./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/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 59acfc6d5178664a3f2144603274c2b6e876292a .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-19 22:44:25,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 22:44:25,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 22:44:25,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 22:44:25,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 22:44:25,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 22:44:25,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 22:44:25,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 22:44:25,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 22:44:25,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 22:44:25,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 22:44:25,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 22:44:25,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 22:44:25,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 22:44:25,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 22:44:25,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 22:44:25,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 22:44:25,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 22:44:25,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 22:44:25,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 22:44:25,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 22:44:25,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 22:44:25,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 22:44:25,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 22:44:25,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 22:44:25,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 22:44:25,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 22:44:25,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 22:44:25,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 22:44:25,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 22:44:25,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 22:44:25,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 22:44:25,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 22:44:25,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 22:44:25,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 22:44:25,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 22:44:25,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 22:44:25,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 22:44:25,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 22:44:25,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 22:44:25,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 22:44:25,735 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 22:44:25,765 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 22:44:25,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 22:44:25,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 22:44:25,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 22:44:25,767 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 22:44:25,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 22:44:25,767 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 22:44:25,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 22:44:25,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 22:44:25,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 22:44:25,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 22:44:25,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 22:44:25,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 22:44:25,769 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 22:44:25,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 22:44:25,769 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 22:44:25,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 22:44:25,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 22:44:25,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 22:44:25,770 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 22:44:25,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 22:44:25,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 22:44:25,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 22:44:25,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 22:44:25,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 22:44:25,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 22:44:25,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 22:44:25,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 22:44:25,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/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 -> 59acfc6d5178664a3f2144603274c2b6e876292a [2019-11-19 22:44:25,937 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 22:44:25,946 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 22:44:25,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 22:44:25,960 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 22:44:25,961 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 22:44:25,961 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2019-11-19 22:44:26,024 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/data/9cbdd4cae/fe3f10c0471042c2833bfa8e0960691c/FLAG4b93defcd [2019-11-19 22:44:26,456 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 22:44:26,457 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2019-11-19 22:44:26,463 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/data/9cbdd4cae/fe3f10c0471042c2833bfa8e0960691c/FLAG4b93defcd [2019-11-19 22:44:26,482 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/data/9cbdd4cae/fe3f10c0471042c2833bfa8e0960691c [2019-11-19 22:44:26,487 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 22:44:26,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 22:44:26,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 22:44:26,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 22:44:26,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 22:44:26,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:44:26" (1/1) ... [2019-11-19 22:44:26,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@389382a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:44:26, skipping insertion in model container [2019-11-19 22:44:26,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:44:26" (1/1) ... [2019-11-19 22:44:26,508 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 22:44:26,527 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 22:44:26,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:44:26,662 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 22:44:26,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:44:26,757 INFO L192 MainTranslator]: Completed translation [2019-11-19 22:44:26,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:44:26 WrapperNode [2019-11-19 22:44:26,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 22:44:26,759 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 22:44:26,759 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 22:44:26,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 22:44:26,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:44:26" (1/1) ... [2019-11-19 22:44:26,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:44:26" (1/1) ... [2019-11-19 22:44:26,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 22:44:26,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 22:44:26,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 22:44:26,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 22:44:26,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:44:26" (1/1) ... [2019-11-19 22:44:26,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:44:26" (1/1) ... [2019-11-19 22:44:26,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:44:26" (1/1) ... [2019-11-19 22:44:26,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:44:26" (1/1) ... [2019-11-19 22:44:26,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:44:26" (1/1) ... [2019-11-19 22:44:26,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:44:26" (1/1) ... [2019-11-19 22:44:26,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:44:26" (1/1) ... [2019-11-19 22:44:26,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 22:44:26,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 22:44:26,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 22:44:26,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 22:44:26,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:44:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/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 [2019-11-19 22:44:26,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 22:44:26,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 22:44:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-19 22:44:26,869 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-19 22:44:27,079 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 22:44:27,079 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-19 22:44:27,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:44:27 BoogieIcfgContainer [2019-11-19 22:44:27,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 22:44:27,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 22:44:27,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 22:44:27,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 22:44:27,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:44:26" (1/3) ... [2019-11-19 22:44:27,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a6e991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:44:27, skipping insertion in model container [2019-11-19 22:44:27,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:44:26" (2/3) ... [2019-11-19 22:44:27,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a6e991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:44:27, skipping insertion in model container [2019-11-19 22:44:27,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:44:27" (3/3) ... [2019-11-19 22:44:27,090 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_25x0-2.c [2019-11-19 22:44:27,099 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 22:44:27,105 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 22:44:27,114 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 22:44:27,134 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 22:44:27,134 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 22:44:27,134 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 22:44:27,134 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 22:44:27,134 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 22:44:27,134 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 22:44:27,135 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 22:44:27,135 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 22:44:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-19 22:44:27,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-19 22:44:27,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:27,156 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:27,156 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:27,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:27,162 