./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab 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/ldv-regression/test06.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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eae8c8207b0324f06a17c285b94ce79cd751d6f9 .................................................................................................................................................................................................................................................................................. 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 0.1.24-30f4e4a [2019-11-27 23:53:14,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 23:53:14,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 23:53:14,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 23:53:14,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 23:53:14,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 23:53:14,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 23:53:14,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 23:53:14,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 23:53:14,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 23:53:14,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 23:53:14,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 23:53:14,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 23:53:14,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 23:53:14,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 23:53:14,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 23:53:14,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 23:53:14,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 23:53:14,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 23:53:14,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 23:53:14,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 23:53:14,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 23:53:14,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 23:53:14,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 23:53:14,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 23:53:14,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 23:53:14,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 23:53:14,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 23:53:14,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 23:53:14,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 23:53:14,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:53:14,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:53:14,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:53:14,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:53:14,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:53:14,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:53:14,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:53:14,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:53:14,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:53:14,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:53:14,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:53:14,351 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 23:53:14,388 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:53:14,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:53:14,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:53:14,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:53:14,393 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:53:14,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:53:14,394 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:53:14,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 23:53:14,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:53:14,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:53:14,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:53:14,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:53:14,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:53:14,397 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:53:14,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:53:14,399 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:53:14,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:53:14,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:53:14,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:53:14,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:53:14,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:53:14,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:53:14,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:53:14,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:53:14,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:53:14,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 23:53:14,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 23:53:14,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:53:14,404 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(__VERIFIER_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 -> eae8c8207b0324f06a17c285b94ce79cd751d6f9 [2019-11-27 23:53:14,731 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:53:14,751 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:53:14,755 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:53:14,757 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:53:14,757 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:53:14,759 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test06.c [2019-11-27 23:53:14,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/694e3f1bb/298618227e234e318244e44b8c828445/FLAG3def43ead [2019-11-27 23:53:15,276 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:53:15,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test06.c [2019-11-27 23:53:15,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/694e3f1bb/298618227e234e318244e44b8c828445/FLAG3def43ead [2019-11-27 23:53:15,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/694e3f1bb/298618227e234e318244e44b8c828445 [2019-11-27 23:53:15,700 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:53:15,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:53:15,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:53:15,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:53:15,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:53:15,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:53:15" (1/1) ... [2019-11-27 23:53:15,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155b5aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:15, skipping insertion in model container [2019-11-27 23:53:15,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:53:15" (1/1) ... [2019-11-27 23:53:15,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:53:15,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:53:15,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:53:15,975 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:53:15,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:53:16,017 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:53:16,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:16 WrapperNode [2019-11-27 23:53:16,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:53:16,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:53:16,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:53:16,020 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:53:16,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:16" (1/1) ... [2019-11-27 23:53:16,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:16" (1/1) ... [2019-11-27 23:53:16,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:53:16,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:53:16,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:53:16,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:53:16,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:16" (1/1) ... [2019-11-27 23:53:16,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:16" (1/1) ... [2019-11-27 23:53:16,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:16" (1/1) ... [2019-11-27 23:53:16,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:16" (1/1) ... [2019-11-27 23:53:16,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:16" (1/1) ... [2019-11-27 23:53:16,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:16" (1/1) ... [2019-11-27 23:53:16,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:16" (1/1) ... [2019-11-27 23:53:16,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:53:16,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:53:16,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:53:16,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:53:16,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:16" (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 [2019-11-27 