./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/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 ffdaeeffc8c5fdb555812137dbba1199bd1a626d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 23:43:47,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:43:47,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:43:47,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:43:47,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:43:47,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:43:47,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:43:47,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:43:47,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:43:47,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:43:47,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:43:47,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:43:47,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:43:47,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:43:47,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:43:47,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:43:47,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:43:47,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:43:47,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:43:47,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:43:47,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:43:47,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:43:47,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:43:47,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:43:47,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:43:47,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:43:47,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:43:47,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:43:47,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:43:47,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:43:47,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:43:47,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:43:47,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:43:47,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:43:47,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:43:47,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:43:47,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:43:47,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:43:47,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:43:47,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:43:47,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:43:47,572 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 23:43:47,604 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:43:47,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:43:47,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:43:47,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:43:47,606 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:43:47,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:43:47,607 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 23:43:47,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:43:47,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 23:43:47,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:43:47,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:43:47,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:43:47,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:43:47,609 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 23:43:47,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:43:47,609 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:43:47,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:43:47,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:43:47,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:43:47,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:43:47,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:43:47,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:43:47,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:43:47,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:43:47,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:43:47,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:43:47,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 23:43:47,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:43:47,613 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_cee96282-1074-4335-97c8-fccabf4047a5/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 -> ffdaeeffc8c5fdb555812137dbba1199bd1a626d [2019-11-15 23:43:47,655 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:43:47,667 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:43:47,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:43:47,673 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:43:47,673 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:43:47,674 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2019-11-15 23:43:47,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/bin/uautomizer/data/d661cac26/a79d342983484c0a8cc6ec88b9b26884/FLAG7e8831aeb [2019-11-15 23:43:48,157 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:43:48,158 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2019-11-15 23:43:48,165 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/bin/uautomizer/data/d661cac26/a79d342983484c0a8cc6ec88b9b26884/FLAG7e8831aeb [2019-11-15 23:43:48,506 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/bin/uautomizer/data/d661cac26/a79d342983484c0a8cc6ec88b9b26884 [2019-11-15 23:43:48,509 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:43:48,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:43:48,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:43:48,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:43:48,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:43:48,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:43:48" (1/1) ... [2019-11-15 23:43:48,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22fa19ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:43:48, skipping insertion in model container [2019-11-15 23:43:48,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:43:48" (1/1) ... [2019-11-15 23:43:48,530 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:43:48,548 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:43:48,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:43:48,815 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:43:48,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:43:48,864 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:43:48,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:43:48 WrapperNode [2019-11-15 23:43:48,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:43:48,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:43:48,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:43:48,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:43:48,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:43:48" (1/1) ... [2019-11-15 23:43:48,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:43:48" (1/1) ... [2019-11-15 23:43:48,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:43:48,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:43:48,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:43:48,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:43:48,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:43:48" (1/1) ... [2019-11-15 23:43:48,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:43:48" (1/1) ... [2019-11-15 23:43:48,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:43:48" (1/1) ... [2019-11-15 23:43:48,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:43:48" (1/1) ... [2019-11-15 23:43:48,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:43:48" (1/1) ... [2019-11-15 23:43:48,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:43:48" (1/1) ... [2019-11-15 23:43:48,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:43:48" (1/1) ... [2019-11-15 23:43:48,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:43:48,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:43:48,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:43:48,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:43:48,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:43:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/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 [2019-11-15 23:43:49,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:43:49,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:43:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-15 23:43:49,011 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-15 23:43:49,012 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-15 23:43:49,012 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-15 23:43:49,275 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:43:49,275 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-15 23:43:49,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:43:49 BoogieIcfgContainer [2019-11-15 