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-19 22:44:27,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:27,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237188468] [2019-11-19 22:44:27,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:44:27,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237188468] [2019-11-19 22:44:27,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:44:27,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-19 22:44:27,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047457132] [2019-11-19 22:44:27,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 22:44:27,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:27,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 22:44:27,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-19 22:44:27,446 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-11-19 22:44:27,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:27,558 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-19 22:44:27,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 22:44:27,560 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-19 22:44:27,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:27,568 INFO L225 Difference]: With dead ends: 24 [2019-11-19 22:44:27,568 INFO L226 Difference]: Without dead ends: 14 [2019-11-19 22:44:27,571 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-19 22:44:27,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-19 22:44:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-19 22:44:27,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-19 22:44:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-19 22:44:27,603 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-19 22:44:27,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:27,604 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-19 22:44:27,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 22:44:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-19 22:44:27,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-19 22:44:27,605 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:27,606 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:27,606 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:27,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:27,606 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-19 22:44:27,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:27,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825428340] [2019-11-19 22:44:27,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 22:44:27,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825428340] [2019-11-19 22:44:27,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266445179] [2019-11-19 22:44:27,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:27,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 22:44:27,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 22:44:27,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:27,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-11-19 22:44:27,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096245595] [2019-11-19 22:44:27,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-19 22:44:27,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:27,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 22:44:27,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-19 22:44:27,883 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 9 states. [2019-11-19 22:44:28,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:28,005 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-19 22:44:28,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 22:44:28,005 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-11-19 22:44:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:28,006 INFO L225 Difference]: With dead ends: 21 [2019-11-19 22:44:28,007 INFO L226 Difference]: Without dead ends: 17 [2019-11-19 22:44:28,008 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-19 22:44:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-19 22:44:28,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-19 22:44:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-19 22:44:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-19 22:44:28,012 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-19 22:44:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:28,013 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-19 22:44:28,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-19 22:44:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-19 22:44:28,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-19 22:44:28,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:28,014 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:28,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:28,215 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:28,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:28,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-19 22:44:28,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:28,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219694409] [2019-11-19 22:44:28,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-19 22:44:28,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219694409] [2019-11-19 22:44:28,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188037360] [2019-11-19 22:44:28,422 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:28,468 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:44:28,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:28,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 22:44:28,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-19 22:44:28,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:28,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-11-19 22:44:28,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691907457] [2019-11-19 22:44:28,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 22:44:28,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:28,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 22:44:28,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-19 22:44:28,494 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-11-19 22:44:28,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:28,592 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-19 22:44:28,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 22:44:28,592 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-19 22:44:28,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:28,593 INFO L225 Difference]: With dead ends: 24 [2019-11-19 22:44:28,593 INFO L226 Difference]: Without dead ends: 20 [2019-11-19 22:44:28,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-19 22:44:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-19 22:44:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-19 22:44:28,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-19 22:44:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-19 22:44:28,600 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-19 22:44:28,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:28,600 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-19 22:44:28,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 22:44:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-19 22:44:28,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-19 22:44:28,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:28,602 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:28,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:28,806 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:28,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:28,806 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-19 22:44:28,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:28,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447913313] [2019-11-19 22:44:28,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-19 22:44:29,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447913313] [2019-11-19 22:44:29,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456699248] [2019-11-19 22:44:29,018 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:29,079 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-19 22:44:29,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:29,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-19 22:44:29,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-19 22:44:29,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:29,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-11-19 22:44:29,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034507998] [2019-11-19 22:44:29,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-19 22:44:29,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:29,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-19 22:44:29,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-19 22:44:29,121 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 11 states. [2019-11-19 22:44:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:29,238 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-19 22:44:29,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 22:44:29,239 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2019-11-19 22:44:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:29,240 INFO L225 Difference]: With dead ends: 27 [2019-11-19 22:44:29,240 INFO L226 Difference]: Without dead ends: 23 [2019-11-19 22:44:29,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-11-19 22:44:29,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-19 22:44:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-19 22:44:29,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-19 22:44:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-19 22:44:29,249 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-19 22:44:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:29,249 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-19 22:44:29,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-19 22:44:29,250 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-19 22:44:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-19 22:44:29,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:29,252 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:29,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:29,456 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:29,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-19 22:44:29,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:29,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19773809] [2019-11-19 22:44:29,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-19 22:44:29,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19773809] [2019-11-19 22:44:29,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332374663] [2019-11-19 22:44:29,674 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:29,715 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 22:44:29,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:29,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-19 22:44:29,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-19 