Without dead ends: 290 [2018-11-10 03:47:04,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 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 03:47:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-11-10 03:47:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 261. [2018-11-10 03:47:04,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-11-10 03:47:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 321 transitions. [2018-11-10 03:47:04,458 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 321 transitions. Word has length 60 [2018-11-10 03:47:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:04,458 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 321 transitions. [2018-11-10 03:47:04,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 03:47:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 321 transitions. [2018-11-10 03:47:04,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-10 03:47:04,459 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:04,459 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:04,459 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:04,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:04,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1751071406, now seen corresponding path program 2 times [2018-11-10 03:47:04,460 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:04,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:04,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:04,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:04,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:04,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:04,587 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:04,594 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:47:04,606 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:47:04,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:04,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:04,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:04,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 16 [2018-11-10 03:47:04,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 03:47:04,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 03:47:04,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-11-10 03:47:04,646 INFO L87 Difference]: Start difference. First operand 261 states and 321 transitions. Second operand 16 states. [2018-11-10 03:47:04,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:04,823 INFO L93 Difference]: Finished difference Result 530 states and 664 transitions. [2018-11-10 03:47:04,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-10 03:47:04,824 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2018-11-10 03:47:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:04,825 INFO L225 Difference]: With dead ends: 530 [2018-11-10 03:47:04,825 INFO L226 Difference]: Without dead ends: 385 [2018-11-10 03:47:04,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=480, Unknown=0, NotChecked=0, Total=756 [2018-11-10 03:47:04,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2018-11-10 03:47:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 255. [2018-11-10 03:47:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-11-10 03:47:04,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 315 transitions. [2018-11-10 03:47:04,838 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 315 transitions. Word has length 64 [2018-11-10 03:47:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:04,838 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 315 transitions. [2018-11-10 03:47:04,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 03:47:04,839 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 315 transitions. [2018-11-10 03:47:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-10 03:47:04,839 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:04,840 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:04,840 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:04,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:04,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1842263079, now seen corresponding path program 3 times [2018-11-10 03:47:04,840 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:04,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:04,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:04,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:04,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:04,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:04,955 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:04,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:47:04,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-10 03:47:04,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:04,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-11-10 03:47:05,028 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 03:47:05,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2018-11-10 03:47:05,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 03:47:05,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 03:47:05,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-11-10 03:47:05,029 INFO L87 Difference]: Start difference. First operand 255 states and 315 transitions. Second operand 18 states. [2018-11-10 03:47:05,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:05,275 INFO L93 Difference]: Finished difference Result 536 states and 668 transitions. [2018-11-10 03:47:05,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-10 03:47:05,276 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2018-11-10 03:47:05,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:05,277 INFO L225 Difference]: With dead ends: 536 [2018-11-10 03:47:05,277 INFO L226 Difference]: Without dead ends: 394 [2018-11-10 03:47:05,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=629, Unknown=0, NotChecked=0, Total=992 [2018-11-10 03:47:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2018-11-10 03:47:05,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 299. [2018-11-10 03:47:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-11-10 03:47:05,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 367 transitions. [2018-11-10 03:47:05,300 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 367 transitions. Word has length 68 [2018-11-10 03:47:05,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:05,300 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 367 transitions. [2018-11-10 03:47:05,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 03:47:05,300 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 367 transitions. [2018-11-10 03:47:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-11-10 03:47:05,302 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:05,302 INFO L375 BasicCegarLoop]: trace histogram [30, 28, 28, 28, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:05,302 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:05,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:05,302 INFO L82 PathProgramCache]: Analyzing trace with hash 454026756, now seen corresponding path program 1 times [2018-11-10 03:47:05,302 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:05,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:05,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:05,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:05,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 846 proven. 392 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2018-11-10 03:47:05,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:05,435 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:05,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:05,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 844 proven. 