./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_o3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 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/recursive-simple/id_o3.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 9b6c190b845f4496788acb9553cb85e1e7dace14 ............................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-678e011 [2019-11-19 21:23:18,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 21:23:18,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 21:23:18,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 21:23:18,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 21:23:18,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 21:23:18,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 21:23:18,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 21:23:18,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 21:23:18,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 21:23:18,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 21:23:18,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 21:23:18,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 21:23:18,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 21:23:18,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 21:23:18,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 21:23:18,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 21:23:18,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 21:23:18,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 21:23:18,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 21:23:18,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 21:23:18,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 21:23:18,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 21:23:18,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 21:23:18,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 21:23:18,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 21:23:18,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 21:23:18,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 21:23:18,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 21:23:18,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 21:23:18,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 21:23:18,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 21:23:18,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 21:23:18,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 21:23:18,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 21:23:18,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 21:23:18,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 21:23:18,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 21:23:18,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 21:23:18,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 21:23:18,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 21:23:18,923 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 21:23:18,947 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 21:23:18,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 21:23:18,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 21:23:18,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 21:23:18,951 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 21:23:18,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 21:23:18,952 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 21:23:18,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 21:23:18,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 21:23:18,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 21:23:18,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 21:23:18,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 21:23:18,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 21:23:18,955 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 21:23:18,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 21:23:18,955 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 21:23:18,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 21:23:18,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 21:23:18,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 21:23:18,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 21:23:18,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 21:23:18,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 21:23:18,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 21:23:18,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 21:23:18,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 21:23:18,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 21:23:18,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 21:23:18,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 21:23:18,958 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 -> 9b6c190b845f4496788acb9553cb85e1e7dace14 [2019-11-19 21:23:19,276 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 21:23:19,297 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 21:23:19,303 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 21:23:19,305 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 21:23:19,305 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 21:23:19,306 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o3.c [2019-11-19 21:23:19,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/471174edf/c5390069f4df48ce9d10fbcd3b4775a0/FLAGf1145c0d8 [2019-11-19 21:23:19,809 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 21:23:19,810 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o3.c [2019-11-19 21:23:19,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/471174edf/c5390069f4df48ce9d10fbcd3b4775a0/FLAGf1145c0d8 [2019-11-19 21:23:20,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/471174edf/c5390069f4df48ce9d10fbcd3b4775a0 [2019-11-19 21:23:20,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 21:23:20,222 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 21:23:20,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 21:23:20,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 21:23:20,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 21:23:20,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:23:20" (1/1) ... [2019-11-19 21:23:20,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@371ed624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:20, skipping insertion in model container [2019-11-19 21:23:20,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:23:20" (1/1) ... [2019-11-19 21:23:20,240 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 21:23:20,262 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 21:23:20,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 21:23:20,457 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 21:23:20,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 21:23:20,482 INFO L192 MainTranslator]: Completed translation [2019-11-19 21:23:20,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:20 WrapperNode [2019-11-19 21:23:20,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 21:23:20,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 21:23:20,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 21:23:20,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 21:23:20,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:20" (1/1) ... [2019-11-19 21:23:20,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:20" (1/1) ... [2019-11-19 21:23:20,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 21:23:20,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 21:23:20,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 21:23:20,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 21:23:20,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:20" (1/1) ... [2019-11-19 21:23:20,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:20" (1/1) ... [2019-11-19 21:23:20,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:20" (1/1) ... [2019-11-19 21:23:20,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:20" (1/1) ... [2019-11-19 21:23:20,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:20" (1/1) ... [2019-11-19 21:23:20,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:20" (1/1) ... [2019-11-19 21:23:20,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:20" (1/1) ... [2019-11-19 21:23:20,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 21:23:20,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 21:23:20,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 21:23:20,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 21:23:20,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:20" (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 [2019-11-19 21:23:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 21:23:20,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 21:23:20,652 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-19 21:23:20,653 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-19 21:23:20,800 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 21:23:20,801 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-19 21:23:20,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:23:20 BoogieIcfgContainer [2019-11-19 21:23:20,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 21:23:20,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 21:23:20,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 21:23:20,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 21:23:20,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:23:20" (1/3) ... [2019-11-19 21:23:20,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec8277c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:23:20, skipping insertion in model container [2019-11-19 21:23:20,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:20" (2/3) ... [2019-11-19 21:23:20,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec8277c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:23:20, skipping insertion in model container [2019-11-19 21:23:20,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:23:20" (3/3) ... [2019-11-19 21:23:20,811 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o3.c [2019-11-19 21:23:20,818 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 21:23:20,824 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 21:23:20,834 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 21:23:20,857 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 21:23:20,858 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 21:23:20,858 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 21:23:20,858 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 21:23:20,858 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 21:23:20,858 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 21:23:20,858 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 21:23:20,858 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 21:23:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-19 21:23:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-19 21:23:20,880 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:23:20,881 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:23:20,881 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:23:20,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:23:20,886 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-19 21:23:20,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:23:20,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510098906] [2019-11-19 21:23:20,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:23:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:23:21,261 