./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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_6b988cca-756f-4276-b63e-bb6caced58e6/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 0.2.0-a4ecdab [2020-11-29 20:23:07,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:23:07,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:23:07,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:23:07,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:23:07,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:23:07,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:23:07,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:23:07,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:23:07,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:23:07,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:23:07,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:23:07,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:23:07,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:23:07,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:23:07,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:23:07,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:23:07,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:23:07,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:23:07,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:23:07,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:23:07,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:23:07,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:23:07,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:23:07,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:23:07,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:23:07,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:23:07,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:23:07,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:23:07,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:23:07,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:23:07,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:23:07,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:23:07,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:23:07,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:23:07,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:23:07,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:23:07,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:23:07,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:23:07,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:23:07,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:23:07,540 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-11-29 20:23:07,589 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:23:07,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:23:07,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:23:07,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:23:07,596 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:23:07,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:23:07,596 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 20:23:07,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:23:07,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:23:07,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:23:07,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:23:07,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:23:07,599 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-29 20:23:07,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:23:07,600 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:23:07,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:23:07,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:23:07,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:23:07,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:23:07,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:23:07,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:23:07,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:23:07,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:23:07,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:23:07,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:23:07,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:23:07,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:23:07,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:23:07,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 457415f9b28998cf0ba7f80d69eaf14873f5a98f [2020-11-29 20:23:07,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:23:07,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:23:07,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:23:07,980 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:23:07,981 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:23:07,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2020-11-29 20:23:08,096 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/bin/uautomizer/data/90a83b5b4/bcc5c97edd454258a00fb849f9f0bd52/FLAGe45a767d7 [2020-11-29 20:23:08,836 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:23:08,839 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2020-11-29 20:23:08,853 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/bin/uautomizer/data/90a83b5b4/bcc5c97edd454258a00fb849f9f0bd52/FLAGe45a767d7 [2020-11-29 20:23:09,208 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/bin/uautomizer/data/90a83b5b4/bcc5c97edd454258a00fb849f9f0bd52 [2020-11-29 20:23:09,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:23:09,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:23:09,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:23:09,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:23:09,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:23:09,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:23:09" (1/1) ... [2020-11-29 20:23:09,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16033aef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:23:09, skipping insertion in model container [2020-11-29 20:23:09,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:23:09" (1/1) ... [2020-11-29 20:23:09,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:23:09,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:23:09,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:23:09,479 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:23:09,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:23:09,541 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:23:09,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:23:09 WrapperNode [2020-11-29 20:23:09,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:23:09,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:23:09,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:23:09,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:23:09,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:23:09" (1/1) ... [2020-11-29 20:23:09,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:23:09" (1/1) ... [2020-11-29 20:23:09,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:23:09,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:23:09,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:23:09,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:23:09,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:23:09" (1/1) ... [2020-11-29 20:23:09,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:23:09" (1/1) ... [2020-11-29 20:23:09,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:23:09" (1/1) ... [2020-11-29 20:23:09,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:23:09" (1/1) ... [2020-11-29 20:23:09,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:23:09" (1/1) ... [2020-11-29 20:23:09,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:23:09" (1/1) ... [2020-11-29 20:23:09,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:23:09" (1/1) ... [2020-11-29 20:23:09,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:23:09,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:23:09,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:23:09,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:23:09,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:23:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:09,692 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-11-29 20:23:09,693 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-11-29 20:23:09,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:23:09,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:23:10,079 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:23:10,080 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-29 20:23:10,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:23:10 BoogieIcfgContainer [2020-11-29 20:23:10,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:23:10,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:23:10,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:23:10,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:23:10,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:23:09" (1/3) ... [2020-11-29 20:23:10,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148faa1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:23:10, skipping