392 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2018-11-10 03:47:05,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:05,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-10 03:47:05,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 03:47:05,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 03:47:05,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-10 03:47:05,498 INFO L87 Difference]: Start difference. First operand 299 states and 367 transitions. Second operand 17 states. [2018-11-10 03:47:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:05,580 INFO L93 Difference]: Finished difference Result 512 states and 634 transitions. [2018-11-10 03:47:05,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 03:47:05,581 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 143 [2018-11-10 03:47:05,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:05,582 INFO L225 Difference]: With dead ends: 512 [2018-11-10 03:47:05,582 INFO L226 Difference]: Without dead ends: 349 [2018-11-10 03:47:05,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-10 03:47:05,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2018-11-10 03:47:05,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 323. [2018-11-10 03:47:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-11-10 03:47:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 397 transitions. [2018-11-10 03:47:05,593 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 397 transitions. Word has length 143 [2018-11-10 03:47:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:05,594 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 397 transitions. [2018-11-10 03:47:05,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 03:47:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 397 transitions. [2018-11-10 03:47:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-11-10 03:47:05,595 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:05,595 INFO L375 BasicCegarLoop]: trace histogram [32, 30, 30, 30, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:05,595 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:05,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:05,596 INFO L82 PathProgramCache]: Analyzing trace with hash 231203236, now seen corresponding path program 2 times [2018-11-10 03:47:05,596 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:05,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:05,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:05,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:05,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 966 proven. 450 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2018-11-10 03:47:05,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:05,741 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:05,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:47:05,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:47:05,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:05,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 964 proven. 450 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2018-11-10 03:47:05,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:05,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-10 03:47:05,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 03:47:05,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 03:47:05,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-10 03:47:05,819 INFO L87 Difference]: Start difference. First operand 323 states and 397 transitions. Second operand 18 states. [2018-11-10 03:47:05,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:05,935 INFO L93 Difference]: Finished difference Result 548 states and 679 transitions. [2018-11-10 03:47:05,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 03:47:05,936 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 151 [2018-11-10 03:47:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:05,938 INFO L225 Difference]: With dead ends: 548 [2018-11-10 03:47:05,938 INFO L226 Difference]: Without dead ends: 373 [2018-11-10 03:47:05,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 152 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 03:47:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2018-11-10 03:47:05,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 347. [2018-11-10 03:47:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-11-10 03:47:05,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 427 transitions. [2018-11-10 03:47:05,956 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 427 transitions. Word has length 151 [2018-11-10 03:47:05,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:05,956 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 427 transitions. [2018-11-10 03:47:05,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 03:47:05,956 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 427 transitions. [2018-11-10 03:47:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-11-10 03:47:05,958 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:05,958 INFO L375 BasicCegarLoop]: trace histogram [34, 32, 32, 32, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:05,958 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:05,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:05,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1344922692, now seen corresponding path program 3 times [2018-11-10 03:47:05,961 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:05,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:05,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:05,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:05,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 1094 proven. 512 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2018-11-10 03:47:06,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:06,115 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:06,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:47:06,131 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-10 03:47:06,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:06,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 64 proven. 1095 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2018-11-10 03:47:06,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:06,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2018-11-10 03:47:06,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-10 03:47:06,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-10 03:47:06,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2018-11-10 03:47:06,338 INFO L87 Difference]: Start difference. First operand 347 states and 427 transitions. Second operand 27 states. [2018-11-10 03:47:07,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:07,000 INFO L93 Difference]: Finished difference Result 793 states and 988 transitions. [2018-11-10 03:47:07,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-11-10 03:47:07,001 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 159 [2018-11-10 03:47:07,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:07,002 INFO L225 Difference]: With dead ends: 793 [2018-11-10 03:47:07,003 INFO L226 Difference]: Without dead ends: 606 [2018-11-10 03:47:07,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=910, Invalid=2872, Unknown=0, NotChecked=0, Total=3782 [2018-11-10 03:47:07,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2018-11-10 03:47:07,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 567. [2018-11-10 03:47:07,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2018-11-10 03:47:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 700 transitions. [2018-11-10 03:47:07,022 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 700 transitions. Word has length 159 [2018-11-10 03:47:07,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:07,022 INFO L481 AbstractCegarLoop]: Abstraction has 567 states and 700 transitions. [2018-11-10 03:47:07,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-10 03:47:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 700 transitions. [2018-11-10 03:47:07,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-11-10 03:47:07,025 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:07,025 INFO L375 BasicCegarLoop]: trace histogram [36, 34, 34, 33, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:07,025 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:07,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1194002656, now seen corresponding path program 1 times [2018-11-10 03:47:07,025 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:07,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:07,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:07,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:07,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2389 backedges. 1230 proven. 