23:43:49,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:43:49,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:43:49,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:43:49,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:43:49,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:43:48" (1/3) ... [2019-11-15 23:43:49,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0148d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:43:49, skipping insertion in model container [2019-11-15 23:43:49,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:43:48" (2/3) ... [2019-11-15 23:43:49,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0148d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:43:49, skipping insertion in model container [2019-11-15 23:43:49,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:43:49" (3/3) ... [2019-11-15 23:43:49,313 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2019-11-15 23:43:49,323 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:43:49,331 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:43:49,358 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:43:49,381 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:43:49,382 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:43:49,382 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:43:49,382 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:43:49,382 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:43:49,383 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:43:49,383 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:43:49,383 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:43:49,401 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-15 23:43:49,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-15 23:43:49,407 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:43:49,408 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:43:49,410 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:43:49,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:43:49,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-15 23:43:49,424 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:43:49,425 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617695738] [2019-11-15 23:43:49,425 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:49,425 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:49,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:43:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:43:49,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617695738] [2019-11-15 23:43:49,620 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:43:49,621 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 23:43:49,621 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032920682] [2019-11-15 23:43:49,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:43:49,626 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:43:49,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:43:49,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:43:49,644 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-11-15 23:43:49,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:43:49,773 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-15 23:43:49,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:43:49,775 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-15 23:43:49,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:43:49,786 INFO L225 Difference]: With dead ends: 38 [2019-11-15 23:43:49,786 INFO L226 Difference]: Without dead ends: 26 [2019-11-15 23:43:49,790 INFO L600 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 [2019-11-15 23:43:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-15 23:43:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-15 23:43:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 23:43:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-15 23:43:49,835 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-15 23:43:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:43:49,836 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-15 23:43:49,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:43:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-15 23:43:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 23:43:49,838 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:43:49,838 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:43:49,838 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:43:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:43:49,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-15 23:43:49,839 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:43:49,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073014807] [2019-11-15 23:43:49,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:49,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:49,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:43:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:43:49,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073014807] [2019-11-15 23:43:49,908 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:43:49,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 23:43:49,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295620252] [2019-11-15 23:43:49,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:43:49,910 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:43:49,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:43:49,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:43:49,910 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-11-15 23:43:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:43:49,987 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-15 23:43:49,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:43:49,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-15 23:43:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:43:49,990 INFO L225 Difference]: With dead ends: 32 [2019-11-15 23:43:49,990 INFO L226 Difference]: Without dead ends: 28 [2019-11-15 23:43:49,991 INFO L600 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 [2019-11-15 23:43:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-15 23:43:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-15 23:43:49,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 23:43:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-15 23:43:50,000 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-15 23:43:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:43:50,000 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-15 23:43:50,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:43:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-15 23:43:50,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 23:43:50,002 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:43:50,002 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:43:50,003 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:43:50,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:43:50,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-15 23:43:50,003 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:43:50,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696784618] [2019-11-15 23:43:50,004 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:50,004 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:50,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:43:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 23:43:50,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696784618] [2019-11-15 23:43:50,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193475366] [2019-11-15 23:43:50,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/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 [2019-11-15 23:43:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:50,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:43:50,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:43:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 23:43:50,362 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:43:50,362 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-15 23:43:50,362 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006418467] [2019-11-15 23:43:50,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 23:43:50,363 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:43:50,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 23:43:50,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:43:50,364 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 10 states. [2019-11-15 23:43:50,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:43:50,546 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-11-15 23:43:50,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 23:43:50,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-15 23:43:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:43:50,549 INFO L225 Difference]: With dead ends: 59 [2019-11-15 23:43:50,549 INFO L226 Difference]: Without dead ends: 35 [2019-11-15 23:43:50,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:43:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-15 23:43:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-15 