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-11-19 21:23:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:23:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:23:21,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510098906] [2019-11-19 21:23:21,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:23:21,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 21:23:21,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421985960] [2019-11-19 21:23:21,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 21:23:21,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:23:21,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 21:23:21,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-19 21:23:21,363 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-19 21:23:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:23:21,416 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-11-19 21:23:21,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 21:23:21,418 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-19 21:23:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:23:21,427 INFO L225 Difference]: With dead ends: 27 [2019-11-19 21:23:21,427 INFO L226 Difference]: Without dead ends: 14 [2019-11-19 21:23:21,430 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-19 21:23:21,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-19 21:23:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-19 21:23:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-19 21:23:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-19 21:23:21,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-19 21:23:21,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:23:21,467 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-19 21:23:21,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 21:23:21,468 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-19 21:23:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-19 21:23:21,469 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:23:21,470 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:23:21,470 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:23:21,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:23:21,470 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-19 21:23:21,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:23:21,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688063069] [2019-11-19 21:23:21,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:23:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:23:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:23:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:23:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 21:23:21,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688063069] [2019-11-19 21:23:21,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199039375] [2019-11-19 21:23:21,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:23:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:23:21,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-19 21:23:21,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:23:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 21:23:21,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:23:21,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-19 21:23:21,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887346133] [2019-11-19 21:23:21,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 21:23:21,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:23:21,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 21:23:21,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-19 21:23:21,804 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-11-19 21:23:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:23:21,844 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-19 21:23:21,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 21:23:21,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-19 21:23:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:23:21,846 INFO L225 Difference]: With dead ends: 21 [2019-11-19 21:23:21,846 INFO L226 Difference]: Without dead ends: 17 [2019-11-19 21:23:21,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-19 21:23:21,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-19 21:23:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-19 21:23:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-19 21:23:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-19 21:23:21,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-19 21:23:21,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:23:21,853 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-19 21:23:21,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 21:23:21,853 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-19 21:23:21,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-19 21:23:21,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:23:21,857 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:23:22,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:23:22,064 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:23:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:23:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-19 21:23:22,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:23:22,066 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669404787] [2019-11-19 21:23:22,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:23:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:23:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:23:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:23:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:23:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-19 21:23:22,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669404787] [2019-11-19 21:23:22,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729061690] [2019-11-19 21:23:22,373 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:23:22,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 21:23:22,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:23:22,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-19 21:23:22,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:23:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-19 21:23:22,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:23:22,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-19 21:23:22,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177072840] [2019-11-19 21:23:22,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 21:23:22,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:23:22,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 21:23:22,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-19 21:23:22,467 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-11-19 21:23:22,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:23:22,535 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-19 21:23:22,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 21:23:22,537 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-19 21:23:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:23:22,538 INFO L225 Difference]: With dead ends: 24 [2019-11-19 21:23:22,538 INFO L226 Difference]: Without dead ends: 20 [2019-11-19 21:23:22,539 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-19 21:23:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-19 21:23:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-19 21:23:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-19 21:23:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-19 21:23:22,553 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-19 21:23:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:23:22,553 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-19 21:23:22,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 21:23:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-19 21:23:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-19 21:23:22,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:23:22,558 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:23:22,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:23:22,762 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:23:22,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:23:22,763 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-19 21:23:22,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:23:22,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789370887] [2019-11-19 21:23:22,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:23:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 21:23:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 21:23:22,820 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 21:23:22,821 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 21:23:22,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 09:23:22 BoogieIcfgContainer [2019-11-19 21:23:22,853 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 21:23:22,853 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 21:23:22,853 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 21:23:22,853 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 21:23:22,854 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:23:20" (3/4) ... [2019-11-19 21:23:22,856 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 21:23:22,899 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 21:23:22,900 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 21:23:22,901 INFO L168 Benchmark]: Toolchain (without parser) took 2679.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 955.0 MB in the beginning and 1.0 GB in the end (delta: -66.5 MB). Peak memory consumption was 74.0 MB. Max. memory is 11.5 GB. [2019-11-19 21:23:22,902 INFO L168 Benchmark]: CDTParser took 0.23 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. [2019-11-19 21:23:22,903 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.26 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. [2019-11-19 21:23:22,903 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.76 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 21:23:22,904 INFO L168 Benchmark]: Boogie Preprocessor took 77.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -192.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-19 21:23:22,905 INFO L168 Benchmark]: RCFGBuilder took 207.51 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. [2019-11-19 21:23:22,906 INFO L168 Benchmark]: TraceAbstraction took 2049.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 11.5 GB. [2019-11-19 21:23:22,906 INFO L168 Benchmark]: Witness Printer took 46.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 21:23:22,911 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 260.26 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 33.76 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 77.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -192.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 207.51 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 2049.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 11.5 GB. * Witness Printer took 46.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 3 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.9s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 3 SDslu, 207 SDs, 0 SdLazy, 69 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=3, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 5160 SizeOfPredicates, 2 NumberOfNonLiveVariables, 80 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 18/36 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...