578 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2018-11-10 03:47:07,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:07,167 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:07,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:07,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2389 backedges. 1228 proven. 578 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2018-11-10 03:47:07,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:07,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-10 03:47:07,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-10 03:47:07,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-10 03:47:07,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-10 03:47:07,237 INFO L87 Difference]: Start difference. First operand 567 states and 700 transitions. Second operand 20 states. [2018-11-10 03:47:07,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:07,320 INFO L93 Difference]: Finished difference Result 1022 states and 1268 transitions. [2018-11-10 03:47:07,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-10 03:47:07,321 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 167 [2018-11-10 03:47:07,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:07,322 INFO L225 Difference]: With dead ends: 1022 [2018-11-10 03:47:07,323 INFO L226 Difference]: Without dead ends: 627 [2018-11-10 03:47:07,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-10 03:47:07,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-11-10 03:47:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 591. [2018-11-10 03:47:07,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2018-11-10 03:47:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 730 transitions. [2018-11-10 03:47:07,342 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 730 transitions. Word has length 167 [2018-11-10 03:47:07,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:07,342 INFO L481 AbstractCegarLoop]: Abstraction has 591 states and 730 transitions. [2018-11-10 03:47:07,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-10 03:47:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 730 transitions. [2018-11-10 03:47:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-11-10 03:47:07,344 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:07,344 INFO L375 BasicCegarLoop]: trace histogram [38, 36, 36, 35, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:07,344 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:07,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:07,344 INFO L82 PathProgramCache]: Analyzing trace with hash 2141547272, now seen corresponding path program 2 times [2018-11-10 03:47:07,344 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:07,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:07,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:07,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:07,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 1374 proven. 648 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2018-11-10 03:47:07,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:07,571 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:07,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:47:07,603 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:47:07,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:07,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 1372 proven. 648 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2018-11-10 03:47:07,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:07,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-10 03:47:07,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-10 03:47:07,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-10 03:47:07,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-10 03:47:07,652 INFO L87 Difference]: Start difference. First operand 591 states and 730 transitions. Second operand 21 states. [2018-11-10 03:47:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:07,753 INFO L93 Difference]: Finished difference Result 1073 states and 1334 transitions. [2018-11-10 03:47:07,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-10 03:47:07,754 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 175 [2018-11-10 03:47:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:07,756 INFO L225 Difference]: With dead ends: 1073 [2018-11-10 03:47:07,756 INFO L226 Difference]: Without dead ends: 666 [2018-11-10 03:47:07,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 176 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 03:47:07,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2018-11-10 03:47:07,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 627. [2018-11-10 03:47:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2018-11-10 03:47:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 775 transitions. [2018-11-10 03:47:07,790 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 775 transitions. Word has length 175 [2018-11-10 03:47:07,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:07,790 INFO L481 AbstractCegarLoop]: Abstraction has 627 states and 775 transitions. [2018-11-10 03:47:07,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-10 03:47:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 775 transitions. [2018-11-10 03:47:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-11-10 03:47:07,793 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:07,793 INFO L375 BasicCegarLoop]: trace histogram [40, 38, 38, 37, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:07,793 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:07,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1422490968, now seen corresponding path program 3 times [2018-11-10 03:47:07,794 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:07,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:07,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:07,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:07,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2973 backedges. 1526 proven. 722 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2018-11-10 03:47:08,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:08,023 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:08,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:47:08,053 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-10 03:47:08,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:08,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2973 backedges. 76 proven. 1527 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2018-11-10 03:47:08,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:08,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2018-11-10 03:47:08,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-10 03:47:08,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-10 03:47:08,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2018-11-10 03:47:08,365 INFO L87 Difference]: Start difference. First operand 627 states and 775 transitions. Second operand 30 states. [2018-11-10 03:47:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:09,608 INFO L93 Difference]: Finished difference Result 1233 states and 1536 transitions. [2018-11-10 03:47:09,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-11-10 03:47:09,609 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 183 [2018-11-10 03:47:09,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:09,610 INFO L225 Difference]: With dead ends: 1233 [2018-11-10 03:47:09,611 INFO L226 Difference]: Without dead ends: 802 [2018-11-10 03:47:09,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2305 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1930, Invalid=6442, Unknown=0, NotChecked=0, Total=8372 [2018-11-10 03:47:09,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2018-11-10 03:47:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 675. [2018-11-10 03:47:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2018-11-10 03:47:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 835 transitions. [2018-11-10 03:47:09,634 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 835 transitions. Word has length 183 [2018-11-10 03:47:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:09,634 INFO L481 AbstractCegarLoop]: Abstraction has 675 states and 835 transitions. [2018-11-10 03:47:09,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-10 03:47:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 835 transitions. [2018-11-10 03:47:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-10 03:47:09,636 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:09,636 INFO L375 BasicCegarLoop]: trace histogram [42, 40, 40, 39, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:09,636 INFO L424 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:09,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:09,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1709127104, now seen corresponding path program 4 times [2018-11-10 03:47:09,637 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:09,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:09,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:09,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:09,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3289 backedges. 