./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 7f140b11074e684b22c263036fee9fde5b4c087a ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:48:52,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:48:52,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:48:52,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:48:52,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:48:52,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:48:52,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:48:52,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:48:52,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:48:52,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:48:52,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:48:52,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:48:52,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:48:52,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:48:52,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:48:52,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:48:52,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:48:52,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:48:52,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:48:52,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:48:52,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:48:52,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:48:52,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:48:52,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:48:52,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:48:52,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:48:52,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:48:52,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:48:52,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:48:52,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:48:52,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:48:52,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:48:52,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:48:52,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:48:52,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:48:52,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:48:52,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:48:52,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:48:52,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:48:52,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:48:52,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:48:52,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:48:52,652 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:48:52,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:48:52,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:48:52,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:48:52,654 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:48:52,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:48:52,654 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:48:52,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:48:52,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:48:52,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:48:52,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:48:52,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:48:52,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:48:52,655 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:48:52,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:48:52,655 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:48:52,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:48:52,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:48:52,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:48:52,656 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:48:52,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:48:52,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:48:52,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:48:52,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:48:52,657 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:48:52,657 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:48:52,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:48:52,658 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:48:52,658 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_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 -> 7f140b11074e684b22c263036fee9fde5b4c087a [2019-11-25 08:48:52,792 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:48:52,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:48:52,804 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:48:52,805 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:48:52,806 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:48:52,806 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2019-11-25 08:48:52,863 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/bin/uautomizer/data/8076d15bd/d69fbf9718e3430aa4fff5b749bb5801/FLAGde9a5c2f5 [2019-11-25 08:48:53,240 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:48:53,240 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2019-11-25 08:48:53,245 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/bin/uautomizer/data/8076d15bd/d69fbf9718e3430aa4fff5b749bb5801/FLAGde9a5c2f5 [2019-11-25 08:48:53,256 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/bin/uautomizer/data/8076d15bd/d69fbf9718e3430aa4fff5b749bb5801 [2019-11-25 08:48:53,259 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:48:53,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:48:53,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:48:53,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:48:53,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:48:53,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:48:53" (1/1) ... [2019-11-25 08:48:53,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@486f8fd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:53, skipping insertion in model container [2019-11-25 08:48:53,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:48:53" (1/1) ... [2019-11-25 08:48:53,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:48:53,295 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:48:53,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:48:53,482 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:48:53,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:48:53,571 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:48:53,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:53 WrapperNode [2019-11-25 08:48:53,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:48:53,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:48:53,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:48:53,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:48:53,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:53" (1/1) ... [2019-11-25 08:48:53,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:53" (1/1) ... [2019-11-25 08:48:53,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:48:53,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:48:53,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:48:53,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:48:53,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:53" (1/1) ... [2019-11-25 08:48:53,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:53" (1/1) ... [2019-11-25 08:48:53,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:53" (1/1) ... [2019-11-25 08:48:53,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:53" (1/1) ... [2019-11-25 08:48:53,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:53" (1/1) ... [2019-11-25 08:48:53,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:53" (1/1) ... [2019-11-25 08:48:53,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:53" (1/1) ... [2019-11-25 08:48:53,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:48:53,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:48:53,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:48:53,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:48:53,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:48:53,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:48:53,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:48:53,662 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-25 08:48:53,662 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-25 08:48:53,789 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:48:53,789 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:48:53,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:48:53 BoogieIcfgContainer [2019-11-25 08:48:53,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:48:53,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:48:53,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:48:53,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:48:53,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:48:53" (1/3) ... [2019-11-25 08:48:53,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5df726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:48:53, skipping insertion in model container [2019-11-25 08:48:53,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:53" (2/3) ... [2019-11-25 08:48:53,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5df726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:48:53, skipping insertion in model container [2019-11-25 08:48:53,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:48:53" (3/3) ... [2019-11-25 08:48:53,800 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2019-11-25 08:48:53,809 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:48:53,814 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:48:53,824 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:48:53,843 