./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/for_bounded_loop1.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/for_bounded_loop1.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 1a0e89cb1a2148382c7546df46cfbb79c04a1e70 .................................................................................................................................................................................................................................................................................................................................................. 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 17:03:00,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:03:00,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:03:00,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:03:00,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:03:00,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:03:00,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:03:00,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:03:00,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:03:00,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:03:00,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:03:00,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:03:00,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:03:00,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:03:00,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:03:00,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:03:00,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:03:00,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:03:00,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:03:00,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:03:00,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:03:00,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:03:00,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:03:00,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:03:00,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:03:00,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:03:00,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:03:00,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:03:00,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:03:00,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:03:00,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:03:00,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:03:00,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:03:00,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:03:00,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:03:00,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:03:00,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:03:00,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:03:00,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:03:00,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:03:00,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:03:00,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:03:00,396 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:03:00,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:03:00,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:03:00,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:03:00,398 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:03:00,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:03:00,399 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:03:00,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:03:00,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:03:00,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:03:00,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:03:00,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:03:00,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:03:00,401 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:03:00,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:03:00,401 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:03:00,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:03:00,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:03:00,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:03:00,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:03:00,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:03:00,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:03:00,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:03:00,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:03:00,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:03:00,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:03:00,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:03:00,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:03:00,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:03:00,405 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 -> 1a0e89cb1a2148382c7546df46cfbb79c04a1e70 [2019-11-28 17:03:00,707 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:03:00,728 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:03:00,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:03:00,734 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:03:00,735 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:03:00,736 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/for_bounded_loop1.c [2019-11-28 17:03:00,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2684a90c/2e050b0b0ebb42dcb1bfb89208979fc8/FLAGb23e5e67e [2019-11-28 17:03:01,270 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:03:01,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/for_bounded_loop1.c [2019-11-28 17:03:01,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2684a90c/2e050b0b0ebb42dcb1bfb89208979fc8/FLAGb23e5e67e [2019-11-28 17:03:01,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2684a90c/2e050b0b0ebb42dcb1bfb89208979fc8 [2019-11-28 17:03:01,655 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:03:01,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:03:01,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:03:01,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:03:01,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:03:01,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:03:01" (1/1) ... [2019-11-28 17:03:01,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@503d68ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:01, skipping insertion in model container [2019-11-28 17:03:01,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:03:01" (1/1) ... [2019-11-28 17:03:01,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:03:01,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:03:01,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:03:01,920 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:03:01,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:03:01,959 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:03:01,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:01 WrapperNode [2019-11-28 17:03:01,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:03:01,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:03:01,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:03:01,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:03:01,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:01" (1/1) ... [2019-11-28 17:03:01,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:01" (1/1) ... [2019-11-28 17:03:02,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:03:02,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:03:02,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:03:02,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:03:02,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:01" (1/1) ... [2019-11-28 17:03:02,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:01" (1/1) ... [2019-11-28 17:03:02,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:01" (1/1) ... [2019-11-28 17:03:02,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:01" (1/1) ... [2019-11-28 17:03:02,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:01" (1/1) ... [2019-11-28 17:03:02,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:01" (1/1) ... [2019-11-28 17:03:02,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:01" (1/1) ... [2019-11-28 17:03:02,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:03:02,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:03:02,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:03:02,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:03:02,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:01" (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 17:03:02,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:03:02,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:03:02,335 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:03:02,335 INFO L287 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-28 17:03:02,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:03:02 BoogieIcfgContainer [2019-11-28 17:03:02,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:03:02,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:03:02,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:03:02,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:03:02,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:03:01" (1/3) ... [2019-11-28 17:03:02,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8c3f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:03:02, skipping insertion in model container [2019-11-28 17:03:02,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:01" (2/3) ... [2019-11-28 17:03:02,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8c3f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:03:02, skipping insertion in model container [2019-11-28 17:03:02,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:03:02" (3/3) ... [2019-11-28 17:03:02,344 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2019-11-28 17:03:02,354 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:03:02,361 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-28 17:03:02,373 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-28 17:03:02,398 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:03:02,399 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:03:02,399 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:03:02,399 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:03:02,399 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:03:02,401 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:03:02,401 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:03:02,401 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:03:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-28 17:03:02,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-28 17:03:02,419 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:02,420 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-28 17:03:02,420 