22:44:29,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:29,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2019-11-19 22:44:29,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095458972] [2019-11-19 22:44:29,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-19 22:44:29,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:29,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-19 22:44:29,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-19 22:44:29,754 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2019-11-19 22:44:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:29,896 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-19 22:44:29,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 22:44:29,896 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2019-11-19 22:44:29,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:29,898 INFO L225 Difference]: With dead ends: 30 [2019-11-19 22:44:29,898 INFO L226 Difference]: Without dead ends: 26 [2019-11-19 22:44:29,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-19 22:44:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-19 22:44:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-19 22:44:29,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 22:44:29,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-19 22:44:29,904 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-19 22:44:29,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:29,905 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-19 22:44:29,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-19 22:44:29,905 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-19 22:44:29,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-19 22:44:29,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:29,907 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:30,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:30,108 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:30,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:30,108 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-19 22:44:30,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:30,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500693374] [2019-11-19 22:44:30,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-19 22:44:30,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500693374] [2019-11-19 22:44:30,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505037569] [2019-11-19 22:44:30,324 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:30,373 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-19 22:44:30,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:30,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-19 22:44:30,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-19 22:44:30,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:30,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2019-11-19 22:44:30,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932071411] [2019-11-19 22:44:30,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-19 22:44:30,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:30,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-19 22:44:30,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-19 22:44:30,415 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2019-11-19 22:44:30,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:30,562 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-19 22:44:30,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 22:44:30,562 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-11-19 22:44:30,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:30,563 INFO L225 Difference]: With dead ends: 33 [2019-11-19 22:44:30,563 INFO L226 Difference]: Without dead ends: 29 [2019-11-19 22:44:30,564 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-11-19 22:44:30,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-19 22:44:30,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-19 22:44:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-19 22:44:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-19 22:44:30,570 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-19 22:44:30,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:30,570 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-19 22:44:30,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-19 22:44:30,570 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-19 22:44:30,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-19 22:44:30,571 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:30,572 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:30,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:30,774 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:30,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:30,774 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-19 22:44:30,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:30,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988940400] [2019-11-19 22:44:30,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-19 22:44:31,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988940400] [2019-11-19 22:44:31,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43410802] [2019-11-19 22:44:31,029 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:31,070 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-19 22:44:31,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:31,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-19 22:44:31,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-19 22:44:31,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:31,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-11-19 22:44:31,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733827356] [2019-11-19 22:44:31,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-19 22:44:31,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:31,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-19 22:44:31,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-19 22:44:31,107 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 14 states. [2019-11-19 22:44:31,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:31,283 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-19 22:44:31,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-19 22:44:31,283 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2019-11-19 22:44:31,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:31,285 INFO L225 Difference]: With dead ends: 36 [2019-11-19 22:44:31,285 INFO L226 Difference]: Without dead ends: 32 [2019-11-19 22:44:31,286 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2019-11-19 22:44:31,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-19 22:44:31,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-19 22:44:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-19 22:44:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-19 22:44:31,300 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-19 22:44:31,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:31,300 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-19 22:44:31,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-19 22:44:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-19 22:44:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-19 22:44:31,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:31,305 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:31,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:31,510 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:31,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:31,511 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-19 22:44:31,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:31,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177487599] [2019-11-19 22:44:31,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-19 22:44:31,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177487599] [2019-11-19 22:44:31,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040599988] [2019-11-19 22:44:31,861 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:31,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-19 22:44:31,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-19 22:44:31,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:31,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2019-11-19 22:44:31,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403976970] [2019-11-19 22:44:31,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-19 22:44:31,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:31,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-19 22:44:31,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-11-19 22:44:31,989 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 15 states. [2019-11-19 22:44:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:32,184 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-19 22:44:32,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-19 22:44:32,184 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-11-19 22:44:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:32,186 INFO L225 Difference]: With dead ends: 39 [2019-11-19 22:44:32,186 INFO L226 Difference]: Without dead ends: 35 [2019-11-19 22:44:32,187 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2019-11-19 22:44:32,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-19 22:44:32,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-19 22:44:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-19 22:44:32,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-19 22:44:32,193 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-19 22:44:32,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:32,194 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-19 22:44:32,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-19 22:44:32,194 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-19 22:44:32,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-19 22:44:32,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:32,196 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:32,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:32,400 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:32,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-19 22:44:32,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:32,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266213500] [2019-11-19 22:44:32,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-19 22:44:32,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266213500] [2019-11-19 22:44:32,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866193373] [2019-11-19 22:44:32,717 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:32,773 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:44:32,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:32,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-19 22:44:32,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-19 22:44:32,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:32,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2019-11-19 22:44:32,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103584727] [2019-11-19 22:44:32,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 