./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1b7166d94206693c3f254a3c1de8d5825f8510fb ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:51:48,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:51:48,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:51:48,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:51:48,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:51:48,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:51:48,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:51:48,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:51:48,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:51:48,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:51:48,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:51:48,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:51:48,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:51:48,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:51:48,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:51:48,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:51:48,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:51:48,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:51:48,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:51:48,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:51:48,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:51:48,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:51:48,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:51:48,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:51:48,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:51:48,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:51:48,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:51:48,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:51:48,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:51:48,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:51:48,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:51:48,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:51:48,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:51:48,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:51:48,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:51:48,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:51:48,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:51:48,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:51:48,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:51:48,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:51:48,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:51:48,638 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-11-25 08:51:48,662 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:51:48,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:51:48,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:51:48,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:51:48,664 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:51:48,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:51:48,664 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:51:48,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:51:48,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:51:48,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:51:48,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:51:48,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:51:48,666 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-25 08:51:48,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:51:48,666 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:51:48,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:51:48,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:51:48,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:51:48,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:51:48,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:51:48,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:51:48,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:51:48,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:51:48,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:51:48,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:51:48,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:51:48,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:51:48,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b7166d94206693c3f254a3c1de8d5825f8510fb [2019-11-25 08:51:48,813 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:51:48,823 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:51:48,826 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:51:48,827 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:51:48,828 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:51:48,828 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2019-11-25 08:51:48,888 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/data/2e89166e0/555cf09b7cb3442a9234c17dc526e608/FLAGc6892c1b3 [2019-11-25 08:51:49,289 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:51:49,289 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2019-11-25 08:51:49,295 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/data/2e89166e0/555cf09b7cb3442a9234c17dc526e608/FLAGc6892c1b3 [2019-11-25 08:51:49,310 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/data/2e89166e0/555cf09b7cb3442a9234c17dc526e608 [2019-11-25 08:51:49,313 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:51:49,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:51:49,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:51:49,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:51:49,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:51:49,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:51:49" (1/1) ... [2019-11-25 08:51:49,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@344078a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:51:49, skipping insertion in model container [2019-11-25 08:51:49,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:51:49" (1/1) ... [2019-11-25 08:51:49,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:51:49,345 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:51:49,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:51:49,537 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:51:49,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:51:49,664 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:51:49,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:51:49 WrapperNode [2019-11-25 08:51:49,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:51:49,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:51:49,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:51:49,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:51:49,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:51:49" (1/1) ... [2019-11-25 08:51:49,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:51:49" (1/1) ... [2019-11-25 08:51:49,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:51:49,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:51:49,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:51:49,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:51:49,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:51:49" (1/1) ... [2019-11-25 08:51:49,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:51:49" (1/1) ... [2019-11-25 08:51:49,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:51:49" (1/1) ... [2019-11-25 08:51:49,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:51:49" (1/1) ... [2019-11-25 08:51:49,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:51:49" (1/1) ... [2019-11-25 08:51:49,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:51:49" (1/1) ... [2019-11-25 08:51:49,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:51:49" (1/1) ... [2019-11-25 08:51:49,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:51:49,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:51:49,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:51:49,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:51:49,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:51:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:51:49,774 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-11-25 08:51:49,774 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-11-25 08:51:49,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:51:49,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:51:49,938 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:51:49,939 