./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/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 d98587a14b872cd91c7aef8f28f1f51cdacaf3d4 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 07:01:12,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 07:01:12,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 07:01:12,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 07:01:12,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 07:01:12,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 07:01:12,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 07:01:12,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 07:01:12,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 07:01:12,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 07:01:12,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 07:01:12,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 07:01:12,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 07:01:12,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 07:01:12,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 07:01:12,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 07:01:12,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 07:01:12,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 07:01:12,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 07:01:12,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 07:01:12,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 07:01:12,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 07:01:12,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 07:01:12,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 07:01:12,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 07:01:12,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 07:01:12,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 07:01:12,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 07:01:12,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 07:01:12,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 07:01:12,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 07:01:12,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 07:01:12,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 07:01:12,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 07:01:12,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 07:01:12,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 07:01:12,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 07:01:12,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 07:01:12,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 07:01:12,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 07:01:12,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 07:01:12,868 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 07:01:12,892 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 07:01:12,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 07:01:12,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 07:01:12,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 07:01:12,904 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 07:01:12,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 07:01:12,905 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 07:01:12,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 07:01:12,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 07:01:12,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 07:01:12,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 07:01:12,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 07:01:12,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 07:01:12,906 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 07:01:12,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 07:01:12,907 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 07:01:12,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 07:01:12,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 07:01:12,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 07:01:12,909 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 07:01:12,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 07:01:12,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 07:01:12,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 07:01:12,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 07:01:12,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 07:01:12,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 07:01:12,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 07:01:12,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 07:01:12,911 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_70187e0a-0be4-44c1-b5c8-a728793dc61d/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 -> d98587a14b872cd91c7aef8f28f1f51cdacaf3d4 [2019-11-20 07:01:13,056 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 07:01:13,073 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 07:01:13,076 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 07:01:13,078 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 07:01:13,078 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 07:01:13,079 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2019-11-20 07:01:13,140 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/bin/uautomizer/data/a22eded1e/dfbbd5f3561640819f45f809731af59d/FLAGa03d41b15 [2019-11-20 07:01:13,463 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 07:01:13,464 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2019-11-20 07:01:13,470 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/bin/uautomizer/data/a22eded1e/dfbbd5f3561640819f45f809731af59d/FLAGa03d41b15 [2019-11-20 07:01:13,864 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/bin/uautomizer/data/a22eded1e/dfbbd5f3561640819f45f809731af59d [2019-11-20 07:01:13,866 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 07:01:13,868 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 07:01:13,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 07:01:13,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 07:01:13,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 07:01:13,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:01:13" (1/1) ... [2019-11-20 07:01:13,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43768e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:01:13, skipping insertion in model container [2019-11-20 07:01:13,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:01:13" (1/1) ... [2019-11-20 07:01:13,884 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 07:01:13,899 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 07:01:14,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 07:01:14,060 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 07:01:14,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 07:01:14,151 INFO L192 MainTranslator]: Completed translation [2019-11-20 07:01:14,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:01:14 WrapperNode [2019-11-20 07:01:14,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 07:01:14,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 07:01:14,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 07:01:14,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 07:01:14,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:01:14" (1/1) ... [2019-11-20 07:01:14,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:01:14" (1/1) ... [2019-11-20 07:01:14,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 07:01:14,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 07:01:14,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 07:01:14,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 07:01:14,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:01:14" (1/1) ... [2019-11-20 07:01:14,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:01:14" (1/1) ... [2019-11-20 07:01:14,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:01:14" (1/1) ... [2019-11-20 07:01:14,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:01:14" (1/1) ... [2019-11-20 07:01:14,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:01:14" (1/1) ... [2019-11-20 07:01:14,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:01:14" (1/1) ... [2019-11-20 07:01:14,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:01:14" (1/1) ... [2019-11-20 07:01:14,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 07:01:14,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 07:01:14,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 07:01:14,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 07:01:14,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:01:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/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 [2019-11-20 07:01:14,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 07:01:14,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 