./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dd317ac0ecdb37853dacea373914a521115465e0 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 07:05:16,819 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 07:05:16,820 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 07:05:16,828 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 07:05:16,828 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 07:05:16,828 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 07:05:16,829 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 07:05:16,830 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 07:05:16,831 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 07:05:16,832 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 07:05:16,833 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 07:05:16,833 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 07:05:16,833 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 07:05:16,834 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 07:05:16,835 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 07:05:16,835 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 07:05:16,836 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 07:05:16,837 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 07:05:16,838 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 07:05:16,839 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 07:05:16,840 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 07:05:16,841 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 07:05:16,842 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 07:05:16,842 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 07:05:16,842 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 07:05:16,843 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 07:05:16,843 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 07:05:16,844 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 07:05:16,844 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 07:05:16,845 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 07:05:16,845 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 07:05:16,845 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 07:05:16,845 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 07:05:16,845 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 07:05:16,846 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 07:05:16,846 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 07:05:16,847 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 07:05:16,853 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 07:05:16,853 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 07:05:16,854 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 07:05:16,854 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 07:05:16,855 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 07:05:16,855 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 07:05:16,855 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 07:05:16,855 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 07:05:16,855 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 07:05:16,855 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 07:05:16,856 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 07:05:16,856 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 07:05:16,856 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 07:05:16,856 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 07:05:16,856 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 07:05:16,856 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 07:05:16,856 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 07:05:16,857 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 07:05:16,857 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 07:05:16,857 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 07:05:16,857 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 07:05:16,857 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 07:05:16,857 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 07:05:16,858 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 07:05:16,858 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 07:05:16,858 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 07:05:16,858 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 07:05:16,858 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 07:05:16,858 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 07:05:16,858 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 07:05:16,859 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd317ac0ecdb37853dacea373914a521115465e0 [2018-11-23 07:05:16,885 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 07:05:16,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 07:05:16,896 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 07:05:16,897 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 07:05:16,898 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 07:05:16,898 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-11-23 07:05:16,942 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/data/74e759397/66873d1ff0874a6398a0dc06bde726e6/FLAG9fc2f623d [2018-11-23 07:05:17,338 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 07:05:17,339 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-11-23 07:05:17,343 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/data/74e759397/66873d1ff0874a6398a0dc06bde726e6/FLAG9fc2f623d [2018-11-23 07:05:17,355 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/data/74e759397/66873d1ff0874a6398a0dc06bde726e6 [2018-11-23 07:05:17,358 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 07:05:17,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 07:05:17,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 07:05:17,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 07:05:17,363 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 07:05:17,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:05:17" (1/1) ... [2018-11-23 07:05:17,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa3a850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:05:17, skipping insertion in model container [2018-11-23 07:05:17,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:05:17" (1/1) ... [2018-11-23 07:05:17,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 07:05:17,389 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 07:05:17,495 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 07:05:17,497 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 07:05:17,507 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 07:05:17,514 INFO L195 MainTranslator]: Completed translation [2018-11-23 07:05:17,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:05:17 WrapperNode [2018-11-23 07:05:17,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 07:05:17,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 07:05:17,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 07:05:17,515 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 07:05:17,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:05:17" (1/1) ... [2018-11-23 07:05:17,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:05:17" (1/1) ... [2018-11-23 07:05:17,527 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 07:05:17,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 07:05:17,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 07:05:17,527 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 07:05:17,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:05:17" (1/1) ... [2018-11-23 07:05:17,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:05:17" (1/1) ... [2018-11-23 07:05:17,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:05:17" (1/1) ... [2018-11-23 07:05:17,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:05:17" (1/1) ... [2018-11-23 07:05:17,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:05:17" (1/1) ... [2018-11-23 07:05:17,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:05:17" (1/1) ... [2018-11-23 07:05:17,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:05:17" (1/1) ... [2018-11-23 07:05:17,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 07:05:17,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 