23:43:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-15 23:43:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-15 23:43:50,568 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-11-15 23:43:50,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:43:50,569 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-15 23:43:50,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 23:43:50,570 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-15 23:43:50,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 23:43:50,572 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:43:50,573 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:43:50,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:43:50,776 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:43:50,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:43:50,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-15 23:43:50,777 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:43:50,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960099937] [2019-11-15 23:43:50,778 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:50,778 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:50,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:43:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 23:43:50,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960099937] [2019-11-15 23:43:50,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275505111] [2019-11-15 23:43:50,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/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 [2019-11-15 23:43:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:50,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:43:50,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:43:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 23:43:51,035 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:43:51,035 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-15 23:43:51,035 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107821346] [2019-11-15 23:43:51,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 23:43:51,036 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:43:51,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 23:43:51,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:43:51,037 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 10 states. [2019-11-15 23:43:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:43:51,301 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-15 23:43:51,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:43:51,302 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-15 23:43:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:43:51,306 INFO L225 Difference]: With dead ends: 55 [2019-11-15 23:43:51,306 INFO L226 Difference]: Without dead ends: 51 [2019-11-15 23:43:51,307 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:43:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-15 23:43:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-15 23:43:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-15 23:43:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-11-15 23:43:51,321 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-11-15 23:43:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:43:51,322 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-11-15 23:43:51,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 23:43:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-11-15 23:43:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-15 23:43:51,325 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:43:51,325 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:43:51,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:43:51,530 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:43:51,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:43:51,531 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-15 23:43:51,531 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:43:51,531 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557821863] [2019-11-15 23:43:51,531 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:51,532 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:51,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:43:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 23:43:51,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557821863] [2019-11-15 23:43:51,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612372181] [2019-11-15 23:43:51,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/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 [2019-11-15 23:43:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:51,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:43:51,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:43:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 23:43:51,838 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:43:51,838 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-11-15 23:43:51,838 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499653712] [2019-11-15 23:43:51,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 23:43:51,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:43:51,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 23:43:51,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-15 23:43:51,839 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 12 states. [2019-11-15 23:43:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:43:52,305 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-11-15 23:43:52,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-15 23:43:52,305 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-15 23:43:52,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:43:52,309 INFO L225 Difference]: With dead ends: 114 [2019-11-15 23:43:52,309 INFO L226 Difference]: Without dead ends: 68 [2019-11-15 23:43:52,311 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-11-15 23:43:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-15 23:43:52,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-15 23:43:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-15 23:43:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-11-15 23:43:52,331 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-11-15 23:43:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:43:52,331 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-11-15 23:43:52,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 23:43:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-11-15 23:43:52,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-15 23:43:52,335 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:43:52,335 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:43:52,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:43:52,540 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:43:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:43:52,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-11-15 23:43:52,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:43:52,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420802850] [2019-11-15 23:43:52,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:52,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:52,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:43:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 23:43:52,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420802850] [2019-11-15 23:43:52,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026999670] [2019-11-15 23:43:52,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/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 [2019-11-15 23:43:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:52,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:43:52,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:43:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 23:43:52,842 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:43:52,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2019-11-15 23:43:52,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037252447] [2019-11-15 23:43:52,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 23:43:52,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:43:52,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 23:43:52,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-15 23:43:52,844 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 12 states. [2019-11-15 23:43:53,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:43:53,182 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-11-15 23:43:53,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 23:43:53,184 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-15 23:43:53,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:43:53,187 INFO L225 Difference]: With dead ends: 147 [2019-11-15 23:43:53,188 INFO L226 Difference]: Without dead ends: 83 [2019-11-15 23:43:53,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-11-15 23:43:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-15 23:43:53,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-11-15 