./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/multivar_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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_1.5.800.v20200727-1323.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/loop-acceleration/multivar_1-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 861db9a9b9abbb43938a556fb2b0e0e57d6b01ce ......................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 22:19:29,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:19:29,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:19:29,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:19:29,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:19:29,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:19:29,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:19:29,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:19:29,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:19:29,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:19:29,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:19:29,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:19:29,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:19:29,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:19:29,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:19:29,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:19:29,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:19:29,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:19:29,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:19:29,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:19:29,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:19:29,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:19:29,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:19:29,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:19:29,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:19:29,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:19:29,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:19:29,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:19:29,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:19:29,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:19:29,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:19:29,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:19:29,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:19:29,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:19:29,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:19:29,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:19:29,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:19:29,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:19:29,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:19:29,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:19:29,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:19:29,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:19:29,756 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:19:29,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:19:29,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:19:29,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:19:29,759 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:19:29,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:19:29,760 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:19:29,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:19:29,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:19:29,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:19:29,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:19:29,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:19:29,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:19:29,762 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:19:29,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:19:29,762 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:19:29,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:19:29,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:19:29,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:19:29,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:19:29,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:19:29,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:19:29,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:19:29,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:19:29,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:19:29,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:19:29,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:19:29,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:19:29,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:19:29,767 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 861db9a9b9abbb43938a556fb2b0e0e57d6b01ce [2020-10-25 22:19:30,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:19:30,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:19:30,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:19:30,266 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:19:30,267 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:19:30,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/multivar_1-1.c [2020-10-25 22:19:30,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c3b415fa/e4fc3ebae262443c88196526bea5375a/FLAG19d8bc7e3 [2020-10-25 22:19:30,995 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:19:30,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/multivar_1-1.c [2020-10-25 22:19:31,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c3b415fa/e4fc3ebae262443c88196526bea5375a/FLAG19d8bc7e3 [2020-10-25 22:19:31,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c3b415fa/e4fc3ebae262443c88196526bea5375a [2020-10-25 22:19:31,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:19:31,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:19:31,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:19:31,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:19:31,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:19:31,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:19:31" (1/1) ... [2020-10-25 22:19:31,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@685fa1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:31, skipping insertion in model container [2020-10-25 22:19:31,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:19:31" (1/1) ... [2020-10-25 22:19:31,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:19:31,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:19:31,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:19:31,651 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:19:31,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:19:31,685 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:19:31,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:31 WrapperNode [2020-10-25 22:19:31,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:19:31,687 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:19:31,687 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:19:31,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:19:31,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:31" (1/1) ... [2020-10-25 22:19:31,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:31" (1/1) ... [2020-10-25 22:19:31,726 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:19:31,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:19:31,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:19:31,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:19:31,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:31" (1/1) ... [2020-10-25 22:19:31,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:31" (1/1) ... [2020-10-25 22:19:31,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:31" (1/1) ... [2020-10-25 22:19:31,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:31" (1/1) ... [2020-10-25 22:19:31,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:31" (1/1) ... [2020-10-25 22:19:31,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:31" (1/1) ... [2020-10-25 22:19:31,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:31" (1/1) ... [2020-10-25 22:19:31,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:19:31,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:19:31,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:19:31,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:19:31,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:31" (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 [2020-10-25 22:19:31,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:19:31,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:19:31,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:19:31,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:19:32,072 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:19:32,073 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-25 22:19:32,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:19:32 BoogieIcfgContainer [2020-10-25 22:19:32,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:19:32,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:19:32,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:19:32,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:19:32,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:19:31" (1/3) ... [2020-10-25 