./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 f470102c 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 0.1.25-f470102 [2019-11-28 16:57:26,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 16:57:26,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 16:57:26,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 16:57:26,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 16:57:26,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 16:57:26,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 16:57:26,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 16:57:26,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 16:57:26,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 16:57:26,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 16:57:26,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 16:57:26,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 16:57:26,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 16:57:26,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 16:57:26,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 16:57:26,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 16:57:26,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 16:57:26,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 16:57:26,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 16:57:26,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 16:57:26,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 16:57:26,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 16:57:26,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 16:57:26,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 16:57:26,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 16:57:26,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 16:57:26,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 16:57:26,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 16:57:26,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 16:57:26,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:57:26,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:57:26,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:57:26,778 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:57:26,779 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:57:26,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:57:26,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:57:26,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:57:26,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:57:26,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:57:26,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:57:26,784 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 16:57:26,806 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:57:26,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:57:26,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:57:26,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:57:26,810 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:57:26,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:57:26,811 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:57:26,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 16:57:26,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:57:26,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:57:26,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:57:26,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:57:26,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:57:26,814 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:57:26,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:57:26,815 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:57:26,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:57:26,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:57:26,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:57:26,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:57:26,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:57:26,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:57:26,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:57:26,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:57:26,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:57:26,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 16:57:26,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 16:57:26,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:57:26,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:57:26,819 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 [2019-11-28 16:57:27,174 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:57:27,194 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:57:27,198 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:57:27,200 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:57:27,200 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:57:27,201 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test06.c [2019-11-28 16:57:27,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3223bb5f4/c471744bd5ca48fc8017e353c559f8fb/FLAG955ae7477 [2019-11-28 16:57:27,764 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:57:27,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test06.c [2019-11-28 16:57:27,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3223bb5f4/c471744bd5ca48fc8017e353c559f8fb/FLAG955ae7477 [2019-11-28 16:57:28,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3223bb5f4/c471744bd5ca48fc8017e353c559f8fb [2019-11-28 16:57:28,201 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:57:28,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:57:28,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:57:28,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:57:28,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:57:28,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:57:28" (1/1) ... [2019-11-28 16:57:28,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@153481d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:28, skipping insertion in model container [2019-11-28 16:57:28,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:57:28" (1/1) ... [2019-11-28 16:57:28,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:57:28,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:57:28,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:57:28,542 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:57:28,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:57:28,587 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:57:28,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:28 WrapperNode [2019-11-28 16:57:28,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:57:28,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:57:28,590 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:57:28,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:57:28,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:28" (1/1) ... [2019-11-28 16:57:28,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:28" (1/1) ... [2019-11-28 16:57:28,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:57:28,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:57:28,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:57:28,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:57:28,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:28" (1/1) ... [2019-11-28 16:57:28,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:28" (1/1) ... [2019-11-28 16:57:28,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:28" (1/1) ... [2019-11-28 16:57:28,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:28" (1/1) ... [2019-11-28 16:57:28,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:28" (1/1) ... [2019-11-28 16:57:28,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:28" (1/1) ... [2019-11-28 16:57:28,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:28" (1/1) ... [2019-11-28 16:57:28,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:57:28,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:57:28,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:57:28,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:57:28,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:28" (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 [2019-11-28 16:57:28,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 16:57:28,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-28 16:57:28,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:57:28,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:57:28,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 16:57:28,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 16:57:28,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-28 16:57:28,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 16:57:29,261 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:57:29,261 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-28 16:57:29,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:29 BoogieIcfgContainer [2019-11-28 16:57:29,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:57:29,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:57:29,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:57:29,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:57:29,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:57:28" (1/3) ... [2019-11-28 16:57:29,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d774cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:57:29, skipping insertion in model container [2019-11-28 16:57:29,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:28" (2/3) ... [2019-11-28 16:57:29,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d774cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:57:29, skipping insertion in model container [2019-11-28 16:57:29,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:29" (3/3) ... [2019-11-28 16:57:29,275 INFO L109 eAbstractionObserver]: Analyzing ICFG test06.c [2019-11-28 16:57:29,285 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:57:29,296 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 16:57:29,311 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 16:57:29,338 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:57:29,338 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:57:29,338 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:57:29,338 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:57:29,339 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:57:29,339 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:57:29,339 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:57:29,339 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:57:29,353 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-28 16:57:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-28 16:57:29,358 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:29,359 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-28 16:57:29,360 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:29,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:29,367 INFO L82 PathProgramCache]: Analyzing trace with hash 889629865, now seen corresponding path program 1 times [2019-11-28 16:57:29,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:29,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337156979] [2019-11-28 16:57:29,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:29,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337156979] [2019-11-28 16:57:29,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:57:29,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 16:57:29,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915788181] [2019-11-28 16:57:29,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 16:57:29,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:29,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 16:57:29,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 16:57:29,618 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-28 16:57:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:29,648 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2019-11-28 16:57:29,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 16:57:29,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-28 16:57:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:29,662 INFO L225 Difference]: With dead ends: 18 [2019-11-28 16:57:29,662 INFO L226 Difference]: Without dead ends: 8 [2019-11-28 16:57:29,668 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 [2019-11-28 16:57:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-28 16:57:29,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-28 16:57:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 16:57:29,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2019-11-28 16:57:29,709 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 6 [2019-11-28 16:57:29,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:29,709 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2019-11-28 16:57:29,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 16:57:29,710 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2019-11-28 16:57:29,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 16:57:29,710 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:29,710 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:29,711 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:29,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:29,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1804905802, now seen corresponding path program 1 times [2019-11-28 16:57:29,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:29,713 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369912216] [2019-11-28 16:57:29,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:57:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:57:29,950 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 16:57:29,950 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 16:57:29,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:57:29 BoogieIcfgContainer [2019-11-28 16:57:29,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 16:57:29,983 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 16:57:29,984 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 16:57:29,984 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 16:57:29,984 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:29" (3/4) ... [2019-11-28 16:57:29,987 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 16:57:30,038 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 16:57:30,038 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 16:57:30,040 INFO L168 Benchmark]: Toolchain (without parser) took 1837.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -135.5 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:30,040 INFO L168 Benchmark]: CDTParser took 0.83 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:57:30,041 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.97 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:30,042 INFO L168 Benchmark]: Boogie Procedure Inliner took 152.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -204.3 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:30,043 INFO L168 Benchmark]: Boogie Preprocessor took 55.20 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: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:30,044 INFO L168 Benchmark]: RCFGBuilder took 463.97 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: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:30,044 INFO L168 Benchmark]: TraceAbstraction took 719.60 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: 32.6 MB). Peak memory consumption was 32.6 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:30,045 INFO L168 Benchmark]: Witness Printer took 54.41 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. [2019-11-28 16:57:30,049 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 385.97 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.2 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 152.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -204.3 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 55.20 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: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 463.97 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: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 719.60 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: 32.6 MB). Peak memory consumption was 32.6 MB. Max. memory is 11.5 GB. * Witness Printer took 54.41 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: 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: 0.6s, 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...