./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/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 457415f9b28998cf0ba7f80d69eaf14873f5a98f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 18:24:29,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:24:29,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:24:29,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:24:29,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:24:29,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:24:29,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:24:29,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:24:29,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:24:29,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:24:29,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:24:29,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:24:29,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:24:29,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:24:29,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:24:29,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:24:29,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:24:29,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:24:29,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:24:29,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:24:29,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:24:29,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:24:29,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:24:29,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:24:29,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:24:29,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:24:29,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:24:29,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:24:29,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:24:29,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:24:29,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:24:29,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:24:29,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:24:29,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:24:29,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:24:29,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:24:29,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:24:29,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:24:29,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:24:29,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:24:29,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:24:29,501 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-12-07 18:24:29,511 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:24:29,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:24:29,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:24:29,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:24:29,512 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:24:29,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:24:29,512 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 18:24:29,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:24:29,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:24:29,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:24:29,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:24:29,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:24:29,513 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-12-07 18:24:29,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:24:29,513 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:24:29,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:24:29,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:24:29,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:24:29,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:24:29,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:24:29,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:24:29,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:24:29,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:24:29,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:24:29,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:24:29,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:24:29,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:24:29,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:24:29,515 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_fac93e0b-723e-4e92-ab4d-b362ef6178a4/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 -> 457415f9b28998cf0ba7f80d69eaf14873f5a98f [2019-12-07 18:24:29,615 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:24:29,625 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:24:29,628 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:24:29,629 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:24:29,629 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:24:29,630 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2019-12-07 18:24:29,674 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/data/b9235edca/27fc0b58043c411fbf53c10c94762c82/FLAG6245053db [2019-12-07 18:24:30,077 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:24:30,078 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2019-12-07 18:24:30,081 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/data/b9235edca/27fc0b58043c411fbf53c10c94762c82/FLAG6245053db [2019-12-07 18:24:30,089 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/data/b9235edca/27fc0b58043c411fbf53c10c94762c82 [2019-12-07 18:24:30,091 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:24:30,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:24:30,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:24:30,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:24:30,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:24:30,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:24:30" (1/1) ... [2019-12-07 18:24:30,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@431cfabc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:24:30, skipping insertion in model container [2019-12-07 18:24:30,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:24:30" (1/1) ... [2019-12-07 18:24:30,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:24:30,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:24:30,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:24:30,209 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:24:30,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:24:30,259 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:24:30,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:24:30 WrapperNode [2019-12-07 18:24:30,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:24:30,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:24:30,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:24:30,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:24:30,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:24:30" (1/1) ... [2019-12-07 18:24:30,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:24:30" (1/1) ... [2019-12-07 18:24:30,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:24:30,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:24:30,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:24:30,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:24:30,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:24:30" (1/1) ... [2019-12-07 18:24:30,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:24:30" (1/1) ... [2019-12-07 18:24:30,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:24:30" (1/1) ... [2019-12-07 18:24:30,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:24:30" (1/1) ... [2019-12-07 18:24:30,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:24:30" (1/1) ... [2019-12-07 18:24:30,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:24:30" (1/1) ... [2019-12-07 18:24:30,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:24:30" (1/1) ... [2019-12-07 18:24:30,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:24:30,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:24:30,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:24:30,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:24:30,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:24:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/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 [2019-12-07 18:24:30,331 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-12-07 18:24:30,332 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-12-07 18:24:30,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:24:30,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:24:30,436 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:24:30,437 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 18:24:30,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:24:30 BoogieIcfgContainer [2019-12-07 18:24:30,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:24:30,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:24:30,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:24:30,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:24:30,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:24:30" (1/3) ... [2019-12-07 18:24:30,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ed719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:24:30, skipping insertion in model container [2019-12-07 18:24:30,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:24:30" (2/3) ... [2019-12-07 18:24:30,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ed719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:24:30, skipping insertion in model container [2019-12-07 18:24:30,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:24:30" (3/3) ... [2019-12-07 18:24:30,442 INFO L109 eAbstractionObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex5.c [2019-12-07 18:24:30,449 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:24:30,453 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-12-07 18:24:30,460 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-12-07 18:24:30,474 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:24:30,474 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:24:30,474 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:24:30,474 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:24:30,475 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:24:30,475 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:24:30,475 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:24:30,475 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:24:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-12-07 18:24:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 18:24:30,489 