22:44:32,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:32,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 22:44:32,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-11-19 22:44:32,859 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 16 states. [2019-11-19 22:44:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:33,088 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-19 22:44:33,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-19 22:44:33,089 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2019-11-19 22:44:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:33,090 INFO L225 Difference]: With dead ends: 42 [2019-11-19 22:44:33,090 INFO L226 Difference]: Without dead ends: 38 [2019-11-19 22:44:33,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2019-11-19 22:44:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-19 22:44:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-19 22:44:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-19 22:44:33,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-19 22:44:33,097 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-19 22:44:33,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:33,102 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-19 22:44:33,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 22:44:33,103 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-19 22:44:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-19 22:44:33,108 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:33,108 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:33,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:33,320 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:33,320 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-19 22:44:33,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:33,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955446736] [2019-11-19 22:44:33,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-19 22:44:33,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955446736] [2019-11-19 22:44:33,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328475610] [2019-11-19 22:44:33,685 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:33,748 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-19 22:44:33,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:33,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-19 22:44:33,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-19 22:44:33,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:33,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2019-11-19 22:44:33,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104374206] [2019-11-19 22:44:33,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-19 22:44:33,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:33,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-19 22:44:33,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-19 22:44:33,828 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-11-19 22:44:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:34,038 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-19 22:44:34,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-19 22:44:34,039 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2019-11-19 22:44:34,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:34,040 INFO L225 Difference]: With dead ends: 45 [2019-11-19 22:44:34,040 INFO L226 Difference]: Without dead ends: 41 [2019-11-19 22:44:34,041 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2019-11-19 22:44:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-19 22:44:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-19 22:44:34,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-19 22:44:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-19 22:44:34,048 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-19 22:44:34,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:34,048 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-19 22:44:34,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-19 22:44:34,048 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-19 22:44:34,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-19 22:44:34,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:34,050 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:34,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:34,251 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:34,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:34,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-19 22:44:34,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:34,251 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875142958] [2019-11-19 22:44:34,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-19 22:44:34,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875142958] [2019-11-19 22:44:34,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965896349] [2019-11-19 22:44:34,674 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:34,725 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 22:44:34,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:34,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-19 22:44:34,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-19 22:44:34,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:34,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2019-11-19 22:44:34,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787731153] [2019-11-19 22:44:34,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-19 22:44:34,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-19 22:44:34,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-11-19 22:44:34,777 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 18 states. [2019-11-19 22:44:34,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:34,965 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-19 22:44:34,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-19 22:44:34,966 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2019-11-19 22:44:34,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:34,967 INFO L225 Difference]: With dead ends: 48 [2019-11-19 22:44:34,967 INFO L226 Difference]: Without dead ends: 44 [2019-11-19 22:44:34,968 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2019-11-19 22:44:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-19 22:44:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-19 22:44:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-19 22:44:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-19 22:44:34,980 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-19 22:44:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:34,980 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-19 22:44:34,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-19 22:44:34,980 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-19 22:44:34,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-19 22:44:34,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:34,982 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:35,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:35,192 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:35,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:35,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-19 22:44:35,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:35,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870315238] [2019-11-19 22:44:35,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-19 22:44:35,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870315238] [2019-11-19 22:44:35,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559432088] [2019-11-19 22:44:35,583 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:35,647 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-19 22:44:35,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:35,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-19 22:44:35,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-19 22:44:35,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:35,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 19 [2019-11-19 22:44:35,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742837251] [2019-11-19 22:44:35,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-19 22:44:35,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:35,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-19 22:44:35,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-11-19 22:44:35,724 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 19 states. [2019-11-19 22:44:35,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:35,985 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-19 22:44:35,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-19 22:44:35,985 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2019-11-19 22:44:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:35,986 INFO L225 Difference]: With dead ends: 51 [2019-11-19 22:44:35,987 INFO L226 Difference]: Without dead ends: 47 [2019-11-19 22:44:35,988 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2019-11-19 22:44:35,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-19 22:44:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-19 22:44:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-19 22:44:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-19 22:44:35,993 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-19 22:44:35,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:35,994 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-19 22:44:35,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-19 22:44:35,994 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-19 22:44:35,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-19 22:44:35,995 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:35,995 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:36,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:36,199 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:36,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:36,199 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-19 22:44:36,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:36,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307593328] [2019-11-19 22:44:36,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-19 22:44:36,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307593328] [2019-11-19 22:44:36,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454477635] [2019-11-19 22:44:36,835 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:36,907 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-19 22:44:36,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:36,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-19 22:44:36,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-19 22:44:36,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:36,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2019-11-19 22:44:36,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176910401] [2019-11-19 22:44:36,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-19 22:44:36,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:36,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-19 