07:05:17,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 07:05:17,537 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 07:05:17,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:05:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 07:05:17,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 07:05:17,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 07:05:17,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 07:05:17,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 07:05:17,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 07:05:17,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 07:05:17,612 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-23 07:05:17,612 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-23 07:05:17,706 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 07:05:17,706 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 07:05:17,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:05:17 BoogieIcfgContainer [2018-11-23 07:05:17,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 07:05:17,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 07:05:17,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 07:05:17,710 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 07:05:17,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 07:05:17" (1/3) ... [2018-11-23 07:05:17,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5dd7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 07:05:17, skipping insertion in model container [2018-11-23 07:05:17,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:05:17" (2/3) ... [2018-11-23 07:05:17,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5dd7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 07:05:17, skipping insertion in model container [2018-11-23 07:05:17,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:05:17" (3/3) ... [2018-11-23 07:05:17,712 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_10_true-unreach-call_true-termination.c [2018-11-23 07:05:17,718 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 07:05:17,723 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 07:05:17,733 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 07:05:17,758 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 07:05:17,758 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 07:05:17,758 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 07:05:17,759 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 07:05:17,759 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 07:05:17,759 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 07:05:17,759 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 07:05:17,759 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 07:05:17,759 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 07:05:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-23 07:05:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 07:05:17,777 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:17,777 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:17,779 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:17,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:17,784 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-11-23 07:05:17,786 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:17,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:17,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:17,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:05:17,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 07:05:17,906 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 07:05:17,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 07:05:17,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 07:05:17,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 07:05:17,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 07:05:17,918 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-23 07:05:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:17,985 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-23 07:05:17,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 07:05:17,987 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-23 07:05:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:17,994 INFO L225 Difference]: With dead ends: 35 [2018-11-23 07:05:17,994 INFO L226 Difference]: Without dead ends: 21 [2018-11-23 07:05:17,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 07:05:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-23 07:05:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-23 07:05:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-23 07:05:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-23 07:05:18,022 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-23 07:05:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:18,022 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-23 07:05:18,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 07:05:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-23 07:05:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 07:05:18,024 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:18,024 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:18,024 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:18,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:18,024 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-11-23 07:05:18,025 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:18,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:18,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:18,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:05:18,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 07:05:18,055 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 07:05:18,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 07:05:18,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 07:05:18,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 07:05:18,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 07:05:18,058 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-23 07:05:18,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:18,138 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-23 07:05:18,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 07:05:18,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-23 07:05:18,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:18,140 INFO L225 Difference]: With dead ends: 27 [2018-11-23 07:05:18,140 INFO L226 Difference]: Without dead ends: 23 [2018-11-23 07:05:18,141 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 07:05:18,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-23 07:05:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-23 07:05:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-23 07:05:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-23 07:05:18,145 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-23 07:05:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:18,145 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-23 07:05:18,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 07:05:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-23 07:05:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-23 07:05:18,146 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:18,147 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:18,147 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:18,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:18,147 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-11-23 07:05:18,147 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:18,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:18,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:18,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:05:18,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 07:05:18,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:18,218 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:18,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:05:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:18,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 07:05:18,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:18,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-23 