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:48:53,843 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:48:53,843 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:48:53,843 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:48:53,843 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:48:53,843 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:48:53,843 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:48:53,844 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:48:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-25 08:48:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:48:53,860 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:53,861 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:53,861 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:53,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:53,866 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-25 08:48:53,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:53,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504352094] [2019-11-25 08:48:53,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:54,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504352094] [2019-11-25 08:48:54,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:48:54,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:48:54,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060204900] [2019-11-25 08:48:54,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:48:54,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:54,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:48:54,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:48:54,055 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-25 08:48:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:54,146 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-25 08:48:54,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:48:54,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-25 08:48:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:54,154 INFO L225 Difference]: With dead ends: 24 [2019-11-25 08:48:54,154 INFO L226 Difference]: Without dead ends: 14 [2019-11-25 08:48:54,156 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:48:54,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-25 08:48:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-25 08:48:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-25 08:48:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-25 08:48:54,187 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-25 08:48:54,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:54,187 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-25 08:48:54,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:48:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-25 08:48:54,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-25 08:48:54,189 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:54,189 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:54,192 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:54,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:54,193 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-25 08:48:54,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:54,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470235394] [2019-11-25 08:48:54,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:48:54,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470235394] [2019-11-25 08:48:54,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205985555] [2019-11-25 08:48:54,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:48:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:54,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:48:54,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:48:54,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:54,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-25 08:48:54,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939924103] [2019-11-25 08:48:54,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:48:54,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:54,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:48:54,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:48:54,417 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2019-11-25 08:48:54,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:54,488 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-25 08:48:54,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:48:54,488 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-25 08:48:54,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:54,489 INFO L225 Difference]: With dead ends: 21 [2019-11-25 08:48:54,489 INFO L226 Difference]: Without dead ends: 17 [2019-11-25 08:48:54,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:48:54,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-25 08:48:54,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-25 08:48:54,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-25 08:48:54,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-25 08:48:54,494 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-25 08:48:54,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:54,494 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-25 08:48:54,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:48:54,495 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-25 08:48:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-25 08:48:54,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:54,496 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:54,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:54,700 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:54,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-25 08:48:54,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:54,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142977618] [2019-11-25 08:48:54,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-25 08:48:54,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142977618] [2019-11-25 08:48:54,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689917204] [2019-11-25 08:48:54,837 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:48:54,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:48:54,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:54,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:48:54,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-25 08:48:54,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:54,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-25 08:48:54,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436560673] [2019-11-25 08:48:54,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:48:54,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:54,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:48:54,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:48:54,907 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2019-11-25 08:48:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:54,991 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-25 08:48:54,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:48:54,993 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-25 08:48:54,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:54,993 INFO L225 Difference]: With dead ends: 24 [2019-11-25 08:48:54,993 INFO L226 Difference]: Without dead ends: 20 [2019-11-25 08:48:54,994 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:48:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-25 08:48:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-25 08:48:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-25 08:48:54,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-25 08:48:54,999 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-25 08:48:54,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:54,999 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-25 08:48:54,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:48:55,000 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-25 08:48:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-25 08:48:55,005 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:55,005 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:55,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:55,206 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:55,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:55,207 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-25 08:48:55,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:55,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251283602] [2019-11-25 08:48:55,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-25 08:48:55,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251283602] [2019-11-25 08:48:55,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660170082] [2019-11-25 08:48:55,416 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:48:55,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-25 08:48:55,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:55,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:48:55,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-25 08:48:55,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:55,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-25 08:48:55,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509416671] [2019-11-25 08:48:55,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:48:55,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:55,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:48:55,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:48:55,496 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2019-11-25 08:48:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:55,566 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-25 