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:30,489 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:30,490 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:30,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:30,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1461861353, now seen corresponding path program 1 times [2019-12-07 18:24:30,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:30,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618761290] [2019-12-07 18:24:30,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:30,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618761290] [2019-12-07 18:24:30,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:24:30,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 18:24:30,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153345581] [2019-12-07 18:24:30,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:24:30,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:30,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:24:30,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:24:30,634 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2019-12-07 18:24:30,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:30,704 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-12-07 18:24:30,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:24:30,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-12-07 18:24:30,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:30,711 INFO L225 Difference]: With dead ends: 44 [2019-12-07 18:24:30,712 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 18:24:30,714 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:24:30,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 18:24:30,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-12-07 18:24:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 18:24:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-12-07 18:24:30,738 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2019-12-07 18:24:30,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:30,738 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-12-07 18:24:30,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:24:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-12-07 18:24:30,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 18:24:30,739 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:30,739 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:30,739 INFO L410 AbstractCegarLoop]: === Iteration 2 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:30,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1461861577, now seen corresponding path program 1 times [2019-12-07 18:24:30,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:30,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030321818] [2019-12-07 18:24:30,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:30,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030321818] [2019-12-07 18:24:30,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:24:30,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 18:24:30,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939643420] [2019-12-07 18:24:30,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:24:30,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:30,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:24:30,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:24:30,772 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2019-12-07 18:24:30,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:30,804 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-12-07 18:24:30,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:24:30,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-12-07 18:24:30,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:30,805 INFO L225 Difference]: With dead ends: 34 [2019-12-07 18:24:30,805 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 18:24:30,806 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:24:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 18:24:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2019-12-07 18:24:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:24:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-12-07 18:24:30,810 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 7 [2019-12-07 18:24:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:30,811 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-12-07 18:24:30,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:24:30,811 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-12-07 18:24:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 18:24:30,811 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:30,811 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:30,811 INFO L410 AbstractCegarLoop]: === Iteration 3 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:30,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1926938272, now seen corresponding path program 1 times [2019-12-07 18:24:30,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:30,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982717817] [2019-12-07 18:24:30,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:30,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982717817] [2019-12-07 18:24:30,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:24:30,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 18:24:30,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473027110] [2019-12-07 18:24:30,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:24:30,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:30,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:24:30,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:24:30,837 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-12-07 18:24:30,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:30,865 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-12-07 18:24:30,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:24:30,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-07 18:24:30,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:30,866 INFO L225 Difference]: With dead ends: 33 [2019-12-07 18:24:30,867 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 18:24:30,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:24:30,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 18:24:30,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-12-07 18:24:30,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 18:24:30,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-12-07 18:24:30,871 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2019-12-07 18:24:30,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:30,871 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-12-07 18:24:30,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:24:30,872 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-12-07 18:24:30,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 18:24:30,872 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:30,872 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:30,872 INFO L410 AbstractCegarLoop]: === Iteration 4 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:30,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:30,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1926931321, now seen corresponding path program 1 times [2019-12-07 18:24:30,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:30,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448888281] [2019-12-07 18:24:30,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:30,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448888281] [2019-12-07 18:24:30,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:24:30,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 18:24:30,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233056651] [2019-12-07 18:24:30,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:24:30,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:30,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:24:30,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:24:30,894 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-12-07 18:24:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:30,918 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-12-07 18:24:30,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:24:30,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-07 18:24:30,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:30,919 INFO L225 Difference]: With dead ends: 32 [2019-12-07 18:24:30,919 INFO L226 Difference]: Without dead ends: 31 [2019-12-07 18:24:30,919 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:24:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-07 18:24:30,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-12-07 18:24:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 18:24:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-12-07 18:24:30,923 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2019-12-07 18:24:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:30,924 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-12-07 18:24:30,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:24:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-12-07 18:24:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 18:24:30,924 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:30,924 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:30,924 INFO L410 AbstractCegarLoop]: === Iteration 5 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:30,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1954337320, now seen corresponding path program 1 times [2019-12-07 18:24:30,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:30,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594147993] [2019-12-07 18:24:30,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:30,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594147993] [2019-12-07 18:24:30,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:24:30,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 18:24:30,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589406579] [2019-12-07 18:24:30,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:24:30,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:30,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:24:30,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:24:30,952 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2019-12-07 18:24:31,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:31,004 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-12-07 18:24:31,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:24:31,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-12-07 