./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 f919edf50b278085ea884360d609205059ef996b ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:28:56,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:28:56,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:28:56,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:28:56,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:28:56,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:28:56,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:28:56,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:28:56,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:28:56,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:28:56,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:28:56,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:28:56,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:28:56,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:28:56,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:28:56,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:28:56,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:28:56,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:28:56,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:28:56,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:28:56,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:28:56,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:28:56,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:28:56,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:28:56,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:28:56,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:28:56,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:28:56,715 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:28:56,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:28:56,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:28:56,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:28:56,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:28:56,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:28:56,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:28:56,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:28:56,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:28:56,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:28:56,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:28:56,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:28:56,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:28:56,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:28:56,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2020-10-20 06:28:56,767 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:28:56,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:28:56,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:28:56,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:28:56,770 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:28:56,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:28:56,771 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:28:56,771 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:28:56,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:28:56,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:28:56,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:28:56,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 06:28:56,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:28:56,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 06:28:56,773 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-10-20 06:28:56,774 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:28:56,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:28:56,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:28:56,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 06:28:56,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:28:56,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:28:56,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:28:56,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:28:56,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:28:56,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:28:56,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:28:56,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 06:28:56,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:28:56,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:28:56,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 06:28:56,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:28:56,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> f919edf50b278085ea884360d609205059ef996b [2020-10-20 06:28:56,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:28:56,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:28:56,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:28:56,995 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:28:56,996 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:28:56,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2020-10-20 06:28:57,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f231e6a7/5632ada50a044f578dc4a3b07f6bdfa1/FLAG8acc895a3 [2020-10-20 06:28:57,494 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:28:57,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2020-10-20 06:28:57,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f231e6a7/5632ada50a044f578dc4a3b07f6bdfa1/FLAG8acc895a3 [2020-10-20 06:28:57,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f231e6a7/5632ada50a044f578dc4a3b07f6bdfa1 [2020-10-20 06:28:57,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:28:57,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:28:57,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:28:57,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:28:57,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:28:57,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:28:57" (1/1) ... [2020-10-20 06:28:57,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b3f9189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:57, skipping insertion in model container [2020-10-20 06:28:57,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:28:57" (1/1) ... [2020-10-20 06:28:57,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:28:57,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:28:58,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:28:58,302 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:28:58,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:28:58,343 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:28:58,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:58 WrapperNode [2020-10-20 06:28:58,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:28:58,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:28:58,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:28:58,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:28:58,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:58" (1/1) ... [2020-10-20 06:28:58,365 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:58" (1/1) ... [2020-10-20 06:28:58,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:28:58,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:28:58,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:28:58,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:28:58,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:58" (1/1) ... [2020-10-20 06:28:58,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:58" (1/1) ... [2020-10-20 06:28:58,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:58" (1/1) ... [2020-10-20 06:28:58,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:58" (1/1) ... [2020-10-20 06:28:58,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:58" (1/1) ... [2020-10-20 06:28:58,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:58" (1/1) ... [2020-10-20 06:28:58,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:58" (1/1) ... [2020-10-20 06:28:58,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:28:58,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:28:58,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:28:58,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:28:58,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:28:58,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:28:58,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:28:58,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:28:58,506 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-20 06:28:58,506 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-20 06:28:58,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:28:58,762 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:28:58,763 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 06:28:58,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:28:58 BoogieIcfgContainer [2020-10-20 06:28:58,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:28:58,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:28:58,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:28:58,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:28:58,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:28:57" (1/3) ... [2020-10-20 06:28:58,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f80d781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:28:58, skipping insertion in model container [2020-10-20 06:28:58,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:58" (2/3) ... [2020-10-20 06:28:58,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f80d781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:28:58, skipping insertion in model container [2020-10-20 06:28:58,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:28:58" (3/3) ... [2020-10-20 06:28:58,774 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2020-10-20 06:28:58,786 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:28:58,793 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 06:28:58,807 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 06:28:58,828 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:28:58,828 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 06:28:58,828 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:28:58,829 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:28:58,829 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:28:58,829 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:28:58,829 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:28:58,829 