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:02,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:02,425 INFO L82 PathProgramCache]: Analyzing trace with hash 29745418, now seen corresponding path program 1 times [2019-11-28 17:03:02,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:02,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288471155] [2019-11-28 17:03:02,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:02,626 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 17:03:02,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288471155] [2019-11-28 17:03:02,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:03:02,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 17:03:02,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951312280] [2019-11-28 17:03:02,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 17:03:02,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:02,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 17:03:02,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:03:02,657 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2019-11-28 17:03:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:02,771 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2019-11-28 17:03:02,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:03:02,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-28 17:03:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:02,783 INFO L225 Difference]: With dead ends: 48 [2019-11-28 17:03:02,783 INFO L226 Difference]: Without dead ends: 22 [2019-11-28 17:03:02,787 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:03:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-28 17:03:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2019-11-28 17:03:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 17:03:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-28 17:03:02,822 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 5 [2019-11-28 17:03:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:02,823 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-28 17:03:02,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 17:03:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-28 17:03:02,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-28 17:03:02,824 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:02,824 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-28 17:03:02,825 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:02,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:02,825 INFO L82 PathProgramCache]: Analyzing trace with hash 922077226, now seen corresponding path program 1 times [2019-11-28 17:03:02,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:02,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086536819] [2019-11-28 17:03:02,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:02,850 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 17:03:02,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086536819] [2019-11-28 17:03:02,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:03:02,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 17:03:02,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993002258] [2019-11-28 17:03:02,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 17:03:02,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:02,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 17:03:02,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 17:03:02,855 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2019-11-28 17:03:02,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:02,889 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-11-28 17:03:02,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 17:03:02,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-28 17:03:02,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:02,891 INFO L225 Difference]: With dead ends: 22 [2019-11-28 17:03:02,891 INFO L226 Difference]: Without dead ends: 18 [2019-11-28 17:03:02,892 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 17:03:02,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-28 17:03:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-28 17:03:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 17:03:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-28 17:03:02,897 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 6 [2019-11-28 17:03:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:02,898 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-28 17:03:02,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 17:03:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-28 17:03:02,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 17:03:02,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:02,899 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:02,899 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:02,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:02,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1387310901, now seen corresponding path program 1 times [2019-11-28 17:03:02,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:02,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502859466] [2019-11-28 17:03:02,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:03,069 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 17:03:03,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502859466] [2019-11-28 17:03:03,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:03:03,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:03:03,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999512159] [2019-11-28 17:03:03,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 17:03:03,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:03,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 17:03:03,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:03:03,077 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2019-11-28 17:03:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:03,185 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-28 17:03:03,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:03:03,186 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-11-28 17:03:03,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:03,187 INFO L225 Difference]: With dead ends: 19 [2019-11-28 17:03:03,187 INFO L226 Difference]: Without dead ends: 15 [2019-11-28 17:03:03,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:03:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-28 17:03:03,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2019-11-28 17:03:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-28 17:03:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-28 17:03:03,199 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2019-11-28 17:03:03,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:03,200 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-28 17:03:03,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 17:03:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-28 17:03:03,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 17:03:03,201 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:03,203 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:03,203 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:03,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:03,204 INFO L82 PathProgramCache]: Analyzing trace with hash 681382811, now seen corresponding path program 1 times [2019-11-28 17:03:03,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:03,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290060120] [2019-11-28 17:03:03,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:03:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:03:03,304 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 17:03:03,304 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 17:03:03,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:03:03 BoogieIcfgContainer [2019-11-28 17:03:03,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:03:03,329 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:03:03,329 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:03:03,329 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:03:03,330 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:03:02" (3/4) ... [2019-11-28 17:03:03,333 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 17:03:03,382 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:03:03,382 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:03:03,385 INFO L168 Benchmark]: Toolchain (without parser) took 1727.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 953.6 MB in the beginning and 1.1 GB in the end (delta: -113.6 MB). Peak memory consumption was 34.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:03,385 INFO L168 Benchmark]: CDTParser took 0.80 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 17:03:03,386 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.75 ms. Allocated memory is still 1.0 GB. Free memory was 953.6 MB in the beginning and 942.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:03,387 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 942.9 MB in the beginning and 1.1 GB in the end (delta: -202.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:03,388 INFO L168 Benchmark]: Boogie Preprocessor took 40.37 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: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:03,389 INFO L168 Benchmark]: RCFGBuilder took 243.19 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: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:03,390 INFO L168 Benchmark]: TraceAbstraction took 990.96 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: 58.8 MB). Peak memory consumption was 58.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:03,390 INFO L168 Benchmark]: Witness Printer took 53.68 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 17:03:03,394 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80 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 302.75 ms. Allocated memory is still 1.0 GB. Free memory was 953.6 MB in the beginning and 942.9 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 91.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 942.9 MB in the beginning and 1.1 GB in the end (delta: -202.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 40.37 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: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 243.19 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: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 990.96 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: 58.8 MB). Peak memory consumption was 58.8 MB. Max. memory is 11.5 GB. * Witness Printer took 53.68 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: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int i=0, x=0, y=0; [L15] int n=__VERIFIER_nondet_int(); [L16] COND FALSE !(!(n>0)) [L17] i=0 [L17] COND TRUE i