18:24:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:31,004 INFO L225 Difference]: With dead ends: 43 [2019-12-07 18:24:31,005 INFO L226 Difference]: Without dead ends: 42 [2019-12-07 18:24:31,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:24:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-07 18:24:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-12-07 18:24:31,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 18:24:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-12-07 18:24:31,010 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 13 [2019-12-07 18:24:31,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:31,010 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-12-07 18:24:31,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:24:31,010 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-12-07 18:24:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 18:24:31,010 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:31,010 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:31,011 INFO L410 AbstractCegarLoop]: === Iteration 6 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:31,011 INFO L82 PathProgramCache]: Analyzing trace with hash -906050173, now seen corresponding path program 1 times [2019-12-07 18:24:31,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:31,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129894946] [2019-12-07 18:24:31,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:31,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129894946] [2019-12-07 18:24:31,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546926724] [2019-12-07 18:24:31,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/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 [2019-12-07 18:24:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:31,056 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 18:24:31,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:31,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:24:31,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2019-12-07 18:24:31,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605434416] [2019-12-07 18:24:31,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:24:31,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:31,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:24:31,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:24:31,091 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 5 states. [2019-12-07 18:24:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:31,135 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-12-07 18:24:31,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:24:31,135 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-12-07 18:24:31,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:31,135 INFO L225 Difference]: With dead ends: 38 [2019-12-07 18:24:31,135 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 18:24:31,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-12-07 18:24:31,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 18:24:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-12-07 18:24:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:24:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-12-07 18:24:31,140 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2019-12-07 18:24:31,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:31,140 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-12-07 18:24:31,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:24:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-12-07 18:24:31,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 18:24:31,141 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:31,141 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:31,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:31,342 INFO L410 AbstractCegarLoop]: === Iteration 7 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:31,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:31,343 INFO L82 PathProgramCache]: Analyzing trace with hash -906049949, now seen corresponding path program 1 times [2019-12-07 18:24:31,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:31,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896591190] [2019-12-07 18:24:31,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:31,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896591190] [2019-12-07 18:24:31,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21166951] [2019-12-07 18:24:31,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/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 [2019-12-07 18:24:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:31,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 18:24:31,415 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:31,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:31,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-12-07 18:24:31,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4974607] [2019-12-07 18:24:31,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 18:24:31,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:31,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 18:24:31,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:24:31,419 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2019-12-07 18:24:31,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:31,519 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2019-12-07 18:24:31,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 18:24:31,520 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-12-07 18:24:31,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:31,520 INFO L225 Difference]: With dead ends: 65 [2019-12-07 18:24:31,521 INFO L226 Difference]: Without dead ends: 64 [2019-12-07 18:24:31,521 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-07 18:24:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-07 18:24:31,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2019-12-07 18:24:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 18:24:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2019-12-07 18:24:31,528 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 13 [2019-12-07 18:24:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:31,528 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2019-12-07 18:24:31,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 18:24:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2019-12-07 18:24:31,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 18:24:31,529 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:31,529 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:31,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:31,730 INFO L410 AbstractCegarLoop]: === Iteration 8 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:31,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:31,730 INFO L82 PathProgramCache]: Analyzing trace with hash 454907873, now seen corresponding path program 1 times [2019-12-07 18:24:31,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:31,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141906950] [2019-12-07 18:24:31,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:31,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141906950] [2019-12-07 18:24:31,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54526109] [2019-12-07 18:24:31,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/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 [2019-12-07 18:24:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:31,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:24:31,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:31,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:31,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2019-12-07 18:24:31,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994068594] [2019-12-07 18:24:31,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 18:24:31,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:31,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:24:31,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:24:31,842 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 10 states. [2019-12-07 18:24:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:31,960 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2019-12-07 18:24:31,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 18:24:31,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-07 18:24:31,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:31,961 INFO L225 Difference]: With dead ends: 64 [2019-12-07 18:24:31,961 INFO L226 Difference]: Without dead ends: 39 [2019-12-07 18:24:31,962 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:24:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-07 18:24:31,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2019-12-07 18:24:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 18:24:31,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-12-07 18:24:31,967 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 14 [2019-12-07 18:24:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:31,967 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-12-07 18:24:31,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 18:24:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-12-07 18:24:31,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 18:24:31,968 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:31,968 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:32,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:32,169 INFO L410 AbstractCegarLoop]: === Iteration 9 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:32,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:32,170 INFO L82 PathProgramCache]: Analyzing trace with hash 454914824, now seen corresponding path program 1 times [2019-12-07 18:24:32,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:32,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006440716] [2019-12-07 18:24:32,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:32,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006440716] [2019-12-07 18:24:32,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828616589] [2019-12-07 18:24:32,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/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 [2019-12-07 18:24:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:32,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 18:24:32,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:32,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:24:32,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2019-12-07 18:24:32,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118080850] [2019-12-07 