07:01:14,270 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-20 07:01:14,270 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-20 07:01:14,271 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-20 07:01:14,272 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-20 07:01:14,477 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 07:01:14,477 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 07:01:14,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:01:14 BoogieIcfgContainer [2019-11-20 07:01:14,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 07:01:14,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 07:01:14,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 07:01:14,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 07:01:14,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:01:13" (1/3) ... [2019-11-20 07:01:14,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@614bffb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:01:14, skipping insertion in model container [2019-11-20 07:01:14,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:01:14" (2/3) ... [2019-11-20 07:01:14,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@614bffb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:01:14, skipping insertion in model container [2019-11-20 07:01:14,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:01:14" (3/3) ... [2019-11-20 07:01:14,493 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2019-11-20 07:01:14,503 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 07:01:14,509 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 07:01:14,520 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 07:01:14,544 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 07:01:14,544 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 07:01:14,544 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 07:01:14,544 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 07:01:14,545 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 07:01:14,545 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 07:01:14,545 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 07:01:14,545 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 07:01:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-20 07:01:14,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 07:01:14,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:01:14,571 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:01:14,571 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:01:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:01:14,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-20 07:01:14,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:01:14,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876102867] [2019-11-20 07:01:14,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:01:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:01:14,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876102867] [2019-11-20 07:01:14,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:01:14,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-20 07:01:14,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508911555] [2019-11-20 07:01:14,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 07:01:14,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:01:14,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 07:01:14,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 07:01:14,822 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2019-11-20 07:01:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:01:14,960 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-20 07:01:14,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 07:01:14,963 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-20 07:01:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:01:14,973 INFO L225 Difference]: With dead ends: 38 [2019-11-20 07:01:14,973 INFO L226 Difference]: Without dead ends: 26 [2019-11-20 07:01:14,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-20 07:01:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-20 07:01:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-20 07:01:15,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 07:01:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-20 07:01:15,030 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-20 07:01:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:01:15,030 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-20 07:01:15,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 07:01:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-20 07:01:15,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 07:01:15,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:01:15,032 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:01:15,032 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:01:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:01:15,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-20 07:01:15,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:01:15,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580417248] [2019-11-20 07:01:15,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:01:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:01:15,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580417248] [2019-11-20 07:01:15,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:01:15,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-20 07:01:15,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443343882] [2019-11-20 07:01:15,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 07:01:15,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:01:15,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 07:01:15,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 07:01:15,130 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2019-11-20 07:01:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:01:15,261 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-20 07:01:15,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 07:01:15,263 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-20 07:01:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:01:15,264 INFO L225 Difference]: With dead ends: 32 [2019-11-20 07:01:15,264 INFO L226 Difference]: Without dead ends: 28 [2019-11-20 07:01:15,265 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-20 07:01:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-20 07:01:15,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-20 07:01:15,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 07:01:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-20 07:01:15,271 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-20 07:01:15,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:01:15,271 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-20 07:01:15,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 07:01:15,271 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-20 07:01:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 07:01:15,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:01:15,273 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:01:15,273 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:01:15,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:01:15,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-20 07:01:15,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:01:15,274 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919365165] [2019-11-20 07:01:15,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:01:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:01:15,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919365165] [2019-11-20 07:01:15,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092609590] [2019-11-20 07:01:15,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/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 [2019-11-20 07:01:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:15,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 07:01:15,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:01:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:01:15,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:01:15,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-11-20 07:01:15,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887913530] [2019-11-20 07:01:15,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 07:01:15,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:01:15,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 07:01:15,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 07:01:15,587 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 12 states. [2019-11-20 07:01:15,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:01:15,804 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-11-20 