./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/BallRajamani-SPIN2000-Fig1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ccae6f392e1d87c0b193f39dee91a5c51306cb93 ......................................................................................................................................................................................................................................................................................................... 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 21:23:02,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 21:23:02,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 21:23:02,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 21:23:02,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 21:23:02,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 21:23:02,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 21:23:02,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 21:23:02,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 21:23:02,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 21:23:02,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 21:23:02,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 21:23:02,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 21:23:02,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 21:23:02,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 21:23:02,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 21:23:02,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 21:23:02,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 21:23:02,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 21:23:02,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 21:23:02,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 21:23:02,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 21:23:02,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 21:23:02,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 21:23:02,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 21:23:02,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 21:23:02,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 21:23:02,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 21:23:02,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 21:23:02,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 21:23:02,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 21:23:02,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 21:23:02,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 21:23:02,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 21:23:02,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 21:23:02,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 21:23:02,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 21:23:02,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 21:23:02,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 21:23:02,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 21:23:02,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 21:23:02,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 21:23:02,110 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 21:23:02,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 21:23:02,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 21:23:02,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 21:23:02,114 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 21:23:02,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 21:23:02,114 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 21:23:02,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 21:23:02,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 21:23:02,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 21:23:02,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 21:23:02,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 21:23:02,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 21:23:02,116 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 21:23:02,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 21:23:02,117 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 21:23:02,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 21:23:02,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 21:23:02,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 21:23:02,118 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 21:23:02,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 21:23:02,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 21:23:02,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 21:23:02,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 21:23:02,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 21:23:02,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 21:23:02,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 21:23:02,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 21:23:02,120 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 -> ccae6f392e1d87c0b193f39dee91a5c51306cb93 [2019-11-19 21:23:02,416 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 21:23:02,438 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 21:23:02,443 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 21:23:02,445 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 21:23:02,445 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 21:23:02,446 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2019-11-19 21:23:02,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d36856d77/1090b40710af446ebdf3ed62a13135a3/FLAG9f32e677a [2019-11-19 21:23:02,992 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 21:23:02,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2019-11-19 21:23:03,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d36856d77/1090b40710af446ebdf3ed62a13135a3/FLAG9f32e677a [2019-11-19 21:23:03,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d36856d77/1090b40710af446ebdf3ed62a13135a3 [2019-11-19 21:23:03,377 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 21:23:03,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 21:23:03,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 21:23:03,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 21:23:03,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 21:23:03,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:23:03" (1/1) ... [2019-11-19 21:23:03,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd276af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:03, skipping insertion in model container [2019-11-19 21:23:03,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:23:03" (1/1) ... [2019-11-19 21:23:03,395 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 21:23:03,413 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 21:23:03,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 21:23:03,592 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 21:23:03,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 21:23:03,616 INFO L192 MainTranslator]: Completed translation [2019-11-19 21:23:03,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:03 WrapperNode [2019-11-19 21:23:03,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 21:23:03,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 21:23:03,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 21:23:03,618 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 21:23:03,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:03" (1/1) ... [2019-11-19 21:23:03,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:03" (1/1) ... [2019-11-19 21:23:03,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 21:23:03,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 21:23:03,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 21:23:03,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 21:23:03,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:03" (1/1) ... [2019-11-19 21:23:03,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:03" (1/1) ... [2019-11-19 21:23:03,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:03" (1/1) ... [2019-11-19 21:23:03,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:03" (1/1) ... [2019-11-19 21:23:03,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:03" (1/1) ... [2019-11-19 21:23:03,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:03" (1/1) ... [2019-11-19 21:23:03,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:03" (1/1) ... [2019-11-19 21:23:03,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 21:23:03,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 21:23:03,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 21:23:03,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 21:23:03,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:03" (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 21:23:03,792 INFO L130 BoogieDeclarations]: Found specification of procedure A [2019-11-19 21:23:03,792 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2019-11-19 21:23:03,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 21:23:03,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 21:23:03,968 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 21:23:03,969 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-19 21:23:03,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:23:03 BoogieIcfgContainer [2019-11-19 21:23:03,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 21:23:03,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 21:23:03,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 21:23:03,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 21:23:03,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:23:03" (1/3) ... [2019-11-19 