18:24:32,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:24:32,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:32,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:24:32,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:24:32,243 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2019-12-07 18:24:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:32,280 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-12-07 18:24:32,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:24:32,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-12-07 18:24:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:32,281 INFO L225 Difference]: With dead ends: 38 [2019-12-07 18:24:32,281 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 18:24:32,282 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:24:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 18:24:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-12-07 18:24:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 18:24:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-12-07 18:24:32,286 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2019-12-07 18:24:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:32,286 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-12-07 18:24:32,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:24:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-12-07 18:24:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 18:24:32,287 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:32,287 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:32,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:32,488 INFO L410 AbstractCegarLoop]: === Iteration 10 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:32,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:32,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1977222701, now seen corresponding path program 1 times [2019-12-07 18:24:32,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:32,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912863938] [2019-12-07 18:24:32,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:32,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912863938] [2019-12-07 18:24:32,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557565159] [2019-12-07 18:24:32,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/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 [2019-12-07 18:24:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:32,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:24:32,557 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:32,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:32,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-12-07 18:24:32,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901722327] [2019-12-07 18:24:32,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 18:24:32,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:32,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 18:24:32,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:24:32,561 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 7 states. [2019-12-07 18:24:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:32,607 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2019-12-07 18:24:32,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:24:32,608 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-12-07 18:24:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:32,608 INFO L225 Difference]: With dead ends: 45 [2019-12-07 18:24:32,608 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 18:24:32,609 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:24:32,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 18:24:32,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-12-07 18:24:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 18:24:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-12-07 18:24:32,614 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 14 [2019-12-07 18:24:32,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:32,614 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-12-07 18:24:32,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 18:24:32,614 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-12-07 18:24:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 18:24:32,615 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:32,615 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2019-12-07 18:24:32,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:32,816 INFO L410 AbstractCegarLoop]: === Iteration 11 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:32,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:32,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1341115267, now seen corresponding path program 2 times [2019-12-07 18:24:32,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:32,817 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228470981] [2019-12-07 18:24:32,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:32,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228470981] [2019-12-07 18:24:32,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674640944] [2019-12-07 18:24:32,903 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/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 [2019-12-07 18:24:32,932 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:24:32,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:24:32,933 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:24:32,934 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:32,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:32,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-12-07 18:24:32,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608185646] [2019-12-07 18:24:32,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 18:24:32,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:32,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 18:24:32,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:24:32,966 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 12 states. [2019-12-07 18:24:33,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:33,169 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2019-12-07 18:24:33,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 18:24:33,169 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-12-07 18:24:33,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:33,170 INFO L225 Difference]: With dead ends: 78 [2019-12-07 18:24:33,170 INFO L226 Difference]: Without dead ends: 77 [2019-12-07 18:24:33,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2019-12-07 18:24:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-07 18:24:33,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 24. [2019-12-07 18:24:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 18:24:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-12-07 18:24:33,175 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2019-12-07 18:24:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:33,175 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-12-07 18:24:33,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 18:24:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-12-07 18:24:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 18:24:33,176 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:33,176 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:33,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:33,377 INFO L410 AbstractCegarLoop]: === Iteration 12 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:33,377 INFO L82 PathProgramCache]: Analyzing trace with hash 451770350, now seen corresponding path program 1 times [2019-12-07 18:24:33,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:33,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382416576] [2019-12-07 18:24:33,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:33,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382416576] [2019-12-07 18:24:33,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441512192] [2019-12-07 18:24:33,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/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 [2019-12-07 18:24:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:33,497 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 18:24:33,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:33,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:33,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-12-07 18:24:33,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038443740] [2019-12-07 18:24:33,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 18:24:33,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:33,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 18:24:33,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:24:33,507 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2019-12-07 18:24:33,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:33,576 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2019-12-07 18:24:33,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 18:24:33,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-12-07 18:24:33,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:33,577 INFO L225 Difference]: With dead ends: 37 [2019-12-07 18:24:33,577 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 18:24:33,577 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-07 18:24:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 18:24:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2019-12-07 18:24:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 18:24:33,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-12-07 18:24:33,581 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2019-12-07 18:24:33,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:33,581 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-12-07 18:24:33,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 18:24:33,582 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-12-07 18:24:33,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 18:24:33,582 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:33,582 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2019-12-07 18:24:33,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:33,783 INFO L410 AbstractCegarLoop]: === Iteration 13 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:33,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:33,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1375099731, now seen corresponding path program 2 times [2019-12-07 18:24:33,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:33,784 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504372990] [2019-12-07 