22:44:36,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-11-19 22:44:36,990 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2019-11-19 22:44:37,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:37,323 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-19 22:44:37,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-19 22:44:37,323 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2019-11-19 22:44:37,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:37,325 INFO L225 Difference]: With dead ends: 54 [2019-11-19 22:44:37,325 INFO L226 Difference]: Without dead ends: 50 [2019-11-19 22:44:37,326 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-11-19 22:44:37,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-19 22:44:37,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-19 22:44:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-19 22:44:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-19 22:44:37,340 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-19 22:44:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:37,341 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-19 22:44:37,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-19 22:44:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-19 22:44:37,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-19 22:44:37,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:37,343 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:37,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:37,544 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:37,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-19 22:44:37,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:37,544 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968224682] [2019-11-19 22:44:37,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-19 22:44:38,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968224682] [2019-11-19 22:44:38,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544145580] [2019-11-19 22:44:38,239 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:38,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-19 22:44:38,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-19 22:44:38,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:38,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 21 [2019-11-19 22:44:38,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621729089] [2019-11-19 22:44:38,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-19 22:44:38,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:38,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-19 22:44:38,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-11-19 22:44:38,349 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 21 states. [2019-11-19 22:44:38,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:38,614 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-19 22:44:38,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-19 22:44:38,615 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2019-11-19 22:44:38,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:38,616 INFO L225 Difference]: With dead ends: 57 [2019-11-19 22:44:38,616 INFO L226 Difference]: Without dead ends: 53 [2019-11-19 22:44:38,617 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=807, Unknown=0, NotChecked=0, Total=1190 [2019-11-19 22:44:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-19 22:44:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-19 22:44:38,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-19 22:44:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-19 22:44:38,621 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-19 22:44:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:38,625 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-19 22:44:38,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-19 22:44:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-19 22:44:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-19 22:44:38,627 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:38,628 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:38,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:38,828 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:38,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-19 22:44:38,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:38,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856655634] [2019-11-19 22:44:38,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-19 22:44:39,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856655634] [2019-11-19 22:44:39,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820268982] [2019-11-19 22:44:39,430 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:39,493 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:44:39,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:39,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-19 22:44:39,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-19 22:44:39,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:39,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 22 [2019-11-19 22:44:39,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800046871] [2019-11-19 22:44:39,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-19 22:44:39,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:39,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-19 22:44:39,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2019-11-19 22:44:39,545 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 22 states. [2019-11-19 22:44:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:39,812 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-19 22:44:39,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-19 22:44:39,813 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2019-11-19 22:44:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:39,814 INFO L225 Difference]: With dead ends: 60 [2019-11-19 22:44:39,814 INFO L226 Difference]: Without dead ends: 56 [2019-11-19 22:44:39,815 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2019-11-19 22:44:39,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-19 22:44:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-19 22:44:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-19 22:44:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-19 22:44:39,829 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-19 22:44:39,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:39,829 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-19 22:44:39,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-19 22:44:39,830 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-19 22:44:39,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-19 22:44:39,832 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:39,832 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:40,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:40,036 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:40,036 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-19 22:44:40,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:40,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375421038] [2019-11-19 22:44:40,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-19 22:44:40,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375421038] [2019-11-19 22:44:40,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39867196] [2019-11-19 22:44:40,708 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:40,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-19 22:44:40,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:40,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-19 22:44:40,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-19 22:44:40,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:40,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 23 [2019-11-19 22:44:40,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676767976] [2019-11-19 22:44:40,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-19 22:44:40,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:40,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-19 22:44:40,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-11-19 22:44:40,830 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 23 states. [2019-11-19 22:44:41,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:41,135 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-11-19 22:44:41,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-19 22:44:41,135 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 99 [2019-11-19 22:44:41,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:41,136 INFO L225 Difference]: With dead ends: 63 [2019-11-19 22:44:41,136 INFO L226 Difference]: Without dead ends: 59 [2019-11-19 22:44:41,137 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2019-11-19 22:44:41,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-19 22:44:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-19 22:44:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-19 22:44:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-11-19 22:44:41,149 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-11-19 22:44:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:41,150 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-11-19 22:44:41,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-19 22:44:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-11-19 22:44:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-19 22:44:41,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:41,151 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:41,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:41,361 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:41,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:41,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-11-19 22:44:41,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:41,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795841444] [2019-11-19 22:44:41,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-19 22:44:42,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795841444] [2019-11-19 22:44:42,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94366224] [2019-11-19 22:44:42,060 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:42,129 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 22:44:42,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:42,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-19 22:44:42,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-19 22:44:42,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:42,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 24 [2019-11-19 22:44:42,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21361550] [2019-11-19 22:44:42,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-19 22:44:42,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:42,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-19 22:44:42,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2019-11-19 22:44:42,195 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 24 states. [2019-11-19 22:44:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:42,549 