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:28:58,846 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-20 06:28:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 06:28:58,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:28:58,853 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:28:58,853 INFO L429 AbstractCegarLoop]: === Iteration 1 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:28:58,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:28:58,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1299019465, now seen corresponding path program 1 times [2020-10-20 06:28:58,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:28:58,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511621290] [2020-10-20 06:28:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:28:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:59,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 06:28:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 06:28:59,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511621290] [2020-10-20 06:28:59,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:28:59,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:28:59,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321458573] [2020-10-20 06:28:59,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:28:59,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:28:59,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:28:59,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:28:59,145 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2020-10-20 06:28:59,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:28:59,232 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-10-20 06:28:59,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:28:59,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-20 06:28:59,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:28:59,251 INFO L225 Difference]: With dead ends: 31 [2020-10-20 06:28:59,252 INFO L226 Difference]: Without dead ends: 19 [2020-10-20 06:28:59,256 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 [2020-10-20 06:28:59,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-20 06:28:59,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-20 06:28:59,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-20 06:28:59,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-20 06:28:59,310 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2020-10-20 06:28:59,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:28:59,317 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-20 06:28:59,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:28:59,318 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-20 06:28:59,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:28:59,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:28:59,321 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:28:59,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:28:59,321 INFO L429 AbstractCegarLoop]: === Iteration 2 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:28:59,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:28:59,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1393213329, now seen corresponding path program 1 times [2020-10-20 06:28:59,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:28:59,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316348226] [2020-10-20 06:28:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:28:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:59,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 06:28:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:59,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 06:28:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 06:28:59,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316348226] [2020-10-20 06:28:59,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:28:59,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 06:28:59,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647082144] [2020-10-20 06:28:59,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 06:28:59,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:28:59,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 06:28:59,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:28:59,452 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-20 06:28:59,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:28:59,487 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-20 06:28:59,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 06:28:59,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-20 06:28:59,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:28:59,491 INFO L225 Difference]: With dead ends: 30 [2020-10-20 06:28:59,491 INFO L226 Difference]: Without dead ends: 22 [2020-10-20 06:28:59,492 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 [2020-10-20 06:28:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-20 06:28:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-10-20 06:28:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 06:28:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-20 06:28:59,499 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 21 [2020-10-20 06:28:59,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:28:59,499 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-20 06:28:59,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 06:28:59,500 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-20 06:28:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:28:59,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:28:59,501 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:28:59,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:28:59,502 INFO L429 AbstractCegarLoop]: === Iteration 3 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:28:59,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:28:59,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1392289808, now seen corresponding path program 1 times [2020-10-20 06:28:59,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:28:59,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492752432] [2020-10-20 06:28:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:28:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:59,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 06:28:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:59,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 06:28:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 06:28:59,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492752432] [2020-10-20 06:28:59,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379693245] [2020-10-20 06:28:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:28:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:59,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 06:28:59,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:28:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 06:28:59,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:28:59,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 06:28:59,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405929088] [2020-10-20 06:28:59,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 06:28:59,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:28:59,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 06:28:59,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-20 06:28:59,802 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2020-10-20 06:28:59,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:28:59,872 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-20 06:28:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 06:28:59,873 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-20 06:28:59,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:28:59,874 INFO L225 Difference]: With dead ends: 26 [2020-10-20 06:28:59,874 INFO L226 Difference]: Without dead ends: 25 [2020-10-20 06:28:59,876 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 [2020-10-20 06:28:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-20 06:28:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-20 06:28:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 06:28:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-20 06:28:59,882 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-10-20 06:28:59,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:28:59,883 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-20 06:28:59,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 06:28:59,884 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-20 06:28:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 06:28:59,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:28:59,885 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:29:00,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 06:29:00,100 INFO L429 AbstractCegarLoop]: === Iteration 4 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:29:00,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:29:00,101 INFO L82 PathProgramCache]: Analyzing trace with hash -520713946, now seen corresponding path program 1 times [2020-10-20 06:29:00,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:29:00,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004950503] [2020-10-20 06:29:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:29:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:29:00,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 06:29:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:29:00,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 06:29:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:29:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-20 06:29:00,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004950503] [2020-10-20 06:29:00,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:29:00,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 06:29:00,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437541387] [2020-10-20 06:29:00,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:29:00,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:29:00,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:29:00,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:29:00,156 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 3 states. [2020-10-20 06:29:00,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:29:00,169 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-20 