18:24:33,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:33,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504372990] [2019-12-07 18:24:33,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290645689] [2019-12-07 18:24:33,852 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/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 [2019-12-07 18:24:33,873 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:24:33,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:24:33,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 18:24:33,875 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:33,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:33,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-12-07 18:24:33,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340647691] [2019-12-07 18:24:33,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 18:24:33,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:33,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 18:24:33,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:24:33,879 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2019-12-07 18:24:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:33,942 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2019-12-07 18:24:33,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:24:33,943 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-12-07 18:24:33,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:33,943 INFO L225 Difference]: With dead ends: 43 [2019-12-07 18:24:33,943 INFO L226 Difference]: Without dead ends: 42 [2019-12-07 18:24:33,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:24:33,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-07 18:24:33,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2019-12-07 18:24:33,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 18:24:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-12-07 18:24:33,947 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 20 [2019-12-07 18:24:33,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:33,947 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-12-07 18:24:33,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 18:24:33,947 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-12-07 18:24:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-07 18:24:33,947 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:33,948 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:34,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:34,149 INFO L410 AbstractCegarLoop]: === Iteration 14 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:34,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:34,149 INFO L82 PathProgramCache]: Analyzing trace with hash 511948884, now seen corresponding path program 2 times [2019-12-07 18:24:34,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:34,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50917376] [2019-12-07 18:24:34,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:34,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50917376] [2019-12-07 18:24:34,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120046422] [2019-12-07 18:24:34,230 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/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 [2019-12-07 18:24:34,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:24:34,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:24:34,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 18:24:34,251 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:34,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:34,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-12-07 18:24:34,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627027238] [2019-12-07 18:24:34,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 18:24:34,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:34,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 18:24:34,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-12-07 18:24:34,256 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2019-12-07 18:24:34,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:34,362 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2019-12-07 18:24:34,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 18:24:34,362 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-12-07 18:24:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:34,362 INFO L225 Difference]: With dead ends: 50 [2019-12-07 18:24:34,362 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 18:24:34,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-12-07 18:24:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 18:24:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2019-12-07 18:24:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 18:24:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-12-07 18:24:34,367 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2019-12-07 18:24:34,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:34,367 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-12-07 18:24:34,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 18:24:34,367 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-12-07 18:24:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 18:24:34,367 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:34,367 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:34,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:34,568 INFO L410 AbstractCegarLoop]: === Iteration 15 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:34,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1009095738, now seen corresponding path program 3 times [2019-12-07 18:24:34,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:34,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905928634] [2019-12-07 18:24:34,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:34,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905928634] [2019-12-07 18:24:34,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118928482] [2019-12-07 18:24:34,654 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/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 [2019-12-07 18:24:34,674 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 18:24:34,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:24:34,675 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 18:24:34,676 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:34,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:34,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-12-07 18:24:34,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501596993] [2019-12-07 18:24:34,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 18:24:34,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:34,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 18:24:34,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-12-07 18:24:34,682 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2019-12-07 18:24:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:34,814 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2019-12-07 18:24:34,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 18:24:34,814 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2019-12-07 18:24:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:34,815 INFO L225 Difference]: With dead ends: 61 [2019-12-07 18:24:34,815 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 18:24:34,815 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2019-12-07 18:24:34,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 18:24:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2019-12-07 18:24:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-07 18:24:34,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-12-07 18:24:34,819 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 32 [2019-12-07 18:24:34,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:34,819 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-12-07 18:24:34,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 18:24:34,819 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-12-07 18:24:34,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 18:24:34,820 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:34,820 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2019-12-07 18:24:35,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:35,021 INFO L410 AbstractCegarLoop]: === Iteration 16 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:35,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:35,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1872988191, now seen corresponding path program 3 times [2019-12-07 18:24:35,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:35,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346506131] [2019-12-07 18:24:35,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:35,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346506131] [2019-12-07 18:24:35,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888693172] [2019-12-07 18:24:35,147 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/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 [2019-12-07 18:24:35,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 18:24:35,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:24:35,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 18:24:35,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:35,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:35,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-12-07 18:24:35,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645593665] [2019-12-07 18:24:35,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 18:24:35,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:35,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 18:24:35,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-12-07 18:24:35,181 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2019-12-07 18:24:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:35,257 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2019-12-07 18:24:35,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 18:24:35,257 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2019-12-07 18:24:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:35,258 INFO L225 Difference]: With dead ends: 67 [2019-12-07 18:24:35,258 INFO L226 Difference]: Without dead ends: 66 [2019-12-07 18:24:35,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:24:35,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-12-07 18:24:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2019-12-07 18:24:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 18:24:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-12-07 18:24:35,263 