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-11-19 22:44:42,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-19 22:44:42,550 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2019-11-19 22:44:42,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:42,551 INFO L225 Difference]: With dead ends: 66 [2019-11-19 22:44:42,551 INFO L226 Difference]: Without dead ends: 62 [2019-11-19 22:44:42,552 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=539, Invalid=1101, Unknown=0, NotChecked=0, Total=1640 [2019-11-19 22:44:42,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-19 22:44:42,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-19 22:44:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-19 22:44:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-11-19 22:44:42,557 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-11-19 22:44:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:42,557 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-11-19 22:44:42,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-19 22:44:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-11-19 22:44:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-19 22:44:42,562 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:42,562 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:42,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:42,766 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:42,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:42,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-11-19 22:44:42,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:42,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969732381] [2019-11-19 22:44:42,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-19 22:44:43,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969732381] [2019-11-19 22:44:43,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262257242] [2019-11-19 22:44:43,464 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:43,539 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-19 22:44:43,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:43,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-19 22:44:43,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-19 22:44:43,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:43,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 25 [2019-11-19 22:44:43,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208483395] [2019-11-19 22:44:43,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-19 22:44:43,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:43,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-19 22:44:43,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-11-19 22:44:43,598 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 25 states. [2019-11-19 22:44:43,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:43,944 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-11-19 22:44:43,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-19 22:44:43,945 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 111 [2019-11-19 22:44:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:43,946 INFO L225 Difference]: With dead ends: 69 [2019-11-19 22:44:43,946 INFO L226 Difference]: Without dead ends: 65 [2019-11-19 22:44:43,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=1209, Unknown=0, NotChecked=0, Total=1806 [2019-11-19 22:44:43,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-19 22:44:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-19 22:44:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-19 22:44:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-11-19 22:44:43,954 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-11-19 22:44:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:43,954 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-11-19 22:44:43,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-19 22:44:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-11-19 22:44:43,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-19 22:44:43,956 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:43,956 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:44,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:44,156 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:44,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:44,157 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-11-19 22:44:44,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:44,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535981058] [2019-11-19 22:44:44,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-19 22:44:45,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535981058] [2019-11-19 22:44:45,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572549010] [2019-11-19 22:44:45,069 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:45,176 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-19 22:44:45,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:45,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-19 22:44:45,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-19 22:44:45,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:45,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2019-11-19 22:44:45,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381358014] [2019-11-19 22:44:45,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-19 22:44:45,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:45,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-19 22:44:45,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2019-11-19 22:44:45,271 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 26 states. [2019-11-19 22:44:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:45,661 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-11-19 22:44:45,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-19 22:44:45,662 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 117 [2019-11-19 22:44:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:45,663 INFO L225 Difference]: With dead ends: 72 [2019-11-19 22:44:45,663 INFO L226 Difference]: Without dead ends: 68 [2019-11-19 22:44:45,664 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=658, Invalid=1322, Unknown=0, NotChecked=0, Total=1980 [2019-11-19 22:44:45,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-19 22:44:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-19 22:44:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-19 22:44:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-11-19 22:44:45,669 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-11-19 22:44:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:45,670 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-11-19 22:44:45,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-19 22:44:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-11-19 22:44:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-19 22:44:45,671 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:45,671 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:45,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:45,872 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:45,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:45,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-11-19 22:44:45,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:45,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479553793] [2019-11-19 22:44:45,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-19 22:44:46,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479553793] [2019-11-19 22:44:46,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733154964] [2019-11-19 22:44:46,746 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:46,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-19 22:44:46,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-19 22:44:46,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:46,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 27 [2019-11-19 22:44:46,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014973123] [2019-11-19 22:44:46,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-19 22:44:46,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:46,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-19 22:44:46,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2019-11-19 22:44:46,872 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 27 states. [2019-11-19 22:44:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:47,149 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-11-19 22:44:47,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-19 22:44:47,149 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2019-11-19 22:44:47,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:47,150 INFO L225 Difference]: With dead ends: 75 [2019-11-19 22:44:47,150 INFO L226 Difference]: Without dead ends: 71 [2019-11-19 22:44:47,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=722, Invalid=1440, Unknown=0, NotChecked=0, Total=2162 [2019-11-19 22:44:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-19 22:44:47,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-19 22:44:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-19 22:44:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-11-19 22:44:47,155 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-11-19 22:44:47,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:47,156 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-11-19 22:44:47,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-19 22:44:47,156 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-11-19 22:44:47,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-19 22:44:47,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:47,157 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:47,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:47,358 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:47,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:47,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-11-19 22:44:47,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:47,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027040774] [2019-11-19 22:44:47,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-11-19 22:44:48,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027040774] [2019-11-19 22:44:48,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734069500] [2019-11-19 22:44:48,260 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:48,317 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:44:48,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:48,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-19 22:44:48,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-11-19 22:44:48,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:48,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 28 [2019-11-19 22:44:48,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995518490] [2019-11-19 22:44:48,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-19 22:44:48,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:48,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-19 22:44:48,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2019-11-19 