insertion in model container [2020-11-29 20:23:10,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:23:09" (2/3) ... [2020-11-29 20:23:10,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148faa1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:23:10, skipping insertion in model container [2020-11-29 20:23:10,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:23:10" (3/3) ... [2020-11-29 20:23:10,098 INFO L111 eAbstractionObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex5.c [2020-11-29 20:23:10,112 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:23:10,117 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-29 20:23:10,131 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-29 20:23:10,172 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:23:10,173 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:23:10,173 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:23:10,174 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:23:10,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:23:10,174 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:23:10,175 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:23:10,175 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:23:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-29 20:23:10,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-29 20:23:10,209 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:10,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:10,211 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:10,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1461861353, now seen corresponding path program 1 times [2020-11-29 20:23:10,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:10,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557782396] [2020-11-29 20:23:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:10,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557782396] [2020-11-29 20:23:10,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:23:10,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:23:10,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147044757] [2020-11-29 20:23:10,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:23:10,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:10,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:23:10,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:23:10,543 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-11-29 20:23:10,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:10,747 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-11-29 20:23:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:23:10,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-29 20:23:10,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:10,770 INFO L225 Difference]: With dead ends: 44 [2020-11-29 20:23:10,771 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 20:23:10,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:23:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 20:23:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-11-29 20:23:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 20:23:10,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-29 20:23:10,835 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2020-11-29 20:23:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:10,836 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-29 20:23:10,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:23:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-29 20:23:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-29 20:23:10,837 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:10,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:10,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:23:10,838 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:10,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:10,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1461861577, now seen corresponding path program 1 times [2020-11-29 20:23:10,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:10,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89444982] [2020-11-29 20:23:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:10,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89444982] [2020-11-29 20:23:10,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:23:10,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:23:10,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035431653] [2020-11-29 20:23:10,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:23:10,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:10,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:23:10,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:23:10,902 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-11-29 20:23:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:10,977 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-11-29 20:23:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:23:10,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-29 20:23:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:10,979 INFO L225 Difference]: With dead ends: 34 [2020-11-29 20:23:10,979 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 20:23:10,980 INFO L677 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 [2020-11-29 20:23:10,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 20:23:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-11-29 20:23:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 20:23:10,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-11-29 20:23:10,989 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 7 [2020-11-29 20:23:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:10,990 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-11-29 20:23:10,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:23:10,990 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-11-29 20:23:10,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 20:23:10,991 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:10,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:10,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 20:23:10,992 INFO L429 AbstractCegarLoop]: === Iteration 3 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:10,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:10,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1926938272, now seen corresponding path program 1 times [2020-11-29 20:23:10,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:10,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54563957] [2020-11-29 20:23:10,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:11,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54563957] [2020-11-29 20:23:11,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:23:11,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:23:11,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879951725] [2020-11-29 20:23:11,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:23:11,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:11,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:23:11,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:23:11,052 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-11-29 20:23:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:11,117 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-11-29 20:23:11,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:23:11,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-29 20:23:11,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:11,120 INFO L225 Difference]: With dead ends: 33 [2020-11-29 20:23:11,120 INFO L226 Difference]: Without dead ends: 32 [2020-11-29 20:23:11,121 INFO L677 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 [2020-11-29 20:23:11,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-29 20:23:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-11-29 20:23:11,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 20:23:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-11-29 20:23:11,137 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2020-11-29 20:23:11,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:11,142 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-11-29 20:23:11,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:23:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-11-29 20:23:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 20:23:11,143 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:11,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:11,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 20:23:11,144 INFO L429 AbstractCegarLoop]: === Iteration 4 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:11,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1926931321, now seen corresponding path program 1 times [2020-11-29 20:23:11,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:11,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142568287] [2020-11-29 20:23:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:11,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142568287] [2020-11-29 