./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c -s /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/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 14df269faa4a77275028af94d8141ab36c184cf5 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 23:11:41,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:11:41,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:11:41,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:11:41,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:11:41,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:11:41,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:11:41,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:11:41,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:11:41,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:11:41,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:11:41,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:11:41,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:11:41,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:11:41,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:11:41,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:11:41,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:11:41,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:11:41,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:11:41,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:11:41,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:11:41,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:11:41,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:11:41,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:11:41,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:11:41,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:11:41,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:11:41,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:11:41,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:11:41,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:11:41,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:11:41,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:11:41,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:11:41,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:11:41,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:11:41,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:11:41,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:11:41,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:11:41,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:11:41,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:11:41,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:11:41,511 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-11-15 23:11:41,524 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:11:41,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:11:41,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:11:41,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:11:41,526 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:11:41,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:11:41,527 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-15 23:11:41,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:11:41,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:11:41,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:11:41,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:11:41,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:11:41,528 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-15 23:11:41,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:11:41,529 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:11:41,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:11:41,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:11:41,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:11:41,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:11:41,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:11:41,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:11:41,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:11:41,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:11:41,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:11:41,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:11:41,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 23:11:41,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:11:41,532 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_71ac270d-80fc-480e-a91a-d04b5e7cdd37/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 -> 14df269faa4a77275028af94d8141ab36c184cf5 [2019-11-15 23:11:41,557 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:11:41,566 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:11:41,569 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:11:41,571 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:11:41,571 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:11:41,572 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2019-11-15 23:11:41,621 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/data/870466a6c/92604674b8d644109f1b3f5c63df4985/FLAGca0e8cb28 [2019-11-15 23:11:42,022 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:11:42,023 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2019-11-15 23:11:42,028 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/data/870466a6c/92604674b8d644109f1b3f5c63df4985/FLAGca0e8cb28 [2019-11-15 23:11:42,045 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/data/870466a6c/92604674b8d644109f1b3f5c63df4985 [2019-11-15 23:11:42,048 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:11:42,049 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:11:42,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:11:42,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:11:42,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:11:42,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:11:42" (1/1) ... [2019-11-15 23:11:42,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428f38d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:11:42, skipping insertion in model container [2019-11-15 23:11:42,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:11:42" (1/1) ... [2019-11-15 23:11:42,063 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:11:42,079 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:11:42,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:11:42,254 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:11:42,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:11:42,346 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:11:42,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:11:42 WrapperNode [2019-11-15 23:11:42,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:11:42,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:11:42,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:11:42,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:11:42,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:11:42" (1/1) ... [2019-11-15 23:11:42,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:11:42" (1/1) ... [2019-11-15 23:11:42,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:11:42,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:11:42,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:11:42,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:11:42,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:11:42" (1/1) ... [2019-11-15 23:11:42,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:11:42" (1/1) ... [2019-11-15 23:11:42,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:11:42" (1/1) ... [2019-11-15 23:11:42,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:11:42" (1/1) ... [2019-11-15 23:11:42,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:11:42" (1/1) ... [2019-11-15 23:11:42,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:11:42" (1/1) ... [2019-11-15 23:11:42,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:11:42" (1/1) ... [2019-11-15 23:11:42,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:11:42,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:11:42,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:11:42,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:11:42,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:11:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:11:42,460 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-11-15 23:11:42,461 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-11-15 23:11:42,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:11:42,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:11:42,679 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:11:42,679 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-15 23:11:42,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:11:42 BoogieIcfgContainer [2019-11-15 23:11:42,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:11:42,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:11:42,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:11:42,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:11:42,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:11:42" (1/3) ... [2019-11-15 23:11:42,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30997c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:11:42, skipping insertion in model container [2019-11-15 23:11:42,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:11:42" (2/3) ... [2019-11-15 23:11:42,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30997c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:11:42, skipping