1686 proven. 800 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2018-11-10 03:47:09,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:09,820 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:09,826 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 03:47:09,846 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 03:47:09,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:09,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3289 backedges. 266 proven. 3023 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:47:10,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:10,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 43] total 64 [2018-11-10 03:47:10,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-11-10 03:47:10,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-11-10 03:47:10,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3197, Unknown=0, NotChecked=0, Total=4032 [2018-11-10 03:47:10,407 INFO L87 Difference]: Start difference. First operand 675 states and 835 transitions. Second operand 64 states. [2018-11-10 03:47:11,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:11,874 INFO L93 Difference]: Finished difference Result 1629 states and 2028 transitions. [2018-11-10 03:47:11,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-10 03:47:11,875 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 191 [2018-11-10 03:47:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:11,879 INFO L225 Difference]: With dead ends: 1629 [2018-11-10 03:47:11,879 INFO L226 Difference]: Without dead ends: 1162 [2018-11-10 03:47:11,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=859, Invalid=3301, Unknown=0, NotChecked=0, Total=4160 [2018-11-10 03:47:11,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2018-11-10 03:47:11,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1109. [2018-11-10 03:47:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2018-11-10 03:47:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1293 transitions. [2018-11-10 03:47:11,938 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1293 transitions. Word has length 191 [2018-11-10 03:47:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:11,938 INFO L481 AbstractCegarLoop]: Abstraction has 1109 states and 1293 transitions. [2018-11-10 03:47:11,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-11-10 03:47:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1293 transitions. [2018-11-10 03:47:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-11-10 03:47:11,941 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:11,942 INFO L375 BasicCegarLoop]: trace histogram [44, 42, 42, 41, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:11,942 INFO L424 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:11,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:11,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1793916256, now seen corresponding path program 5 times [2018-11-10 03:47:11,942 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:11,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:11,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:11,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:11,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3621 backedges. 1854 proven. 882 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2018-11-10 03:47:12,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:12,200 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:12,208 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 03:47:12,249 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-11-10 03:47:12,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:12,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3621 backedges. 1852 proven. 882 refuted. 0 times theorem prover too weak. 887 trivial. 0 not checked. [2018-11-10 03:47:12,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:12,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-10 03:47:12,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-10 03:47:12,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-10 03:47:12,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-10 03:47:12,311 INFO L87 Difference]: Start difference. First operand 1109 states and 1293 transitions. Second operand 24 states. [2018-11-10 03:47:12,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:12,460 INFO L93 Difference]: Finished difference Result 2137 states and 2493 transitions. [2018-11-10 03:47:12,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-10 03:47:12,460 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 199 [2018-11-10 03:47:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:12,463 INFO L225 Difference]: With dead ends: 2137 [2018-11-10 03:47:12,463 INFO L226 Difference]: Without dead ends: 1262 [2018-11-10 03:47:12,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-10 03:47:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2018-11-10 03:47:12,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1169. [2018-11-10 03:47:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1169 states. [2018-11-10 03:47:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1368 transitions. [2018-11-10 03:47:12,532 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1368 transitions. Word has length 199 [2018-11-10 03:47:12,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:12,532 INFO L481 AbstractCegarLoop]: Abstraction has 1169 states and 1368 transitions. [2018-11-10 03:47:12,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-10 03:47:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1368 transitions. [2018-11-10 03:47:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-11-10 03:47:12,535 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:12,536 INFO L375 BasicCegarLoop]: trace histogram [46, 44, 44, 43, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:12,536 INFO L424 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:12,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:12,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2016726016, now seen corresponding path program 6 times [2018-11-10 03:47:12,536 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:12,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:12,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:12,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:12,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 2030 proven. 968 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2018-11-10 03:47:12,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:12,770 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:12,775 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 03:47:12,786 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-11-10 03:47:12,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:12,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 88 proven. 2031 refuted. 0 times theorem prover too weak. 1850 trivial. 