20:23:11,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:23:11,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:23:11,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798493837] [2020-11-29 20:23:11,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:23:11,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:11,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:23:11,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:23:11,205 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-11-29 20:23:11,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:11,285 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-11-29 20:23:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:23:11,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-29 20:23:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:11,287 INFO L225 Difference]: With dead ends: 32 [2020-11-29 20:23:11,288 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 20:23:11,288 INFO L677 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 [2020-11-29 20:23:11,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 20:23:11,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-11-29 20:23:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 20:23:11,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-11-29 20:23:11,299 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2020-11-29 20:23:11,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:11,299 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-11-29 20:23:11,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:23:11,300 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-11-29 20:23:11,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 20:23:11,302 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:11,302 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:11,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 20:23:11,303 INFO L429 AbstractCegarLoop]: === Iteration 5 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:11,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1954337320, now seen corresponding path program 1 times [2020-11-29 20:23:11,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:11,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077695773] [2020-11-29 20:23:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:11,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077695773] [2020-11-29 20:23:11,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909860481] [2020-11-29 20:23:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:11,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 20:23:11,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:11,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:23:11,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2020-11-29 20:23:11,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757387077] [2020-11-29 20:23:11,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:23:11,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:11,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:23:11,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:23:11,651 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2020-11-29 20:23:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:11,799 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-11-29 20:23:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:23:11,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-29 20:23:11,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:11,804 INFO L225 Difference]: With dead ends: 43 [2020-11-29 20:23:11,804 INFO L226 Difference]: Without dead ends: 42 [2020-11-29 20:23:11,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:23:11,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-29 20:23:11,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-11-29 20:23:11,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-29 20:23:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-11-29 20:23:11,820 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 13 [2020-11-29 20:23:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:11,820 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-11-29 20:23:11,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:23:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-11-29 20:23:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 20:23:11,822 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:11,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:12,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:23:12,048 INFO L429 AbstractCegarLoop]: === Iteration 6 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:12,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:12,049 INFO L82 PathProgramCache]: Analyzing trace with hash -906050173, now seen corresponding path program 1 times [2020-11-29 20:23:12,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:12,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340777145] [2020-11-29 20:23:12,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:12,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340777145] [2020-11-29 20:23:12,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796262219] [2020-11-29 20:23:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:12,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:23:12,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:12,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:12,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-29 20:23:12,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786737291] [2020-11-29 20:23:12,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:23:12,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:12,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:23:12,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:23:12,256 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2020-11-29 20:23:12,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:12,808 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-11-29 20:23:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:23:12,809 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-11-29 20:23:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:12,811 INFO L225 Difference]: With dead ends: 75 [2020-11-29 20:23:12,811 INFO L226 Difference]: Without dead ends: 73 [2020-11-29 20:23:12,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:23:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-29 20:23:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-11-29 20:23:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-29 20:23:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2020-11-29 20:23:12,835 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 13 [2020-11-29 20:23:12,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:12,839 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2020-11-29 20:23:12,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:23:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2020-11-29 20:23:12,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 20:23:12,840 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:12,840 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:13,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:23:13,041 INFO L429 AbstractCegarLoop]: === Iteration 7 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:13,042 INFO L82 PathProgramCache]: Analyzing trace with hash -906049949, now seen corresponding path program 1 times [2020-11-29 20:23:13,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:13,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370801638] [2020-11-29 20:23:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:13,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370801638] [2020-11-29 20:23:13,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329322613] [2020-11-29 20:23:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:13,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:23:13,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:13,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:13,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-29 20:23:13,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143225964] [2020-11-29 20:23:13,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:23:13,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:13,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:23:13,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:23:13,228 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 7 states. [2020-11-29 20:23:13,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:13,492 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-11-29 20:23:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:23:13,493 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-11-29 20:23:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:13,494 INFO L225 Difference]: With dead ends: 67 [2020-11-29 20:23:13,495 INFO L226 Difference]: Without dead ends: 65 [2020-11-29 20:23:13,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:23:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-29 20:23:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 21. [2020-11-29 20:23:13,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-29 