./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/id_b3_o5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b3_o5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/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 32bit --witnessprinter.graph.data.programhash 849d3022dabab2c0a7f0738e4a7087eca0185d61 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:19:03,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:19:03,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:19:03,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:19:03,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:19:03,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:19:03,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:19:03,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:19:03,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:19:03,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:19:03,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:19:03,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:19:03,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:19:03,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:19:03,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:19:03,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:19:03,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:19:03,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:19:03,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:19:03,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:19:03,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:19:04,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:19:04,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:19:04,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:19:04,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:19:04,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:19:04,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:19:04,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:19:04,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:19:04,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:19:04,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:19:04,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:19:04,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:19:04,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:19:04,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:19:04,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:19:04,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:19:04,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:19:04,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:19:04,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:19:04,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:19:04,060 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf [2020-11-28 03:19:04,114 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:19:04,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:19:04,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:19:04,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:19:04,117 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:19:04,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:19:04,118 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:19:04,118 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:19:04,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:19:04,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:19:04,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:19:04,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:19:04,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:19:04,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:19:04,121 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-28 03:19:04,121 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:19:04,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:19:04,122 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:19:04,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:19:04,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:19:04,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:19:04,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:19:04,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:19:04,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:19:04,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:19:04,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:19:04,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:19:04,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:19:04,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:19:04,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:19:04,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:19:04,125 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_e5e97b97-46b6-4269-95b9-a50589c8d318/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 849d3022dabab2c0a7f0738e4a7087eca0185d61 [2020-11-28 03:19:04,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:19:04,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:19:04,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:19:04,433 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:19:04,434 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:19:04,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_b3_o5-2.c [2020-11-28 03:19:04,498 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/bin/uautomizer/data/09016f022/af051a7f7bc24e09b798b5a3177f0d14/FLAGc3b21363c [2020-11-28 03:19:05,010 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:19:05,011 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/sv-benchmarks/c/recursive-simple/id_b3_o5-2.c [2020-11-28 03:19:05,016 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/bin/uautomizer/data/09016f022/af051a7f7bc24e09b798b5a3177f0d14/FLAGc3b21363c [2020-11-28 03:19:05,387 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/bin/uautomizer/data/09016f022/af051a7f7bc24e09b798b5a3177f0d14 [2020-11-28 03:19:05,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:19:05,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:19:05,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:19:05,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:19:05,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:19:05,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:19:05" (1/1) ... [2020-11-28 03:19:05,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@430c628c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:05, skipping insertion in model container [2020-11-28 03:19:05,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:19:05" (1/1) ... [2020-11-28 03:19:05,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:19:05,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:19:05,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:19:05,634 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:19:05,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:19:05,665 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:19:05,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:05 WrapperNode [2020-11-28 03:19:05,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:19:05,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:19:05,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:19:05,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:19:05,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:05" (1/1) ... [2020-11-28 03:19:05,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:05" (1/1) ... [2020-11-28 03:19:05,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:19:05,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:19:05,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:19:05,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:19:05,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:05" (1/1) ... [2020-11-28 03:19:05,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:05" (1/1) ... [2020-11-28 03:19:05,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:05" (1/1) ... [2020-11-28 03:19:05,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:05" (1/1) ... [2020-11-28 03:19:05,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:05" (1/1) ... [2020-11-28 03:19:05,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:05" (1/1) ... [2020-11-28 03:19:05,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:05" (1/1) ... [2020-11-28 03:19:05,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:19:05,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:19:05,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:19:05,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:19:05,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/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 [2020-11-28 03:19:05,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:19:05,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:19:05,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:19:05,807 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-28 03:19:05,807 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-28 03:19:05,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:19:06,325 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:19:06,328 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 03:19:06,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:06 BoogieIcfgContainer [2020-11-28 03:19:06,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:19:06,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:19:06,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:19:06,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:19:06,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:19:05" (1/3) ... [2020-11-28 03:19:06,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@317d5168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:19:06, skipping insertion in model container [2020-11-28 03:19:06,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:05" (2/3) ... [2020-11-28 03:19:06,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@317d5168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:19:06, skipping insertion in model container [2020-11-28 03:19:06,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:06" (3/3) ... [2020-11-28 