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:51:49,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:51:49 BoogieIcfgContainer [2019-11-25 08:51:49,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:51:49,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:51:49,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:51:49,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:51:49,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:51:49" (1/3) ... [2019-11-25 08:51:49,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d6e8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:51:49, skipping insertion in model container [2019-11-25 08:51:49,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:51:49" (2/3) ... [2019-11-25 08:51:49,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d6e8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:51:49, skipping insertion in model container [2019-11-25 08:51:49,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:51:49" (3/3) ... [2019-11-25 08:51:49,947 INFO L109 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2b.c [2019-11-25 08:51:49,955 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:51:49,961 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-25 08:51:49,970 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-25 08:51:49,991 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:51:49,991 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:51:49,992 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:51:49,992 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:51:49,994 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:51:49,994 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:51:49,994 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:51:49,995 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:51:50,023 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-25 08:51:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-25 08:51:50,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:51:50,028 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-25 08:51:50,029 INFO L410 AbstractCegarLoop]: === Iteration 1 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:51:50,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:51:50,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1454635077, now seen corresponding path program 1 times [2019-11-25 08:51:50,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:51:50,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487676261] [2019-11-25 08:51:50,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:51:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:51:50,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487676261] [2019-11-25 08:51:50,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:51:50,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-25 08:51:50,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715894121] [2019-11-25 08:51:50,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:51:50,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:51:50,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:51:50,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:51:50,228 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-11-25 08:51:50,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:51:50,359 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2019-11-25 08:51:50,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:51:50,361 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-25 08:51:50,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:51:50,368 INFO L225 Difference]: With dead ends: 41 [2019-11-25 08:51:50,369 INFO L226 Difference]: Without dead ends: 36 [2019-11-25 08:51:50,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:51:50,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-25 08:51:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-11-25 08:51:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-25 08:51:50,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-11-25 08:51:50,408 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 6 [2019-11-25 08:51:50,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:51:50,408 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-11-25 08:51:50,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:51:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-11-25 08:51:50,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-25 08:51:50,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:51:50,409 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:51:50,410 INFO L410 AbstractCegarLoop]: === Iteration 2 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:51:50,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:51:50,410 INFO L82 PathProgramCache]: Analyzing trace with hash 2144014465, now seen corresponding path program 1 times [2019-11-25 08:51:50,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:51:50,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128651243] [2019-11-25 08:51:50,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:51:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:51:50,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128651243] [2019-11-25 08:51:50,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:51:50,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-25 08:51:50,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784970044] [2019-11-25 08:51:50,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:51:50,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:51:50,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:51:50,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:51:50,450 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2019-11-25 08:51:50,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:51:50,526 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2019-11-25 08:51:50,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:51:50,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-25 08:51:50,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:51:50,528 INFO L225 Difference]: With dead ends: 50 [2019-11-25 08:51:50,528 INFO L226 Difference]: Without dead ends: 46 [2019-11-25 08:51:50,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:51:50,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-25 08:51:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-11-25 08:51:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-25 08:51:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-25 08:51:50,540 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 7 [2019-11-25 08:51:50,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:51:50,540 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-25 08:51:50,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:51:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-25 08:51:50,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-25 08:51:50,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:51:50,541 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:51:50,542 INFO L410 AbstractCegarLoop]: === Iteration 3 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:51:50,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:51:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash -736378463, now seen corresponding path program 1 times [2019-11-25 08:51:50,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:51:50,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174977830] [2019-11-25 08:51:50,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:51:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:51:50,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174977830] [2019-11-25 08:51:50,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770706069] [2019-11-25 08:51:50,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-25 08:51:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:51:50,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:51:50,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:51:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:51:50,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:51:50,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-25 08:51:50,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371897237] [2019-11-25 08:51:50,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:51:50,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:51:50,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:51:50,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:51:50,709 