23:43:53,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-15 23:43:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-11-15 23:43:53,219 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-11-15 23:43:53,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:43:53,220 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-11-15 23:43:53,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 23:43:53,221 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-11-15 23:43:53,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-15 23:43:53,233 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:43:53,234 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:43:53,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:43:53,437 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:43:53,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:43:53,438 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-11-15 23:43:53,438 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:43:53,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371232572] [2019-11-15 23:43:53,439 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:53,439 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:53,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:43:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-15 23:43:53,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371232572] [2019-11-15 23:43:53,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757848219] [2019-11-15 23:43:53,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/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 [2019-11-15 23:43:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:53,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:43:53,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:43:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-15 23:43:53,839 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:43:53,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2019-11-15 23:43:53,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755251745] [2019-11-15 23:43:53,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-15 23:43:53,841 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:43:53,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-15 23:43:53,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-11-15 23:43:53,841 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 15 states. [2019-11-15 23:43:54,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:43:54,303 INFO L93 Difference]: Finished difference Result 163 states and 263 transitions. [2019-11-15 23:43:54,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-15 23:43:54,305 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2019-11-15 23:43:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:43:54,309 INFO L225 Difference]: With dead ends: 163 [2019-11-15 23:43:54,309 INFO L226 Difference]: Without dead ends: 99 [2019-11-15 23:43:54,311 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2019-11-15 23:43:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-15 23:43:54,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2019-11-15 23:43:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-15 23:43:54,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 143 transitions. [2019-11-15 23:43:54,334 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 143 transitions. Word has length 50 [2019-11-15 23:43:54,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:43:54,335 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 143 transitions. [2019-11-15 23:43:54,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-15 23:43:54,335 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 143 transitions. [2019-11-15 23:43:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-15 23:43:54,338 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:43:54,338 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:43:54,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:43:54,544 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:43:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:43:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash -751947822, now seen corresponding path program 1 times [2019-11-15 23:43:54,544 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:43:54,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116699651] [2019-11-15 23:43:54,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:54,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:54,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:43:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-15 23:43:54,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116699651] [2019-11-15 23:43:54,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9182972] [2019-11-15 23:43:54,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/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 [2019-11-15 23:43:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:54,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:43:54,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:43:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-15 23:43:54,890 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:43:54,890 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2019-11-15 23:43:54,891 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670220821] [2019-11-15 23:43:54,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-15 23:43:54,892 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:43:54,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-15 23:43:54,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-11-15 23:43:54,893 INFO L87 Difference]: Start difference. First operand 91 states and 143 transitions. Second operand 15 states. [2019-11-15 23:43:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:43:55,277 INFO L93 Difference]: Finished difference Result 182 states and 293 transitions. [2019-11-15 23:43:55,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-15 23:43:55,278 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-11-15 23:43:55,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:43:55,280 INFO L225 Difference]: With dead ends: 182 [2019-11-15 23:43:55,281 INFO L226 Difference]: Without dead ends: 91 [2019-11-15 23:43:55,282 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-11-15 23:43:55,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-15 23:43:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2019-11-15 23:43:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-15 23:43:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 123 transitions. [2019-11-15 23:43:55,310 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 123 transitions. Word has length 51 [2019-11-15 23:43:55,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:43:55,311 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 123 transitions. [2019-11-15 23:43:55,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-15 23:43:55,311 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 123 transitions. [2019-11-15 23:43:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-15 23:43:55,315 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:43:55,315 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:43:55,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:43:55,519 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:43:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:43:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash -26046796, now seen corresponding path program 1 times [2019-11-15 23:43:55,520 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:43:55,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461257575] [2019-11-15 23:43:55,520 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:55,520 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:55,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:43:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-15 23:43:56,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461257575] [2019-11-15 23:43:56,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307884027] [2019-11-15 23:43:56,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/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 [2019-11-15 23:43:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:56,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-15 23:43:56,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:43:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-15 23:43:56,487 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:43:56,488 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2019-11-15 23:43:56,488 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997477475] [2019-11-15 23:43:56,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-15 23:43:56,491 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:43:56,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-15 23:43:56,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-11-15 23:43:56,492 INFO L87 Difference]: Start difference. First operand 83 states and 123 transitions. Second operand 21 states. [2019-11-15 