08:48:55,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:48:55,566 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-11-25 08:48:55,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:55,567 INFO L225 Difference]: With dead ends: 27 [2019-11-25 08:48:55,567 INFO L226 Difference]: Without dead ends: 23 [2019-11-25 08:48:55,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:48:55,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-25 08:48:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-25 08:48:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-25 08:48:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-25 08:48:55,575 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-25 08:48:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:55,577 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-25 08:48:55,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:48:55,577 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-25 08:48:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-25 08:48:55,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:55,579 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:55,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:55,788 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:55,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:55,788 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-25 08:48:55,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:55,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435796986] [2019-11-25 08:48:55,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-25 08:48:56,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435796986] [2019-11-25 08:48:56,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77233466] [2019-11-25 08:48:56,009 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:48:56,060 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:48:56,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:56,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:48:56,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-25 08:48:56,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:56,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-25 08:48:56,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367533871] [2019-11-25 08:48:56,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:48:56,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:56,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:48:56,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:48:56,100 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-11-25 08:48:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:56,198 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-25 08:48:56,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:48:56,198 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-11-25 08:48:56,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:56,200 INFO L225 Difference]: With dead ends: 30 [2019-11-25 08:48:56,200 INFO L226 Difference]: Without dead ends: 26 [2019-11-25 08:48:56,200 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:48:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-25 08:48:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-25 08:48:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:48:56,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-25 08:48:56,206 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-25 08:48:56,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:56,206 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-25 08:48:56,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:48:56,207 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-25 08:48:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-25 08:48:56,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:56,208 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:56,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:56,413 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:56,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:56,414 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-25 08:48:56,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:56,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038960022] [2019-11-25 08:48:56,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-25 08:48:56,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038960022] [2019-11-25 08:48:56,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574586928] [2019-11-25 08:48:56,614 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:48:56,657 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-25 08:48:56,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:56,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-25 08:48:56,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-25 08:48:56,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:56,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-25 08:48:56,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360822158] [2019-11-25 08:48:56,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-25 08:48:56,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:56,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:48:56,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:48:56,707 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-25 08:48:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:56,803 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-25 08:48:56,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:48:56,804 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2019-11-25 08:48:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:56,805 INFO L225 Difference]: With dead ends: 33 [2019-11-25 08:48:56,805 INFO L226 Difference]: Without dead ends: 29 [2019-11-25 08:48:56,806 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-11-25 08:48:56,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-25 08:48:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-25 08:48:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-25 08:48:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-25 08:48:56,811 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-25 08:48:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:56,812 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-25 08:48:56,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-25 08:48:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-25 08:48:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-25 08:48:56,813 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:56,813 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:57,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:57,014 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:57,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:57,015 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-25 08:48:57,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:57,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091767823] [2019-11-25 08:48:57,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-25 08:48:57,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091767823] [2019-11-25 08:48:57,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520171007] [2019-11-25 08:48:57,253 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:48:57,292 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-25 08:48:57,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:57,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:48:57,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-25 08:48:57,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:57,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-25 08:48:57,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611788264] [2019-11-25 08:48:57,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:48:57,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:57,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:48:57,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:48:57,339 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2019-11-25 08:48:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:57,460 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-25 08:48:57,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:48:57,460 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-11-25 08:48:57,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:57,461 INFO L225 Difference]: With dead ends: 36 [2019-11-25 08:48:57,461 INFO L226 Difference]: Without dead ends: 32 [2019-11-25 08:48:57,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:48:57,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-25 08:48:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-25 08:48:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-25 08:48:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-25 08:48:57,467 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-25 08:48:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:57,467 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-25 08:48:57,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:48:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-25 08:48:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-25 08:48:57,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:57,477 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:57,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:57,677 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:57,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:57,678 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-25 08:48:57,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:57,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311101985] [2019-11-25 08:48:57,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-25 