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 7 states. [2019-11-25 08:51:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:51:50,825 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2019-11-25 08:51:50,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:51:50,826 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-11-25 08:51:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:51:50,828 INFO L225 Difference]: With dead ends: 63 [2019-11-25 08:51:50,828 INFO L226 Difference]: Without dead ends: 62 [2019-11-25 08:51:50,828 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:51:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-25 08:51:50,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2019-11-25 08:51:50,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-25 08:51:50,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2019-11-25 08:51:50,840 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 12 [2019-11-25 08:51:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:51:50,841 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2019-11-25 08:51:50,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:51:50,841 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2019-11-25 08:51:50,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:51:50,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:51:50,842 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:51:51,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:51:51,043 INFO L410 AbstractCegarLoop]: === Iteration 4 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:51:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:51:51,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1009328462, now seen corresponding path program 1 times [2019-11-25 08:51:51,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:51:51,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254708231] [2019-11-25 08:51:51,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:51:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:51:51,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254708231] [2019-11-25 08:51:51,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:51:51,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-25 08:51:51,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500792286] [2019-11-25 08:51:51,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:51:51,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:51:51,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:51:51,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:51:51,100 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 4 states. [2019-11-25 08:51:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:51:51,138 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2019-11-25 08:51:51,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:51:51,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-25 08:51:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:51:51,143 INFO L225 Difference]: With dead ends: 78 [2019-11-25 08:51:51,144 INFO L226 Difference]: Without dead ends: 77 [2019-11-25 08:51:51,144 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:51:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-25 08:51:51,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2019-11-25 08:51:51,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-25 08:51:51,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2019-11-25 08:51:51,173 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 14 [2019-11-25 08:51:51,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:51:51,174 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2019-11-25 08:51:51,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:51:51,174 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2019-11-25 08:51:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-25 08:51:51,174 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:51:51,174 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:51:51,175 INFO L410 AbstractCegarLoop]: === Iteration 5 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:51:51,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:51:51,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1224411294, now seen corresponding path program 1 times [2019-11-25 08:51:51,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:51:51,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199219509] [2019-11-25 08:51:51,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:51:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:51:51,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199219509] [2019-11-25 08:51:51,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:51:51,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:51:51,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161243698] [2019-11-25 08:51:51,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:51:51,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:51:51,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:51:51,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:51:51,208 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 3 states. [2019-11-25 08:51:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:51:51,227 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2019-11-25 08:51:51,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:51:51,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-25 08:51:51,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:51:51,231 INFO L225 Difference]: With dead ends: 66 [2019-11-25 08:51:51,231 INFO L226 Difference]: Without dead ends: 65 [2019-11-25 08:51:51,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:51:51,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-25 08:51:51,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-25 08:51:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-25 08:51:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2019-11-25 08:51:51,244 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 15 [2019-11-25 08:51:51,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:51:51,245 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2019-11-25 08:51:51,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:51:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2019-11-25 08:51:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:51:51,246 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:51:51,246 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2019-11-25 08:51:51,246 INFO L410 AbstractCegarLoop]: === Iteration 6 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:51:51,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:51:51,247 INFO L82 PathProgramCache]: Analyzing trace with hash -231947135, now seen corresponding path program 2 times [2019-11-25 08:51:51,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:51:51,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092850812] [2019-11-25 08:51:51,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:51:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:51:51,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092850812] [2019-11-25 08:51:51,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870179072] [2019-11-25 08:51:51,316 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:51:51,346 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:51:51,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:51:51,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:51:51,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:51:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:51:51,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:51:51,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-25 08:51:51,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790031191] [2019-11-25 08:51:51,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:51:51,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:51:51,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:51:51,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:51:51,372 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 9 states. [2019-11-25 08:51:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:51:51,537 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2019-11-25 08:51:51,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-25 