0 not checked. [2018-11-10 03:47:12,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:12,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2018-11-10 03:47:12,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-10 03:47:12,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-10 03:47:12,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2018-11-10 03:47:12,949 INFO L87 Difference]: Start difference. First operand 1169 states and 1368 transitions. Second operand 33 states. [2018-11-10 03:47:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:13,822 INFO L93 Difference]: Finished difference Result 2666 states and 3135 transitions. [2018-11-10 03:47:13,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-11-10 03:47:13,822 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 207 [2018-11-10 03:47:13,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:13,827 INFO L225 Difference]: With dead ends: 2666 [2018-11-10 03:47:13,827 INFO L226 Difference]: Without dead ends: 1751 [2018-11-10 03:47:13,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1567, Invalid=4753, Unknown=0, NotChecked=0, Total=6320 [2018-11-10 03:47:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2018-11-10 03:47:13,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1566. [2018-11-10 03:47:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1566 states. [2018-11-10 03:47:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 1846 transitions. [2018-11-10 03:47:13,914 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 1846 transitions. Word has length 207 [2018-11-10 03:47:13,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:13,914 INFO L481 AbstractCegarLoop]: Abstraction has 1566 states and 1846 transitions. [2018-11-10 03:47:13,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-10 03:47:13,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 1846 transitions. [2018-11-10 03:47:13,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-11-10 03:47:13,916 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:13,916 INFO L375 BasicCegarLoop]: trace histogram [49, 47, 47, 45, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:13,917 INFO L424 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:13,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:13,917 INFO L82 PathProgramCache]: Analyzing trace with hash 617602475, now seen corresponding path program 1 times [2018-11-10 03:47:13,917 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:13,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:13,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:13,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:13,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4521 backedges. 2308 proven. 1058 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-11-10 03:47:14,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:14,194 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:14,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:14,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4521 backedges. 2306 proven. 1058 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2018-11-10 03:47:14,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:14,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-10 03:47:14,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-10 03:47:14,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-10 03:47:14,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-10 03:47:14,304 INFO L87 Difference]: Start difference. First operand 1566 states and 1846 transitions. Second operand 26 states. [2018-11-10 03:47:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:14,448 INFO L93 Difference]: Finished difference Result 3037 states and 3582 transitions. [2018-11-10 03:47:14,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-10 03:47:14,449 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 219 [2018-11-10 03:47:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:14,453 INFO L225 Difference]: With dead ends: 3037 [2018-11-10 03:47:14,453 INFO L226 Difference]: Without dead ends: 1745 [2018-11-10 03:47:14,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-10 03:47:14,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2018-11-10 03:47:14,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 1542. [2018-11-10 03:47:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2018-11-10 03:47:14,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 1816 transitions. [2018-11-10 03:47:14,534 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 1816 transitions. Word has length 219 [2018-11-10 03:47:14,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:14,535 INFO L481 AbstractCegarLoop]: Abstraction has 1542 states and 1816 transitions. [2018-11-10 03:47:14,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-10 03:47:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 1816 transitions. [2018-11-10 03:47:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-11-10 03:47:14,537 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:14,537 INFO L375 BasicCegarLoop]: trace histogram [50, 48, 48, 46, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:14,537 INFO L424 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:14,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:14,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1865149124, now seen corresponding path program 2 times [2018-11-10 03:47:14,538 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:14,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:14,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:14,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:47:14,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4713 backedges. 2406 proven. 1152 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-11-10 03:47:14,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:14,791 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:14,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:47:14,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:47:14,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:14,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4713 backedges. 7 proven. 3480 refuted. 0 times theorem prover too weak. 1226 trivial. 0 not checked. [2018-11-10 03:47:14,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:14,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 29 [2018-11-10 03:47:14,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-10 03:47:14,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-10 03:47:14,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-11-10 03:47:14,912 INFO L87 Difference]: Start difference. First operand 1542 states and 1816 transitions. Second operand 29 states. [2018-11-10 03:47:15,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:15,375 INFO L93 Difference]: Finished difference Result 3103 states and 3700 transitions. [2018-11-10 03:47:15,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-10 03:47:15,375 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 223 [2018-11-10 03:47:15,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:15,380 INFO L225 Difference]: With dead ends: 3103 [2018-11-10 03:47:15,380 INFO L226 Difference]: Without dead ends: 1855 [2018-11-10 03:47:15,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1056, Invalid=1806, Unknown=0, NotChecked=0, Total=2862 [2018-11-10 03:47:15,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2018-11-10 03:47:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1051. [2018-11-10 03:47:15,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2018-11-10 03:47:15,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1265 transitions. [2018-11-10 03:47:15,470 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1265 transitions. Word has length 223 [2018-11-10 03:47:15,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:15,471 INFO L481 AbstractCegarLoop]: Abstraction has 1051 states and 1265 transitions. [2018-11-10 03:47:15,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-10 03:47:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1265 transitions. [2018-11-10 03:47:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-11-10 03:47:15,473 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:15,473 INFO L375 BasicCegarLoop]: trace histogram [52, 50, 50, 48, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:15,473 INFO L424 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:15,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:15,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1689072028, now seen corresponding path program 3 times [2018-11-10 03:47:15,473 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:15,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:15,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:15,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:15,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5109 backedges. 