insertion in model container [2019-11-15 23:11:42,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:11:42" (3/3) ... [2019-11-15 23:11:42,687 INFO L109 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2c.c [2019-11-15 23:11:42,695 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:11:42,702 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-15 23:11:42,714 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-15 23:11:42,734 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:11:42,735 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:11:42,735 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:11:42,735 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:11:42,735 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:11:42,735 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:11:42,736 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:11:42,736 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:11:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-15 23:11:42,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-15 23:11:42,755 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:42,756 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-15 23:11:42,757 INFO L410 AbstractCegarLoop]: === Iteration 1 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:42,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:42,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1454635077, now seen corresponding path program 1 times [2019-11-15 23:11:42,769 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:42,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039177778] [2019-11-15 23:11:42,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:42,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:42,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:11:42,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039177778] [2019-11-15 23:11:42,941 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:11:42,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 23:11:42,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443564295] [2019-11-15 23:11:42,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:11:42,946 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:42,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:11:42,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:11:42,957 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-11-15 23:11:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:43,077 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2019-11-15 23:11:43,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:11:43,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-15 23:11:43,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:43,088 INFO L225 Difference]: With dead ends: 41 [2019-11-15 23:11:43,088 INFO L226 Difference]: Without dead ends: 36 [2019-11-15 23:11:43,091 INFO L600 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 [2019-11-15 23:11:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-15 23:11:43,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-11-15 23:11:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-15 23:11:43,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-11-15 23:11:43,131 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 6 [2019-11-15 23:11:43,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:43,131 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-11-15 23:11:43,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:11:43,132 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-11-15 23:11:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-15 23:11:43,132 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:43,132 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:43,133 INFO L410 AbstractCegarLoop]: === Iteration 2 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:43,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:43,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2144014465, now seen corresponding path program 1 times [2019-11-15 23:11:43,133 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:43,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313386165] [2019-11-15 23:11:43,134 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:43,134 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:43,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:11:43,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313386165] [2019-11-15 23:11:43,167 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:11:43,167 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 23:11:43,167 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666669014] [2019-11-15 23:11:43,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:11:43,169 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:43,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:11:43,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:11:43,170 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2019-11-15 23:11:43,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:43,236 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2019-11-15 23:11:43,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:11:43,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-15 23:11:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:43,238 INFO L225 Difference]: With dead ends: 50 [2019-11-15 23:11:43,238 INFO L226 Difference]: Without dead ends: 46 [2019-11-15 23:11:43,239 INFO L600 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 [2019-11-15 23:11:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-15 23:11:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-11-15 23:11:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-15 23:11:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-15 23:11:43,250 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 7 [2019-11-15 23:11:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:43,250 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-15 23:11:43,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:11:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-15 23:11:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-15 23:11:43,251 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:43,251 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:43,251 INFO L410 AbstractCegarLoop]: === Iteration 3 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:43,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:43,252 INFO L82 PathProgramCache]: Analyzing trace with hash -736378463, now seen corresponding path program 1 times [2019-11-15 23:11:43,252 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:43,252 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421575561] [2019-11-15 23:11:43,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:43,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:43,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:11:43,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421575561] [2019-11-15 23:11:43,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520528651] [2019-11-15 23:11:43,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:43,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:11:43,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:11:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:11:43,490 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:11:43,491 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-15 23:11:43,491 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50814357] [2019-11-15 23:11:43,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:11:43,494 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:43,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:11:43,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:11:43,496 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 7 states. [2019-11-15 23:11:43,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:43,618 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2019-11-15 23:11:43,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:11:43,619 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-11-15 23:11:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:43,621 INFO L225 Difference]: With dead ends: 63 [2019-11-15 23:11:43,621 INFO L226 Difference]: Without dead ends: 62 [2019-11-15 23:11:43,621 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:11:43,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-15 23:11:43,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2019-11-15 23:11:43,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-15 23:11:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2019-11-15 23:11:43,634 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 12 [2019-11-15 23:11:43,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:43,635 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2019-11-15 23:11:43,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:11:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2019-11-15 23:11:43,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-15 23:11:43,635 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:43,636 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:43,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:43,843 INFO L410 AbstractCegarLoop]: === Iteration 4 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:43,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1009328462, now seen corresponding path program 1 times [2019-11-15 23:11:43,843 