08:51:51,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-11-25 08:51:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:51:51,543 INFO L225 Difference]: With dead ends: 85 [2019-11-25 08:51:51,543 INFO L226 Difference]: Without dead ends: 84 [2019-11-25 08:51:51,544 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:51:51,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-25 08:51:51,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2019-11-25 08:51:51,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-25 08:51:51,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2019-11-25 08:51:51,558 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 17 [2019-11-25 08:51:51,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:51:51,558 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2019-11-25 08:51:51,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:51:51,558 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2019-11-25 08:51:51,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-25 08:51:51,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:51:51,559 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:51:51,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:51:51,760 INFO L410 AbstractCegarLoop]: === Iteration 7 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:51:51,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:51:51,761 INFO L82 PathProgramCache]: Analyzing trace with hash -855233152, now seen corresponding path program 1 times [2019-11-25 08:51:51,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:51:51,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435431140] [2019-11-25 08:51:51,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:51:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:51:51,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435431140] [2019-11-25 08:51:51,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:51:51,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:51:51,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577168591] [2019-11-25 08:51:51,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:51:51,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:51:51,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:51:51,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:51:51,816 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 6 states. [2019-11-25 08:51:51,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:51:51,981 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2019-11-25 08:51:51,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:51:51,981 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-25 08:51:51,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:51:51,983 INFO L225 Difference]: With dead ends: 117 [2019-11-25 08:51:51,983 INFO L226 Difference]: Without dead ends: 116 [2019-11-25 08:51:51,984 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:51:51,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-25 08:51:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2019-11-25 08:51:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-25 08:51:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2019-11-25 08:51:52,001 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 19 [2019-11-25 08:51:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:51:52,001 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2019-11-25 08:51:52,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:51:52,001 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2019-11-25 08:51:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-25 08:51:52,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:51:52,003 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:51:52,003 INFO L410 AbstractCegarLoop]: === Iteration 8 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:51:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:51:52,003 INFO L82 PathProgramCache]: Analyzing trace with hash -742423898, now seen corresponding path program 1 times [2019-11-25 08:51:52,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:51:52,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906452989] [2019-11-25 08:51:52,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:51:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:51:52,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906452989] [2019-11-25 08:51:52,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:51:52,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:51:52,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546371277] [2019-11-25 08:51:52,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:51:52,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:51:52,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:51:52,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:51:52,070 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 6 states. [2019-11-25 08:51:52,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:51:52,143 INFO L93 Difference]: Finished difference Result 130 states and 174 transitions. [2019-11-25 08:51:52,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:51:52,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-25 08:51:52,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:51:52,145 INFO L225 Difference]: With dead ends: 130 [2019-11-25 08:51:52,145 INFO L226 Difference]: Without dead ends: 66 [2019-11-25 08:51:52,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:51:52,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-25 08:51:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 35. [2019-11-25 08:51:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-25 08:51:52,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-11-25 08:51:52,162 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2019-11-25 08:51:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:51:52,163 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-11-25 08:51:52,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:51:52,163 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-11-25 08:51:52,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-25 08:51:52,164 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:51:52,164 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1] [2019-11-25 08:51:52,164 INFO L410 AbstractCegarLoop]: === Iteration 9 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:51:52,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:51:52,164 INFO L82 PathProgramCache]: Analyzing trace with hash -559247967, now seen corresponding path program 3 times [2019-11-25 08:51:52,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:51:52,165 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456424709] [2019-11-25 08:51:52,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:51:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:51:52,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456424709] [2019-11-25 08:51:52,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271203079] [2019-11-25 08:51:52,303 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:51:52,336 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-25 08:51:52,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:51:52,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:51:52,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:51:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:51:52,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:51:52,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-25 08:51:52,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909569927] [2019-11-25 08:51:52,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-25 08:51:52,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:51:52,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:51:52,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:51:52,349 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2019-11-25 08:51:52,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:51:52,545 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2019-11-25 08:51:52,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-25 08:51:52,545 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-11-25 08:51:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:51:52,547 INFO L225 Difference]: With dead ends: 62 [2019-11-25 08:51:52,547 INFO L226 Difference]: Without dead ends: 61 [2019-11-25 08:51:52,548 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:51:52,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-25 