07:05:18,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 07:05:18,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 07:05:18,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-23 07:05:18,299 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-23 07:05:18,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:18,385 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-23 07:05:18,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 07:05:18,386 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-23 07:05:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:18,387 INFO L225 Difference]: With dead ends: 38 [2018-11-23 07:05:18,387 INFO L226 Difference]: Without dead ends: 23 [2018-11-23 07:05:18,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-23 07:05:18,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-23 07:05:18,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-23 07:05:18,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-23 07:05:18,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-23 07:05:18,393 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-23 07:05:18,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:18,394 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-23 07:05:18,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 07:05:18,394 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-23 07:05:18,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-23 07:05:18,395 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:18,395 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:18,395 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:18,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:18,396 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-11-23 07:05:18,396 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:18,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:18,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:18,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:05:18,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 07:05:18,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:18,461 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:18,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:05:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:18,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 07:05:18,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:18,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-23 07:05:18,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 07:05:18,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 07:05:18,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 07:05:18,516 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-23 07:05:18,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:18,556 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-23 07:05:18,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 07:05:18,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-23 07:05:18,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:18,558 INFO L225 Difference]: With dead ends: 32 [2018-11-23 07:05:18,558 INFO L226 Difference]: Without dead ends: 28 [2018-11-23 07:05:18,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-23 07:05:18,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-23 07:05:18,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-23 07:05:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-23 07:05:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-23 07:05:18,564 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-23 07:05:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:18,565 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-23 07:05:18,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 07:05:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-23 07:05:18,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-23 07:05:18,566 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:18,566 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:18,566 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:18,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:18,567 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-11-23 07:05:18,567 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:18,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:18,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:18,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:05:18,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-23 07:05:18,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:18,628 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:18,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 07:05:18,654 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 07:05:18,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 07:05:18,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-23 07:05:18,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:18,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-11-23 07:05:18,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 07:05:18,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 07:05:18,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-23 07:05:18,721 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-11-23 07:05:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:18,791 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-11-23 07:05:18,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 07:05:18,792 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-23 07:05:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:18,793 INFO L225 Difference]: With dead ends: 40 [2018-11-23 07:05:18,793 INFO L226 Difference]: Without dead ends: 36 [2018-11-23 07:05:18,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-23 07:05:18,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-23 07:05:18,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-23 07:05:18,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-23 07:05:18,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-23 07:05:18,798 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-23 07:05:18,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:18,798 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-23 07:05:18,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 07:05:18,798 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-23 07:05:18,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-23 07:05:18,800 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:18,800 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:18,800 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:18,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:18,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-11-23 07:05:18,801 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:18,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:18,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:18,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 07:05:18,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-23 07:05:18,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:18,948 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:18,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 07:05:18,979 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-23 07:05:18,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 07:05:18,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-23 07:05:19,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:19,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-23 07:05:19,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 07:05:19,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 07:05:19,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-23 07:05:19,024 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-11-23 07:05:19,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:19,210 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-11-23 07:05:19,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 07:05:19,211 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-11-23 07:05:19,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:19,212 INFO L225 Difference]: With dead ends: 76 [2018-11-23 07:05:19,212 INFO L226 Difference]: Without dead ends: 49 [2018-11-23 