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:43,843 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787130958] [2019-11-15 23:11:43,843 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:43,844 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:43,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:11:43,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787130958] [2019-11-15 23:11:43,876 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:11:43,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 23:11:43,876 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97720102] [2019-11-15 23:11:43,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:11:43,883 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:43,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:11:43,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:11:43,883 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 3 states. [2019-11-15 23:11:43,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:43,893 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2019-11-15 23:11:43,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:11:43,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-15 23:11:43,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:43,895 INFO L225 Difference]: With dead ends: 52 [2019-11-15 23:11:43,895 INFO L226 Difference]: Without dead ends: 51 [2019-11-15 23:11:43,895 INFO L600 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 [2019-11-15 23:11:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-15 23:11:43,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-15 23:11:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-15 23:11:43,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2019-11-15 23:11:43,905 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 14 [2019-11-15 23:11:43,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:43,906 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2019-11-15 23:11:43,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:11:43,906 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2019-11-15 23:11:43,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-15 23:11:43,907 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:43,907 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:43,907 INFO L410 AbstractCegarLoop]: === Iteration 5 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:43,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:43,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1224411294, now seen corresponding path program 1 times [2019-11-15 23:11:43,907 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:43,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321749707] [2019-11-15 23:11:43,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:43,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:43,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:11:43,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321749707] [2019-11-15 23:11:43,950 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:11:43,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 23:11:43,950 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659055145] [2019-11-15 23:11:43,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:11:43,950 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:43,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:11:43,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:11:43,951 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 4 states. [2019-11-15 23:11:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:43,982 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2019-11-15 23:11:43,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:11:43,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-15 23:11:43,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:43,985 INFO L225 Difference]: With dead ends: 77 [2019-11-15 23:11:43,985 INFO L226 Difference]: Without dead ends: 76 [2019-11-15 23:11:43,985 INFO L600 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 [2019-11-15 23:11:43,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-15 23:11:43,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2019-11-15 23:11:43,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-15 23:11:43,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2019-11-15 23:11:43,998 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 15 [2019-11-15 23:11:43,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:43,998 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2019-11-15 23:11:43,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:11:43,999 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2019-11-15 23:11:43,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 23:11:43,999 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:43,999 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2019-11-15 23:11:44,000 INFO L410 AbstractCegarLoop]: === Iteration 6 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:44,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:44,000 INFO L82 PathProgramCache]: Analyzing trace with hash -231947135, now seen corresponding path program 2 times [2019-11-15 23:11:44,000 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:44,000 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535651931] [2019-11-15 23:11:44,001 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:44,001 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:44,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:11:44,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535651931] [2019-11-15 23:11:44,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639034141] [2019-11-15 23:11:44,081 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:44,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:11:44,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:11:44,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:11:44,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:11:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:11:44,133 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:11:44,134 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-15 23:11:44,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695419633] [2019-11-15 23:11:44,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 23:11:44,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:44,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 23:11:44,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-15 23:11:44,139 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 9 states. [2019-11-15 23:11:44,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:44,292 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-11-15 23:11:44,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-15 23:11:44,293 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-11-15 23:11:44,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:44,294 INFO L225 Difference]: With dead ends: 90 [2019-11-15 23:11:44,294 INFO L226 Difference]: Without dead ends: 89 [2019-11-15 23:11:44,295 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-11-15 23:11:44,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-15 23:11:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2019-11-15 23:11:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-15 23:11:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2019-11-15 23:11:44,308 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 17 [2019-11-15 23:11:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:44,308 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2019-11-15 23:11:44,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 23:11:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2019-11-15 23:11:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 23:11:44,309 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:44,310 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:44,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:44,520 INFO L410 AbstractCegarLoop]: === Iteration 7 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:44,520 INFO L82 PathProgramCache]: Analyzing trace with hash -855233152, now seen corresponding path program 1 times [2019-11-15 23:11:44,521 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:44,521 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404401639] [2019-11-15 23:11:44,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:44,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:44,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:11:44,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404401639] [2019-11-15 23:11:44,588 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:11:44,588 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 23:11:44,588 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274075779] [2019-11-15 23:11:44,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 23:11:44,589 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:44,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 23:11:44,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:11:44,589 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand 6 states. [2019-11-15 23:11:44,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:44,735 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2019-11-15 23:11:44,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:11:44,736 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-15 23:11:44,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:44,738 