22:44:48,372 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 28 states. [2019-11-19 22:44:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:48,694 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2019-11-19 22:44:48,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-19 22:44:48,694 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 129 [2019-11-19 22:44:48,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:48,695 INFO L225 Difference]: With dead ends: 78 [2019-11-19 22:44:48,695 INFO L226 Difference]: Without dead ends: 74 [2019-11-19 22:44:48,696 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=789, Invalid=1563, Unknown=0, NotChecked=0, Total=2352 [2019-11-19 22:44:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-19 22:44:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-11-19 22:44:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-19 22:44:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2019-11-19 22:44:48,701 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2019-11-19 22:44:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:48,701 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2019-11-19 22:44:48,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-19 22:44:48,702 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2019-11-19 22:44:48,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-19 22:44:48,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:48,703 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:48,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:48,907 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:48,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1463802477, now seen corresponding path program 21 times [2019-11-19 22:44:48,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:48,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808625521] [2019-11-19 22:44:48,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-19 22:44:50,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808625521] [2019-11-19 22:44:50,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461690784] [2019-11-19 22:44:50,189 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:50,310 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-19 22:44:50,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:50,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-19 22:44:50,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-19 22:44:50,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:50,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 29 [2019-11-19 22:44:50,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889970585] [2019-11-19 22:44:50,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-19 22:44:50,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:50,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-19 22:44:50,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2019-11-19 22:44:50,395 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 29 states. [2019-11-19 22:44:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:50,824 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2019-11-19 22:44:50,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-19 22:44:50,826 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 135 [2019-11-19 22:44:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:50,827 INFO L225 Difference]: With dead ends: 81 [2019-11-19 22:44:50,827 INFO L226 Difference]: Without dead ends: 77 [2019-11-19 22:44:50,828 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=859, Invalid=1691, Unknown=0, NotChecked=0, Total=2550 [2019-11-19 22:44:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-19 22:44:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-11-19 22:44:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-19 22:44:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2019-11-19 22:44:50,833 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 135 [2019-11-19 22:44:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:50,833 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2019-11-19 22:44:50,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-19 22:44:50,833 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2019-11-19 22:44:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-19 22:44:50,834 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:50,834 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:51,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:51,035 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:51,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:51,035 INFO L82 PathProgramCache]: Analyzing trace with hash -555819607, now seen corresponding path program 22 times [2019-11-19 22:44:51,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:51,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261825869] [2019-11-19 22:44:51,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-11-19 22:44:52,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261825869] [2019-11-19 22:44:52,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770354457] [2019-11-19 22:44:52,210 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:52,284 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 22:44:52,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:52,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-19 22:44:52,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-11-19 22:44:52,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:52,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 30 [2019-11-19 22:44:52,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567315900] [2019-11-19 22:44:52,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-19 22:44:52,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:52,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-19 22:44:52,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2019-11-19 22:44:52,362 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 30 states. [2019-11-19 22:44:52,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:52,707 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2019-11-19 22:44:52,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-19 22:44:52,708 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 141 [2019-11-19 22:44:52,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:52,709 INFO L225 Difference]: With dead ends: 84 [2019-11-19 22:44:52,709 INFO L226 Difference]: Without dead ends: 80 [2019-11-19 22:44:52,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=932, Invalid=1824, Unknown=0, NotChecked=0, Total=2756 [2019-11-19 22:44:52,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-19 22:44:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-11-19 22:44:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-19 22:44:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2019-11-19 22:44:52,717 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 141 [2019-11-19 22:44:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:52,718 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2019-11-19 22:44:52,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-19 22:44:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2019-11-19 22:44:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-19 22:44:52,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:52,720 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:52,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:52,923 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:52,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:52,924 INFO L82 PathProgramCache]: Analyzing trace with hash -945685357, now seen corresponding path program 23 times [2019-11-19 22:44:52,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:52,924 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776224712] [2019-11-19 22:44:52,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-11-19 22:44:54,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776224712] [2019-11-19 22:44:54,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991611972] [2019-11-19 22:44:54,173 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:54,253 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-19 22:44:54,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:54,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-19 22:44:54,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-11-19 22:44:54,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:54,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28] total 31 [2019-11-19 22:44:54,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344334336] [2019-11-19 22:44:54,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-19 22:44:54,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:54,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-19 22:44:54,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=594, Unknown=0, NotChecked=0, Total=930 [2019-11-19 22:44:54,328 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 31 states. [2019-11-19 22:44:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:54,672 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2019-11-19 22:44:54,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-19 22:44:54,672 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 147 [2019-11-19 22:44:54,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:54,674 INFO L225 Difference]: With dead ends: 87 [2019-11-19 22:44:54,674 INFO L226 Difference]: Without dead ends: 83 [2019-11-19 22:44:54,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1008, Invalid=1962, Unknown=0, NotChecked=0, Total=2970 [2019-11-19 22:44:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-19 22:44:54,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-11-19 22:44:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-19 22:44:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2019-11-19 22:44:54,679 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 147 [2019-11-19 22:44:54,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:54,679 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2019-11-19 22:44:54,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-19 22:44:54,679 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2019-11-19 22:44:54,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-19 22:44:54,680 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:54,680 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:54,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:54,883 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:54,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:54,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1588806697, now seen corresponding path program 24 times [2019-11-19 22:44:54,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:54,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745125189] [2019-11-19 22:44:54,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:44:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-11-19 22:44:56,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745125189] [2019-11-19 22:44:56,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519103040] [2019-11-19 22:44:56,226 