03:19:06,343 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o5-2.c [2020-11-28 03:19:06,357 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:19:06,362 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:19:06,377 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:19:06,421 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:19:06,421 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:19:06,421 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:19:06,421 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:19:06,421 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:19:06,422 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:19:06,422 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:19:06,422 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:19:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-11-28 03:19:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:19:06,447 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:06,448 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:06,449 INFO L429 AbstractCegarLoop]: === Iteration 1 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:19:06,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:06,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1299019465, now seen corresponding path program 1 times [2020-11-28 03:19:06,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:06,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661231604] [2020-11-28 03:19:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:06,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:19:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:19:06,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661231604] [2020-11-28 03:19:06,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:06,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:19:06,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808957246] [2020-11-28 03:19:06,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:19:06,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:06,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:19:06,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:06,815 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2020-11-28 03:19:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:06,884 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-11-28 03:19:06,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:19:06,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-28 03:19:06,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:06,895 INFO L225 Difference]: With dead ends: 31 [2020-11-28 03:19:06,895 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 03:19:06,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:06,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 03:19:06,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-28 03:19:06,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 03:19:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-11-28 03:19:06,963 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2020-11-28 03:19:06,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:06,964 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-11-28 03:19:06,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:19:06,964 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-11-28 03:19:06,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:19:06,966 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:06,966 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:06,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:19:06,967 INFO L429 AbstractCegarLoop]: === Iteration 2 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:19:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:06,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1393213329, now seen corresponding path program 1 times [2020-11-28 03:19:06,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:06,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031993022] [2020-11-28 03:19:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:07,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:19:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:07,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:19:07,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031993022] [2020-11-28 03:19:07,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:07,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:19:07,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519518664] [2020-11-28 03:19:07,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:19:07,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:07,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:19:07,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:19:07,194 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-11-28 03:19:07,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:07,235 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-11-28 03:19:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:19:07,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-11-28 03:19:07,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:07,239 INFO L225 Difference]: With dead ends: 30 [2020-11-28 03:19:07,239 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 03:19:07,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:19:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 03:19:07,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-11-28 03:19:07,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 03:19:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-28 03:19:07,247 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 21 [2020-11-28 03:19:07,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:07,248 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-28 03:19:07,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:19:07,249 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-28 03:19:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:19:07,250 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:07,250 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:07,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:19:07,251 INFO L429 AbstractCegarLoop]: === Iteration 3 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:19:07,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:07,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1392289808, now seen corresponding path program 1 times [2020-11-28 03:19:07,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:07,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343920400] [2020-11-28 03:19:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:07,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:19:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:07,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:19:07,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343920400] [2020-11-28 03:19:07,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011461532] [2020-11-28 03:19:07,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/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 [2020-11-28 03:19:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:07,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:19:07,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:19:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:19:07,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:19:07,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-28 03:19:07,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934849244] [2020-11-28 03:19:07,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:19:07,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:07,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:19:07,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:19:07,658 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2020-11-28 03:19:07,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:07,735 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-28 03:19:07,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:19:07,735 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-11-28 03:19:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:07,736 INFO L225 Difference]: With dead ends: 26 [2020-11-28 03:19:07,737 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 03:19:07,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:19:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 03:19:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-11-28 03:19:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 03:19:07,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-28 03:19:07,743 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-11-28 03:19:07,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:07,744 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-28 03:19:07,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:19:07,744 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-28 03:19:07,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:19:07,745 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:07,745 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:07,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 03:19:07,946 INFO L429 AbstractCegarLoop]: === Iteration 4 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:19:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:07,947 INFO L82 PathProgramCache]: Analyzing trace with hash -520713946, now seen corresponding path program 1 times [2020-11-28 03:19:07,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:07,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76073560] [2020-11-28 03:19:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:19:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-28 03:19:08,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76073560] [2020-11-28 03:19:08,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:08,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:19:08,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161255787] [2020-11-28 03:19:08,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:19:08,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:08,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:19:08,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:19:08,037 