INFO L225 Difference]: With dead ends: 117 [2019-11-15 23:11:44,738 INFO L226 Difference]: Without dead ends: 116 [2019-11-15 23:11:44,739 INFO L600 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 [2019-11-15 23:11:44,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-15 23:11:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2019-11-15 23:11:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-15 23:11:44,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2019-11-15 23:11:44,756 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 19 [2019-11-15 23:11:44,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:44,757 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2019-11-15 23:11:44,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 23:11:44,757 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2019-11-15 23:11:44,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-15 23:11:44,758 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:44,758 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:44,759 INFO L410 AbstractCegarLoop]: === Iteration 8 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:44,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:44,759 INFO L82 PathProgramCache]: Analyzing trace with hash -742423898, now seen corresponding path program 1 times [2019-11-15 23:11:44,759 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:44,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016717085] [2019-11-15 23:11:44,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:44,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:44,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:11:44,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016717085] [2019-11-15 23:11:44,810 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:11:44,811 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 23:11:44,811 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925414167] [2019-11-15 23:11:44,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 23:11:44,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:44,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 23:11:44,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:11:44,812 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 6 states. [2019-11-15 23:11:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:44,952 INFO L93 Difference]: Finished difference Result 135 states and 174 transitions. [2019-11-15 23:11:44,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:11:44,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-15 23:11:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:44,954 INFO L225 Difference]: With dead ends: 135 [2019-11-15 23:11:44,954 INFO L226 Difference]: Without dead ends: 134 [2019-11-15 23:11:44,955 INFO L600 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 [2019-11-15 23:11:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-15 23:11:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 125. [2019-11-15 23:11:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-15 23:11:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 160 transitions. [2019-11-15 23:11:44,973 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 160 transitions. Word has length 20 [2019-11-15 23:11:44,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:44,974 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 160 transitions. [2019-11-15 23:11:44,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 23:11:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 160 transitions. [2019-11-15 23:11:44,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 23:11:44,975 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:44,975 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1] [2019-11-15 23:11:44,976 INFO L410 AbstractCegarLoop]: === Iteration 9 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:44,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:44,976 INFO L82 PathProgramCache]: Analyzing trace with hash -559247967, now seen corresponding path program 3 times [2019-11-15 23:11:44,976 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:44,976 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171656687] [2019-11-15 23:11:44,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:44,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:44,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:11:45,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171656687] [2019-11-15 23:11:45,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078896685] [2019-11-15 23:11:45,083 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:45,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-15 23:11:45,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:11:45,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 23:11:45,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:11:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:11:45,143 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:11:45,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-15 23:11:45,144 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075545345] [2019-11-15 23:11:45,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 23:11:45,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:45,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 23:11:45,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:11:45,145 INFO L87 Difference]: Start difference. First operand 125 states and 160 transitions. Second operand 11 states. [2019-11-15 23:11:45,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:45,335 INFO L93 Difference]: Finished difference Result 150 states and 192 transitions. [2019-11-15 23:11:45,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-15 23:11:45,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-11-15 23:11:45,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:45,337 INFO L225 Difference]: With dead ends: 150 [2019-11-15 23:11:45,338 INFO L226 Difference]: Without dead ends: 149 [2019-11-15 23:11:45,339 INFO L600 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 [2019-11-15 23:11:45,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-15 23:11:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2019-11-15 23:11:45,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-15 23:11:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 183 transitions. [2019-11-15 23:11:45,357 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 183 transitions. Word has length 22 [2019-11-15 23:11:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:45,357 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 183 transitions. [2019-11-15 23:11:45,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 23:11:45,358 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 183 transitions. [2019-11-15 23:11:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-15 23:11:45,359 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:45,359 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:45,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:45,579 INFO L410 AbstractCegarLoop]: === Iteration 10 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:45,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:45,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1606295908, now seen corresponding path program 2 times [2019-11-15 23:11:45,579 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:45,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905319281] [2019-11-15 23:11:45,579 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:45,579 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:45,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:11:45,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905319281] [2019-11-15 23:11:45,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085839759] [2019-11-15 23:11:45,667 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:45,704 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:11:45,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:11:45,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 23:11:45,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:11:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:11:45,712 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:11:45,712 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-15 23:11:45,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997167740] [2019-11-15 23:11:45,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 23:11:45,713 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:45,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 23:11:45,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:11:45,713 INFO L87 Difference]: Start difference. First operand 143 states and 183 transitions. Second operand 8 states. [2019-11-15 23:11:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:45,927 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2019-11-15 23:11:45,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 23:11:45,928 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-11-15 23:11:45,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:45,930 INFO L225 Difference]: With dead ends: 174 [2019-11-15 23:11:45,930 INFO L226 Difference]: Without dead ends: 173 [2019-11-15 23:11:45,931 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-11-15 23:11:45,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-11-15 23:11:45,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2019-11-15 23:11:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-15 