23:43:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:43:56,808 INFO L93 Difference]: Finished difference Result 118 states and 179 transitions. [2019-11-15 23:43:56,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-15 23:43:56,808 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2019-11-15 23:43:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:43:56,811 INFO L225 Difference]: With dead ends: 118 [2019-11-15 23:43:56,811 INFO L226 Difference]: Without dead ends: 114 [2019-11-15 23:43:56,812 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2019-11-15 23:43:56,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-15 23:43:56,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2019-11-15 23:43:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-15 23:43:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 144 transitions. [2019-11-15 23:43:56,851 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 144 transitions. Word has length 64 [2019-11-15 23:43:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:43:56,852 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 144 transitions. [2019-11-15 23:43:56,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-15 23:43:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 144 transitions. [2019-11-15 23:43:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-15 23:43:56,856 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:43:56,857 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:43:57,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:43:57,060 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:43:57,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:43:57,060 INFO L82 PathProgramCache]: Analyzing trace with hash 262727125, now seen corresponding path program 2 times [2019-11-15 23:43:57,061 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:43:57,061 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897986039] [2019-11-15 23:43:57,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:57,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:57,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:43:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-15 23:43:57,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897986039] [2019-11-15 23:43:57,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978731402] [2019-11-15 23:43:57,394 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/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 [2019-11-15 23:43:57,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:43:57,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:43:57,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:43:57,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:43:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-15 23:43:57,540 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:43:57,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 19 [2019-11-15 23:43:57,541 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111047688] [2019-11-15 23:43:57,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-15 23:43:57,542 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:43:57,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-15 23:43:57,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-11-15 23:43:57,542 INFO L87 Difference]: Start difference. First operand 93 states and 144 transitions. Second operand 19 states. [2019-11-15 23:43:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:43:58,252 INFO L93 Difference]: Finished difference Result 226 states and 419 transitions. [2019-11-15 23:43:58,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-15 23:43:58,253 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2019-11-15 23:43:58,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:43:58,256 INFO L225 Difference]: With dead ends: 226 [2019-11-15 23:43:58,256 INFO L226 Difference]: Without dead ends: 127 [2019-11-15 23:43:58,258 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2019-11-15 23:43:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-15 23:43:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2019-11-15 23:43:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-15 23:43:58,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 154 transitions. [2019-11-15 23:43:58,277 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 154 transitions. Word has length 65 [2019-11-15 23:43:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:43:58,277 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 154 transitions. [2019-11-15 23:43:58,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-15 23:43:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 154 transitions. [2019-11-15 23:43:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-15 23:43:58,280 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:43:58,280 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:43:58,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:43:58,484 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:43:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:43:58,485 INFO L82 PathProgramCache]: Analyzing trace with hash -33377407, now seen corresponding path program 1 times [2019-11-15 23:43:58,485 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:43:58,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956471388] [2019-11-15 23:43:58,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:58,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:58,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:43:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-11-15 23:43:58,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956471388] [2019-11-15 23:43:58,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4427895] [2019-11-15 23:43:58,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/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 [2019-11-15 23:43:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:58,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 23:43:58,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:43:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-15 23:43:58,769 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:43:58,770 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2019-11-15 23:43:58,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849524369] [2019-11-15 23:43:58,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-15 23:43:58,771 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:43:58,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-15 23:43:58,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:43:58,771 INFO L87 Difference]: Start difference. First operand 101 states and 154 transitions. Second operand 13 states. [2019-11-15 23:43:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:43:59,135 INFO L93 Difference]: Finished difference Result 203 states and 340 transitions. [2019-11-15 23:43:59,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 23:43:59,136 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2019-11-15 23:43:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:43:59,137 INFO L225 Difference]: With dead ends: 203 [2019-11-15 23:43:59,137 INFO L226 Difference]: Without dead ends: 54 [2019-11-15 23:43:59,139 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2019-11-15 23:43:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-15 23:43:59,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-11-15 23:43:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-15 23:43:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2019-11-15 23:43:59,155 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 65 [2019-11-15 23:43:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:43:59,156 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2019-11-15 23:43:59,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-15 23:43:59,156 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2019-11-15 23:43:59,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-15 23:43:59,157 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:43:59,157 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-15 23:43:59,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:43:59,361 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:43:59,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:43:59,362 INFO L82 PathProgramCache]: Analyzing trace with hash 458348847, now seen corresponding path program 2 times [2019-11-15 23:43:59,362 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:43:59,362 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122644281] [2019-11-15 23:43:59,362 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:59,362 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:43:59,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:43:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:43:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 34 proven. 