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:56,322 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-19 22:44:56,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:44:56,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 52 conjunts are in the unsatisfiable core [2019-11-19 22:44:56,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:44:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-11-19 22:44:56,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:44:56,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 32 [2019-11-19 22:44:56,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404009937] [2019-11-19 22:44:56,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-19 22:44:56,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:44:56,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-19 22:44:56,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2019-11-19 22:44:56,412 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 32 states. [2019-11-19 22:44:56,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:44:56,887 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2019-11-19 22:44:56,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-19 22:44:56,888 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 153 [2019-11-19 22:44:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:44:56,889 INFO L225 Difference]: With dead ends: 90 [2019-11-19 22:44:56,889 INFO L226 Difference]: Without dead ends: 86 [2019-11-19 22:44:56,891 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1087, Invalid=2105, Unknown=0, NotChecked=0, Total=3192 [2019-11-19 22:44:56,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-19 22:44:56,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-11-19 22:44:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-19 22:44:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2019-11-19 22:44:56,897 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 153 [2019-11-19 22:44:56,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:44:56,897 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2019-11-19 22:44:56,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-19 22:44:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2019-11-19 22:44:56,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-19 22:44:56,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:44:56,900 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:44:57,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:44:57,104 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:44:57,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:44:57,104 INFO L82 PathProgramCache]: Analyzing trace with hash 959677331, now seen corresponding path program 25 times [2019-11-19 22:44:57,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:44:57,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022567965] [2019-11-19 22:44:57,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:44:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:44:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:44:57,211 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:44:57,211 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 22:44:57,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 10:44:57 BoogieIcfgContainer [2019-11-19 22:44:57,291 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 22:44:57,292 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 22:44:57,292 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 22:44:57,293 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 22:44:57,294 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:44:27" (3/4) ... [2019-11-19 22:44:57,296 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 22:44:57,408 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_eccd8f7a-f18e-4043-984e-a9b83730906e/bin/uautomizer/witness.graphml [2019-11-19 22:44:57,408 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 22:44:57,411 INFO L168 Benchmark]: Toolchain (without parser) took 30920.73 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 577.2 MB). Free memory was 951.4 MB in the beginning and 1.6 GB in the end (delta: -616.8 MB). Peak memory consumption was 680.6 MB. Max. memory is 11.5 GB. [2019-11-19 22:44:57,411 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:44:57,412 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -190.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:44:57,412 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.19 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:44:57,412 INFO L168 Benchmark]: Boogie Preprocessor took 13.01 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:44:57,413 INFO L168 Benchmark]: RCFGBuilder took 279.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:44:57,413 INFO L168 Benchmark]: TraceAbstraction took 30209.69 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 427.3 MB). Free memory was 1.1 GB in the beginning and 846.1 MB in the end (delta: 275.1 MB). Peak memory consumption was 702.4 MB. Max. memory is 11.5 GB. [2019-11-19 22:44:57,414 INFO L168 Benchmark]: Witness Printer took 116.56 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 5.2 MB). Free memory was 846.1 MB in the beginning and 1.6 GB in the end (delta: -722.0 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2019-11-19 22:44:57,416 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 267.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -190.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.19 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.01 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 279.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 30209.69 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 427.3 MB). Free memory was 1.1 GB in the beginning and 846.1 MB in the end (delta: 275.1 MB). Peak memory consumption was 702.4 MB. Max. memory is 11.5 GB. * Witness Printer took 116.56 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 5.2 MB). Free memory was 846.1 MB in the beginning and 1.6 GB in the end (delta: -722.0 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 25; [L13] int b = 0; [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=25] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=25, m=0, n=25] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=24] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=24, m=1, n=24] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=23] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=23, m=2, n=23] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=22] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=22, m=3, n=22] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=21] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=21, m=4, n=21] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=20] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=20, m=5, n=20] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=19] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=19, m=6, n=19] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=18] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=18, m=7, n=18] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=17] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=17, m=8, n=17] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=16] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=16, m=9, n=16] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=15, m=10, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=14, m=11, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=13, m=12, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=12, m=13, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=11, m=14, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=10, m=15, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=9, m=16, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=8, m=17, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=7, m=18, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=6, m=19, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=20, \old(n)=5, m=20, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=21, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=21, \old(n)=4, m=21, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=22, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=22, \old(n)=3, m=22, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=23, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=23, \old(n)=2, m=23, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=24, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=24, \old(n)=1, m=24, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=25, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=25, \old(n)=0, \result=25, m=25, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=24, \old(n)=1, m=24, n=1, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=23, \old(n)=2, m=23, n=2, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=22, \old(n)=3, m=22, n=3, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=21, \old(n)=4, m=21, n=4, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=5, m=20, n=5, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=6, m=19, n=6, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=7, m=18, n=7, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=8, m=17, n=8, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=9, m=16, n=9, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=10, m=15, n=10, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=11, m=14, n=11, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=12, m=13, n=12, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=13, m=12, n=13, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=14, m=11, n=14, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=15, m=10, n=15, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=16, m=9, n=16, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=17, m=8, n=17, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=18, m=7, n=18, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=19, m=6, n=19, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=20, m=5, n=20, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=21, m=4, n=21, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=22, m=3, n=22, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=23, m=2, n=23, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=24, m=1, n=24, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=25, m=0, n=25, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 30.1s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 202 SDtfs, 1131 SDslu, 1350 SDs, 0 SdLazy, 1561 SolverSat, 250 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3392 GetRequests, 2618 SyntacticMatches, 0 SemanticMatches, 774 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5200 ImplicationChecksByTransitivity, 12.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 15.8s InterpolantComputationTime, 4200 NumberOfCodeBlocks, 4200 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 3992 ConstructedInterpolants, 0 QuantifiedInterpolants, 1105472 SizeOfPredicates, 348 NumberOfNonLiveVariables, 6096 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...