23:11:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2019-11-15 23:11:45,951 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 25 [2019-11-15 23:11:45,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:45,951 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2019-11-15 23:11:45,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 23:11:45,951 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2019-11-15 23:11:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-15 23:11:45,953 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:45,953 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2019-11-15 23:11:46,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:46,159 INFO L410 AbstractCegarLoop]: === Iteration 11 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:46,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:46,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1828550785, now seen corresponding path program 4 times [2019-11-15 23:11:46,159 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:46,159 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505803089] [2019-11-15 23:11:46,159 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:46,159 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:46,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:11:46,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505803089] [2019-11-15 23:11:46,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413574652] [2019-11-15 23:11:46,297 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:46,324 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:11:46,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:11:46,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-15 23:11:46,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:11:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-15 23:11:46,386 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:11:46,386 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 13 [2019-11-15 23:11:46,386 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454009042] [2019-11-15 23:11:46,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-15 23:11:46,387 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:46,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-15 23:11:46,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-15 23:11:46,388 INFO L87 Difference]: Start difference. First operand 161 states and 206 transitions. Second operand 14 states. [2019-11-15 23:11:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:46,503 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2019-11-15 23:11:46,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 23:11:46,507 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-11-15 23:11:46,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:46,509 INFO L225 Difference]: With dead ends: 165 [2019-11-15 23:11:46,509 INFO L226 Difference]: Without dead ends: 164 [2019-11-15 23:11:46,509 INFO L600 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 [2019-11-15 23:11:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-15 23:11:46,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2019-11-15 23:11:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-15 23:11:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 205 transitions. [2019-11-15 23:11:46,533 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 205 transitions. Word has length 27 [2019-11-15 23:11:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:46,534 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 205 transitions. [2019-11-15 23:11:46,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-15 23:11:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 205 transitions. [2019-11-15 23:11:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-15 23:11:46,543 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:46,543 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:46,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:46,747 INFO L410 AbstractCegarLoop]: === Iteration 12 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:46,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:46,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1103662182, now seen corresponding path program 3 times [2019-11-15 23:11:46,747 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:46,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997637370] [2019-11-15 23:11:46,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:46,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:46,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:11:46,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997637370] [2019-11-15 23:11:46,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693942504] [2019-11-15 23:11:46,850 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:46,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-15 23:11:46,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:11:46,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-15 23:11:46,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:11:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:11:46,893 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:11:46,894 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-15 23:11:46,894 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35554798] [2019-11-15 23:11:46,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 23:11:46,894 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:46,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 23:11:46,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:11:46,895 INFO L87 Difference]: Start difference. First operand 161 states and 205 transitions. Second operand 10 states. [2019-11-15 23:11:47,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:47,183 INFO L93 Difference]: Finished difference Result 194 states and 248 transitions. [2019-11-15 23:11:47,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-15 23:11:47,184 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-15 23:11:47,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:47,186 INFO L225 Difference]: With dead ends: 194 [2019-11-15 23:11:47,186 INFO L226 Difference]: Without dead ends: 193 [2019-11-15 23:11:47,187 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-11-15 23:11:47,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-15 23:11:47,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 179. [2019-11-15 23:11:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-11-15 23:11:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 228 transitions. [2019-11-15 23:11:47,208 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 228 transitions. Word has length 30 [2019-11-15 23:11:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:47,209 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 228 transitions. [2019-11-15 23:11:47,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 23:11:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 228 transitions. [2019-11-15 23:11:47,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-15 23:11:47,211 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:47,211 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:47,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:47,414 INFO L410 AbstractCegarLoop]: === Iteration 13 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:47,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:47,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1629013057, now seen corresponding path program 1 times [2019-11-15 23:11:47,415 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:47,415 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449133232] [2019-11-15 23:11:47,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:47,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:47,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-15 23:11:47,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449133232] [2019-11-15 23:11:47,468 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:11:47,468 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 23:11:47,468 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505096849] [2019-11-15 23:11:47,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:11:47,469 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:47,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:11:47,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:11:47,469 INFO L87 Difference]: Start difference. First operand 179 states and 228 transitions. Second operand 5 states. [2019-11-15 23:11:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:47,496 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2019-11-15 23:11:47,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:11:47,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-11-15 23:11:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:47,501 INFO L225 Difference]: With dead ends: 179 [2019-11-15 23:11:47,501 INFO L226 Difference]: Without dead ends: 178 [2019-11-15 23:11:47,502 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:11:47,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-11-15 23:11:47,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2019-11-15 23:11:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-15 23:11:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 218 transitions. [2019-11-15 23:11:47,514 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 218 transitions. Word has length 31 [2019-11-15 