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 32 [2019-12-07 18:24:35,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:35,263 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-12-07 18:24:35,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 18:24:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-12-07 18:24:35,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-07 18:24:35,264 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:35,264 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:35,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:35,465 INFO L410 AbstractCegarLoop]: === Iteration 17 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:35,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:35,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1485859744, now seen corresponding path program 4 times [2019-12-07 18:24:35,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:35,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766781499] [2019-12-07 18:24:35,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:35,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766781499] [2019-12-07 18:24:35,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919653859] [2019-12-07 18:24:35,571 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:35,594 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:24:35,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:24:35,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 18:24:35,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-12-07 18:24:35,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:35,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 15 [2019-12-07 18:24:35,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643986653] [2019-12-07 18:24:35,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 18:24:35,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:35,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 18:24:35,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:24:35,637 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2019-12-07 18:24:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:35,808 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2019-12-07 18:24:35,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 18:24:35,809 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2019-12-07 18:24:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:35,809 INFO L225 Difference]: With dead ends: 73 [2019-12-07 18:24:35,809 INFO L226 Difference]: Without dead ends: 72 [2019-12-07 18:24:35,810 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2019-12-07 18:24:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-07 18:24:35,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2019-12-07 18:24:35,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-07 18:24:35,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-12-07 18:24:35,814 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 38 [2019-12-07 18:24:35,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:35,815 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-12-07 18:24:35,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 18:24:35,815 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-12-07 18:24:35,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-07 18:24:35,816 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:35,816 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:36,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:36,017 INFO L410 AbstractCegarLoop]: === Iteration 18 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1828298374, now seen corresponding path program 5 times [2019-12-07 18:24:36,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:36,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532479308] [2019-12-07 18:24:36,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:36,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532479308] [2019-12-07 18:24:36,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691214655] [2019-12-07 18:24:36,156 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:36,179 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-07 18:24:36,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:24:36,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 18:24:36,181 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:36,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:36,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2019-12-07 18:24:36,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139966618] [2019-12-07 18:24:36,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 18:24:36,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:36,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 18:24:36,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-12-07 18:24:36,189 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2019-12-07 18:24:36,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:36,407 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2019-12-07 18:24:36,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-07 18:24:36,408 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2019-12-07 18:24:36,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:36,409 INFO L225 Difference]: With dead ends: 92 [2019-12-07 18:24:36,409 INFO L226 Difference]: Without dead ends: 91 [2019-12-07 18:24:36,410 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 18:24:36,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-07 18:24:36,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2019-12-07 18:24:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-07 18:24:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-12-07 18:24:36,417 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 44 [2019-12-07 18:24:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:36,418 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-12-07 18:24:36,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 18:24:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-12-07 18:24:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-07 18:24:36,418 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:36,419 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1] [2019-12-07 18:24:36,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:36,620 INFO L410 AbstractCegarLoop]: === Iteration 19 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:36,620 INFO L82 PathProgramCache]: Analyzing trace with hash 123200235, now seen corresponding path program 4 times [2019-12-07 18:24:36,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:36,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831854786] [2019-12-07 18:24:36,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:36,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831854786] [2019-12-07 18:24:36,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297504408] [2019-12-07 18:24:36,786 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:36,806 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:24:36,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:24:36,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-07 18:24:36,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-07 18:24:36,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:36,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 21 [2019-12-07 18:24:36,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865798678] [2019-12-07 18:24:36,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 18:24:36,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:36,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 18:24:36,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2019-12-07 18:24:36,874 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 22 states. [2019-12-07 18:24:36,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:36,998 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2019-12-07 18:24:36,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 18:24:36,999 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2019-12-07 18:24:36,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:36,999 INFO L225 Difference]: With dead ends: 96 [2019-12-07 18:24:36,999 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 18:24:37,000 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2019-12-07 18:24:37,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 18:24:37,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-12-07 18:24:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-07 18:24:37,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-12-07 18:24:37,004 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 44 [2019-12-07 18:24:37,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:37,004 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-12-07 18:24:37,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 18:24:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-12-07 18:24:37,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-12-07 18:24:37,005 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:37,005 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:37,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:37,206 INFO L410 AbstractCegarLoop]: === Iteration 20 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:37,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:37,206 INFO L82 PathProgramCache]: Analyzing trace with hash -319514926, now seen corresponding path program 6 times [2019-12-07 18:24:37,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:37,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039186184] [2019-12-07 18:24:37,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:37,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039186184] [2019-12-07 18:24:37,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478585982] [2019-12-07 18:24:37,363 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:37,391 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-12-07 18:24:37,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:24:37,392 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 18:24:37,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:37,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:37,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2019-12-07 18:24:37,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696584594] [2019-12-07 18:24:37,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 18:24:37,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:37,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 18:24:37,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2019-12-07 18:24:37,404 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 21 states. [2019-12-07 18:24:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:37,634 