./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/while_infinite_loop_4.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/loops/while_infinite_loop_4.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 ef9ee2b82a40720ec57dc1562759dd601b686b38 .................................................................................................................................................................................................................................................................... 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 17:04:14,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:04:14,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:04:14,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:04:14,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:04:14,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:04:14,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:04:14,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:04:14,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:04:14,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:04:14,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:04:14,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:04:14,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:04:14,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:04:14,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:04:14,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:04:14,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:04:14,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:04:14,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:04:14,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:04:14,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:04:14,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:04:14,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:04:14,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:04:14,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:04:14,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:04:14,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:04:14,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:04:14,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:04:14,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:04:14,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:04:14,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:04:14,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:04:14,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:04:14,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:04:14,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:04:14,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:04:14,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:04:14,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:04:14,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:04:14,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:04:14,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:04:14,998 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:04:14,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:04:14,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:04:15,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:04:15,000 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:04:15,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:04:15,001 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:04:15,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:04:15,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:04:15,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:04:15,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:04:15,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:04:15,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:04:15,003 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:04:15,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:04:15,003 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:04:15,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:04:15,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:04:15,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:04:15,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:04:15,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:04:15,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:04:15,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:04:15,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:04:15,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:04:15,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:04:15,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:04:15,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:04:15,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:04:15,007 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 -> ef9ee2b82a40720ec57dc1562759dd601b686b38 [2019-11-28 17:04:15,307 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:04:15,324 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:04:15,328 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:04:15,330 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:04:15,331 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:04:15,332 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/while_infinite_loop_4.c [2019-11-28 17:04:15,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39efef922/18fb25d29feb42449da3a0af638fe30a/FLAG662c9fb52 [2019-11-28 17:04:15,864 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:04:15,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/while_infinite_loop_4.c [2019-11-28 17:04:15,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39efef922/18fb25d29feb42449da3a0af638fe30a/FLAG662c9fb52 [2019-11-28 17:04:16,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39efef922/18fb25d29feb42449da3a0af638fe30a [2019-11-28 17:04:16,248 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:04:16,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:04:16,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:04:16,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:04:16,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:04:16,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:04:16" (1/1) ... [2019-11-28 17:04:16,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28ec0670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:16, skipping insertion in model container [2019-11-28 17:04:16,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:04:16" (1/1) ... [2019-11-28 17:04:16,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:04:16,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:04:16,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:04:16,503 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:04:16,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:04:16,534 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:04:16,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:16 WrapperNode [2019-11-28 17:04:16,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:04:16,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:04:16,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:04:16,536 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:04:16,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:16" (1/1) ... [2019-11-28 17:04:16,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:16" (1/1) ... [2019-11-28 17:04:16,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:04:16,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:04:16,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:04:16,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:04:16,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:16" (1/1) ... [2019-11-28 17:04:16,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:16" (1/1) ... [2019-11-28 17:04:16,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:16" (1/1) ... [2019-11-28 17:04:16,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:16" (1/1) ... [2019-11-28 17:04:16,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:16" (1/1) ... [2019-11-28 17:04:16,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:16" (1/1) ... [2019-11-28 17:04:16,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:16" (1/1) ... [2019-11-28 17:04:16,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:04:16,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:04:16,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:04:16,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:04:16,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:16" (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 [2019-11-28 17:04:16,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:04:16,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:04:16,863 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:04:16,864 INFO L287 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-28 17:04:16,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:04:16 BoogieIcfgContainer [2019-11-28 17:04:16,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:04:16,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:04:16,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:04:16,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:04:16,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:04:16" (1/3) ... [2019-11-28 17:04:16,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5086fcd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:04:16, skipping insertion in model container [2019-11-28 17:04:16,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:16" (2/3) ... [2019-11-28 17:04:16,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5086fcd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:04:16, skipping insertion in model container [2019-11-28 17:04:16,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:04:16" (3/3) ... [2019-11-28 17:04:16,872 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2019-11-28 17:04:16,880 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:04:16,886 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-28 17:04:16,899 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-28 17:04:16,924 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:04:16,924 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:04:16,924 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:04:16,924 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:04:16,924 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:04:16,925 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:04:16,925 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:04:16,925 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:04:16,945 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-28 17:04:16,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-28 17:04:16,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:16,950 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-28 17:04:16,951 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:16,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:16,956 INFO L82 PathProgramCache]: Analyzing trace with hash 890491815, now seen corresponding path program 1 times [2019-11-28 17:04:16,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:16,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587945606] [2019-11-28 17:04:16,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:17,058 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 17:04:17,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587945606] [2019-11-28 17:04:17,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:04:17,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 17:04:17,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950716188] [2019-11-28 17:04:17,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 17:04:17,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:04:17,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 17:04:17,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 17:04:17,078 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2019-11-28 17:04:17,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:04:17,097 INFO L93 Difference]: Finished difference Result 22 states and 32 transitions. [2019-11-28 17:04:17,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 17:04:17,098 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-28 17:04:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:04:17,107 INFO L225 Difference]: With dead ends: 22 [2019-11-28 17:04:17,107 INFO L226 Difference]: Without dead ends: 8 [2019-11-28 17:04:17,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 17:04:17,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-28 17:04:17,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-28 17:04:17,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 17:04:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-28 17:04:17,139 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-11-28 17:04:17,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:04:17,139 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-28 17:04:17,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 17:04:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-28 17:04:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 17:04:17,140 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:17,140 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:04:17,141 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:17,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:17,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1810848111, now seen corresponding path program 1 times [2019-11-28 17:04:17,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:17,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654211686] [2019-11-28 17:04:17,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:04:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:04:17,177 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 17:04:17,177 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 17:04:17,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:04:17 BoogieIcfgContainer [2019-11-28 17:04:17,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:04:17,198 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:04:17,198 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:04:17,198 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:04:17,199 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:04:16" (3/4) ... [2019-11-28 17:04:17,201 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 17:04:17,239 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:04:17,240 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:04:17,242 INFO L168 Benchmark]: Toolchain (without parser) took 991.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -145.5 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:04:17,243 INFO L168 Benchmark]: CDTParser took 0.95 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 17:04:17,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.17 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:04:17,245 INFO L168 Benchmark]: Boogie Procedure Inliner took 98.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -195.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:04:17,246 INFO L168 Benchmark]: Boogie Preprocessor took 19.28 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 17:04:17,247 INFO L168 Benchmark]: RCFGBuilder took 210.74 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: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:04:17,248 INFO L168 Benchmark]: TraceAbstraction took 331.39 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: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. [2019-11-28 17:04:17,248 INFO L168 Benchmark]: Witness Printer took 42.10 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 17:04:17,253 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.95 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 284.17 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.2 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 98.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -195.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.28 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. * RCFGBuilder took 210.74 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: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 331.39 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: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. * Witness Printer took 42.10 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: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int x=0; VAL [x=0] [L24] COND TRUE 1 VAL [x=0] [L14] COND TRUE 1 [L15] x=1 VAL [x=1] [L4] COND TRUE !(cond) VAL [x=1] [L5] __VERIFIER_error() VAL [x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Result: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 8 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 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...