07:05:19,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-23 07:05:19,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-23 07:05:19,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-11-23 07:05:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-23 07:05:19,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-11-23 07:05:19,220 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-11-23 07:05:19,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:19,220 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-11-23 07:05:19,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 07:05:19,220 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-11-23 07:05:19,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-23 07:05:19,221 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:19,221 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:19,222 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:19,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:19,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2018-11-23 07:05:19,222 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:19,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:19,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:19,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 07:05:19,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2018-11-23 07:05:19,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:19,304 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:19,324 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 07:05:19,347 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 07:05:19,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 07:05:19,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-11-23 07:05:19,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:19,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2018-11-23 07:05:19,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 07:05:19,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 07:05:19,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-23 07:05:19,382 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 8 states. [2018-11-23 07:05:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:19,461 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2018-11-23 07:05:19,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 07:05:19,461 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2018-11-23 07:05:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:19,463 INFO L225 Difference]: With dead ends: 52 [2018-11-23 07:05:19,463 INFO L226 Difference]: Without dead ends: 48 [2018-11-23 07:05:19,463 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-23 07:05:19,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-23 07:05:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-23 07:05:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-23 07:05:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2018-11-23 07:05:19,470 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 82 [2018-11-23 07:05:19,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:19,471 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2018-11-23 07:05:19,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 07:05:19,471 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2018-11-23 07:05:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-23 07:05:19,473 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:19,473 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:19,474 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:19,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:19,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1659236261, now seen corresponding path program 5 times [2018-11-23 07:05:19,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:19,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:19,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:19,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 07:05:19,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 129 proven. 106 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2018-11-23 07:05:19,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:19,549 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:19,556 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 07:05:19,576 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-23 07:05:19,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 07:05:19,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 463 proven. 77 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-23 07:05:19,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:19,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 11 [2018-11-23 07:05:19,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 07:05:19,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 07:05:19,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-11-23 07:05:19,639 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand 11 states. [2018-11-23 07:05:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:19,796 INFO L93 Difference]: Finished difference Result 94 states and 162 transitions. [2018-11-23 07:05:19,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 07:05:19,797 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 125 [2018-11-23 07:05:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:19,798 INFO L225 Difference]: With dead ends: 94 [2018-11-23 07:05:19,798 INFO L226 Difference]: Without dead ends: 52 [2018-11-23 07:05:19,799 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2018-11-23 07:05:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-23 07:05:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-11-23 07:05:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-23 07:05:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2018-11-23 07:05:19,805 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 125 [2018-11-23 07:05:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:19,805 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2018-11-23 07:05:19,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 07:05:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2018-11-23 07:05:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-23 07:05:19,807 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:19,807 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:19,807 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:19,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:19,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 6 times [2018-11-23 07:05:19,807 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:19,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:19,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:19,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 07:05:19,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 76 proven. 241 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-11-23 07:05:19,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:19,893 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:19,900 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 07:05:19,932 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-11-23 07:05:19,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 07:05:19,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 52 proven. 