./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/BallRajamani-SPIN2000-Fig1.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 dc0ee77d2c77f6a72f7fe76138da8c8b9afd4553 ................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:45:32,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:45:32,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:45:32,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:45:32,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:45:32,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:45:32,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:45:32,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:45:32,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:45:32,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:45:32,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:45:32,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:45:32,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:45:32,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:45:32,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:45:32,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:45:32,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:45:32,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:45:32,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:45:32,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:45:32,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:45:32,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:45:32,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:45:32,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:45:32,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:45:32,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:45:32,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:45:32,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:45:32,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:45:32,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:45:32,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:45:32,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:45:32,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:45:32,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:45:32,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:45:32,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:45:32,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:45:32,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:45:32,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:45:32,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:45:32,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:45:32,738 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:45:32,768 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:45:32,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:45:32,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:45:32,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:45:32,770 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:45:32,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:45:32,770 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:45:32,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:45:32,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:45:32,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:45:32,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:45:32,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:45:32,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:45:32,771 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:45:32,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:45:32,772 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:45:32,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:45:32,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:45:32,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:45:32,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:45:32,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:45:32,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:45:32,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:45:32,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:45:32,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:45:32,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:45:32,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:45:32,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:45:32,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:45:32,774 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 ! 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 -> dc0ee77d2c77f6a72f7fe76138da8c8b9afd4553 [2020-10-20 01:45:32,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:45:33,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:45:33,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:45:33,013 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:45:33,014 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:45:33,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2020-10-20 01:45:33,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7eb99568/e7e4a5c088234d6b94ebe9b111879b61/FLAG182e4d89a [2020-10-20 01:45:33,556 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:45:33,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2020-10-20 01:45:33,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7eb99568/e7e4a5c088234d6b94ebe9b111879b61/FLAG182e4d89a [2020-10-20 01:45:33,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7eb99568/e7e4a5c088234d6b94ebe9b111879b61 [2020-10-20 01:45:33,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:45:33,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:45:33,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:45:33,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:45:33,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:45:33,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:45:33" (1/1) ... [2020-10-20 01:45:33,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@540fba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:33, skipping insertion in model container [2020-10-20 01:45:33,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:45:33" (1/1) ... [2020-10-20 01:45:33,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:45:34,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:45:34,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:45:34,268 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:45:34,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:45:34,300 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:45:34,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:34 WrapperNode [2020-10-20 01:45:34,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:45:34,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:45:34,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:45:34,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:45:34,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:34" (1/1) ... [2020-10-20 01:45:34,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:34" (1/1) ... [2020-10-20 01:45:34,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:45:34,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:45:34,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:45:34,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:45:34,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:34" (1/1) ... [2020-10-20 01:45:34,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:34" (1/1) ... [2020-10-20 01:45:34,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:34" (1/1) ... [2020-10-20 01:45:34,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:34" (1/1) ... [2020-10-20 01:45:34,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:34" (1/1) ... [2020-10-20 01:45:34,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:34" (1/1) ... [2020-10-20 01:45:34,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:34" (1/1) ... [2020-10-20 01:45:34,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:45:34,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:45:34,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:45:34,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:45:34,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:34" (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 01:45:34,418 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-10-20 01:45:34,419 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-10-20 01:45:34,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:45:34,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:45:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:45:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:45:34,629 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:45:34,630 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 01:45:34,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:45:34 BoogieIcfgContainer [2020-10-20 01:45:34,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:45:34,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:45:34,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:45:34,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:45:34,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:45:33" (1/3) ... [2020-10-20 01:45:34,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5025fd59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:45:34, skipping insertion in model container [2020-10-20 01:45:34,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:34" (2/3) ... [2020-10-20 01:45:34,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5025fd59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:45:34, skipping insertion in model container [2020-10-20 01:45:34,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:45:34" (3/3) ... [2020-10-20 01:45:34,641 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-10-20 01:45:34,654 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:45:34,665 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:45:34,682 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:45:34,720 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:45:34,721 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:45:34,721 