2606 proven. 1250 refuted. 0 times theorem prover too weak. 1253 trivial. 0 not checked. [2018-11-10 03:47:15,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:15,795 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:15,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:47:15,820 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-10 03:47:15,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:15,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5109 backedges. 100 proven. 2607 refuted. 0 times theorem prover too weak. 2402 trivial. 0 not checked. [2018-11-10 03:47:16,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:16,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2018-11-10 03:47:16,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-10 03:47:16,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-10 03:47:16,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=862, Unknown=0, NotChecked=0, Total=1260 [2018-11-10 03:47:16,043 INFO L87 Difference]: Start difference. First operand 1051 states and 1265 transitions. Second operand 36 states. [2018-11-10 03:47:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:17,500 INFO L93 Difference]: Finished difference Result 2155 states and 2604 transitions. [2018-11-10 03:47:17,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-11-10 03:47:17,500 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 231 [2018-11-10 03:47:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:17,502 INFO L225 Difference]: With dead ends: 2155 [2018-11-10 03:47:17,502 INFO L226 Difference]: Without dead ends: 1344 [2018-11-10 03:47:17,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3124, Invalid=10216, Unknown=0, NotChecked=0, Total=13340 [2018-11-10 03:47:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2018-11-10 03:47:17,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1176. [2018-11-10 03:47:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1176 states. [2018-11-10 03:47:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1417 transitions. [2018-11-10 03:47:17,609 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1417 transitions. Word has length 231 [2018-11-10 03:47:17,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:17,609 INFO L481 AbstractCegarLoop]: Abstraction has 1176 states and 1417 transitions. [2018-11-10 03:47:17,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-10 03:47:17,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1417 transitions. [2018-11-10 03:47:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-11-10 03:47:17,611 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:17,612 INFO L375 BasicCegarLoop]: trace histogram [81, 78, 78, 78, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:17,612 INFO L424 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:17,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:17,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1499059803, now seen corresponding path program 4 times [2018-11-10 03:47:17,612 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:17,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:17,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:17,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:17,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12509 backedges. 5628 proven. 1352 refuted. 0 times theorem prover too weak. 5529 trivial. 0 not checked. [2018-11-10 03:47:17,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:17,893 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:17,898 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 03:47:17,943 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 03:47:17,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:17,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12509 backedges. 5624 proven. 1352 refuted. 0 times theorem prover too weak. 5533 trivial. 0 not checked. [2018-11-10 03:47:18,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:18,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-10 03:47:18,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-10 03:47:18,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-10 03:47:18,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-11-10 03:47:18,015 INFO L87 Difference]: Start difference. First operand 1176 states and 1417 transitions. Second operand 29 states. [2018-11-10 03:47:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:18,243 INFO L93 Difference]: Finished difference Result 2261 states and 2728 transitions. [2018-11-10 03:47:18,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-10 03:47:18,243 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 354 [2018-11-10 03:47:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:18,245 INFO L225 Difference]: With dead ends: 2261 [2018-11-10 03:47:18,245 INFO L226 Difference]: Without dead ends: 1340 [2018-11-10 03:47:18,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-11-10 03:47:18,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2018-11-10 03:47:18,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1033. [2018-11-10 03:47:18,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1033 states. [2018-11-10 03:47:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1238 transitions. [2018-11-10 03:47:18,306 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1238 transitions. Word has length 354 [2018-11-10 03:47:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:18,307 INFO L481 AbstractCegarLoop]: Abstraction has 1033 states and 1238 transitions. [2018-11-10 03:47:18,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-10 03:47:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1238 transitions. [2018-11-10 03:47:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-11-10 03:47:18,309 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:18,309 INFO L375 BasicCegarLoop]: trace histogram [84, 81, 81, 81, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:18,309 INFO L424 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:18,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:18,310 INFO L82 PathProgramCache]: Analyzing trace with hash -617878334, now seen corresponding path program 5 times [2018-11-10 03:47:18,310 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:18,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:18,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:18,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:18,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13475 backedges. 6060 proven. 1458 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-11-10 03:47:18,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:18,646 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:18,656 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 03:47:18,703 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-11-10 03:47:18,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:18,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13475 backedges. 6056 proven. 1458 refuted. 0 times theorem prover too weak. 5961 trivial. 