08:48:57,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311101985] [2019-11-25 08:48:57,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693607796] [2019-11-25 08:48:57,894 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:48:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-25 08:48:57,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-25 08:48:57,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:57,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-25 08:48:57,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443187953] [2019-11-25 08:48:57,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-25 08:48:57,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:57,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-25 08:48:57,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:48:57,993 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 13 states. [2019-11-25 08:48:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:58,140 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-25 08:48:58,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-25 08:48:58,141 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-25 08:48:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:58,142 INFO L225 Difference]: With dead ends: 39 [2019-11-25 08:48:58,142 INFO L226 Difference]: Without dead ends: 35 [2019-11-25 08:48:58,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2019-11-25 08:48:58,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-25 08:48:58,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-25 08:48:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-25 08:48:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-25 08:48:58,147 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-25 08:48:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:58,148 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-25 08:48:58,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-25 08:48:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-25 08:48:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-25 08:48:58,149 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:58,149 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:58,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:58,350 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:58,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:58,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-25 08:48:58,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:58,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241836609] [2019-11-25 08:48:58,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-25 08:48:58,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241836609] [2019-11-25 08:48:58,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100076836] [2019-11-25 08:48:58,560 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:48:58,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:48:58,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:58,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-25 08:48:58,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-25 08:48:58,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:58,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-25 08:48:58,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255332855] [2019-11-25 08:48:58,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-25 08:48:58,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:58,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-25 08:48:58,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:48:58,653 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2019-11-25 08:48:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:58,808 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-25 08:48:58,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:48:58,809 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2019-11-25 08:48:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:58,810 INFO L225 Difference]: With dead ends: 42 [2019-11-25 08:48:58,810 INFO L226 Difference]: Without dead ends: 38 [2019-11-25 08:48:58,811 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2019-11-25 08:48:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-25 08:48:58,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-25 08:48:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-25 08:48:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-25 08:48:58,816 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-25 08:48:58,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:58,817 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-25 08:48:58,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-25 08:48:58,817 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-25 08:48:58,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-25 08:48:58,818 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:58,819 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:59,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:59,019 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:59,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:59,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-25 08:48:59,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:59,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613334658] [2019-11-25 08:48:59,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-25 08:48:59,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613334658] [2019-11-25 08:48:59,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021014616] [2019-11-25 08:48:59,295 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:48:59,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-25 08:48:59,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:59,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-25 08:48:59,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-25 08:48:59,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:59,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-25 08:48:59,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871540494] [2019-11-25 08:48:59,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-25 08:48:59,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:59,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-25 08:48:59,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:48:59,416 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2019-11-25 08:48:59,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:59,574 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-25 08:48:59,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-25 08:48:59,575 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-11-25 08:48:59,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:59,576 INFO L225 Difference]: With dead ends: 45 [2019-11-25 08:48:59,576 INFO L226 Difference]: Without dead ends: 41 [2019-11-25 08:48:59,577 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2019-11-25 08:48:59,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-25 08:48:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-25 08:48:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-25 08:48:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-25 08:48:59,581 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-25 08:48:59,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:59,582 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-25 08:48:59,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-25 08:48:59,582 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-25 08:48:59,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-25 08:48:59,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:59,583 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:59,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:59,792 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:59,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-25 08:48:59,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:59,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322328924] [2019-11-25 08:48:59,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-25 08:49:00,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322328924] [2019-11-25 08:49:00,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298910773] [2019-11-25 08:49:00,100 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:49:00,157 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:49:00,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:49:00,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-25 08:49:00,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-25 08:49:00,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:49:00,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-25 08:49:00,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161757743] [2019-11-25 08:49:00,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-25 08:49:00,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:00,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-25 08:49:00,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:49:00,220 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2019-11-25 08:49:00,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:00,399 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-25 08:49:00,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-25 08:49:00,400 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-11-25 08:49:00,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:00,401 INFO L225 Difference]: With dead ends: 48 [2019-11-25 08:49:00,401 INFO L226 Difference]: Without dead ends: 44 [2019-11-25 08:49:00,402 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2019-11-25 08:49:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-25 08:49:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-25 