21:23:03,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b86e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:23:03, skipping insertion in model container [2019-11-19 21:23:03,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:23:03" (2/3) ... [2019-11-19 21:23:03,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b86e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:23:03, skipping insertion in model container [2019-11-19 21:23:03,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:23:03" (3/3) ... [2019-11-19 21:23:03,978 INFO L109 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2019-11-19 21:23:03,988 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 21:23:03,996 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 21:23:04,039 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 21:23:04,089 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 21:23:04,094 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 21:23:04,094 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 21:23:04,094 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 21:23:04,094 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 21:23:04,095 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 21:23:04,095 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 21:23:04,095 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 21:23:04,114 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-19 21:23:04,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 21:23:04,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:23:04,121 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:23:04,122 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:23:04,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:23:04,127 INFO L82 PathProgramCache]: Analyzing trace with hash -103722487, now seen corresponding path program 1 times [2019-11-19 21:23:04,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:23:04,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006746894] [2019-11-19 21:23:04,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:23:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:23:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:23:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:23:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 21:23:04,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006746894] [2019-11-19 21:23:04,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599789730] [2019-11-19 21:23:04,518 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 21:23:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:23:04,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 21:23:04,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:23:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 21:23:04,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:23:04,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-11-19 21:23:04,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583726398] [2019-11-19 21:23:04,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 21:23:04,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:23:04,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 21:23:04,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 21:23:04,652 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2019-11-19 21:23:04,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:23:04,817 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2019-11-19 21:23:04,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 21:23:04,820 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-19 21:23:04,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:23:04,835 INFO L225 Difference]: With dead ends: 39 [2019-11-19 21:23:04,835 INFO L226 Difference]: Without dead ends: 17 [2019-11-19 21:23:04,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-19 21:23:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-19 21:23:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-19 21:23:04,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-19 21:23:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-19 21:23:04,909 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2019-11-19 21:23:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:23:04,910 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-19 21:23:04,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 21:23:04,910 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-19 21:23:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-19 21:23:04,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:23:04,919 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:23:05,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:23:05,125 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:23:05,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:23:05,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1835094219, now seen corresponding path program 1 times [2019-11-19 21:23:05,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:23:05,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541903966] [2019-11-19 21:23:05,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:23:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 21:23:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 21:23:05,262 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 21:23:05,263 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 21:23:05,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 09:23:05 BoogieIcfgContainer [2019-11-19 21:23:05,307 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 21:23:05,307 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 21:23:05,308 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 21:23:05,308 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 21:23:05,309 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:23:03" (3/4) ... [2019-11-19 21:23:05,311 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 21:23:05,367 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 21:23:05,367 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 21:23:05,370 INFO L168 Benchmark]: Toolchain (without parser) took 1990.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -114.3 MB). Peak memory consumption was 37.8 MB. Max. memory is 11.5 GB. [2019-11-19 21:23:05,371 INFO L168 Benchmark]: CDTParser took 0.71 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 21:23:05,372 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.11 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 940.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-19 21:23:05,372 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -208.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-19 21:23:05,373 INFO L168 Benchmark]: Boogie Preprocessor took 19.90 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-19 21:23:05,374 INFO L168 Benchmark]: RCFGBuilder took 235.82 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: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2019-11-19 21:23:05,375 INFO L168 Benchmark]: TraceAbstraction took 1335.84 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: 64.6 MB). Peak memory consumption was 64.6 MB. Max. memory is 11.5 GB. [2019-11-19 21:23:05,375 INFO L168 Benchmark]: Witness Printer took 60.01 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. [2019-11-19 21:23:05,379 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.71 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 237.11 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 940.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 96.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -208.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.90 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 235.82 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: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1335.84 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: 64.6 MB). Peak memory consumption was 64.6 MB. Max. memory is 11.5 GB. * Witness Printer took 60.01 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: 31]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int g; VAL [g=0] [L26] int g = __VERIFIER_nondet_int(); [L27] int h = !g; VAL [g=0] [L28] CALL A(g,h) VAL [\old(a1)=1, \old(a2)=0, \old(g)=0, g=0] [L17] COND TRUE \read(a1) VAL [\old(a1)=1, \old(a2)=0, \old(g)=0, a1=1, a2=0, g=0] [L18] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=1, \old(g)=0, g=0] [L17] COND FALSE !(\read(a1)) [L20] g = a2 VAL [\old(a1)=0, \old(a2)=1, \old(g)=0, a1=0, a2=1, g=1] [L18] RET A(a2,a1) VAL [\old(a1)=1, \old(a2)=0, \old(g)=0, A(a2,a1)=0, a1=1, a2=0, g=1] [L28] RET A(g,h) VAL [g=1] [L29] CALL A(g,h) VAL [\old(a1)=1, \old(a2)=0, \old(g)=1, g=1] [L17] COND TRUE \read(a1) VAL [\old(a1)=1, \old(a2)=0, \old(g)=1, a1=1, a2=0, g=1] [L18] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=1, \old(g)=1, g=1] [L17] COND FALSE !(\read(a1)) [L20] g = a2 VAL [\old(a1)=0, \old(a2)=1, \old(g)=1, a1=0, a2=1, g=1] [L18] RET A(a2,a1) VAL [\old(a1)=1, \old(a2)=0, \old(g)=1, A(a2,a1)=0, a1=1, a2=0, g=1] [L29] RET A(g,h) VAL [g=1] [L30] COND TRUE \read(g) VAL [g=1] [L31] __VERIFIER_error() VAL [g=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 10 SDslu, 36 SDs, 0 SdLazy, 44 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 0.3s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 1650 SizeOfPredicates, 2 NumberOfNonLiveVariables, 54 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 2 InterpolantComputations, 0 PerfectInterpolantSequences, 2/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...