326 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2018-11-23 07:05:19,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:19,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2018-11-23 07:05:19,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 07:05:19,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 07:05:19,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-23 07:05:19,989 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 9 states. [2018-11-23 07:05:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:20,054 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2018-11-23 07:05:20,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 07:05:20,054 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 136 [2018-11-23 07:05:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:20,055 INFO L225 Difference]: With dead ends: 61 [2018-11-23 07:05:20,055 INFO L226 Difference]: Without dead ends: 57 [2018-11-23 07:05:20,056 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-23 07:05:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-23 07:05:20,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-23 07:05:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-23 07:05:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2018-11-23 07:05:20,060 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 136 [2018-11-23 07:05:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:20,060 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2018-11-23 07:05:20,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 07:05:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2018-11-23 07:05:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-11-23 07:05:20,064 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:20,064 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:20,064 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:20,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash -509498553, now seen corresponding path program 7 times [2018-11-23 07:05:20,065 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:20,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:20,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:20,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 07:05:20,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 669 proven. 122 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2018-11-23 07:05:20,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:20,208 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:20,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:05:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:20,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 653 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-11-23 07:05:20,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:20,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2018-11-23 07:05:20,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 07:05:20,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 07:05:20,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-11-23 07:05:20,374 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 18 states. [2018-11-23 07:05:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:20,810 INFO L93 Difference]: Finished difference Result 142 states and 238 transitions. [2018-11-23 07:05:20,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-23 07:05:20,811 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 204 [2018-11-23 07:05:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:20,813 INFO L225 Difference]: With dead ends: 142 [2018-11-23 07:05:20,813 INFO L226 Difference]: Without dead ends: 93 [2018-11-23 07:05:20,814 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2018-11-23 07:05:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-23 07:05:20,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2018-11-23 07:05:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-11-23 07:05:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 110 transitions. [2018-11-23 07:05:20,824 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 110 transitions. Word has length 204 [2018-11-23 07:05:20,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:20,825 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 110 transitions. [2018-11-23 07:05:20,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 07:05:20,825 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 110 transitions. [2018-11-23 07:05:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-11-23 07:05:20,828 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:20,828 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:20,828 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:20,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:20,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 8 times [2018-11-23 07:05:20,828 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:20,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:20,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:20,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:05:20,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 702 proven. 270 refuted. 0 times theorem prover too weak. 3596 trivial. 0 not checked. [2018-11-23 07:05:20,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:20,953 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:20,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 07:05:21,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 07:05:21,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 07:05:21,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2018-11-23 07:05:21,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:21,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2018-11-23 07:05:21,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 07:05:21,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 07:05:21,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-23 07:05:21,098 INFO L87 Difference]: Start difference. First operand 83 states and 110 transitions. Second operand 11 states. [2018-11-23 07:05:21,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:21,188 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2018-11-23 07:05:21,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 07:05:21,188 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 286 [2018-11-23 07:05:21,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:21,190 INFO L225 Difference]: With dead ends: 92 [2018-11-23 07:05:21,190 INFO L226 Difference]: Without dead ends: 88 [2018-11-23 07:05:21,191 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-23 07:05:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-11-23 07:05:21,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-11-23 07:05:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-23 07:05:21,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 123 transitions. [2018-11-23 07:05:21,200 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 123 transitions. Word has length 286 [2018-11-23 07:05:21,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:21,201 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 123 transitions. [2018-11-23 07:05:21,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 07:05:21,201 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 123 transitions. [2018-11-23 07:05:21,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-11-23 07:05:21,204 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:21,204 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:21,205 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:21,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:21,205 INFO L82 PathProgramCache]: Analyzing trace with hash -229001048, now seen corresponding path program 9 times [2018-11-23 07:05:21,205 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:21,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:21,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:21,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 07:05:21,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 1412 proven. 592 refuted. 0 times theorem prover too weak. 10383 trivial. 0 not checked. [2018-11-23 07:05:21,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:21,384 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:21,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 07:05:21,458 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-11-23 07:05:21,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 07:05:21,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 1415 proven. 256 refuted. 0 times theorem prover too weak. 10716 trivial. 