22:19:32,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b69fcdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:19:32, skipping insertion in model container [2020-10-25 22:19:32,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:31" (2/3) ... [2020-10-25 22:19:32,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b69fcdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:19:32, skipping insertion in model container [2020-10-25 22:19:32,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:19:32" (3/3) ... [2020-10-25 22:19:32,087 INFO L111 eAbstractionObserver]: Analyzing ICFG multivar_1-1.c [2020-10-25 22:19:32,102 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:19:32,109 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:19:32,125 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:19:32,159 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:19:32,160 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:19:32,160 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:19:32,160 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:19:32,161 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:19:32,161 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:19:32,161 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:19:32,161 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:19:32,197 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-10-25 22:19:32,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-25 22:19:32,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:19:32,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-25 22:19:32,221 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:19:32,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:19:32,242 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-10-25 22:19:32,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:19:32,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257249359] [2020-10-25 22:19:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:19:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:19:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:32,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257249359] [2020-10-25 22:19:32,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:19:32,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 22:19:32,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143523960] [2020-10-25 22:19:32,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:19:32,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:19:32,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:19:32,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:19:32,642 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2020-10-25 22:19:32,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:19:32,706 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-10-25 22:19:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:19:32,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-25 22:19:32,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:19:32,718 INFO L225 Difference]: With dead ends: 16 [2020-10-25 22:19:32,718 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 22:19:32,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:19:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 22:19:32,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 22:19:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 22:19:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 22:19:32,761 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2020-10-25 22:19:32,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:19:32,762 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 22:19:32,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:19:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 22:19:32,763 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 22:19:32,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:19:32,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 22:19:32,796 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 22:19:32,796 INFO L270 CegarLoopResult]: At program point L17-2(lines 17 20) the Hoare annotation is: (= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) [2020-10-25 22:19:32,797 INFO L274 CegarLoopResult]: For program point L17-3(lines 17 20) no Hoare annotation was computed. [2020-10-25 22:19:32,797 INFO L274 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-25 22:19:32,797 INFO L270 CegarLoopResult]: At program point L7-2(lines 1 23) the Hoare annotation is: (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0)) [2020-10-25 22:19:32,798 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-25 22:19:32,798 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 22:19:32,798 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 22:19:32,798 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 22:19:32,798 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-25 22:19:32,799 INFO L274 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-25 22:19:32,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:19:32 BoogieIcfgContainer [2020-10-25 22:19:32,819 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:19:32,820 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:19:32,820 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:19:32,820 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:19:32,821 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:19:32" (3/4) ... [2020-10-25 22:19:32,825 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 22:19:32,837 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-25 22:19:32,837 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-25 22:19:32,838 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:19:32,838 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:19:32,884 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:19:32,885 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:19:32,888 INFO L168 Benchmark]: Toolchain (without parser) took 1519.64 ms. Allocated memory was 41.9 MB in the beginning and 52.4 MB in the end (delta: 10.5 MB). Free memory was 21.5 MB in the beginning and 29.2 MB in the end (delta: -7.6 MB). Peak memory consumption was 2.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:32,889 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 41.9 MB. Free memory is still 26.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:19:32,890 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.66 ms. Allocated memory is still 41.9 MB. Free memory was 20.8 MB in the beginning and 19.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:32,891 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.41 ms. Allocated memory is still 41.9 MB. Free memory was 19.8 MB in the beginning and 18.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:32,891 INFO L168 Benchmark]: Boogie Preprocessor took 28.80 ms. Allocated memory is still 41.9 MB. Free memory was 18.4 MB in the beginning and 17.5 MB in the end (delta: 887.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:19:32,892 INFO L168 Benchmark]: RCFGBuilder took 318.56 ms. Allocated memory was 41.9 MB in the beginning and 52.4 MB in the end (delta: 10.5 MB). Free memory was 17.4 MB in the beginning and 27.7 MB in the end (delta: -10.3 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:32,893 INFO L168 Benchmark]: TraceAbstraction took 741.17 ms. Allocated memory is still 52.4 MB. Free memory was 27.2 MB in the beginning and 31.5 MB in the end (delta: -4.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:19:32,894 INFO L168 Benchmark]: Witness Printer took 65.07 ms. Allocated memory is still 52.4 MB. Free memory was 31.5 MB in the beginning and 29.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:32,898 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 41.9 MB. Free memory is still 26.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 312.66 ms. Allocated memory is still 41.9 MB. Free memory was 20.8 MB in the beginning and 19.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.41 ms. Allocated memory is still 41.9 MB. Free memory was 19.8 MB in the beginning and 18.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.80 ms. Allocated memory is still 41.9 MB. Free memory was 18.4 MB in the beginning and 17.5 MB in the end (delta: 887.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 318.56 ms. Allocated memory was 41.9 MB in the beginning and 52.4 MB in the end (delta: 10.5 MB). Free memory was 17.4 MB in the beginning and 27.7 MB in the end (delta: -10.3 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 741.17 ms. Allocated memory is still 52.4 MB. Free memory was 27.2 MB in the beginning and 31.5 MB in the end (delta: -4.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 65.07 ms. Allocated memory is still 52.4 MB. Free memory was 31.5 MB in the beginning and 29.2 MB in the end (delta: 2.4 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: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: y == x - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: !(0 == cond) && y == x - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4 SDtfs, 7 SDslu, 3 SDs, 0 SdLazy, 6 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 3 NumberOfFragments, 11 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 60 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...