08:51:52,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2019-11-25 08:51:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-25 08:51:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-25 08:51:52,554 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 22 [2019-11-25 08:51:52,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:51:52,554 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-25 08:51:52,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-25 08:51:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-25 08:51:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-25 08:51:52,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:51:52,556 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:51:52,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:51:52,760 INFO L410 AbstractCegarLoop]: === Iteration 10 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:51:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:51:52,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1606295908, now seen corresponding path program 2 times [2019-11-25 08:51:52,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:51:52,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833391402] [2019-11-25 08:51:52,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:51:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:51:52,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833391402] [2019-11-25 08:51:52,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741852302] [2019-11-25 08:51:52,830 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:51:52,864 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:51:52,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:51:52,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:51:52,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:51:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:51:52,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:51:52,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-25 08:51:52,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412730965] [2019-11-25 08:51:52,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:51:52,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:51:52,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:51:52,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:51:52,875 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 8 states. [2019-11-25 08:51:52,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:51:52,982 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2019-11-25 08:51:52,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:51:52,983 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-11-25 08:51:52,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:51:52,983 INFO L225 Difference]: With dead ends: 70 [2019-11-25 08:51:52,983 INFO L226 Difference]: Without dead ends: 54 [2019-11-25 08:51:52,984 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:51:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-25 08:51:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2019-11-25 08:51:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-25 08:51:52,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-11-25 08:51:52,989 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 25 [2019-11-25 08:51:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:51:52,989 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-11-25 08:51:52,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:51:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-11-25 08:51:52,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-25 08:51:52,990 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:51:52,990 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2019-11-25 08:51:53,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:51:53,191 INFO L410 AbstractCegarLoop]: === Iteration 11 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:51:53,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:51:53,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1828550785, now seen corresponding path program 4 times [2019-11-25 08:51:53,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:51:53,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34505276] [2019-11-25 08:51:53,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:51:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:51:53,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34505276] [2019-11-25 08:51:53,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322949989] [2019-11-25 08:51:53,293 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:51:53,327 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:51:53,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:51:53,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:51:53,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:51:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-25 08:51:53,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:51:53,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 13 [2019-11-25 08:51:53,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999345937] [2019-11-25 08:51:53,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-25 08:51:53,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:51:53,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-25 08:51:53,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:51:53,395 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 14 states. [2019-11-25 08:51:53,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:51:53,489 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2019-11-25 08:51:53,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:51:53,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-11-25 08:51:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:51:53,491 INFO L225 Difference]: With dead ends: 61 [2019-11-25 08:51:53,491 INFO L226 Difference]: Without dead ends: 60 [2019-11-25 08:51:53,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:51:53,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-25 08:51:53,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2019-11-25 08:51:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-25 08:51:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-11-25 08:51:53,497 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2019-11-25 08:51:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:51:53,498 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-11-25 08:51:53,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-25 08:51:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-11-25 08:51:53,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-25 08:51:53,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:51:53,499 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:51:53,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:51:53,703 INFO L410 AbstractCegarLoop]: === Iteration 12 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-25 08:51:53,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:51:53,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1103662182, now seen corresponding path program 3 times [2019-11-25 08:51:53,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:51:53,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474813363] [2019-11-25 08:51:53,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:51:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:51:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:51:53,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474813363] [2019-11-25 08:51:53,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43053859] [2019-11-25 08:51:53,817 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:51:53,879 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-25 08:51:53,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:51:53,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:51:53,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:51:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:51:53,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:51:53,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-25 08:51:53,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138297989] [2019-11-25 08:51:53,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:51:53,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:51:53,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:51:53,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:51:53,891 