0 not checked. [2018-11-23 07:05:21,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:21,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-11-23 07:05:21,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 07:05:21,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 07:05:21,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-23 07:05:21,590 INFO L87 Difference]: Start difference. First operand 88 states and 123 transitions. Second operand 11 states. [2018-11-23 07:05:21,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:21,684 INFO L93 Difference]: Finished difference Result 95 states and 134 transitions. [2018-11-23 07:05:21,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 07:05:21,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 463 [2018-11-23 07:05:21,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:21,685 INFO L225 Difference]: With dead ends: 95 [2018-11-23 07:05:21,685 INFO L226 Difference]: Without dead ends: 91 [2018-11-23 07:05:21,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-23 07:05:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-11-23 07:05:21,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2018-11-23 07:05:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-23 07:05:21,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 123 transitions. [2018-11-23 07:05:21,694 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 123 transitions. Word has length 463 [2018-11-23 07:05:21,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:21,695 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 123 transitions. [2018-11-23 07:05:21,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 07:05:21,695 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 123 transitions. [2018-11-23 07:05:21,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2018-11-23 07:05:21,697 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:21,697 INFO L402 BasicCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:21,698 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:21,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:21,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1932846124, now seen corresponding path program 10 times [2018-11-23 07:05:21,698 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:21,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:21,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:21,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 07:05:21,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 440 proven. 2503 refuted. 0 times theorem prover too weak. 16160 trivial. 0 not checked. [2018-11-23 07:05:21,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:21,985 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:21,992 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 07:05:22,070 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 07:05:22,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 07:05:22,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 401 proven. 2942 refuted. 0 times theorem prover too weak. 15760 trivial. 0 not checked. [2018-11-23 07:05:22,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:22,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2018-11-23 07:05:22,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 07:05:22,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 07:05:22,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-23 07:05:22,324 INFO L87 Difference]: Start difference. First operand 88 states and 123 transitions. Second operand 12 states. [2018-11-23 07:05:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:22,469 INFO L93 Difference]: Finished difference Result 100 states and 151 transitions. [2018-11-23 07:05:22,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 07:05:22,469 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 572 [2018-11-23 07:05:22,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:22,470 INFO L225 Difference]: With dead ends: 100 [2018-11-23 07:05:22,471 INFO L226 Difference]: Without dead ends: 96 [2018-11-23 07:05:22,471 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-23 07:05:22,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-11-23 07:05:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2018-11-23 07:05:22,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 07:05:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 138 transitions. [2018-11-23 07:05:22,479 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 138 transitions. Word has length 572 [2018-11-23 07:05:22,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:22,479 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 138 transitions. [2018-11-23 07:05:22,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 07:05:22,480 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 138 transitions. [2018-11-23 07:05:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 982 [2018-11-23 07:05:22,486 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:22,487 INFO L402 BasicCegarLoop]: trace histogram [143, 143, 116, 71, 71, 71, 71, 71, 71, 71, 45, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:22,487 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:22,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:22,487 INFO L82 PathProgramCache]: Analyzing trace with hash 937356392, now seen corresponding path program 11 times [2018-11-23 07:05:22,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:22,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:22,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:22,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 07:05:22,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 57222 backedges. 2163 proven. 4820 refuted. 0 times theorem prover too weak. 50239 trivial. 0 not checked. [2018-11-23 07:05:23,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:23,030 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:23,040 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 07:05:23,142 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-11-23 07:05:23,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 07:05:23,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 57222 backedges. 26881 proven. 358 refuted. 0 times theorem prover too weak. 29983 trivial. 0 not checked. [2018-11-23 07:05:23,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:23,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2018-11-23 07:05:23,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 07:05:23,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 07:05:23,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2018-11-23 07:05:23,430 INFO L87 Difference]: Start difference. First operand 93 states and 138 transitions. Second operand 16 states. [2018-11-23 07:05:23,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:23,856 INFO L93 Difference]: Finished difference Result 190 states and 333 transitions. [2018-11-23 07:05:23,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 07:05:23,858 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 981 [2018-11-23 07:05:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:23,860 INFO L225 Difference]: With dead ends: 190 [2018-11-23 07:05:23,860 INFO L226 Difference]: Without dead ends: 107 [2018-11-23 07:05:23,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1011 GetRequests, 985 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2018-11-23 07:05:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-11-23 07:05:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 94. [2018-11-23 07:05:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-23 07:05:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 141 transitions. [2018-11-23 07:05:23,870 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 141 transitions. Word has length 981 [2018-11-23 07:05:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:23,870 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 141 transitions. [2018-11-23 07:05:23,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 07:05:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 141 transitions. [2018-11-23 07:05:23,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2018-11-23 07:05:23,879 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:23,880 INFO L402 BasicCegarLoop]: trace histogram [125, 125, 101, 62, 62, 62, 62, 62, 62, 62, 39, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:23,880 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:23,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:23,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1913587321, now seen corresponding path program 12 times [2018-11-23 07:05:23,880 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:23,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:23,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:23,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 07:05:23,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 3313 proven. 