07:01:15,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 07:01:15,806 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-11-20 07:01:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:01:15,807 INFO L225 Difference]: With dead ends: 59 [2019-11-20 07:01:15,808 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 07:01:15,809 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-20 07:01:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 07:01:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-20 07:01:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 07:01:15,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-20 07:01:15,831 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-11-20 07:01:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:01:15,832 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-20 07:01:15,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 07:01:15,833 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-20 07:01:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 07:01:15,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:01:15,837 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:01:16,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:01:16,041 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:01:16,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:01:16,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-20 07:01:16,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:01:16,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354689776] [2019-11-20 07:01:16,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:01:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:01:16,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354689776] [2019-11-20 07:01:16,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118857879] [2019-11-20 07:01:16,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/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 [2019-11-20 07:01:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:16,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 07:01:16,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:01:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:01:16,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:01:16,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-11-20 07:01:16,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235298255] [2019-11-20 07:01:16,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 07:01:16,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:01:16,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 07:01:16,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 07:01:16,315 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 12 states. [2019-11-20 07:01:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:01:16,578 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-20 07:01:16,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 07:01:16,579 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-20 07:01:16,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:01:16,583 INFO L225 Difference]: With dead ends: 55 [2019-11-20 07:01:16,583 INFO L226 Difference]: Without dead ends: 51 [2019-11-20 07:01:16,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-20 07:01:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-20 07:01:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-20 07:01:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-20 07:01:16,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-11-20 07:01:16,602 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-11-20 07:01:16,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:01:16,603 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-11-20 07:01:16,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 07:01:16,603 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-11-20 07:01:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 07:01:16,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:01:16,607 INFO L410 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] [2019-11-20 07:01:16,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:01:16,808 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:01:16,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:01:16,809 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-20 07:01:16,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:01:16,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023445673] [2019-11-20 07:01:16,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:01:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 07:01:16,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023445673] [2019-11-20 07:01:16,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177643775] [2019-11-20 07:01:16,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/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 [2019-11-20 07:01:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:17,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 07:01:17,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:01:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 07:01:17,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:01:17,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2019-11-20 07:01:17,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732261108] [2019-11-20 07:01:17,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 07:01:17,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:01:17,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 07:01:17,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-20 07:01:17,091 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 14 states. [2019-11-20 07:01:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:01:17,532 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-11-20 07:01:17,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 07:01:17,533 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2019-11-20 07:01:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:01:17,536 INFO L225 Difference]: With dead ends: 114 [2019-11-20 07:01:17,536 INFO L226 Difference]: Without dead ends: 68 [2019-11-20 07:01:17,538 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2019-11-20 07:01:17,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-20 07:01:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-20 07:01:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-20 07:01:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-11-20 07:01:17,565 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-11-20 07:01:17,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:01:17,565 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-11-20 07:01:17,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 07:01:17,565 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-11-20 07:01:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 07:01:17,568 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:01:17,568 INFO L410 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] [2019-11-20 07:01:17,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:01:17,776 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:01:17,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:01:17,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-11-20 07:01:17,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:01:17,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282657026] [2019-11-20 07:01:17,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:01:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 07:01:17,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282657026] [2019-11-20 07:01:17,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357017445] [2019-11-20 07:01:17,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/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 [2019-11-20 07:01:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:18,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 07:01:18,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:01:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 07:01:18,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:01:18,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-11-20 07:01:18,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227160302] [2019-11-20 07:01:18,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 07:01:18,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:01:18,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 07:01:18,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-20 07:01:18,121 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 14 states. [2019-11-20 07:01:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:01:18,476 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-11-20 07:01:18,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 