20:23:13,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-11-29 20:23:13,501 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2020-11-29 20:23:13,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:13,502 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-11-29 20:23:13,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:23:13,502 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-11-29 20:23:13,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:23:13,503 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:13,503 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:13,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:23:13,704 INFO L429 AbstractCegarLoop]: === Iteration 8 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:13,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:13,705 INFO L82 PathProgramCache]: Analyzing trace with hash 454907873, now seen corresponding path program 1 times [2020-11-29 20:23:13,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:13,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957807961] [2020-11-29 20:23:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:13,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957807961] [2020-11-29 20:23:13,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642387153] [2020-11-29 20:23:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:13,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:23:13,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:13,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:13,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 20:23:13,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132151463] [2020-11-29 20:23:13,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:23:13,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:13,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:23:13,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:23:13,839 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2020-11-29 20:23:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:13,943 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-11-29 20:23:13,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:23:13,947 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-29 20:23:13,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:13,948 INFO L225 Difference]: With dead ends: 34 [2020-11-29 20:23:13,948 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 20:23:13,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:23:13,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 20:23:13,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-11-29 20:23:13,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 20:23:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-29 20:23:13,955 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 14 [2020-11-29 20:23:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:13,955 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-29 20:23:13,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:23:13,956 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-29 20:23:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:23:13,957 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:13,957 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:14,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:23:14,158 INFO L429 AbstractCegarLoop]: === Iteration 9 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:14,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:14,159 INFO L82 PathProgramCache]: Analyzing trace with hash 454914824, now seen corresponding path program 1 times [2020-11-29 20:23:14,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:14,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329249282] [2020-11-29 20:23:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:14,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329249282] [2020-11-29 20:23:14,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139103123] [2020-11-29 20:23:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:14,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 20:23:14,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:14,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:23:14,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2020-11-29 20:23:14,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136856269] [2020-11-29 20:23:14,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:23:14,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:14,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:23:14,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:23:14,372 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-11-29 20:23:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:14,476 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-11-29 20:23:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:23:14,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-29 20:23:14,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:14,477 INFO L225 Difference]: With dead ends: 38 [2020-11-29 20:23:14,477 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 20:23:14,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:23:14,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 20:23:14,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-11-29 20:23:14,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 20:23:14,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-11-29 20:23:14,485 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 14 [2020-11-29 20:23:14,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:14,485 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-11-29 20:23:14,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:23:14,485 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-11-29 20:23:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:23:14,486 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:14,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:14,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:23:14,687 INFO L429 AbstractCegarLoop]: === Iteration 10 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:14,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:14,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1977215750, now seen corresponding path program 1 times [2020-11-29 20:23:14,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:14,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353171608] [2020-11-29 20:23:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:14,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353171608] [2020-11-29 20:23:14,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951984388] [2020-11-29 20:23:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 20:23:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:23:14,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:23:14,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:14,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:14,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 20:23:14,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423150259] [2020-11-29 20:23:14,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:23:14,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:14,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:23:14,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:23:14,892 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-11-29 20:23:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:15,060 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-11-29 20:23:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:23:15,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-29 20:23:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:15,062 INFO L225 Difference]: With dead ends: 44 [2020-11-29 20:23:15,062 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 20:23:15,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:23:15,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 20:23:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-11-29 20:23:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 20:23:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-11-29 20:23:15,084 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 14 [2020-11-29 20:23:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:15,084 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-11-29 20:23:15,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:23:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-11-29 20:23:15,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:23:15,088 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:15,088 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:15,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:23:15,308 INFO L429 AbstractCegarLoop]: === Iteration 11 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:15,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:15,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1977222701, now seen corresponding path program 1 times [2020-11-29 20:23:15,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:15,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199508265] [2020-11-29 