1252 refuted. 0 times theorem prover too weak. 39049 trivial. 0 not checked. [2018-11-23 07:05:24,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:24,251 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:24,257 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 07:05:24,314 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-11-23 07:05:24,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 07:05:24,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 1377 proven. 3746 refuted. 0 times theorem prover too weak. 38491 trivial. 0 not checked. [2018-11-23 07:05:24,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:24,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2018-11-23 07:05:24,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-23 07:05:24,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 07:05:24,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-23 07:05:24,603 INFO L87 Difference]: Start difference. First operand 94 states and 141 transitions. Second operand 14 states. [2018-11-23 07:05:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:24,762 INFO L93 Difference]: Finished difference Result 103 states and 164 transitions. [2018-11-23 07:05:24,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 07:05:24,763 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 858 [2018-11-23 07:05:24,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:24,765 INFO L225 Difference]: With dead ends: 103 [2018-11-23 07:05:24,765 INFO L226 Difference]: Without dead ends: 99 [2018-11-23 07:05:24,765 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 862 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-23 07:05:24,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-11-23 07:05:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-11-23 07:05:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-11-23 07:05:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 158 transitions. [2018-11-23 07:05:24,770 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 158 transitions. Word has length 858 [2018-11-23 07:05:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:24,771 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 158 transitions. [2018-11-23 07:05:24,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-23 07:05:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 158 transitions. [2018-11-23 07:05:24,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1989 [2018-11-23 07:05:24,787 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:24,787 INFO L402 BasicCegarLoop]: trace histogram [291, 291, 235, 145, 145, 145, 145, 145, 145, 145, 90, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:24,788 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:24,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:24,788 INFO L82 PathProgramCache]: Analyzing trace with hash 160711788, now seen corresponding path program 13 times [2018-11-23 07:05:24,788 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:24,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:24,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:24,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 07:05:24,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 238035 backedges. 8559 proven. 6189 refuted. 0 times theorem prover too weak. 223287 trivial. 0 not checked. [2018-11-23 07:05:25,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:25,988 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:25,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:05:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:26,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 238035 backedges. 2560 proven. 12180 refuted. 0 times theorem prover too weak. 223295 trivial. 0 not checked. [2018-11-23 07:05:27,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:27,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 18 [2018-11-23 07:05:27,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 07:05:27,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 07:05:27,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2018-11-23 07:05:27,316 INFO L87 Difference]: Start difference. First operand 99 states and 158 transitions. Second operand 18 states. [2018-11-23 07:05:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:27,481 INFO L93 Difference]: Finished difference Result 168 states and 546 transitions. [2018-11-23 07:05:27,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-23 07:05:27,481 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1988 [2018-11-23 07:05:27,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:27,483 INFO L225 Difference]: With dead ends: 168 [2018-11-23 07:05:27,483 INFO L226 Difference]: Without dead ends: 99 [2018-11-23 07:05:27,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2019 GetRequests, 1993 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2018-11-23 07:05:27,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-11-23 07:05:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-11-23 07:05:27,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-11-23 07:05:27,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 119 transitions. [2018-11-23 07:05:27,490 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 119 transitions. Word has length 1988 [2018-11-23 07:05:27,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:27,491 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 119 transitions. [2018-11-23 07:05:27,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 07:05:27,491 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 119 transitions. [2018-11-23 07:05:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2018-11-23 07:05:27,497 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 07:05:27,498 INFO L402 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:05:27,498 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 07:05:27,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:05:27,498 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 14 times [2018-11-23 07:05:27,498 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:05:27,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:05:27,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:27,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:05:27,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:05:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:05:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-11-23 07:05:28,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 07:05:28,972 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 07:05:28,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 07:05:29,188 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 07:05:29,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 07:05:29,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:05:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-11-23 07:05:30,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 07:05:30,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 40 [2018-11-23 07:05:30,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-23 07:05:30,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-23 07:05:30,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-11-23 07:05:30,562 INFO L87 Difference]: Start difference. First operand 99 states and 119 transitions. Second operand 40 states. [2018-11-23 07:05:30,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:05:30,855 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2018-11-23 07:05:30,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-23 07:05:30,856 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1212 [2018-11-23 07:05:30,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 07:05:30,857 INFO L225 Difference]: With dead ends: 99 [2018-11-23 07:05:30,857 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 07:05:30,858 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1440 SyntacticMatches, 90 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-11-23 07:05:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 07:05:30,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 