./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-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 64bit --witnessprinter.graph.data.programhash 9f46c7b2b1e4ea0f04ba596f18cee8c318356c44 ................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:31:28,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:31:28,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:31:28,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:31:28,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:31:28,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:31:28,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:31:28,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:31:28,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:31:28,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:31:28,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:31:28,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:31:28,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:31:28,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:31:28,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:31:28,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:31:28,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:31:28,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:31:28,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:31:28,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:31:28,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:31:28,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:31:28,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:31:28,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:31:28,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:31:28,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:31:28,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:31:28,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:31:28,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:31:28,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:31:28,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:31:28,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:31:28,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:31:28,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:31:28,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:31:28,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:31:28,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:31:28,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:31:28,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:31:28,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:31:28,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:31:28,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-10-19 18:31:28,504 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:31:28,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:31:28,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:31:28,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:31:28,508 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:31:28,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:31:28,508 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:31:28,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:31:28,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:31:28,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 18:31:28,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:31:28,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 18:31:28,511 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-10-19 18:31:28,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:31:28,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:31:28,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 18:31:28,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:31:28,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:31:28,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:31:28,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:31:28,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:31:28,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:31:28,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:31:28,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 18:31:28,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:31:28,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:31:28,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 18:31:28,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:31:28,516 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f46c7b2b1e4ea0f04ba596f18cee8c318356c44 [2020-10-19 18:31:28,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:31:28,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:31:28,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:31:28,820 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:31:28,820 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:31:28,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2020-10-19 18:31:28,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba222055/58602bdc630543b2bec877b0e34cb1fb/FLAG4c4083c42 [2020-10-19 18:31:29,246 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:31:29,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2020-10-19 18:31:29,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba222055/58602bdc630543b2bec877b0e34cb1fb/FLAG4c4083c42 [2020-10-19 18:31:29,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba222055/58602bdc630543b2bec877b0e34cb1fb [2020-10-19 18:31:29,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:31:29,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:31:29,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:31:29,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:31:29,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:31:29,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:31:29" (1/1) ... [2020-10-19 18:31:29,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bfdb93f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:31:29, skipping insertion in model container [2020-10-19 18:31:29,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:31:29" (1/1) ... [2020-10-19 18:31:29,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:31:29,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:31:29,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:31:29,828 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:31:29,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:31:29,852 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:31:29,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:31:29 WrapperNode [2020-10-19 18:31:29,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:31:29,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:31:29,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:31:29,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:31:29,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:31:29" (1/1) ... [2020-10-19 18:31:29,867 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:31:29" (1/1) ... [2020-10-19 18:31:29,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:31:29,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:31:29,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:31:29,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:31:29,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:31:29" (1/1) ... [2020-10-19 18:31:29,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:31:29" (1/1) ... [2020-10-19 18:31:29,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:31:29" (1/1) ... [2020-10-19 18:31:29,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:31:29" (1/1) ... [2020-10-19 18:31:29,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:31:29" (1/1) ... [2020-10-19 18:31:29,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:31:29" (1/1) ... [2020-10-19 18:31:29,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:31:29" (1/1) ... [2020-10-19 18:31:29,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:31:29,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:31:29,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:31:29,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:31:29,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:31:29" (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 [2020-10-19 18:31:30,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:31:30,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:31:30,254 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:31:30,255 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-19 18:31:30,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:31:30 BoogieIcfgContainer [2020-10-19 18:31:30,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:31:30,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:31:30,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:31:30,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:31:30,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:31:29" (1/3) ... [2020-10-19 18:31:30,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676c0aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:31:30, skipping insertion in model container [2020-10-19 18:31:30,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:31:29" (2/3) ... [2020-10-19 18:31:30,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676c0aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:31:30, skipping insertion in model container [2020-10-19 18:31:30,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:31:30" (3/3) ... [2020-10-19 18:31:30,265 INFO L111 eAbstractionObserver]: Analyzing ICFG ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2020-10-19 18:31:30,275 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:31:30,281 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-19 18:31:30,295 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-19 18:31:30,319 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:31:30,319 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 18:31:30,319 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:31:30,319 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:31:30,320 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:31:30,320 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:31:30,320 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:31:30,320 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:31:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-19 18:31:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-19 18:31:30,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:31:30,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-19 18:31:30,343 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-19 18:31:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:31:30,349 INFO L82 PathProgramCache]: Analyzing trace with hash 959367, now seen corresponding path program 1 times [2020-10-19 18:31:30,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:31:30,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908985876] [2020-10-19 18:31:30,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:31:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:31:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:31:30,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908985876] [2020-10-19 18:31:30,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:31:30,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:31:30,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144151510] [2020-10-19 18:31:30,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:31:30,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:31:30,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:31:30,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:31:30,576 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2020-10-19 18:31:30,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:31:30,674 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-10-19 18:31:30,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:31:30,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-10-19 18:31:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:31:30,687 INFO L225 Difference]: With dead ends: 21 [2020-10-19 18:31:30,688 INFO L226 Difference]: Without dead ends: 8 [2020-10-19 18:31:30,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:31:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-19 18:31:30,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2020-10-19 18:31:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-19 18:31:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2020-10-19 18:31:30,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2020-10-19 18:31:30,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:31:30,724 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-10-19 18:31:30,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:31:30,724 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2020-10-19 18:31:30,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-10-19 18:31:30,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:31:30,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-10-19 18:31:30,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:31:30,725 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-19 18:31:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:31:30,726 INFO L82 PathProgramCache]: Analyzing trace with hash 29740420, now seen corresponding path program 1 times [2020-10-19 18:31:30,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:31:30,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129945535] [2020-10-19 18:31:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:31:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:31:30,738 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:31:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:31:30,744 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:31:30,762 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:31:30,762 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 18:31:30,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:31:30,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:31:30 BoogieIcfgContainer [2020-10-19 18:31:30,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:31:30,778 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:31:30,778 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:31:30,778 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:31:30,779 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:31:30" (3/4) ... [2020-10-19 18:31:30,781 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 18:31:30,814 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:31:30,815 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:31:30,817 INFO L168 Benchmark]: Toolchain (without parser) took 1177.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 955.9 MB in the beginning and 1.1 GB in the end (delta: -131.0 MB). Peak memory consumption was 5.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:31:30,818 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:31:30,819 INFO L168 Benchmark]: CACSL2BoogieTranslator took 208.31 ms. Allocated memory is still 1.0 GB. Free memory was 955.9 MB in the beginning and 945.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:31:30,820 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.98 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:31:30,821 INFO L168 Benchmark]: Boogie Preprocessor took 81.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -181.0 MB). Peak memory consumption was 15.3 MB. Max. memory is 11.5 GB. [2020-10-19 18:31:30,821 INFO L168 Benchmark]: RCFGBuilder took 288.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:31:30,822 INFO L168 Benchmark]: TraceAbstraction took 519.72 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 11.5 GB. [2020-10-19 18:31:30,823 INFO L168 Benchmark]: Witness Printer took 36.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:31:30,828 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 208.31 ms. Allocated memory is still 1.0 GB. Free memory was 955.9 MB in the beginning and 945.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.98 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 81.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -181.0 MB). Peak memory consumption was 15.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 288.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 519.72 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 11.5 GB. * Witness Printer took 36.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: integer overflow possible integer overflow possible We found a FailurePath: [L23] int x, oldx; [L24] x = __VERIFIER_nondet_int() [L25] oldx = __VERIFIER_nondet_int() [L26] x > 1 && -2*x == oldx [L26] -2*x - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 16 SDslu, 3 SDs, 0 SdLazy, 14 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 30 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 incorrect! Received shutdown request...