23:11:47,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:47,514 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 218 transitions. [2019-11-15 23:11:47,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:11:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 218 transitions. [2019-11-15 23:11:47,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-15 23:11:47,516 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:47,516 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:47,516 INFO L410 AbstractCegarLoop]: === Iteration 14 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:47,517 INFO L82 PathProgramCache]: Analyzing trace with hash 857271516, now seen corresponding path program 4 times [2019-11-15 23:11:47,517 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:47,517 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121548197] [2019-11-15 23:11:47,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:47,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:47,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:11:47,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121548197] [2019-11-15 23:11:47,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626003753] [2019-11-15 23:11:47,611 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:47,646 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:11:47,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:11:47,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-15 23:11:47,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:11:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-15 23:11:47,704 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 23:11:47,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2019-11-15 23:11:47,704 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29693197] [2019-11-15 23:11:47,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 23:11:47,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:47,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 23:11:47,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-11-15 23:11:47,706 INFO L87 Difference]: Start difference. First operand 178 states and 218 transitions. Second operand 6 states. [2019-11-15 23:11:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:47,779 INFO L93 Difference]: Finished difference Result 239 states and 303 transitions. [2019-11-15 23:11:47,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 23:11:47,780 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-11-15 23:11:47,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:47,781 INFO L225 Difference]: With dead ends: 239 [2019-11-15 23:11:47,781 INFO L226 Difference]: Without dead ends: 111 [2019-11-15 23:11:47,783 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2019-11-15 23:11:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-15 23:11:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2019-11-15 23:11:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-15 23:11:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2019-11-15 23:11:47,792 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 35 [2019-11-15 23:11:47,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:47,793 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2019-11-15 23:11:47,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 23:11:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2019-11-15 23:11:47,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-15 23:11:47,794 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:47,795 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:47,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:47,998 INFO L410 AbstractCegarLoop]: === Iteration 15 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash -490250333, now seen corresponding path program 1 times [2019-11-15 23:11:47,998 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:47,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779201079] [2019-11-15 23:11:47,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:47,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:47,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-15 23:11:48,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779201079] [2019-11-15 23:11:48,068 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:11:48,068 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-15 23:11:48,068 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023589904] [2019-11-15 23:11:48,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:11:48,069 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:48,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:11:48,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:11:48,069 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand 7 states. [2019-11-15 23:11:48,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:48,202 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2019-11-15 23:11:48,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 23:11:48,203 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-11-15 23:11:48,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:48,204 INFO L225 Difference]: With dead ends: 106 [2019-11-15 23:11:48,204 INFO L226 Difference]: Without dead ends: 105 [2019-11-15 23:11:48,205 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:11:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-15 23:11:48,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-11-15 23:11:48,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-15 23:11:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2019-11-15 23:11:48,219 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 35 [2019-11-15 23:11:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:48,219 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2019-11-15 23:11:48,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:11:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2019-11-15 23:11:48,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-15 23:11:48,220 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:48,221 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:48,221 INFO L410 AbstractCegarLoop]: === Iteration 16 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:48,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:48,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1982108899, now seen corresponding path program 1 times [2019-11-15 23:11:48,222 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:48,222 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601245636] [2019-11-15 23:11:48,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:48,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:48,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-15 23:11:48,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601245636] [2019-11-15 23:11:48,299 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:11:48,299 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-15 23:11:48,299 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149729765] [2019-11-15 23:11:48,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:11:48,300 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:48,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:11:48,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:11:48,300 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand 7 states. [2019-11-15 23:11:48,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:48,434 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2019-11-15 23:11:48,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 23:11:48,435 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-11-15 23:11:48,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:48,436 INFO L225 Difference]: With dead ends: 124 [2019-11-15 23:11:48,436 INFO L226 Difference]: Without dead ends: 123 [2019-11-15 23:11:48,437 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:11:48,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-15 23:11:48,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2019-11-15 23:11:48,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-15 23:11:48,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2019-11-15 23:11:48,447 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 36 [2019-11-15 23:11:48,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:48,448 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2019-11-15 23:11:48,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:11:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2019-11-15 23:11:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-15 23:11:48,450 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:48,450 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:48,450 INFO L410 AbstractCegarLoop]: === Iteration 17 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:48,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:48,451 INFO L82 PathProgramCache]: Analyzing trace with hash -732976513, now seen corresponding path program 2 times [2019-11-15 23:11:48,451 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:48,451 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738010760] [2019-11-15 23:11:48,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:48,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:48,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-15 23:11:48,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738010760] [2019-11-15 23:11:48,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445826837] [2019-11-15 23:11:48,544 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:48,601 