07:05:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 07:05:30,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 07:05:30,858 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1212 [2018-11-23 07:05:30,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 07:05:30,858 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 07:05:30,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-23 07:05:30,859 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 07:05:30,859 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 07:05:30,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 07:05:31,761 WARN L180 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 76 [2018-11-23 07:05:31,810 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 07:05:31,810 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 07:05:31,810 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 07:05:31,810 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 07:05:31,810 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 07:05:31,810 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 07:05:31,810 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-11-23 07:05:31,810 INFO L448 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-11-23 07:05:31,810 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-11-23 07:05:31,810 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 10) (<= 10 main_~x~0)) [2018-11-23 07:05:31,810 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-11-23 07:05:31,810 INFO L448 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-11-23 07:05:31,810 INFO L448 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-11-23 07:05:31,810 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-11-23 07:05:31,810 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-11-23 07:05:31,810 INFO L448 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-11-23 07:05:31,810 INFO L448 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-11-23 07:05:31,810 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2018-11-23 07:05:31,811 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-23 07:05:31,811 INFO L444 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse0 (<= |fibo_#in~n| 9)) (.cse1 (<= |fibo_#in~n| 8)) (.cse13 (<= |fibo_#in~n| 6)) (.cse9 (<= |fibo_#in~n| fibo_~n)) (.cse8 (<= fibo_~n |fibo_#in~n|))) (let ((.cse3 (<= |fibo_#t~ret0| 1)) (.cse4 (<= 1 |fibo_#t~ret0|)) (.cse5 (and .cse8 (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) (<= |fibo_#in~n| 5) (<= 5 fibo_~n))) (.cse6 (and (<= 4 |fibo_#in~n|) (<= fibo_~n 4) .cse9 (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2))) (.cse7 (and (<= |fibo_#t~ret0| 5) .cse13 .cse8 .cse9 (<= 5 |fibo_#t~ret0|) (<= 6 |fibo_#in~n|))) (.cse12 (and .cse1 (<= 8 |fibo_#in~n|) .cse8 .cse9)) (.cse10 (and (<= 7 |fibo_#in~n|) .cse8 .cse9 (<= |fibo_#in~n| 7))) (.cse11 (and (<= 9 |fibo_#in~n|) .cse8 .cse9 .cse0)) (.cse2 (and .cse8 (<= 10 |fibo_#in~n|) .cse9))) (and (or (<= 11 |fibo_#in~n|) .cse0 (and (<= 34 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 34))) (or (and (<= |fibo_#t~ret0| 21) (<= 21 |fibo_#t~ret0|)) .cse1 .cse2) (or (and .cse3 .cse4) (< 2 |fibo_#in~n|)) (or .cse5 .cse6 .cse7 .cse2 (and .cse8 .cse9 (<= fibo_~n 2) (< 1 fibo_~n)) (and (<= 3 |fibo_#in~n|) .cse8 .cse9 .cse3 .cse4) .cse10 .cse11 .cse12) (or .cse5 .cse6 .cse7 (<= |fibo_#in~n| 3) .cse2 (and (<= |fibo_#t~ret0| 8) (<= 8 |fibo_#t~ret0|)) .cse11 .cse12) (or .cse13 .cse10 .cse11 (and (<= 13 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 13)) .cse2)))) [2018-11-23 07:05:31,811 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-11-23 07:05:31,811 INFO L448 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-11-23 07:05:31,811 INFO L448 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-11-23 07:05:31,811 INFO L451 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-11-23 07:05:31,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 07:05:31 BoogieIcfgContainer [2018-11-23 07:05:31,813 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 07:05:31,813 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 07:05:31,814 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 07:05:31,814 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 07:05:31,814 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:05:17" (3/4) ... [2018-11-23 07:05:31,817 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 07:05:31,821 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 07:05:31,821 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 07:05:31,821 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-11-23 07:05:31,824 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 07:05:31,824 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 07:05:31,824 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 07:05:31,851 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_75cbf455-d23f-4331-a41c-229dc0af7266/bin-2019/uautomizer/witness.graphml [2018-11-23 07:05:31,852 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 07:05:31,852 INFO L168 Benchmark]: Toolchain (without parser) took 14494.00 ms. Allocated memory was 1.0 GB in the beginning and 3.3 GB in the end (delta: 2.3 GB). Free memory was 958.2 MB in the beginning and 2.5 GB in the end (delta: -1.5 GB). Peak memory consumption was 759.8 MB. Max. memory is 11.5 GB. [2018-11-23 07:05:31,853 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 07:05:31,853 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.37 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 07:05:31,853 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.37 ms. Allocated memory is still 1.0 GB. Free memory is still 947.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 07:05:31,854 INFO L168 Benchmark]: Boogie Preprocessor took 9.69 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 07:05:31,854 INFO L168 Benchmark]: RCFGBuilder took 169.61 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -176.9 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-23 07:05:31,854 INFO L168 Benchmark]: TraceAbstraction took 14106.17 ms. Allocated memory was 1.2 GB in the beginning and 3.3 GB in the end (delta: 2.2 GB). Free memory was 1.1 GB in the beginning and 2.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 787.4 MB. Max. memory is 11.5 GB. [2018-11-23 07:05:31,855 INFO L168 Benchmark]: Witness Printer took 38.20 ms. Allocated memory is still 3.3 GB. Free memory is still 2.5 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 07:05:31,856 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 155.37 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.37 ms. Allocated memory is still 1.0 GB. Free memory is still 947.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.69 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 169.61 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -176.9 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14106.17 ms. Allocated memory was 1.2 GB in the beginning and 3.3 GB in the end (delta: 2.2 GB). Free memory was 1.1 GB in the beginning and 2.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 787.4 MB. Max. memory is 11.5 GB. * Witness Printer took 38.20 ms. Allocated memory is still 3.3 GB. Free memory is still 2.5 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 14.0s OverallTime, 17 OverallIterations, 291 TraceHistogramMax, 2.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.9s HoareAnnotationTime, HoareTripleCheckerStatistics: 376 SDtfs, 545 SDslu, 2251 SDs, 0 SdLazy, 2629 SolverSat, 657 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7742 GetRequests, 7360 SyntacticMatches, 92 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 40 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 188 PreInvPairs, 562 NumberOfFragments, 345 HoareAnnotationTreeSize, 188 FomulaSimplifications, 5510 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3281 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 14219 NumberOfCodeBlocks, 12337 NumberOfCodeBlocksAsserted, 126 NumberOfCheckSat, 14187 ConstructedInterpolants, 0 QuantifiedInterpolants, 27142869 SizeOfPredicates, 90 NumberOfNonLiveVariables, 11521 ConjunctsInSsa, 890 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 838977/934886 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...