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:45:34,721 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:45:34,721 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:45:34,722 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:45:34,722 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:45:34,724 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:45:34,750 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-20 01:45:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 01:45:34,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:45:34,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:45:34,760 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:45:34,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:45:34,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1977813505, now seen corresponding path program 1 times [2020-10-20 01:45:34,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:45:34,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934951115] [2020-10-20 01:45:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:45:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:34,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:45:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:35,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 01:45:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 01:45:35,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934951115] [2020-10-20 01:45:35,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920607540] [2020-10-20 01:45:35,049 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 01:45:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:35,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 01:45:35,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:45:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 01:45:35,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:45:35,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2020-10-20 01:45:35,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402853626] [2020-10-20 01:45:35,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 01:45:35,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:45:35,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 01:45:35,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:45:35,170 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 6 states. [2020-10-20 01:45:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:45:35,341 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2020-10-20 01:45:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 01:45:35,343 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-20 01:45:35,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:45:35,355 INFO L225 Difference]: With dead ends: 40 [2020-10-20 01:45:35,355 INFO L226 Difference]: Without dead ends: 17 [2020-10-20 01:45:35,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:45:35,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-20 01:45:35,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-20 01:45:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-20 01:45:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-20 01:45:35,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2020-10-20 01:45:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:45:35,406 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-20 01:45:35,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 01:45:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-20 01:45:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 01:45:35,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:45:35,409 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:45:35,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-10-20 01:45:35,619 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:45:35,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:45:35,620 INFO L82 PathProgramCache]: Analyzing trace with hash -528523467, now seen corresponding path program 1 times [2020-10-20 01:45:35,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:45:35,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718223838] [2020-10-20 01:45:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:45:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 01:45:35,666 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 01:45:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 01:45:35,717 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 01:45:35,757 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 01:45:35,758 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 01:45:35,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:45:35,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:45:35 BoogieIcfgContainer [2020-10-20 01:45:35,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:45:35,803 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:45:35,803 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:45:35,804 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:45:35,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:45:34" (3/4) ... [2020-10-20 01:45:35,807 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 01:45:35,877 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:45:35,877 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:45:35,881 INFO L168 Benchmark]: Toolchain (without parser) took 1915.83 ms. Allocated memory was 37.2 MB in the beginning and 50.9 MB in the end (delta: 13.6 MB). Free memory was 12.5 MB in the beginning and 16.3 MB in the end (delta: -3.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,882 INFO L168 Benchmark]: CDTParser took 0.82 ms. Allocated memory is still 37.2 MB. Free memory is still 16.4 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 01:45:35,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.69 ms. Allocated memory was 37.2 MB in the beginning and 45.1 MB in the end (delta: 7.9 MB). Free memory was 11.7 MB in the beginning and 28.5 MB in the end (delta: -16.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,883 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.14 ms. Allocated memory is still 45.1 MB. Free memory was 28.5 MB in the beginning and 26.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,884 INFO L168 Benchmark]: Boogie Preprocessor took 17.65 ms. Allocated memory is still 45.1 MB. Free memory was 26.9 MB in the beginning and 25.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,885 INFO L168 Benchmark]: RCFGBuilder took 278.50 ms. Allocated memory was 45.1 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Free memory was 25.7 MB in the beginning and 28.1 MB in the end (delta: -2.4 MB). Peak memory consumption was 15.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,885 INFO L168 Benchmark]: TraceAbstraction took 1169.45 ms. Allocated memory was 47.2 MB in the beginning and 50.9 MB in the end (delta: 3.7 MB). Free memory was 27.6 MB in the beginning and 19.8 MB in the end (delta: 7.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,886 INFO L168 Benchmark]: Witness Printer took 73.80 ms. Allocated memory is still 50.9 MB. Free memory was 19.8 MB in the beginning and 16.3 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,890 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.82 ms. Allocated memory is still 37.2 MB. Free memory is still 16.4 MB. There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 326.69 ms. Allocated memory was 37.2 MB in the beginning and 45.1 MB in the end (delta: 7.9 MB). Free memory was 11.7 MB in the beginning and 28.5 MB in the end (delta: -16.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 34.14 ms. Allocated memory is still 45.1 MB. Free memory was 28.5 MB in the beginning and 26.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 17.65 ms. Allocated memory is still 45.1 MB. Free memory was 26.9 MB in the beginning and 25.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 278.50 ms. Allocated memory was 45.1 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Free memory was 25.7 MB in the beginning and 28.1 MB in the end (delta: -2.4 MB). Peak memory consumption was 15.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1169.45 ms. Allocated memory was 47.2 MB in the beginning and 50.9 MB in the end (delta: 3.7 MB). Free memory was 27.6 MB in the beginning and 19.8 MB in the end (delta: 7.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 14.3 GB. * Witness Printer took 73.80 ms. Allocated memory is still 50.9 MB. Free memory was 19.8 MB in the beginning and 16.3 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] int g; VAL [g=0] [L28] int g = __VERIFIER_nondet_int(); [L29] int h = !g; VAL [g=0] [L30] CALL A(g,h) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=0, g=0] [L19] COND TRUE \read(a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=0, a1=-1, a2=0, g=0] [L20] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=-1, \old(g)=0, g=0] [L19] COND FALSE !(\read(a1)) [L22] g = a2 VAL [\old(a1)=0, \old(a2)=-1, \old(g)=0, a1=0, a2=-1, g=-1] [L20] RET A(a2,a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=0, A(a2,a1)=-2, a1=-1, a2=0, g=-1] [L30] RET A(g,h) VAL [g=-1] [L31] CALL A(g,h) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=-1, g=-1] [L19] COND TRUE \read(a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=-1, a1=-1, a2=0, g=-1] [L20] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=-1, \old(g)=-1, g=-1] [L19] COND FALSE !(\read(a1)) [L22] g = a2 VAL [\old(a1)=0, \old(a2)=-1, \old(g)=-1, a1=0, a2=-1, g=-1] [L20] RET A(a2,a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=-1, A(a2,a1)=-4, a1=-1, a2=0, g=-1] [L31] RET A(g,h) VAL [g=-1] [L32] COND TRUE \read(g) VAL [g=-1] [L3] __assert_fail("0", "BallRajamani-SPIN2000-Fig1.c", 3, "reach_error") VAL [g=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 10 SDslu, 36 SDs, 0 SdLazy, 44 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 930 SizeOfPredicates, 1 NumberOfNonLiveVariables, 83 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 2 InterpolantComputations, 0 PerfectInterpolantSequences, 2/8 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...