0 not checked. [2018-11-10 03:47:18,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:18,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-11-10 03:47:18,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-10 03:47:18,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-10 03:47:18,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-10 03:47:18,792 INFO L87 Difference]: Start difference. First operand 1033 states and 1238 transitions. Second operand 30 states. [2018-11-10 03:47:18,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:18,939 INFO L93 Difference]: Finished difference Result 1909 states and 2289 transitions. [2018-11-10 03:47:18,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-10 03:47:18,939 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 366 [2018-11-10 03:47:18,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:18,941 INFO L225 Difference]: With dead ends: 1909 [2018-11-10 03:47:18,941 INFO L226 Difference]: Without dead ends: 1147 [2018-11-10 03:47:18,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-10 03:47:18,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2018-11-10 03:47:19,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1081. [2018-11-10 03:47:19,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1081 states. [2018-11-10 03:47:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1298 transitions. [2018-11-10 03:47:19,006 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1298 transitions. Word has length 366 [2018-11-10 03:47:19,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:19,006 INFO L481 AbstractCegarLoop]: Abstraction has 1081 states and 1298 transitions. [2018-11-10 03:47:19,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-10 03:47:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1298 transitions. [2018-11-10 03:47:19,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-11-10 03:47:19,009 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:47:19,009 INFO L375 BasicCegarLoop]: trace histogram [87, 84, 84, 84, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:47:19,009 INFO L424 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:47:19,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:47:19,009 INFO L82 PathProgramCache]: Analyzing trace with hash 914677929, now seen corresponding path program 6 times [2018-11-10 03:47:19,009 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:47:19,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:47:19,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:19,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:47:19,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:47:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:47:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14477 backedges. 6508 proven. 1568 refuted. 0 times theorem prover too weak. 6401 trivial. 0 not checked. [2018-11-10 03:47:19,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:47:19,370 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/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 03:47:19,376 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 03:47:19,392 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-11-10 03:47:19,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:47:19,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:47:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14477 backedges. 6626 proven. 1 refuted. 0 times theorem prover too weak. 7850 trivial. 0 not checked. [2018-11-10 03:47:19,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:47:19,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 10] total 39 [2018-11-10 03:47:19,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-10 03:47:19,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-10 03:47:19,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=995, Unknown=0, NotChecked=0, Total=1482 [2018-11-10 03:47:19,607 INFO L87 Difference]: Start difference. First operand 1081 states and 1298 transitions. Second operand 39 states. [2018-11-10 03:47:20,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:47:20,205 INFO L93 Difference]: Finished difference Result 2023 states and 2436 transitions. [2018-11-10 03:47:20,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-10 03:47:20,205 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 378 [2018-11-10 03:47:20,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:47:20,205 INFO L225 Difference]: With dead ends: 2023 [2018-11-10 03:47:20,205 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 03:47:20,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1479, Invalid=3213, Unknown=0, NotChecked=0, Total=4692 [2018-11-10 03:47:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 03:47:20,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 03:47:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 03:47:20,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 03:47:20,209 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 378 [2018-11-10 03:47:20,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:47:20,209 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 03:47:20,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-10 03:47:20,209 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 03:47:20,209 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 03:47:20,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 03:47:21,926 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,266 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,299 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,386 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,490 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,495 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,508 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,514 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,516 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,522 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,523 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,525 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,525 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,526 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,527 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,532 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,535 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,546 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,557 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,558 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,565 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,567 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,567 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,589 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,607 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,614 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,620 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,664 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,670 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,673 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,705 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,720 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,739 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,744 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,766 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,770 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,778 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,786 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,848 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,849 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,849 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,921 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,926 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:22,932 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,079 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,084 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,094 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,107 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,119 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,160 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,183 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,195 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,213 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,233 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,257 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,285 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,382 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,387 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 03:47:23,406 WARN L179 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 1563 DAG size of output: 658 [2018-11-10 03:47:25,373 WARN L179 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 605 DAG size of output: 19 [2018-11-10 03:47:25,417 INFO L425 ceAbstractionStarter]: For program point nondetFINAL(lines 15 19) no Hoare annotation was computed. [2018-11-10 03:47:25,417 INFO L428 ceAbstractionStarter]: At program point nondetENTRY(lines 15 19) the Hoare annotation is: true [2018-11-10 03:47:25,417 INFO L425 ceAbstractionStarter]: For program point nondetEXIT(lines 15 19) no Hoare annotation was computed. [2018-11-10 03:47:25,417 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-11-10 