07:01:18,476 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-11-20 07:01:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:01:18,479 INFO L225 Difference]: With dead ends: 147 [2019-11-20 07:01:18,479 INFO L226 Difference]: Without dead ends: 83 [2019-11-20 07:01:18,482 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2019-11-20 07:01:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-20 07:01:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-11-20 07:01:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-20 07:01:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-11-20 07:01:18,517 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-11-20 07:01:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:01:18,518 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-11-20 07:01:18,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 07:01:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-11-20 07:01:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-20 07:01:18,528 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:01:18,529 INFO L410 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] [2019-11-20 07:01:18,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:01:18,736 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:01:18,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:01:18,737 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-11-20 07:01:18,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:01:18,737 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309752540] [2019-11-20 07:01:18,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:01:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-20 07:01:18,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309752540] [2019-11-20 07:01:18,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437202773] [2019-11-20 07:01:18,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/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 [2019-11-20 07:01:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:18,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 07:01:18,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:01:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 07:01:19,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:01:19,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2019-11-20 07:01:19,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164819468] [2019-11-20 07:01:19,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 07:01:19,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:01:19,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 07:01:19,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-11-20 07:01:19,110 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 18 states. [2019-11-20 07:01:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:01:19,676 INFO L93 Difference]: Finished difference Result 164 states and 279 transitions. [2019-11-20 07:01:19,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 07:01:19,677 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2019-11-20 07:01:19,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:01:19,680 INFO L225 Difference]: With dead ends: 164 [2019-11-20 07:01:19,680 INFO L226 Difference]: Without dead ends: 100 [2019-11-20 07:01:19,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2019-11-20 07:01:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-20 07:01:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2019-11-20 07:01:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-20 07:01:19,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 145 transitions. [2019-11-20 07:01:19,725 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 145 transitions. Word has length 50 [2019-11-20 07:01:19,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:01:19,726 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 145 transitions. [2019-11-20 07:01:19,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 07:01:19,726 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 145 transitions. [2019-11-20 07:01:19,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-20 07:01:19,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:01:19,734 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:01:19,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:01:19,937 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:01:19,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:01:19,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1917551255, now seen corresponding path program 1 times [2019-11-20 07:01:19,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:01:19,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323123887] [2019-11-20 07:01:19,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:01:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 33 proven. 58 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-20 07:01:20,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323123887] [2019-11-20 07:01:20,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104374206] [2019-11-20 07:01:20,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/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 [2019-11-20 07:01:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:20,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 07:01:20,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:01:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 13 proven. 90 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-20 07:01:20,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:01:20,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2019-11-20 07:01:20,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897935777] [2019-11-20 07:01:20,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 07:01:20,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:01:20,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 07:01:20,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2019-11-20 07:01:20,517 INFO L87 Difference]: Start difference. First operand 89 states and 145 transitions. Second operand 20 states. [2019-11-20 07:01:21,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:01:21,360 INFO L93 Difference]: Finished difference Result 207 states and 388 transitions. [2019-11-20 07:01:21,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 07:01:21,360 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2019-11-20 07:01:21,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:01:21,364 INFO L225 Difference]: With dead ends: 207 [2019-11-20 07:01:21,364 INFO L226 Difference]: Without dead ends: 114 [2019-11-20 07:01:21,366 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2019-11-20 07:01:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-20 07:01:21,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2019-11-20 07:01:21,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-20 07:01:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 135 transitions. [2019-11-20 07:01:21,401 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 135 transitions. Word has length 91 [2019-11-20 07:01:21,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:01:21,402 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 135 transitions. [2019-11-20 07:01:21,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 07:01:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 135 transitions. [2019-11-20 07:01:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-20 07:01:21,407 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:01:21,408 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 07:01:21,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:01:21,611 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:01:21,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:01:21,612 INFO L82 PathProgramCache]: Analyzing trace with hash -463941571, now seen corresponding path program 1 times [2019-11-20 07:01:21,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:01:21,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741376389] [2019-11-20 07:01:21,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:01:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 53 proven. 