20:23:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:15,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199508265] [2020-11-29 20:23:15,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249794075] [2020-11-29 20:23:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:23:15,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:15,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:15,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 20:23:15,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568065792] [2020-11-29 20:23:15,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:23:15,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:15,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:23:15,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:23:15,464 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 7 states. [2020-11-29 20:23:15,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:15,620 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-11-29 20:23:15,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:23:15,621 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-29 20:23:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:15,622 INFO L225 Difference]: With dead ends: 43 [2020-11-29 20:23:15,622 INFO L226 Difference]: Without dead ends: 42 [2020-11-29 20:23:15,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:23:15,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-29 20:23:15,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-11-29 20:23:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-29 20:23:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-11-29 20:23:15,635 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2020-11-29 20:23:15,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:15,635 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-11-29 20:23:15,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:23:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-11-29 20:23:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:23:15,641 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:15,641 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-11-29 20:23:15,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:23:15,842 INFO L429 AbstractCegarLoop]: === Iteration 12 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:15,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:15,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1070544478, now seen corresponding path program 2 times [2020-11-29 20:23:15,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:15,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919486385] [2020-11-29 20:23:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:15,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919486385] [2020-11-29 20:23:15,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267707776] [2020-11-29 20:23:15,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:15,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:23:15,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:23:15,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:23:15,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:16,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:16,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2020-11-29 20:23:16,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893688598] [2020-11-29 20:23:16,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 20:23:16,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:16,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 20:23:16,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:23:16,150 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 14 states. [2020-11-29 20:23:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:17,170 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2020-11-29 20:23:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-29 20:23:17,172 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-11-29 20:23:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:17,173 INFO L225 Difference]: With dead ends: 120 [2020-11-29 20:23:17,173 INFO L226 Difference]: Without dead ends: 104 [2020-11-29 20:23:17,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 20:23:17,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-29 20:23:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2020-11-29 20:23:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 20:23:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-11-29 20:23:17,203 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 20 [2020-11-29 20:23:17,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:17,204 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-11-29 20:23:17,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 20:23:17,205 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-11-29 20:23:17,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:23:17,206 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:17,206 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:17,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-29 20:23:17,423 INFO L429 AbstractCegarLoop]: === Iteration 13 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:17,424 INFO L82 PathProgramCache]: Analyzing trace with hash 451770350, now seen corresponding path program 1 times [2020-11-29 20:23:17,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:17,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886091484] [2020-11-29 20:23:17,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:17,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886091484] [2020-11-29 20:23:17,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736201869] [2020-11-29 20:23:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:17,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:23:17,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:17,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:17,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 20:23:17,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981268161] [2020-11-29 20:23:17,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:23:17,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:17,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:23:17,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:23:17,590 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 9 states. [2020-11-29 20:23:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:17,817 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-11-29 20:23:17,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:23:17,818 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-11-29 20:23:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:17,820 INFO L225 Difference]: With dead ends: 86 [2020-11-29 20:23:17,821 INFO L226 Difference]: Without dead ends: 85 [2020-11-29 20:23:17,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:23:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-29 20:23:17,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2020-11-29 20:23:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 20:23:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-11-29 20:23:17,841 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 20 [2020-11-29 20:23:17,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:17,842 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-11-29 20:23:17,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:23:17,842 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-11-29 20:23:17,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:23:17,845 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:17,846 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:18,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:23:18,060 INFO L429 AbstractCegarLoop]: === Iteration 14 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:18,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:18,060 INFO L82 PathProgramCache]: Analyzing trace with hash -147215097, now seen corresponding path program 1 times [2020-11-29 20:23:18,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:18,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782947132] [2020-11-29 20:23:18,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 20:23:18,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782947132] [2020-11-29 20:23:18,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:23:18,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:23:18,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170944925] [2020-11-29 20:23:18,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:23:18,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:18,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:23:18,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:23:18,116 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 5 states. [2020-11-29 20:23:18,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:18,225 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-11-29 20:23:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:23:18,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-11-29 20:23:18,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:18,227 INFO L225 Difference]: With dead ends: 72 [2020-11-29 20:23:18,227 INFO L226 Difference]: Without dead ends: 71 [2020-11-29 20:23:18,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:23:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-29 20:23:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-11-29 20:23:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-29 20:23:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-11-29 20:23:18,255 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 20 [2020-11-29 20:23:18,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:18,255 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-11-29 20:23:18,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:23:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-11-29 20:23:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:23:18,258 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:18,259 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:18,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-29 20:23:18,259 INFO L429 AbstractCegarLoop]: === Iteration 15 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:18,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:18,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1375092780, now seen corresponding path program 2 times [2020-11-29 20:23:18,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:18,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984971105] [2020-11-29 20:23:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:18,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984971105] [2020-11-29 20:23:18,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559128667] [2020-11-29 20:23:18,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:18,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:23:18,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:23:18,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:23:18,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:18,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:18,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 20:23:18,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756412506] [2020-11-29 20:23:18,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:23:18,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:18,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:23:18,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:23:18,446 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 9 states. [2020-11-29 20:23:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:18,753 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2020-11-29 20:23:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 20:23:18,754 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-11-29 20:23:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:18,755 INFO L225 Difference]: With dead ends: 88 [2020-11-29 20:23:18,755 INFO L226 Difference]: Without dead ends: 87 [2020-11-29 20:23:18,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:23:18,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-29 20:23:18,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 66. [2020-11-29 20:23:18,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-29 20:23:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-11-29 20:23:18,778 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 20 [2020-11-29 20:23:18,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:18,779 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-11-29 20:23:18,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:23:18,779 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-11-29 20:23:18,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:23:18,780 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:18,780 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-11-29 20:23:18,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 20:23:18,996 INFO L429 AbstractCegarLoop]: === Iteration 16 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:18,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:18,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1375099731, now seen corresponding path program 2 times [2020-11-29 20:23:18,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:18,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890252209] [2020-11-29 20:23:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:19,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890252209] [2020-11-29 20:23:19,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368728861] [2020-11-29 20:23:19,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:19,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:23:19,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:23:19,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:23:19,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:19,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:19,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 20:23:19,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467533770] [2020-11-29 20:23:19,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:23:19,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:19,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:23:19,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:23:19,222 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 9 states. [2020-11-29 20:23:19,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:19,470 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2020-11-29 20:23:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 20:23:19,471 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-11-29 20:23:19,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:19,472 INFO L225 Difference]: With dead ends: 90 [2020-11-29 20:23:19,472 INFO L226 Difference]: Without dead ends: 89 [2020-11-29 20:23:19,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:23:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-29 20:23:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2020-11-29 20:23:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 20:23:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2020-11-29 20:23:19,489 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 20 [2020-11-29 20:23:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:19,490 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2020-11-29 20:23:19,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:23:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2020-11-29 20:23:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 20:23:19,491 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:19,492 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:19,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 20:23:19,712 INFO L429 AbstractCegarLoop]: === Iteration 17 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:19,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:19,712 INFO L82 PathProgramCache]: Analyzing trace with hash -411380497, now seen corresponding path program 2 times [2020-11-29 20:23:19,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:19,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185404820] [2020-11-29 20:23:19,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:19,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185404820] [2020-11-29 20:23:19,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950911346] [2020-11-29 20:23:19,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:19,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:23:19,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:23:19,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:23:19,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:19,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:19,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2020-11-29 20:23:19,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284288366] [2020-11-29 20:23:19,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 20:23:19,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:19,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 20:23:19,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:23:19,985 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 13 states. [2020-11-29 20:23:20,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:20,450 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-11-29 20:23:20,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 20:23:20,450 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-11-29 20:23:20,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:20,452 INFO L225 Difference]: With dead ends: 87 [2020-11-29 20:23:20,452 INFO L226 Difference]: Without dead ends: 86 [2020-11-29 20:23:20,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:23:20,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-29 20:23:20,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2020-11-29 20:23:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 20:23:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2020-11-29 20:23:20,480 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 26 [2020-11-29 20:23:20,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:20,481 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2020-11-29 