23:53:16,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 23:53:16,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-27 23:53:16,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:53:16,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:53:16,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 23:53:16,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-27 23:53:16,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-27 23:53:16,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-27 23:53:16,555 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:53:16,555 INFO L297 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-27 23:53:16,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:53:16 BoogieIcfgContainer [2019-11-27 23:53:16,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:53:16,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:53:16,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:53:16,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:53:16,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:53:15" (1/3) ... [2019-11-27 23:53:16,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28220c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:53:16, skipping insertion in model container [2019-11-27 23:53:16,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:16" (2/3) ... [2019-11-27 23:53:16,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28220c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:53:16, skipping insertion in model container [2019-11-27 23:53:16,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:53:16" (3/3) ... [2019-11-27 23:53:16,565 INFO L109 eAbstractionObserver]: Analyzing ICFG test06.c [2019-11-27 23:53:16,576 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:53:16,583 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 23:53:16,594 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 23:53:16,619 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:53:16,619 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:53:16,619 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:53:16,619 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:53:16,619 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:53:16,619 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:53:16,620 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:53:16,620 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:53:16,634 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-27 23:53:16,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-27 23:53:16,640 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:16,641 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-27 23:53:16,641 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:16,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:16,648 INFO L82 PathProgramCache]: Analyzing trace with hash 889629865, now seen corresponding path program 1 times [2019-11-27 23:53:16,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:16,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131917765] [2019-11-27 23:53:16,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:16,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131917765] [2019-11-27 23:53:16,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:53:16,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 23:53:16,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573500014] [2019-11-27 23:53:16,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 23:53:16,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:16,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 23:53:16,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 23:53:16,880 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-27 23:53:16,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:16,907 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2019-11-27 23:53:16,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 23:53:16,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-27 23:53:16,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:16,917 INFO L225 Difference]: With dead ends: 18 [2019-11-27 23:53:16,917 INFO L226 Difference]: Without dead ends: 8 [2019-11-27 23:53:16,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 23:53:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-27 23:53:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-27 23:53:16,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-27 23:53:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2019-11-27 23:53:16,951 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 6 [2019-11-27 23:53:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:16,951 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2019-11-27 23:53:16,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 23:53:16,952 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2019-11-27 23:53:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-27 23:53:16,952 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:16,952 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:16,953 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:16,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:16,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1804905802, now seen corresponding path program 1 times [2019-11-27 23:53:16,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:16,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162350735] [2019-11-27 23:53:16,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:53:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:53:17,166 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 23:53:17,169 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 23:53:17,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:53:17 BoogieIcfgContainer [2019-11-27 23:53:17,205 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:53:17,206 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:53:17,206 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:53:17,206 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:53:17,207 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:53:16" (3/4) ... [2019-11-27 23:53:17,209 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 23:53:17,280 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 23:53:17,280 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:53:17,283 INFO L168 Benchmark]: Toolchain (without parser) took 1580.26 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.3 MB). Free memory was 961.7 MB in the beginning and 1.0 GB in the end (delta: -82.2 MB). Peak memory consumption was 33.1 MB. Max. memory is 11.5 GB. [2019-11-27 23:53:17,284 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:53:17,285 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.82 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:53:17,286 INFO L168 Benchmark]: Boogie Procedure Inliner took 115.28 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.3 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -154.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:53:17,287 INFO L168 Benchmark]: Boogie Preprocessor took 29.93 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:53:17,287 INFO L168 Benchmark]: RCFGBuilder took 391.04 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-11-27 23:53:17,288 INFO L168 Benchmark]: TraceAbstraction took 648.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 33.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:53:17,289 INFO L168 Benchmark]: Witness Printer took 74.59 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:53:17,294 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 315.82 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 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 115.28 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.3 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -154.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.93 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 391.04 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 648.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 33.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 11.5 GB. * Witness Printer took 74.59 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 40]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int a, b; [L22] int *p1, *p2; [L24] p1 = &a [L25] p2 = &b [L27] b = 1 [L28] a = 5 [L30] EXPR \read(a) [L30] a-- [L32] EXPR \read(a) [L12] COND TRUE a == 4 [L5] EXPR \read(**p2) [L5] int *pq = *p2; [L7] EXPR \read(**p2) [L7] *p1 = *p2 [L8] *pq = 0 [L14] return 1; [L32] a = f(a, &p1, &p2) [L34] EXPR \read(*p1) [L34] COND TRUE *p1 == 0 [L40] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 8 SDslu, 1 SDs, 0 SdLazy, 1 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 35 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...