08:49:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-25 08:49:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-25 08:49:00,407 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-25 08:49:00,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:00,410 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-25 08:49:00,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-25 08:49:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-25 08:49:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-25 08:49:00,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:00,411 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:00,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:00,617 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:00,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-25 08:49:00,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:00,618 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233112595] [2019-11-25 08:49:00,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-25 08:49:01,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233112595] [2019-11-25 08:49:01,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282840471] [2019-11-25 08:49:01,003 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:49:01,059 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-25 08:49:01,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:49:01,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-25 08:49:01,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-25 08:49:01,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:49:01,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-25 08:49:01,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169390164] [2019-11-25 08:49:01,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-25 08:49:01,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:01,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-25 08:49:01,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-11-25 08:49:01,104 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 17 states. [2019-11-25 08:49:01,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:01,256 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-25 08:49:01,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-25 08:49:01,257 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2019-11-25 08:49:01,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:01,257 INFO L225 Difference]: With dead ends: 51 [2019-11-25 08:49:01,258 INFO L226 Difference]: Without dead ends: 47 [2019-11-25 08:49:01,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2019-11-25 08:49:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-25 08:49:01,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-25 08:49:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-25 08:49:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-25 08:49:01,263 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-25 08:49:01,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:01,263 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-25 08:49:01,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-25 08:49:01,264 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-25 08:49:01,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-25 08:49:01,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:01,265 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:01,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:01,468 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:01,468 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-25 08:49:01,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:01,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722863210] [2019-11-25 08:49:01,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-25 08:49:01,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722863210] [2019-11-25 08:49:01,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987933481] [2019-11-25 08:49:01,911 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:49:01,972 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-25 08:49:01,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:49:01,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-25 08:49:01,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-25 08:49:02,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:49:02,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-25 08:49:02,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91113540] [2019-11-25 08:49:02,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-25 08:49:02,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:02,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-25 08:49:02,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:49:02,064 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2019-11-25 08:49:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:02,284 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-25 08:49:02,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-25 08:49:02,284 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2019-11-25 08:49:02,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:02,285 INFO L225 Difference]: With dead ends: 54 [2019-11-25 08:49:02,285 INFO L226 Difference]: Without dead ends: 50 [2019-11-25 08:49:02,286 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2019-11-25 08:49:02,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-25 08:49:02,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-25 08:49:02,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-25 08:49:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-25 08:49:02,291 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-25 08:49:02,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:02,298 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-25 08:49:02,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-25 08:49:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-25 08:49:02,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-25 08:49:02,300 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:02,301 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:02,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:02,504 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:02,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:02,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-25 08:49:02,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:02,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140243990] [2019-11-25 08:49:02,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-25 08:49:02,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140243990] [2019-11-25 08:49:02,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737306048] [2019-11-25 08:49:02,954 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:49:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-25 08:49:03,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-25 08:49:03,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:49:03,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-25 08:49:03,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465376228] [2019-11-25 08:49:03,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-25 08:49:03,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:03,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-25 08:49:03,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:49:03,098 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2019-11-25 08:49:03,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:03,299 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-25 08:49:03,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-25 08:49:03,300 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2019-11-25 08:49:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:03,301 INFO L225 Difference]: With dead ends: 57 [2019-11-25 08:49:03,301 INFO L226 Difference]: Without dead ends: 53 [2019-11-25 08:49:03,302 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2019-11-25 08:49:03,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-25 08:49:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-25 08:49:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-25 08:49:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-25 08:49:03,310 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-25 08:49:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:03,311 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-25 08:49:03,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-25 08:49:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-25 08:49:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-25 08:49:03,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:03,313 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:03,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:03,516 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:03,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-25 08:49:03,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:03,517 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893916904] [2019-11-25 08:49:03,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-25 08:49:04,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893916904] [2019-11-25 08:49:04,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126198789] [2019-11-25 08:49:04,014 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:49:04,083 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:49:04,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:49:04,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-25 08:49:04,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-25 08:49:04,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:49:04,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-25 08:49:04,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251520633] [2019-11-25 