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-12-07 18:24:37,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 18:24:37,634 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2019-12-07 18:24:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:37,635 INFO L225 Difference]: With dead ends: 71 [2019-12-07 18:24:37,635 INFO L226 Difference]: Without dead ends: 70 [2019-12-07 18:24:37,636 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=1092, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 18:24:37,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-07 18:24:37,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-12-07 18:24:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-12-07 18:24:37,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-12-07 18:24:37,641 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 56 [2019-12-07 18:24:37,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:37,641 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-12-07 18:24:37,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 18:24:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-12-07 18:24:37,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-12-07 18:24:37,642 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:37,642 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:37,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:37,842 INFO L410 AbstractCegarLoop]: === Iteration 21 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:37,843 INFO L82 PathProgramCache]: Analyzing trace with hash 52526366, now seen corresponding path program 7 times [2019-12-07 18:24:37,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:37,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509163168] [2019-12-07 18:24:37,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:38,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509163168] [2019-12-07 18:24:38,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101523870] [2019-12-07 18:24:38,026 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:38,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 18:24:38,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:38,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:38,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2019-12-07 18:24:38,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869845293] [2019-12-07 18:24:38,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 18:24:38,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:38,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 18:24:38,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2019-12-07 18:24:38,065 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 25 states. [2019-12-07 18:24:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:38,362 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-12-07 18:24:38,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-07 18:24:38,363 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 68 [2019-12-07 18:24:38,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:38,363 INFO L225 Difference]: With dead ends: 83 [2019-12-07 18:24:38,363 INFO L226 Difference]: Without dead ends: 82 [2019-12-07 18:24:38,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=1611, Unknown=0, NotChecked=0, Total=2070 [2019-12-07 18:24:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-12-07 18:24:38,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-12-07 18:24:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-12-07 18:24:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-12-07 18:24:38,370 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 68 [2019-12-07 18:24:38,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:38,370 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-12-07 18:24:38,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 18:24:38,370 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-12-07 18:24:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-12-07 18:24:38,371 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:38,371 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:38,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:38,572 INFO L410 AbstractCegarLoop]: === Iteration 22 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:38,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1106554518, now seen corresponding path program 8 times [2019-12-07 18:24:38,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:38,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966946224] [2019-12-07 18:24:38,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:38,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966946224] [2019-12-07 18:24:38,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465531217] [2019-12-07 18:24:38,831 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:38,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:24:38,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:24:38,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 18:24:38,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:38,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:38,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2019-12-07 18:24:38,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055052432] [2019-12-07 18:24:38,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 18:24:38,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:38,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 18:24:38,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2019-12-07 18:24:38,879 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 29 states. [2019-12-07 18:24:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:39,266 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-12-07 18:24:39,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-07 18:24:39,267 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2019-12-07 18:24:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:39,267 INFO L225 Difference]: With dead ends: 95 [2019-12-07 18:24:39,267 INFO L226 Difference]: Without dead ends: 94 [2019-12-07 18:24:39,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=2230, Unknown=0, NotChecked=0, Total=2862 [2019-12-07 18:24:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-07 18:24:39,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-12-07 18:24:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-07 18:24:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-12-07 18:24:39,275 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 80 [2019-12-07 18:24:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:39,275 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-12-07 18:24:39,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 18:24:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-12-07 18:24:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-12-07 18:24:39,276 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:39,276 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:39,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:39,477 INFO L410 AbstractCegarLoop]: === Iteration 23 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:39,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:39,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1279454282, now seen corresponding path program 9 times [2019-12-07 18:24:39,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:39,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189161919] [2019-12-07 18:24:39,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:39,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189161919] [2019-12-07 18:24:39,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070529185] [2019-12-07 18:24:39,799 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:39,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-12-07 18:24:39,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:24:39,837 INFO L264 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 18:24:39,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 573 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:24:39,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:39,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 35 [2019-12-07 18:24:39,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753285128] [2019-12-07 18:24:39,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-07 18:24:39,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:39,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-07 18:24:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 18:24:39,904 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 36 states. [2019-12-07 18:24:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:40,452 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2019-12-07 18:24:40,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-07 18:24:40,453 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 92 [2019-12-07 18:24:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:40,453 INFO L225 Difference]: With dead ends: 119 [2019-12-07 18:24:40,454 INFO L226 Difference]: Without dead ends: 118 [2019-12-07 18:24:40,455 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1140, Invalid=3830, Unknown=0, NotChecked=0, Total=4970 [2019-12-07 18:24:40,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-12-07 18:24:40,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2019-12-07 18:24:40,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-07 18:24:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2019-12-07 18:24:40,463 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 92 [2019-12-07 18:24:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:40,464 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2019-12-07 18:24:40,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-07 18:24:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2019-12-07 18:24:40,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-12-07 18:24:40,464 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:24:40,465 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:24:40,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:40,665 INFO L410 AbstractCegarLoop]: === Iteration 24 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 18:24:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:24:40,666 INFO L82 PathProgramCache]: Analyzing trace with hash -853253554, now seen corresponding path program 10 times [2019-12-07 18:24:40,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:24:40,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955287059] [2019-12-07 18:24:40,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:24:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:24:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 0 proven. 