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:11:48,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:11:48,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-15 23:11:48,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:11:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-15 23:11:48,615 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:11:48,615 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-15 23:11:48,616 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889202164] [2019-11-15 23:11:48,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 23:11:48,616 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:48,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 23:11:48,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-15 23:11:48,617 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 9 states. [2019-11-15 23:11:48,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:48,850 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2019-11-15 23:11:48,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-15 23:11:48,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2019-11-15 23:11:48,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:48,852 INFO L225 Difference]: With dead ends: 140 [2019-11-15 23:11:48,852 INFO L226 Difference]: Without dead ends: 139 [2019-11-15 23:11:48,853 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-11-15 23:11:48,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-15 23:11:48,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-11-15 23:11:48,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-11-15 23:11:48,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2019-11-15 23:11:48,861 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 41 [2019-11-15 23:11:48,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:48,861 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2019-11-15 23:11:48,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 23:11:48,862 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2019-11-15 23:11:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-15 23:11:48,863 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:48,863 INFO L380 BasicCegarLoop]: trace histogram [7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:49,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:49,070 INFO L410 AbstractCegarLoop]: === Iteration 18 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:49,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:49,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2029893219, now seen corresponding path program 3 times [2019-11-15 23:11:49,071 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:49,071 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131736090] [2019-11-15 23:11:49,071 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:49,071 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:49,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-15 23:11:49,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131736090] [2019-11-15 23:11:49,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147105344] [2019-11-15 23:11:49,181 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:49,242 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-15 23:11:49,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:11:49,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 23:11:49,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:11:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-15 23:11:49,256 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:11:49,256 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-15 23:11:49,256 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722744945] [2019-11-15 23:11:49,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 23:11:49,257 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:49,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 23:11:49,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:11:49,258 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand 11 states. [2019-11-15 23:11:49,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:49,595 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2019-11-15 23:11:49,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-15 23:11:49,596 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2019-11-15 23:11:49,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:49,597 INFO L225 Difference]: With dead ends: 158 [2019-11-15 23:11:49,597 INFO L226 Difference]: Without dead ends: 157 [2019-11-15 23:11:49,598 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2019-11-15 23:11:49,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-15 23:11:49,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-11-15 23:11:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-15 23:11:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2019-11-15 23:11:49,610 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 46 [2019-11-15 23:11:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:49,610 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2019-11-15 23:11:49,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 23:11:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2019-11-15 23:11:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-15 23:11:49,612 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:49,612 INFO L380 BasicCegarLoop]: trace histogram [8, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:49,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:49,815 INFO L410 AbstractCegarLoop]: === Iteration 19 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:49,815 INFO L82 PathProgramCache]: Analyzing trace with hash -613451521, now seen corresponding path program 4 times [2019-11-15 23:11:49,815 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:49,816 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338722370] [2019-11-15 23:11:49,816 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:49,816 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:49,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-15 23:11:49,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338722370] [2019-11-15 23:11:49,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393923420] [2019-11-15 23:11:49,962 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:50,026 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:11:50,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:11:50,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-15 23:11:50,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:11:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-15 23:11:50,046 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:11:50,046 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-11-15 23:11:50,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800479944] [2019-11-15 23:11:50,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-15 23:11:50,047 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:50,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-15 23:11:50,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:11:50,048 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand 13 states. [2019-11-15 23:11:50,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:50,518 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2019-11-15 23:11:50,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-15 23:11:50,522 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-15 23:11:50,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:50,524 INFO L225 Difference]: With dead ends: 176 [2019-11-15 23:11:50,524 INFO L226 Difference]: Without dead ends: 175 [2019-11-15 23:11:50,525 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2019-11-15 23:11:50,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-15 23:11:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-15 23:11:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-15 23:11:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 203 transitions. [2019-11-15 23:11:50,536 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 203 transitions. Word has length 51 [2019-11-15 23:11:50,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:50,536 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 203 transitions. [2019-11-15 23:11:50,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-15 23:11:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 203 transitions. [2019-11-15 23:11:50,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-15 23:11:50,538 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:11:50,538 INFO L380 BasicCegarLoop]: trace histogram [9, 7, 7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-15 23:11:50,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:50,740 INFO L410 AbstractCegarLoop]: === Iteration 20 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 23:11:50,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:11:50,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1845164003, now seen corresponding path program 5 times [2019-11-15 23:11:50,741 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:11:50,741 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717835432] [2019-11-15 23:11:50,741 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:50,741 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:11:50,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:11:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:11:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 46 