08:49:04,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-25 08:49:04,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:04,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-25 08:49:04,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2019-11-25 08:49:04,163 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 20 states. [2019-11-25 08:49:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:04,378 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-25 08:49:04,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-25 08:49:04,378 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2019-11-25 08:49:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:04,379 INFO L225 Difference]: With dead ends: 60 [2019-11-25 08:49:04,379 INFO L226 Difference]: Without dead ends: 56 [2019-11-25 08:49:04,380 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2019-11-25 08:49:04,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-25 08:49:04,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-25 08:49:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-25 08:49:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-25 08:49:04,385 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-25 08:49:04,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:04,386 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-25 08:49:04,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-25 08:49:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-25 08:49:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-25 08:49:04,387 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:04,387 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:04,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:04,588 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:04,588 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-25 08:49:04,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:04,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305291285] [2019-11-25 08:49:04,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-25 08:49:06,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305291285] [2019-11-25 08:49:06,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627542603] [2019-11-25 08:49:06,229 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/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 [2019-11-25 08:49:06,308 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-25 08:49:06,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:49:06,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 137 conjunts are in the unsatisfiable core [2019-11-25 08:49:06,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2019-11-25 08:49:08,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:49:08,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 74 [2019-11-25 08:49:08,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222523442] [2019-11-25 08:49:08,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-11-25 08:49:08,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:08,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-11-25 08:49:08,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=5032, Unknown=0, NotChecked=0, Total=5402 [2019-11-25 08:49:08,222 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 74 states. [2019-11-25 08:49:11,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:11,066 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2019-11-25 08:49:11,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-25 08:49:11,067 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 99 [2019-11-25 08:49:11,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:11,067 INFO L225 Difference]: With dead ends: 59 [2019-11-25 08:49:11,067 INFO L226 Difference]: Without dead ends: 0 [2019-11-25 08:49:11,071 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=902, Invalid=10440, Unknown=0, NotChecked=0, Total=11342 [2019-11-25 08:49:11,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-25 08:49:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-25 08:49:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-25 08:49:11,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-25 08:49:11,071 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 99 [2019-11-25 08:49:11,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:11,071 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:49:11,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-11-25 08:49:11,071 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-25 08:49:11,072 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-25 08:49:11,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:11,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-25 08:49:11,293 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-25 08:49:11,293 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-25 08:49:11,293 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-25 08:49:11,293 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2019-11-25 08:49:11,293 INFO L444 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2019-11-25 08:49:11,293 INFO L444 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-11-25 08:49:11,294 INFO L440 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (= ULTIMATE.start_main_~a~0 15) [2019-11-25 08:49:11,294 INFO L444 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2019-11-25 08:49:11,294 INFO L444 ceAbstractionStarter]: For program point L11(lines 11 18) no Hoare annotation was computed. [2019-11-25 08:49:11,294 INFO L444 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2019-11-25 08:49:11,294 INFO L440 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (<= 1 sum_~n)) [2019-11-25 08:49:11,294 INFO L444 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2019-11-25 08:49:11,294 INFO L444 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2019-11-25 08:49:11,294 INFO L444 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2019-11-25 08:49:11,294 INFO L447 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2019-11-25 08:49:11,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:49:11 BoogieIcfgContainer [2019-11-25 08:49:11,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:49:11,297 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:49:11,297 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:49:11,297 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:49:11,298 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:48:53" (3/4) ... [2019-11-25 08:49:11,302 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-25 08:49:11,306 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2019-11-25 08:49:11,310 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-25 08:49:11,310 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-25 08:49:11,351 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b0134e2b-ef84-4d6d-8ff8-b87f0c3b7558/bin/uautomizer/witness.graphml [2019-11-25 08:49:11,351 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:49:11,352 INFO L168 Benchmark]: Toolchain (without parser) took 18092.20 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 306.7 MB). Free memory was 946.0 MB in the beginning and 1.3 GB in the end (delta: -356.9 MB). Peak memory consumption was 375.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:11,353 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:49:11,353 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:11,354 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.30 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. [2019-11-25 08:49:11,354 INFO L168 Benchmark]: Boogie Preprocessor took 13.99 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. [2019-11-25 08:49:11,354 INFO L168 Benchmark]: RCFGBuilder took 177.63 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:11,355 INFO L168 Benchmark]: TraceAbstraction took 17505.72 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 141.0 MB). Free memory was 1.1 GB in the beginning and 848.5 MB in the end (delta: 260.5 MB). Peak memory consumption was 401.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:11,355 INFO L168 Benchmark]: Witness Printer took 53.81 ms. Allocated memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 34.6 MB). Free memory was 848.5 MB in the beginning and 1.3 GB in the end (delta: -454.4 MB). Peak memory consumption was 5.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:11,357 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 310.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.30 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 13.99 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 177.63 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 17505.72 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 141.0 MB). Free memory was 1.1 GB in the beginning and 848.5 MB in the end (delta: 260.5 MB). Peak memory consumption was 401.5 MB. Max. memory is 11.5 GB. * Witness Printer took 53.81 ms. Allocated memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 34.6 MB). Free memory was 848.5 MB in the beginning and 1.3 GB in the end (delta: -454.4 MB). Peak memory consumption was 5.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 17.4s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 456 SDslu, 1196 SDs, 0 SdLazy, 2197 SolverSat, 153 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1451 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 14 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 1719 NumberOfCodeBlocks, 1719 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1688 ConstructedInterpolants, 0 QuantifiedInterpolants, 386556 SizeOfPredicates, 154 NumberOfNonLiveVariables, 2580 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 4155/7680 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 correct! Received shutdown request...