955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:24:41,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955287059] [2019-12-07 18:24:41,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509248653] [2019-12-07 18:24:41,130 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:41,168 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:24:41,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:24:41,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 61 conjunts are in the unsatisfiable core [2019-12-07 18:24:41,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:24:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 10 proven. 682 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2019-12-07 18:24:41,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:24:41,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 15] total 51 [2019-12-07 18:24:41,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128064945] [2019-12-07 18:24:41,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-12-07 18:24:41,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:41,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-12-07 18:24:41,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=2221, Unknown=0, NotChecked=0, Total=2652 [2019-12-07 18:24:41,430 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 52 states. [2019-12-07 18:24:41,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:41,592 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2019-12-07 18:24:41,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 18:24:41,593 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 116 [2019-12-07 18:24:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:41,593 INFO L225 Difference]: With dead ends: 117 [2019-12-07 18:24:41,593 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 18:24:41,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=646, Invalid=2660, Unknown=0, NotChecked=0, Total=3306 [2019-12-07 18:24:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 18:24:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 18:24:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 18:24:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 18:24:41,595 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2019-12-07 18:24:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:41,595 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 18:24:41,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-12-07 18:24:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 18:24:41,595 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 18:24:41,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:41,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 18:24:42,271 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 116 [2019-12-07 18:24:42,386 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 97 [2019-12-07 18:24:44,309 WARN L192 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 33 [2019-12-07 18:24:44,756 WARN L192 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 1 [2019-12-07 18:24:47,534 WARN L192 SmtUtils]: Spent 2.76 s on a formula simplification. DAG size of input: 520 DAG size of output: 42 [2019-12-07 18:24:47,535 INFO L246 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2019-12-07 18:24:47,535 INFO L246 CegarLoopResult]: For program point fFINAL(lines 13 23) no Hoare annotation was computed. [2019-12-07 18:24:47,535 INFO L246 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2019-12-07 18:24:47,535 INFO L246 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2019-12-07 18:24:47,536 INFO L242 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (not (<= 0 |f_#in~x|))) (.cse1 (not (<= |f_#in~x| 2147483647)))) (and (or (not (<= 0 |f_#in~y|)) (not (<= |f_#in~y| 2147483647)) (and (not (= 0 f_~y)) (<= 0 f_~x) (<= f_~x 2147483647) (not (= 0 f_~x)) (<= f_~y 2147483647) (<= 0 f_~y)) .cse0 .cse1) (or (not (<= |f_#in~y| |f_#in~x|)) (= |f_#in~x| 0) (and (<= f_~y f_~x) (<= f_~x (+ f_~y 1))) .cse0 (not (<= |f_#in~x| (+ |f_#in~y| 1))) .cse1))) [2019-12-07 18:24:47,536 INFO L246 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2019-12-07 18:24:47,536 INFO L246 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2019-12-07 18:24:47,536 INFO L246 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2019-12-07 18:24:47,536 INFO L242 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse0 (not (<= 0 |f_#in~y|))) (.cse1 (not (<= |f_#in~y| 2147483647))) (.cse2 (not (<= |f_#in~x| 2147483647)))) (and (or .cse0 .cse1 (not (<= 1 |f_#in~x|)) .cse2) (or (and (not (= 0 f_~y)) (<= 0 f_~x) (<= f_~x (+ f_~y 1)) (<= f_~x 2147483646) (<= f_~y 2147483647) (<= 0 f_~y)) .cse0 .cse1 (not (<= 0 |f_#in~x|)) .cse2))) [2019-12-07 18:24:47,536 INFO L246 CegarLoopResult]: For program point L18-3(line 18) no Hoare annotation was computed. [2019-12-07 18:24:47,536 INFO L246 CegarLoopResult]: For program point L14(lines 14 22) no Hoare annotation was computed. [2019-12-07 18:24:47,536 INFO L246 CegarLoopResult]: For program point fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2019-12-07 18:24:47,536 INFO L246 CegarLoopResult]: For program point fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2019-12-07 18:24:47,536 INFO L246 CegarLoopResult]: For program point fEXIT(lines 13 23) no Hoare annotation was computed. [2019-12-07 18:24:47,536 INFO L249 CegarLoopResult]: At program point fENTRY(lines 13 23) the Hoare annotation is: true [2019-12-07 18:24:47,537 INFO L246 CegarLoopResult]: For program point fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2019-12-07 18:24:47,537 INFO L246 CegarLoopResult]: For program point fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2019-12-07 18:24:47,537 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 18:24:47,537 INFO L242 CegarLoopResult]: At program point L31(lines 25 32) the Hoare annotation is: (<= ULTIMATE.start_main_~y~0 2147483647) [2019-12-07 18:24:47,537 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 18:24:47,537 INFO L242 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= ULTIMATE.start_main_~y~0 2147483647) (<= 0 ULTIMATE.start_main_~x~0) (<= 0 ULTIMATE.start_main_~y~0)) [2019-12-07 18:24:47,537 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 18:24:47,537 INFO L246 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2019-12-07 18:24:47,537 INFO L246 CegarLoopResult]: For program point L29-1(line 29) no Hoare annotation was computed. [2019-12-07 18:24:47,537 INFO L246 CegarLoopResult]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2019-12-07 18:24:47,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:24:47 BoogieIcfgContainer [2019-12-07 18:24:47,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:24:47,547 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:24:47,547 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:24:47,547 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:24:47,547 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:24:30" (3/4) ... [2019-12-07 18:24:47,550 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 18:24:47,554 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure f [2019-12-07 18:24:47,557 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 18:24:47,557 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 18:24:47,582 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fac93e0b-723e-4e92-ab4d-b362ef6178a4/bin/uautomizer/witness.graphml [2019-12-07 18:24:47,582 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:24:47,583 INFO L168 Benchmark]: Toolchain (without parser) took 17491.21 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 281.5 MB). Free memory was 942.4 MB in the beginning and 1.0 GB in the end (delta: -70.2 MB). Peak memory consumption was 211.4 MB. Max. memory is 11.5 GB. [2019-12-07 18:24:47,583 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:24:47,583 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -162.0 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-12-07 18:24:47,584 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.07 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:24:47,584 INFO L168 Benchmark]: Boogie Preprocessor took 10.86 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:24:47,584 INFO L168 Benchmark]: RCFGBuilder took 146.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-12-07 18:24:47,584 INFO L168 Benchmark]: TraceAbstraction took 17108.77 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 174.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.2 MB). Peak memory consumption was 443.4 MB. Max. memory is 11.5 GB. [2019-12-07 18:24:47,584 INFO L168 Benchmark]: Witness Printer took 35.16 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:24:47,586 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 166.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -162.0 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.07 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.86 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 146.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 17108.77 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 174.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.2 MB). Peak memory consumption was 443.4 MB. Max. memory is 11.5 GB. * Witness Printer took 35.16 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: 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: 25]: Loop Invariant Derived loop invariant: y <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 4 error locations. Result: SAFE, OverallTime: 11.3s, OverallIterations: 24, TraceHistogramMax: 19, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.7s, HoareTripleCheckerStatistics: 286 SDtfs, 1294 SDslu, 1208 SDs, 0 SdLazy, 2569 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1258 GetRequests, 729 SyntacticMatches, 5 SemanticMatches, 524 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4132 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 24 MinimizatonAttempts, 261 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 89 PreInvPairs, 89 NumberOfFragments, 144 HoareAnnotationTreeSize, 89 FomulaSimplifications, 38139358 FormulaSimplificationTreeSizeReduction, 2.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 5999924 FormulaSimplificationTreeSizeReductionInter, 3.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 1553 NumberOfCodeBlocks, 1553 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 1510 ConstructedInterpolants, 0 QuantifiedInterpolants, 424429 SizeOfPredicates, 121 NumberOfNonLiveVariables, 1919 ConjunctsInSsa, 300 ConjunctsInUnsatCore, 43 InterpolantComputations, 7 PerfectInterpolantSequences, 364/5819 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...