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2019-11-25 08:51:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:51:54,028 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2019-11-25 08:51:54,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-25 08:51:54,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-25 08:51:54,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:51:54,032 INFO L225 Difference]: With dead ends: 42 [2019-11-25 08:51:54,033 INFO L226 Difference]: Without dead ends: 0 [2019-11-25 08:51:54,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:51:54,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-25 08:51:54,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-25 08:51:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-25 08:51:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-25 08:51:54,034 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2019-11-25 08:51:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:51:54,034 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:51:54,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:51:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-25 08:51:54,035 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-25 08:51:54,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:51:54,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-25 08:51:54,781 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 25 [2019-11-25 08:51:54,899 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 22 [2019-11-25 08:51:54,901 INFO L444 ceAbstractionStarter]: For program point gFINAL(lines 10 16) no Hoare annotation was computed. [2019-11-25 08:51:54,901 INFO L444 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-11-25 08:51:54,901 INFO L444 ceAbstractionStarter]: For program point L15-1(line 15) no Hoare annotation was computed. [2019-11-25 08:51:54,902 INFO L440 ceAbstractionStarter]: At program point L15-2(line 15) the Hoare annotation is: (and (or (<= 2 g_~x) (not (<= 2 |g_#in~x|)) (not (<= |g_#in~x| 2))) (or (and (<= 0 g_~x) (<= g_~x 2147483647) (not (= 0 g_~x))) (not (<= 0 |g_#in~x|)) (not (<= |g_#in~x| 2147483647)))) [2019-11-25 08:51:54,902 INFO L444 ceAbstractionStarter]: For program point L12(lines 12 15) no Hoare annotation was computed. [2019-11-25 08:51:54,902 INFO L444 ceAbstractionStarter]: For program point L15-3(line 15) no Hoare annotation was computed. [2019-11-25 08:51:54,902 INFO L444 ceAbstractionStarter]: For program point L15-4(line 15) no Hoare annotation was computed. [2019-11-25 08:51:54,902 INFO L444 ceAbstractionStarter]: For program point L15-5(line 15) no Hoare annotation was computed. [2019-11-25 08:51:54,902 INFO L444 ceAbstractionStarter]: For program point gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-25 08:51:54,902 INFO L440 ceAbstractionStarter]: At program point L15-6(line 15) the Hoare annotation is: (let ((.cse0 (not (<= 0 |g_#in~x|))) (.cse1 (not (<= |g_#in~x| 2147483647)))) (and (or (not (<= 2 |g_#in~x|)) (not (<= |g_#in~x| 2))) (or (<= 1 g_~x) .cse0 .cse1) (or .cse0 (and (<= g_~x 2147483647) (<= |g_#t~ret0| 1) (<= 1 |g_#t~ret0|)) .cse1))) [2019-11-25 08:51:54,903 INFO L444 ceAbstractionStarter]: For program point gEXIT(lines 10 16) no Hoare annotation was computed. [2019-11-25 08:51:54,903 INFO L444 ceAbstractionStarter]: For program point L15-7(line 15) no Hoare annotation was computed. [2019-11-25 08:51:54,903 INFO L447 ceAbstractionStarter]: At program point gENTRY(lines 10 16) the Hoare annotation is: true [2019-11-25 08:51:54,903 INFO L444 ceAbstractionStarter]: For program point gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-25 08:51:54,903 INFO L444 ceAbstractionStarter]: For program point gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-25 08:51:54,903 INFO L444 ceAbstractionStarter]: For program point gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-25 08:51:54,903 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-25 08:51:54,903 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-25 08:51:54,903 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-25 08:51:54,904 INFO L440 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 ULTIMATE.start_main_~x~0)) [2019-11-25 08:51:54,904 INFO L444 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2019-11-25 08:51:54,904 INFO L444 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-11-25 08:51:54,904 INFO L440 ceAbstractionStarter]: At program point L18(lines 18 22) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2019-11-25 08:51:54,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:51:54 BoogieIcfgContainer [2019-11-25 08:51:54,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:51:54,917 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:51:54,917 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:51:54,917 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:51:54,918 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:51:49" (3/4) ... [2019-11-25 08:51:54,921 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-25 08:51:54,926 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure g [2019-11-25 08:51:54,933 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-25 08:51:54,933 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-25 08:51:54,985 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_79be336c-b895-45d7-8520-318f4058dcd1/bin/uautomizer/witness.graphml [2019-11-25 08:51:54,985 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:51:54,986 INFO L168 Benchmark]: Toolchain (without parser) took 5672.00 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 231.7 MB). Free memory was 952.8 MB in the beginning and 1.1 GB in the end (delta: -111.7 MB). Peak memory consumption was 120.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:51:54,987 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:51:54,991 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 952.8 MB in the beginning and 1.2 GB in the end (delta: -219.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:51:54,991 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.80 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:51:54,991 INFO L168 Benchmark]: Boogie Preprocessor took 21.72 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:51:54,992 INFO L168 Benchmark]: RCFGBuilder took 218.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:51:54,992 INFO L168 Benchmark]: TraceAbstraction took 4975.93 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 50.9 MB). Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 80.8 MB). Peak memory consumption was 131.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:51:54,993 INFO L168 Benchmark]: Witness Printer took 67.95 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-25 08:51:54,995 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 350.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 952.8 MB in the beginning and 1.2 GB in the end (delta: -219.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.80 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.72 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 218.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4975.93 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 50.9 MB). Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 80.8 MB). Peak memory consumption was 131.6 MB. Max. memory is 11.5 GB. * Witness Printer took 67.95 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: x <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 4 error locations. Result: SAFE, OverallTime: 4.9s, OverallIterations: 12, TraceHistogramMax: 5, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, HoareTripleCheckerStatistics: 201 SDtfs, 335 SDslu, 659 SDs, 0 SdLazy, 621 SolverSat, 115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 250 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 126 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 62 PreInvPairs, 67 NumberOfFragments, 85 HoareAnnotationTreeSize, 62 FomulaSimplifications, 18966 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 5 FomulaSimplificationsInter, 4821 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 329 ConstructedInterpolants, 0 QuantifiedInterpolants, 21879 SizeOfPredicates, 19 NumberOfNonLiveVariables, 265 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 131/307 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...