39 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-15 23:43:59,559 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122644281] [2019-11-15 23:43:59,559 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190479017] [2019-11-15 23:43:59,559 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/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 [2019-11-15 23:43:59,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:43:59,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:43:59,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 23:43:59,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:43:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 34 proven. 56 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-15 23:43:59,742 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:43:59,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2019-11-15 23:43:59,743 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130203894] [2019-11-15 23:43:59,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-15 23:43:59,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:43:59,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-15 23:43:59,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-11-15 23:43:59,744 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 15 states. [2019-11-15 23:43:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:43:59,873 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2019-11-15 23:43:59,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:43:59,873 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2019-11-15 23:43:59,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:43:59,874 INFO L225 Difference]: With dead ends: 82 [2019-11-15 23:43:59,874 INFO L226 Difference]: Without dead ends: 0 [2019-11-15 23:43:59,875 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-15 23:43:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-15 23:43:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-15 23:43:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-15 23:43:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-15 23:43:59,875 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 89 [2019-11-15 23:43:59,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:43:59,876 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 23:43:59,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-15 23:43:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-15 23:43:59,876 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-15 23:44:00,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:44:00,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-15 23:44:00,827 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2019-11-15 23:44:00,829 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-15 23:44:00,829 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-15 23:44:00,829 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-15 23:44:00,829 INFO L439 ceAbstractionStarter]: At program point L41(lines 35 42) the Hoare annotation is: (<= 4 ULTIMATE.start_main_~x~0) [2019-11-15 23:44:00,829 INFO L443 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-11-15 23:44:00,829 INFO L443 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-11-15 23:44:00,830 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-11-15 23:44:00,830 INFO L439 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 4) (<= 4 ULTIMATE.start_main_~x~0)) [2019-11-15 23:44:00,830 INFO L443 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-11-15 23:44:00,830 INFO L443 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-11-15 23:44:00,830 INFO L446 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-11-15 23:44:00,830 INFO L439 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 3)) (= fibo2_~n |fibo2_#in~n|)) [2019-11-15 23:44:00,830 INFO L443 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-11-15 23:44:00,830 INFO L439 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 3)) (= fibo2_~n |fibo2_#in~n|)) [2019-11-15 23:44:00,831 INFO L443 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-11-15 23:44:00,831 INFO L443 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-11-15 23:44:00,831 INFO L443 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-11-15 23:44:00,831 INFO L443 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-11-15 23:44:00,831 INFO L443 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-11-15 23:44:00,831 INFO L446 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-11-15 23:44:00,831 INFO L439 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2019-11-15 23:44:00,831 INFO L443 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-11-15 23:44:00,832 INFO L439 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (or (<= 4 fibo1_~n) (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1))) (not (<= |fibo1_#in~n| 2)) (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= |fibo1_#in~n| 3) .cse0) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) .cse0) (and .cse0 (<= 5 |fibo1_#in~n|))))) [2019-11-15 23:44:00,832 INFO L443 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-11-15 23:44:00,832 INFO L443 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-11-15 23:44:00,832 INFO L443 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-11-15 23:44:00,832 INFO L443 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-11-15 23:44:00,832 INFO L443 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-11-15 23:44:00,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 11:44:00 BoogieIcfgContainer [2019-11-15 23:44:00,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 23:44:00,847 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 23:44:00,847 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 23:44:00,847 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 23:44:00,848 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:43:49" (3/4) ... [2019-11-15 23:44:00,851 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-15 23:44:00,859 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-11-15 23:44:00,859 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-11-15 23:44:00,864 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-15 23:44:00,864 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-15 23:44:00,929 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cee96282-1074-4335-97c8-fccabf4047a5/bin/uautomizer/witness.graphml [2019-11-15 23:44:00,930 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 23:44:00,931 INFO L168 Benchmark]: Toolchain (without parser) took 12421.24 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 325.6 MB). Free memory was 944.8 MB in the beginning and 1.3 GB in the end (delta: -372.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:44:00,932 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:44:00,933 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.7 MB). Free memory was 944.8 MB in the beginning and 1.2 GB in the end (delta: -212.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-15 23:44:00,933 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:44:00,934 INFO L168 Benchmark]: Boogie Preprocessor took 21.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:44:00,934 INFO L168 Benchmark]: RCFGBuilder took 353.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-11-15 23:44:00,935 INFO L168 Benchmark]: TraceAbstraction took 11559.27 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 158.9 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -183.7 MB). Peak memory consumption was 406.1 MB. Max. memory is 11.5 GB. [2019-11-15 23:44:00,936 INFO L168 Benchmark]: Witness Printer took 82.92 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 11.5 GB. [2019-11-15 23:44:00,939 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 354.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.7 MB). Free memory was 944.8 MB in the beginning and 1.2 GB in the end (delta: -212.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 353.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11559.27 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 158.9 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -183.7 MB). Peak memory consumption was 406.1 MB. Max. memory is 11.5 GB. * Witness Printer took 82.92 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 4 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 11.4s, OverallIterations: 12, TraceHistogramMax: 7, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, HoareTripleCheckerStatistics: 304 SDtfs, 389 SDslu, 2184 SDs, 0 SdLazy, 2576 SolverSat, 294 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 804 GetRequests, 623 SyntacticMatches, 7 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 91 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 350 PreInvPairs, 463 NumberOfFragments, 77 HoareAnnotationTreeSize, 350 FomulaSimplifications, 1966 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1808 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 1019 NumberOfCodeBlocks, 1019 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 997 ConstructedInterpolants, 0 QuantifiedInterpolants, 123909 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1130 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 808/1124 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...