117 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-20 07:01:22,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741376389] [2019-11-20 07:01:22,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319160614] [2019-11-20 07:01:22,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/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 [2019-11-20 07:01:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:22,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 07:01:22,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:01:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-11-20 07:01:22,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:01:22,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2019-11-20 07:01:22,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126378542] [2019-11-20 07:01:22,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 07:01:22,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:01:22,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 07:01:22,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-11-20 07:01:22,269 INFO L87 Difference]: Start difference. First operand 88 states and 135 transitions. Second operand 20 states. [2019-11-20 07:01:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:01:22,942 INFO L93 Difference]: Finished difference Result 209 states and 348 transitions. [2019-11-20 07:01:22,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 07:01:22,942 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2019-11-20 07:01:22,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:01:22,945 INFO L225 Difference]: With dead ends: 209 [2019-11-20 07:01:22,945 INFO L226 Difference]: Without dead ends: 121 [2019-11-20 07:01:22,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2019-11-20 07:01:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-20 07:01:22,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2019-11-20 07:01:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-20 07:01:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 175 transitions. [2019-11-20 07:01:22,965 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 175 transitions. Word has length 119 [2019-11-20 07:01:22,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:01:22,966 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 175 transitions. [2019-11-20 07:01:22,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 07:01:22,966 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 175 transitions. [2019-11-20 07:01:22,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-11-20 07:01:22,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:01:22,970 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 12, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 07:01:23,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:01:23,176 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:01:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:01:23,176 INFO L82 PathProgramCache]: Analyzing trace with hash 332281067, now seen corresponding path program 2 times [2019-11-20 07:01:23,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:01:23,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694759409] [2019-11-20 07:01:23,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:01:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 311 proven. 245 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-11-20 07:01:24,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694759409] [2019-11-20 07:01:24,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734012128] [2019-11-20 07:01:24,053 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/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 [2019-11-20 07:01:24,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 07:01:24,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:01:24,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 07:01:24,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:01:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 89 proven. 154 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2019-11-20 07:01:24,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:01:24,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9] total 29 [2019-11-20 07:01:24,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428595135] [2019-11-20 07:01:24,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-20 07:01:24,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:01:24,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-20 07:01:24,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2019-11-20 07:01:24,446 INFO L87 Difference]: Start difference. First operand 111 states and 175 transitions. Second operand 29 states. [2019-11-20 07:01:25,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:01:25,528 INFO L93 Difference]: Finished difference Result 233 states and 404 transitions. [2019-11-20 07:01:25,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-20 07:01:25,529 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 188 [2019-11-20 07:01:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:01:25,532 INFO L225 Difference]: With dead ends: 233 [2019-11-20 07:01:25,532 INFO L226 Difference]: Without dead ends: 113 [2019-11-20 07:01:25,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=1733, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 07:01:25,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-20 07:01:25,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 97. [2019-11-20 07:01:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-20 07:01:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 131 transitions. [2019-11-20 07:01:25,547 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 131 transitions. Word has length 188 [2019-11-20 07:01:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:01:25,548 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 131 transitions. [2019-11-20 07:01:25,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-20 07:01:25,548 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 131 transitions. [2019-11-20 07:01:25,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-20 07:01:25,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:01:25,551 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:01:25,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:01:25,760 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:01:25,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:01:25,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1392033305, now seen corresponding path program 3 times [2019-11-20 07:01:25,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:01:25,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034075182] [2019-11-20 07:01:25,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:01:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 170 proven. 127 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-20 07:01:26,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034075182] [2019-11-20 07:01:26,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856655634] [2019-11-20 07:01:26,179 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/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 [2019-11-20 07:01:26,222 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 07:01:26,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:01:26,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 07:01:26,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:01:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 110 proven. 28 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2019-11-20 07:01:26,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:01:26,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 21 [2019-11-20 07:01:26,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268356770] [2019-11-20 07:01:26,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 07:01:26,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:01:26,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 07:01:26,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2019-11-20 07:01:26,342 INFO L87 Difference]: Start difference. First operand 97 states and 131 transitions. Second operand 21 states. [2019-11-20 07:01:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:01:26,829 INFO L93 Difference]: Finished difference Result 221 states and 330 transitions. [2019-11-20 07:01:26,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 07:01:26,829 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 147 [2019-11-20 07:01:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:01:26,832 INFO L225 Difference]: With dead ends: 221 [2019-11-20 07:01:26,832 INFO L226 Difference]: Without dead ends: 129 [2019-11-20 07:01:26,833 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2019-11-20 07:01:26,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-20 07:01:26,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 109. [2019-11-20 07:01:26,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-20 07:01:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 148 transitions. [2019-11-20 07:01:26,854 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 148 transitions. Word has length 147 [2019-11-20 07:01:26,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:01:26,856 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 148 transitions. [2019-11-20 07:01:26,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 07:01:26,856 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 148 transitions. [2019-11-20 07:01:26,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-11-20 07:01:26,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:01:26,863 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2019-11-20 07:01:27,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:01:27,067 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:01:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:01:27,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1543071082, now seen corresponding path program 4 times [2019-11-20 07:01:27,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:01:27,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681063227] [2019-11-20 07:01:27,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:01:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:01:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 146 proven. 