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 3 states. [2020-11-28 03:19:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:08,046 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-28 03:19:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:19:08,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-11-28 03:19:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:08,048 INFO L225 Difference]: With dead ends: 24 [2020-11-28 03:19:08,048 INFO L226 Difference]: Without dead ends: 23 [2020-11-28 03:19:08,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:19:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-28 03:19:08,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-28 03:19:08,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 03:19:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-11-28 03:19:08,053 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 25 [2020-11-28 03:19:08,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:08,053 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-11-28 03:19:08,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:19:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-11-28 03:19:08,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 03:19:08,055 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:08,055 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:08,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:19:08,055 INFO L429 AbstractCegarLoop]: === Iteration 5 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:19:08,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:08,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1425665596, now seen corresponding path program 1 times [2020-11-28 03:19:08,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:08,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161251284] [2020-11-28 03:19:08,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:19:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-28 03:19:08,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161251284] [2020-11-28 03:19:08,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:08,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:19:08,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465162927] [2020-11-28 03:19:08,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:19:08,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:08,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:19:08,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:08,150 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 4 states. [2020-11-28 03:19:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:08,169 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-11-28 03:19:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:19:08,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-28 03:19:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:08,171 INFO L225 Difference]: With dead ends: 23 [2020-11-28 03:19:08,171 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:19:08,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:08,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:19:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:19:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:19:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:19:08,173 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2020-11-28 03:19:08,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:08,173 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:19:08,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:19:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:19:08,174 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:19:08,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:19:08,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 03:19:08,194 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 03:19:08,194 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 03:19:08,194 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 03:19:08,194 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 03:19:08,194 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-11-28 03:19:08,195 INFO L274 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-11-28 03:19:08,195 INFO L277 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-11-28 03:19:08,195 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-11-28 03:19:08,195 INFO L274 CegarLoopResult]: For program point L13(lines 13 19) no Hoare annotation was computed. [2020-11-28 03:19:08,195 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-28 03:19:08,195 INFO L274 CegarLoopResult]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2020-11-28 03:19:08,196 INFO L274 CegarLoopResult]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2020-11-28 03:19:08,196 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2020-11-28 03:19:08,196 INFO L274 CegarLoopResult]: For program point idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 8) no Hoare annotation was computed. [2020-11-28 03:19:08,196 INFO L274 CegarLoopResult]: For program point idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 8) no Hoare annotation was computed. [2020-11-28 03:19:08,196 INFO L274 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-11-28 03:19:08,196 INFO L277 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-11-28 03:19:08,197 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-11-28 03:19:08,197 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-11-28 03:19:08,197 INFO L274 CegarLoopResult]: For program point L8-2(line 8) no Hoare annotation was computed. [2020-11-28 03:19:08,197 INFO L274 CegarLoopResult]: For program point L8-3(line 8) no Hoare annotation was computed. [2020-11-28 03:19:08,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:19:08 BoogieIcfgContainer [2020-11-28 03:19:08,202 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:19:08,202 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:19:08,202 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:19:08,202 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:19:08,203 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:06" (3/4) ... [2020-11-28 03:19:08,210 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:19:08,217 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-11-28 03:19:08,223 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-28 03:19:08,224 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:19:08,224 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:19:08,224 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:19:08,266 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e5e97b97-46b6-4269-95b9-a50589c8d318/bin/uautomizer/witness.graphml [2020-11-28 03:19:08,266 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:19:08,268 INFO L168 Benchmark]: Toolchain (without parser) took 2875.77 ms. Allocated memory was 94.4 MB in the beginning and 121.6 MB in the end (delta: 27.3 MB). Free memory was 64.7 MB in the beginning and 69.7 MB in the end (delta: -5.0 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:08,268 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 94.4 MB. Free memory was 56.1 MB in the beginning and 56.0 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:19:08,269 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.77 ms. Allocated memory was 94.4 MB in the beginning and 121.6 MB in the end (delta: 27.3 MB). Free memory was 64.7 MB in the beginning and 100.2 MB in the end (delta: -35.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:08,276 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.64 ms. Allocated memory is still 121.6 MB. Free memory was 100.2 MB in the beginning and 98.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:19:08,278 INFO L168 Benchmark]: Boogie Preprocessor took 17.29 ms. Allocated memory is still 121.6 MB. Free memory was 98.7 MB in the beginning and 97.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:08,278 INFO L168 Benchmark]: RCFGBuilder took 614.52 ms. Allocated memory is still 121.6 MB. Free memory was 97.4 MB in the beginning and 85.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:08,279 INFO L168 Benchmark]: TraceAbstraction took 1867.60 ms. Allocated memory is still 121.6 MB. Free memory was 84.9 MB in the beginning and 71.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:08,280 INFO L168 Benchmark]: Witness Printer took 63.69 ms. Allocated memory is still 121.6 MB. Free memory was 71.8 MB in the beginning and 69.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:08,283 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 94.4 MB. Free memory was 56.1 MB in the beginning and 56.0 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 273.77 ms. Allocated memory was 94.4 MB in the beginning and 121.6 MB in the end (delta: 27.3 MB). Free memory was 64.7 MB in the beginning and 100.2 MB in the end (delta: -35.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.64 ms. Allocated memory is still 121.6 MB. Free memory was 100.2 MB in the beginning and 98.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.29 ms. Allocated memory is still 121.6 MB. Free memory was 98.7 MB in the beginning and 97.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 614.52 ms. Allocated memory is still 121.6 MB. Free memory was 97.4 MB in the beginning and 85.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1867.60 ms. Allocated memory is still 121.6 MB. Free memory was 84.9 MB in the beginning and 71.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. * Witness Printer took 63.69 ms. Allocated memory is still 121.6 MB. Free memory was 71.8 MB in the beginning and 69.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 8]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 10 SDslu, 129 SDs, 0 SdLazy, 70 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 3 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 130 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 4290 SizeOfPredicates, 1 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 76/84 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...