06:29:00,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:29:00,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-20 06:29:00,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:29:00,171 INFO L225 Difference]: With dead ends: 24 [2020-10-20 06:29:00,172 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 06:29:00,172 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 [2020-10-20 06:29:00,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 06:29:00,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-20 06:29:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-20 06:29:00,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-20 06:29:00,178 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 25 [2020-10-20 06:29:00,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:29:00,178 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-20 06:29:00,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:29:00,179 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-20 06:29:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-20 06:29:00,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:29:00,180 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:29:00,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 06:29:00,181 INFO L429 AbstractCegarLoop]: === Iteration 5 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:29:00,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:29:00,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1425665596, now seen corresponding path program 1 times [2020-10-20 06:29:00,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:29:00,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994567090] [2020-10-20 06:29:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:29:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:29:00,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 06:29:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:29:00,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 06:29:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:29:00,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 06:29:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:29:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-20 06:29:00,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994567090] [2020-10-20 06:29:00,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:29:00,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:29:00,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973200522] [2020-10-20 06:29:00,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:29:00,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:29:00,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:29:00,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:29:00,268 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 4 states. [2020-10-20 06:29:00,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:29:00,283 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-10-20 06:29:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:29:00,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-20 06:29:00,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:29:00,284 INFO L225 Difference]: With dead ends: 23 [2020-10-20 06:29:00,284 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 06:29:00,286 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 [2020-10-20 06:29:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 06:29:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 06:29:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 06:29:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 06:29:00,286 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2020-10-20 06:29:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:29:00,287 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:29:00,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:29:00,287 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:29:00,287 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 06:29:00,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 06:29:00,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 06:29:00,308 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 06:29:00,308 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 06:29:00,308 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 06:29:00,308 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 06:29:00,308 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-10-20 06:29:00,308 INFO L274 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-10-20 06:29:00,309 INFO L277 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-10-20 06:29:00,309 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-20 06:29:00,309 INFO L274 CegarLoopResult]: For program point L13(lines 13 19) no Hoare annotation was computed. [2020-10-20 06:29:00,309 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-20 06:29:00,309 INFO L274 CegarLoopResult]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2020-10-20 06:29:00,309 INFO L274 CegarLoopResult]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-20 06:29:00,310 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2020-10-20 06:29:00,310 INFO L274 CegarLoopResult]: For program point idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 8) no Hoare annotation was computed. [2020-10-20 06:29:00,311 INFO L274 CegarLoopResult]: For program point idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 8) no Hoare annotation was computed. [2020-10-20 06:29:00,311 INFO L274 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-10-20 06:29:00,311 INFO L277 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-10-20 06:29:00,311 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-20 06:29:00,311 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-10-20 06:29:00,311 INFO L274 CegarLoopResult]: For program point L8-2(line 8) no Hoare annotation was computed. [2020-10-20 06:29:00,311 INFO L274 CegarLoopResult]: For program point L8-3(line 8) no Hoare annotation was computed. [2020-10-20 06:29:00,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:29:00 BoogieIcfgContainer [2020-10-20 06:29:00,318 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:29:00,319 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:29:00,319 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:29:00,319 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:29:00,320 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:28:58" (3/4) ... [2020-10-20 06:29:00,324 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 06:29:00,331 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-10-20 06:29:00,336 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-20 06:29:00,337 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 06:29:00,337 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 06:29:00,337 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 06:29:00,384 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:29:00,384 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:29:00,387 INFO L168 Benchmark]: Toolchain (without parser) took 2454.19 ms. Allocated memory was 35.7 MB in the beginning and 49.3 MB in the end (delta: 13.6 MB). Free memory was 15.3 MB in the beginning and 17.7 MB in the end (delta: -2.5 MB). Peak memory consumption was 11.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:29:00,388 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 33.6 MB. Free memory was 9.4 MB in the beginning and 9.4 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. [2020-10-20 06:29:00,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 405.92 ms. Allocated memory was 35.7 MB in the beginning and 44.6 MB in the end (delta: 8.9 MB). Free memory was 14.3 MB in the beginning and 26.1 MB in the end (delta: -11.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:29:00,389 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.82 ms. Allocated memory is still 44.6 MB. Free memory was 26.1 MB in the beginning and 24.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 06:29:00,390 INFO L168 Benchmark]: Boogie Preprocessor took 44.77 ms. Allocated memory is still 44.6 MB. Free memory was 24.5 MB in the beginning and 23.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:29:00,390 INFO L168 Benchmark]: RCFGBuilder took 334.13 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 23.3 MB in the beginning and 21.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 14.3 GB. [2020-10-20 06:29:00,391 INFO L168 Benchmark]: TraceAbstraction took 1552.07 ms. Allocated memory was 46.1 MB in the beginning and 49.3 MB in the end (delta: 3.1 MB). Free memory was 21.4 MB in the beginning and 21.1 MB in the end (delta: 315.6 kB). Peak memory consumption was 3.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:29:00,392 INFO L168 Benchmark]: Witness Printer took 65.51 ms. Allocated memory is still 49.3 MB. Free memory was 21.1 MB in the beginning and 17.7 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:29:00,397 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 33.6 MB. Free memory was 9.4 MB in the beginning and 9.4 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 405.92 ms. Allocated memory was 35.7 MB in the beginning and 44.6 MB in the end (delta: 8.9 MB). Free memory was 14.3 MB in the beginning and 26.1 MB in the end (delta: -11.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 39.82 ms. Allocated memory is still 44.6 MB. Free memory was 26.1 MB in the beginning and 24.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 44.77 ms. Allocated memory is still 44.6 MB. Free memory was 24.5 MB in the beginning and 23.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 334.13 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 23.3 MB in the beginning and 21.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1552.07 ms. Allocated memory was 46.1 MB in the beginning and 49.3 MB in the end (delta: 3.1 MB). Free memory was 21.4 MB in the beginning and 21.1 MB in the end (delta: 315.6 kB). Peak memory consumption was 3.5 MB. Max. memory is 14.3 GB. * Witness Printer took 65.51 ms. Allocated memory is still 49.3 MB. Free memory was 21.1 MB in the beginning and 17.7 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 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: 1.4s, 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, 0.1s SatisfiabilityAnalysisTime, 0.5s 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...