332 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2019-11-20 07:01:27,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681063227] [2019-11-20 07:01:27,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004284883] [2019-11-20 07:01:27,777 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/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 [2019-11-20 07:01:27,870 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 07:01:27,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:01:27,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 07:01:27,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:01:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 160 proven. 177 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2019-11-20 07:01:28,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:01:28,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11] total 27 [2019-11-20 07:01:28,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850633956] [2019-11-20 07:01:28,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-20 07:01:28,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:01:28,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-20 07:01:28,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2019-11-20 07:01:28,094 INFO L87 Difference]: Start difference. First operand 109 states and 148 transitions. Second operand 27 states. [2019-11-20 07:01:29,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:01:29,258 INFO L93 Difference]: Finished difference Result 284 states and 454 transitions. [2019-11-20 07:01:29,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-20 07:01:29,259 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 200 [2019-11-20 07:01:29,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:01:29,262 INFO L225 Difference]: With dead ends: 284 [2019-11-20 07:01:29,262 INFO L226 Difference]: Without dead ends: 150 [2019-11-20 07:01:29,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2019-11-20 07:01:29,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-20 07:01:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2019-11-20 07:01:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-11-20 07:01:29,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 167 transitions. [2019-11-20 07:01:29,287 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 167 transitions. Word has length 200 [2019-11-20 07:01:29,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:01:29,288 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 167 transitions. [2019-11-20 07:01:29,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-20 07:01:29,288 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 167 transitions. [2019-11-20 07:01:29,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-20 07:01:29,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:01:29,292 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 07:01:29,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 07:01:29,502 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 07:01:29,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:01:29,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1112792143, now seen corresponding path program 5 times [2019-11-20 07:01:29,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:01:29,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497547400] [2019-11-20 07:01:29,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:01:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:01:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:01:29,593 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 07:01:29,594 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 07:01:29,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:01:29 BoogieIcfgContainer [2019-11-20 07:01:29,688 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 07:01:29,688 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 07:01:29,688 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 07:01:29,689 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 07:01:29,689 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:01:14" (3/4) ... [2019-11-20 07:01:29,692 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 07:01:29,814 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_70187e0a-0be4-44c1-b5c8-a728793dc61d/bin/uautomizer/witness.graphml [2019-11-20 07:01:29,814 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 07:01:29,817 INFO L168 Benchmark]: Toolchain (without parser) took 15948.43 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 364.4 MB). Free memory was 950.2 MB in the beginning and 896.0 MB in the end (delta: 54.1 MB). Peak memory consumption was 418.5 MB. Max. memory is 11.5 GB. [2019-11-20 07:01:29,817 INFO L168 Benchmark]: CDTParser took 0.27 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. [2019-11-20 07:01:29,818 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.5 MB). Free memory was 950.2 MB in the beginning and 1.1 GB in the end (delta: -161.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-20 07:01:29,818 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.75 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:01:29,819 INFO L168 Benchmark]: Boogie Preprocessor took 21.83 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2019-11-20 07:01:29,819 INFO L168 Benchmark]: RCFGBuilder took 271.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-11-20 07:01:29,820 INFO L168 Benchmark]: TraceAbstraction took 15208.20 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 245.9 MB). Free memory was 1.1 GB in the beginning and 899.9 MB in the end (delta: 186.0 MB). Peak memory consumption was 431.9 MB. Max. memory is 11.5 GB. [2019-11-20 07:01:29,820 INFO L168 Benchmark]: Witness Printer took 126.06 ms. Allocated memory is still 1.4 GB. Free memory was 899.9 MB in the beginning and 896.0 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 11.5 GB. [2019-11-20 07:01:29,823 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 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 283.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.5 MB). Free memory was 950.2 MB in the beginning and 1.1 GB in the end (delta: -161.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.75 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.83 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 271.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15208.20 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 245.9 MB). Free memory was 1.1 GB in the beginning and 899.9 MB in the end (delta: 186.0 MB). Peak memory consumption was 431.9 MB. Max. memory is 11.5 GB. * Witness Printer took 126.06 ms. Allocated memory is still 1.4 GB. Free memory was 899.9 MB in the beginning and 896.0 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 6; [L37] CALL, EXPR fibo1(x) VAL [\old(n)=6] [L8] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L10] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L18] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L20] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 8 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: UNSAFE, OverallTime: 15.1s, OverallIterations: 13, TraceHistogramMax: 15, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 315 SDtfs, 672 SDslu, 2761 SDs, 0 SdLazy, 4940 SolverSat, 684 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1418 GetRequests, 1161 SyntacticMatches, 1 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=123occurred in iteration=12, 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, 136 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 2014 NumberOfCodeBlocks, 1888 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1819 ConstructedInterpolants, 0 QuantifiedInterpolants, 436701 SizeOfPredicates, 45 NumberOfNonLiveVariables, 1750 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 4906/6398 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...