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-15 23:11:50,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717835432] [2019-11-15 23:11:50,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380745845] [2019-11-15 23:11:50,879 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:50,914 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-15 23:11:50,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:11:50,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-15 23:11:50,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:11:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-15 23:11:50,973 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 23:11:50,973 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 20 [2019-11-15 23:11:50,973 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427979351] [2019-11-15 23:11:50,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:11:50,973 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:11:50,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:11:50,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2019-11-15 23:11:50,974 INFO L87 Difference]: Start difference. First operand 175 states and 203 transitions. Second operand 7 states. [2019-11-15 23:11:51,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:11:51,031 INFO L93 Difference]: Finished difference Result 215 states and 251 transitions. [2019-11-15 23:11:51,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:11:51,031 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2019-11-15 23:11:51,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:11:51,032 INFO L225 Difference]: With dead ends: 215 [2019-11-15 23:11:51,032 INFO L226 Difference]: Without dead ends: 0 [2019-11-15 23:11:51,033 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2019-11-15 23:11:51,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-15 23:11:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-15 23:11:51,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-15 23:11:51,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-15 23:11:51,034 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2019-11-15 23:11:51,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:11:51,034 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 23:11:51,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:11:51,034 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-15 23:11:51,034 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-15 23:11:51,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:11:51,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-15 23:11:51,461 INFO L443 ceAbstractionStarter]: For program point gFINAL(lines 10 16) no Hoare annotation was computed. [2019-11-15 23:11:51,462 INFO L443 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-11-15 23:11:51,462 INFO L443 ceAbstractionStarter]: For program point L15-1(line 15) no Hoare annotation was computed. [2019-11-15 23:11:51,462 INFO L443 ceAbstractionStarter]: For program point gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-15 23:11:51,462 INFO L439 ceAbstractionStarter]: At program point L15-2(line 15) the Hoare annotation is: (and (not (= 0 |g_#in~x|)) (or (and (<= 0 g_~x) (<= g_~x 2147483647) (not (= 0 g_~x))) (not (<= 0 |g_#in~x|)) (not (<= |g_#in~x| 2147483647)))) [2019-11-15 23:11:51,462 INFO L443 ceAbstractionStarter]: For program point L12(lines 12 15) no Hoare annotation was computed. [2019-11-15 23:11:51,462 INFO L443 ceAbstractionStarter]: For program point gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-15 23:11:51,462 INFO L443 ceAbstractionStarter]: For program point L15-3(line 15) no Hoare annotation was computed. [2019-11-15 23:11:51,463 INFO L443 ceAbstractionStarter]: For program point L15-4(line 15) no Hoare annotation was computed. [2019-11-15 23:11:51,463 INFO L443 ceAbstractionStarter]: For program point L15-5(line 15) no Hoare annotation was computed. [2019-11-15 23:11:51,463 INFO L439 ceAbstractionStarter]: At program point L15-6(line 15) the Hoare annotation is: (and (not (= 0 |g_#in~x|)) (or (not (<= 0 |g_#in~x|)) (and (<= 0 g_~x) (<= g_~x 2147483647) (<= |g_#t~ret0| 1) (<= 1 |g_#t~ret0|) (not (= 0 g_~x))) (not (<= |g_#in~x| 2147483647)))) [2019-11-15 23:11:51,463 INFO L443 ceAbstractionStarter]: For program point gEXIT(lines 10 16) no Hoare annotation was computed. [2019-11-15 23:11:51,463 INFO L443 ceAbstractionStarter]: For program point L15-7(line 15) no Hoare annotation was computed. [2019-11-15 23:11:51,463 INFO L443 ceAbstractionStarter]: For program point gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-15 23:11:51,463 INFO L443 ceAbstractionStarter]: For program point gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-15 23:11:51,463 INFO L446 ceAbstractionStarter]: At program point gENTRY(lines 10 16) the Hoare annotation is: true [2019-11-15 23:11:51,464 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-15 23:11:51,464 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-15 23:11:51,464 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-15 23:11:51,464 INFO L439 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 ULTIMATE.start_main_~x~0)) [2019-11-15 23:11:51,464 INFO L443 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2019-11-15 23:11:51,464 INFO L443 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-11-15 23:11:51,464 INFO L439 ceAbstractionStarter]: At program point L18(lines 18 22) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2019-11-15 23:11:51,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 11:11:51 BoogieIcfgContainer [2019-11-15 23:11:51,484 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 23:11:51,485 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 23:11:51,485 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 23:11:51,485 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 23:11:51,486 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:11:42" (3/4) ... [2019-11-15 23:11:51,489 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-15 23:11:51,495 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure g [2019-11-15 23:11:51,498 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-15 23:11:51,499 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-15 23:11:51,548 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_71ac270d-80fc-480e-a91a-d04b5e7cdd37/bin/uautomizer/witness.graphml [2019-11-15 23:11:51,548 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 23:11:51,550 INFO L168 Benchmark]: Toolchain (without parser) took 9500.90 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 296.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -167.8 MB). Peak memory consumption was 128.4 MB. Max. memory is 11.5 GB. [2019-11-15 23:11:51,551 INFO L168 Benchmark]: CDTParser took 0.23 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. [2019-11-15 23:11:51,551 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -170.5 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-11-15 23:11:51,552 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.05 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:11:51,552 INFO L168 Benchmark]: Boogie Preprocessor took 21.89 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:11:51,552 INFO L168 Benchmark]: RCFGBuilder took 277.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 11.5 GB. [2019-11-15 23:11:51,553 INFO L168 Benchmark]: TraceAbstraction took 8803.38 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 171.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -26.8 MB). Peak memory consumption was 144.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:11:51,553 INFO L168 Benchmark]: Witness Printer took 63.84 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: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 11.5 GB. [2019-11-15 23:11:51,555 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 297.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -170.5 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.05 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.89 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 277.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8803.38 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 171.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -26.8 MB). Peak memory consumption was 144.7 MB. Max. memory is 11.5 GB. * Witness Printer took 63.84 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: 12.3 MB). Peak memory consumption was 12.3 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: 8.7s, OverallIterations: 20, TraceHistogramMax: 9, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 371 SDtfs, 640 SDslu, 1406 SDs, 0 SdLazy, 1497 SolverSat, 344 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 690 GetRequests, 438 SyntacticMatches, 4 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=179occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 89 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 170 PreInvPairs, 182 NumberOfFragments, 67 HoareAnnotationTreeSize, 170 FomulaSimplifications, 254 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 410 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 907 NumberOfCodeBlocks, 866 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 876 ConstructedInterpolants, 0 QuantifiedInterpolants, 77162 SizeOfPredicates, 30 NumberOfNonLiveVariables, 656 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 31 InterpolantComputations, 11 PerfectInterpolantSequences, 934/1271 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...