03:47:25,417 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-11-10 03:47:25,417 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 03:47:25,417 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 03:47:25,417 INFO L421 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: (<= ~last~0 6) [2018-11-10 03:47:25,417 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 03:47:25,417 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 03:47:25,417 INFO L421 ceAbstractionStarter]: At program point L33(lines 24 34) the Hoare annotation is: (or (and (= main_~b~0 main_~a~0) (<= 200000 main_~c~0) (<= main_~c~0 200000)) (< 6 |old(~last~0)|) (and (= main_~b~0 0) (= main_~c~0 0) (= main_~a~0 0))) [2018-11-10 03:47:25,418 INFO L421 ceAbstractionStarter]: At program point L31-1(lines 31 32) the Hoare annotation is: (or (and (= main_~b~0 main_~a~0) (<= 200000 main_~c~0) (<= main_~c~0 200000)) (< 6 |old(~last~0)|)) [2018-11-10 03:47:25,418 INFO L425 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-11-10 03:47:25,418 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 21 35) no Hoare annotation was computed. [2018-11-10 03:47:25,418 INFO L421 ceAbstractionStarter]: At program point mainENTRY(lines 21 35) the Hoare annotation is: (or (< 6 |old(~last~0)|) (<= ~last~0 6)) [2018-11-10 03:47:25,418 INFO L425 ceAbstractionStarter]: For program point L28-1(lines 24 34) no Hoare annotation was computed. [2018-11-10 03:47:25,418 INFO L425 ceAbstractionStarter]: For program point L26-1(lines 26 27) no Hoare annotation was computed. [2018-11-10 03:47:25,418 INFO L425 ceAbstractionStarter]: For program point L24-1(lines 24 34) no Hoare annotation was computed. [2018-11-10 03:47:25,418 INFO L425 ceAbstractionStarter]: For program point L26-3(lines 26 27) no Hoare annotation was computed. [2018-11-10 03:47:25,418 INFO L425 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-11-10 03:47:25,418 INFO L421 ceAbstractionStarter]: At program point L26-4(lines 26 27) the Hoare annotation is: (let ((.cse0 (= main_~b~0 main_~a~0)) (.cse1 (<= main_~c~0 200000))) (or (and .cse0 .cse1 (<= 1 main_~st~0)) (< 6 |old(~last~0)|) (and .cse0 .cse1 (<= ~last~0 199999)))) [2018-11-10 03:47:25,418 INFO L425 ceAbstractionStarter]: For program point L26-5(lines 24 34) no Hoare annotation was computed. [2018-11-10 03:47:25,418 INFO L425 ceAbstractionStarter]: For program point L24-3(lines 21 35) no Hoare annotation was computed. [2018-11-10 03:47:25,418 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 8 13) the Hoare annotation is: true [2018-11-10 03:47:25,418 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2018-11-10 03:47:25,418 INFO L425 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2018-11-10 03:47:25,419 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 8 13) no Hoare annotation was computed. [2018-11-10 03:47:25,419 INFO L425 ceAbstractionStarter]: For program point L9(lines 9 11) no Hoare annotation was computed. [2018-11-10 03:47:25,419 INFO L425 ceAbstractionStarter]: For program point L9-2(lines 8 13) no Hoare annotation was computed. [2018-11-10 03:47:25,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 03:47:25 BoogieIcfgContainer [2018-11-10 03:47:25,427 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 03:47:25,427 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 03:47:25,427 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 03:47:25,427 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 03:47:25,428 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 03:47:01" (3/4) ... [2018-11-10 03:47:25,430 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 03:47:25,434 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 03:47:25,434 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure nondet [2018-11-10 03:47:25,435 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 03:47:25,435 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-10 03:47:25,437 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2018-11-10 03:47:25,437 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-11-10 03:47:25,457 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((b == a && 200000 <= c) && c <= 200000) || 6 < \old(last)) || ((b == 0 && c == 0) && a == 0) [2018-11-10 03:47:25,457 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((b == a && c <= 200000) && 1 <= st) || 6 < \old(last)) || ((b == a && c <= 200000) && last <= 199999) [2018-11-10 03:47:25,467 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e43e3cde-47e7-45eb-9316-a8cd9e2233ff/bin-2019/uautomizer/witness.graphml [2018-11-10 03:47:25,467 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 03:47:25,468 INFO L168 Benchmark]: Toolchain (without parser) took 24011.94 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 738.2 MB). Free memory was 959.1 MB in the beginning and 1.6 GB in the end (delta: -653.0 MB). Peak memory consumption was 85.2 MB. Max. memory is 11.5 GB. [2018-11-10 03:47:25,468 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 03:47:25,468 INFO L168 Benchmark]: CACSL2BoogieTranslator took 147.41 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 03:47:25,469 INFO L168 Benchmark]: Boogie Preprocessor took 16.46 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 03:47:25,469 INFO L168 Benchmark]: RCFGBuilder took 174.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -184.6 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2018-11-10 03:47:25,469 INFO L168 Benchmark]: TraceAbstraction took 23630.52 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 591.4 MB). Free memory was 1.1 GB in the beginning and 1.6 GB in the end (delta: -497.5 MB). Peak memory consumption was 861.7 MB. Max. memory is 11.5 GB. [2018-11-10 03:47:25,469 INFO L168 Benchmark]: Witness Printer took 40.15 ms. Allocated memory is still 1.8 GB. Free memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-11-10 03:47:25,471 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 147.41 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.46 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 174.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -184.6 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 23630.52 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 591.4 MB). Free memory was 1.1 GB in the beginning and 1.6 GB in the end (delta: -497.5 MB). Peak memory consumption was 861.7 MB. Max. memory is 11.5 GB. * Witness Printer took 40.15 ms. Allocated memory is still 1.8 GB. Free memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: 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: 26]: Loop Invariant Derived loop invariant: (((b == a && c <= 200000) && 1 <= st) || 6 < \old(last)) || ((b == a && c <= 200000) && last <= 199999) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((b == a && 200000 <= c) && c <= 200000) || 6 < \old(last)) || ((b == 0 && c == 0) && a == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. SAFE Result, 23.5s OverallTime, 28 OverallIterations, 87 TraceHistogramMax, 9.4s AutomataDifference, 0.0s DeadEndRemovalTime, 5.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 816 SDtfs, 2775 SDslu, 9448 SDs, 0 SdLazy, 10611 SolverSat, 327 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4631 GetRequests, 3778 SyntacticMatches, 0 SemanticMatches, 853 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11733 ImplicationChecksByTransitivity, 8.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1566occurred in iteration=22, 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: 0.8s AutomataMinimizationTime, 28 MinimizatonAttempts, 2548 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 179 PreInvPairs, 489 NumberOfFragments, 80 HoareAnnotationTreeSize, 179 FomulaSimplifications, 137869055 FormulaSimplificationTreeSizeReduction, 3.2s HoareSimplificationTime, 9 FomulaSimplificationsInter, 1147021 FormulaSimplificationTreeSizeReductionInter, 1.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 7703 NumberOfCodeBlocks, 6544 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 7650 ConstructedInterpolants, 0 QuantifiedInterpolants, 3889055 SizeOfPredicates, 53 NumberOfNonLiveVariables, 4304 ConjunctsInSsa, 491 ConjunctsInUnsatCore, 53 InterpolantComputations, 7 PerfectInterpolantSequences, 124960/161058 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...