20:23:20,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 20:23:20,481 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2020-11-29 20:23:20,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 20:23:20,487 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:20,487 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:20,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 20:23:20,700 INFO L429 AbstractCegarLoop]: === Iteration 18 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:20,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:20,701 INFO L82 PathProgramCache]: Analyzing trace with hash 511941933, now seen corresponding path program 2 times [2020-11-29 20:23:20,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:20,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661832117] [2020-11-29 20:23:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 20:23:20,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661832117] [2020-11-29 20:23:20,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983541021] [2020-11-29 20:23:20,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:20,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:23:20,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:23:20,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 20:23:20,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 20:23:20,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:20,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 20:23:20,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639058726] [2020-11-29 20:23:20,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:23:20,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:20,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:23:20,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:23:20,924 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 7 states. [2020-11-29 20:23:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:21,057 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2020-11-29 20:23:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:23:21,058 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-11-29 20:23:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:21,059 INFO L225 Difference]: With dead ends: 87 [2020-11-29 20:23:21,059 INFO L226 Difference]: Without dead ends: 86 [2020-11-29 20:23:21,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:23:21,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-29 20:23:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2020-11-29 20:23:21,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 20:23:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-11-29 20:23:21,074 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 26 [2020-11-29 20:23:21,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:21,075 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-11-29 20:23:21,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:23:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-11-29 20:23:21,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 20:23:21,076 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:21,076 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:21,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 20:23:21,304 INFO L429 AbstractCegarLoop]: === Iteration 19 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:21,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:21,304 INFO L82 PathProgramCache]: Analyzing trace with hash 511948884, now seen corresponding path program 3 times [2020-11-29 20:23:21,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:21,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962847111] [2020-11-29 20:23:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:21,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962847111] [2020-11-29 20:23:21,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415644585] [2020-11-29 20:23:21,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:21,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 20:23:21,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:23:21,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:23:21,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:21,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:21,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 20:23:21,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945860608] [2020-11-29 20:23:21,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 20:23:21,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:21,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 20:23:21,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:23:21,522 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 11 states. [2020-11-29 20:23:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:21,901 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2020-11-29 20:23:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 20:23:21,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-11-29 20:23:21,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:21,903 INFO L225 Difference]: With dead ends: 117 [2020-11-29 20:23:21,903 INFO L226 Difference]: Without dead ends: 116 [2020-11-29 20:23:21,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-29 20:23:21,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-29 20:23:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2020-11-29 20:23:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-29 20:23:21,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2020-11-29 20:23:21,920 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 26 [2020-11-29 20:23:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:21,922 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2020-11-29 20:23:21,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 20:23:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2020-11-29 20:23:21,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 20:23:21,924 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:21,924 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:22,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:23:22,148 INFO L429 AbstractCegarLoop]: === Iteration 20 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:23:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:22,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1109206892, now seen corresponding path program 4 times [2020-11-29 20:23:22,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:22,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445587746] [2020-11-29 20:23:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:22,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445587746] [2020-11-29 20:23:22,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976110075] [2020-11-29 20:23:22,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/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 [2020-11-29 20:23:22,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:23:22,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:23:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:23:22,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 20:23:22,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:22,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2020-11-29 20:23:22,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797044235] [2020-11-29 20:23:22,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 20:23:22,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:22,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 20:23:22,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-11-29 20:23:22,484 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 17 states. [2020-11-29 20:23:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:22,768 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2020-11-29 20:23:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 20:23:22,776 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-11-29 20:23:22,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:22,776 INFO L225 Difference]: With dead ends: 88 [2020-11-29 20:23:22,777 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 20:23:22,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-11-29 20:23:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 20:23:22,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 20:23:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 20:23:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 20:23:22,780 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-11-29 20:23:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:22,781 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 20:23:22,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 20:23:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 20:23:22,781 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 20:23:23,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:23:23,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 20:23:23,111 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-11-29 20:23:23,405 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-11-29 20:23:23,583 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-11-29 20:23:23,778 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-11-29 20:23:23,964 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-11-29 20:23:24,183 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-11-29 20:23:24,323 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-11-29 20:23:24,805 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 31 [2020-11-29 20:23:24,952 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 1 [2020-11-29 20:23:27,076 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 201 DAG size of output: 42 [2020-11-29 20:23:27,079 INFO L274 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-11-29 20:23:27,080 INFO L274 CegarLoopResult]: For program point fFINAL(lines 13 23) no Hoare annotation was computed. [2020-11-29 20:23:27,080 INFO L274 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-11-29 20:23:27,080 INFO L274 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-11-29 20:23:27,081 INFO L270 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse5 (+ |f_#in~y| 1))) (let ((.cse0 (not (<= |f_#in~y| 2147483647))) (.cse3 (not (<= |f_#in~x| .cse5))) (.cse4 (+ f_~y 1)) (.cse1 (not (<= |f_#in~x| 2147483647))) (.cse2 (not (<= 0 |f_#in~y|)))) (and (or (and (not (= f_~y 0)) (<= f_~x 2147483647) (<= 0 f_~y) (< 0 f_~x) (<= f_~y 2147483647)) .cse0 (not (<= 0 |f_#in~x|)) .cse1 .cse2) (or (not (<= |f_#in~y| |f_#in~x|)) (not (< 0 |f_#in~x|)) .cse0 .cse3 (and (<= f_~y f_~x) (<= f_~x .cse4)) .cse1) (or .cse0 .cse3 (<= .cse4 f_~x) (not (<= .cse5 |f_#in~x|)) .cse1 .cse2)))) [2020-11-29 20:23:27,081 INFO L274 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-11-29 20:23:27,081 INFO L274 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-11-29 20:23:27,081 INFO L274 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-11-29 20:23:27,082 INFO L270 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse0 (not (<= |f_#in~y| 2147483647))) (.cse1 (not (<= |f_#in~x| 2147483647))) (.cse2 (not (<= 0 |f_#in~y|)))) (and (or .cse0 (not (<= 0 |f_#in~x|)) .cse1 .cse2 (and (not (= f_~y 0)) (<= f_~x 2147483647) (<= 0 f_~y) (<= f_~y 2147483647) (<= 0 f_~x) (<= f_~x (+ f_~y 1)))) (or (not (< 0 |f_#in~x|)) .cse0 .cse1 .cse2))) [2020-11-29 20:23:27,082 INFO L274 CegarLoopResult]: For program point L18-3(line 18) no Hoare annotation was computed. [2020-11-29 20:23:27,082 INFO L274 CegarLoopResult]: For program point L14(lines 14 22) no Hoare annotation was computed. [2020-11-29 20:23:27,082 INFO L274 CegarLoopResult]: For program point fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-29 20:23:27,083 INFO L274 CegarLoopResult]: For program point fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2020-11-29 20:23:27,083 INFO L274 CegarLoopResult]: For program point fEXIT(lines 13 23) no Hoare annotation was computed. [2020-11-29 20:23:27,083 INFO L277 CegarLoopResult]: At program point fENTRY(lines 13 23) the Hoare annotation is: true [2020-11-29 20:23:27,083 INFO L274 CegarLoopResult]: For program point fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2020-11-29 20:23:27,083 INFO L274 CegarLoopResult]: For program point fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-29 20:23:27,083 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 20:23:27,084 INFO L270 CegarLoopResult]: At program point L31(lines 25 32) the Hoare annotation is: (<= ULTIMATE.start_main_~y~0 2147483647) [2020-11-29 20:23:27,084 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 20:23:27,084 INFO L270 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 ULTIMATE.start_main_~y~0) (<= 0 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 2147483647)) [2020-11-29 20:23:27,084 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 20:23:27,084 INFO L274 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-11-29 20:23:27,084 INFO L274 CegarLoopResult]: For program point L29-1(line 29) no Hoare annotation was computed. [2020-11-29 20:23:27,084 INFO L274 CegarLoopResult]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2020-11-29 20:23:27,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:23:27 BoogieIcfgContainer [2020-11-29 20:23:27,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:23:27,109 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:23:27,109 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:23:27,112 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:23:27,113 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:23:10" (3/4) ... [2020-11-29 20:23:27,116 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 20:23:27,122 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure f [2020-11-29 20:23:27,127 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-29 20:23:27,128 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-29 20:23:27,171 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6b988cca-756f-4276-b63e-bb6caced58e6/bin/uautomizer/witness.graphml [2020-11-29 20:23:27,174 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:23:27,176 INFO L168 Benchmark]: Toolchain (without parser) took 17959.40 ms. Allocated memory was 90.2 MB in the beginning and 159.4 MB in the end (delta: 69.2 MB). Free memory was 57.3 MB in the beginning and 48.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 79.5 MB. Max. memory is 16.1 GB. [2020-11-29 20:23:27,179 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 90.2 MB. Free memory was 64.6 MB in the beginning and 64.6 MB in the end (delta: 30.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:23:27,179 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.83 ms. Allocated memory is still 90.2 MB. Free memory was 57.1 MB in the beginning and 69.4 MB in the end (delta: -12.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:23:27,180 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.40 ms. Allocated memory is still 90.2 MB. Free memory was 69.4 MB in the beginning and 68.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:23:27,181 INFO L168 Benchmark]: Boogie Preprocessor took 21.86 ms. Allocated memory is still 90.2 MB. Free memory was 68.2 MB in the beginning and 67.5 MB in the end (delta: 727.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:23:27,181 INFO L168 Benchmark]: RCFGBuilder took 480.16 ms. Allocated memory is still 90.2 MB. Free memory was 67.2 MB in the beginning and 57.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 20:23:27,182 INFO L168 Benchmark]: TraceAbstraction took 17022.97 ms. Allocated memory was 90.2 MB in the beginning and 159.4 MB in the end (delta: 69.2 MB). Free memory was 56.7 MB in the beginning and 51.2 MB in the end (delta: 5.5 MB). Peak memory consumption was 86.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:23:27,183 INFO L168 Benchmark]: Witness Printer took 65.68 ms. Allocated memory is still 159.4 MB. Free memory was 51.2 MB in the beginning and 48.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 20:23:27,185 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 90.2 MB. Free memory was 64.6 MB in the beginning and 64.6 MB in the end (delta: 30.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.83 ms. Allocated memory is still 90.2 MB. Free memory was 57.1 MB in the beginning and 69.4 MB in the end (delta: -12.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.40 ms. Allocated memory is still 90.2 MB. Free memory was 69.4 MB in the beginning and 68.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.86 ms. Allocated memory is still 90.2 MB. Free memory was 68.2 MB in the beginning and 67.5 MB in the end (delta: 727.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 480.16 ms. Allocated memory is still 90.2 MB. Free memory was 67.2 MB in the beginning and 57.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17022.97 ms. Allocated memory was 90.2 MB in the beginning and 159.4 MB in the end (delta: 69.2 MB). Free memory was 56.7 MB in the beginning and 51.2 MB in the end (delta: 5.5 MB). Peak memory consumption was 86.4 MB. Max. memory is 16.1 GB. * Witness Printer took 65.68 ms. Allocated memory is still 159.4 MB. Free memory was 51.2 MB in the beginning and 48.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 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. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.8s, OverallIterations: 20, TraceHistogramMax: 4, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 289 SDtfs, 916 SDslu, 763 SDs, 0 SdLazy, 1509 SolverSat, 97 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 510 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 284 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 47 PreInvPairs, 47 NumberOfFragments, 171 HoareAnnotationTreeSize, 47 FomulaSimplifications, 2746796 FormulaSimplificationTreeSizeReduction, 1.3s HoareSimplificationTime, 5 FomulaSimplificationsInter, 1604646 FormulaSimplificationTreeSizeReductionInter, 2.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 608 NumberOfCodeBlocks, 599 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 573 ConstructedInterpolants, 0 QuantifiedInterpolants, 36969 SizeOfPredicates, 42 NumberOfNonLiveVariables, 766 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 35 InterpolantComputations, 7 PerfectInterpolantSequences, 92/365 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...