./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum01_bug02.i --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/sum01_bug02.i -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 c5465a084053aead702161d951dd339bfa1665d5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 17:03:54,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:03:54,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:03:54,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:03:54,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:03:54,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:03:54,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:03:54,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:03:54,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:03:54,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:03:54,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:03:54,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:03:54,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:03:54,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:03:54,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:03:54,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:03:54,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:03:54,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:03:54,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:03:54,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:03:54,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:03:54,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:03:54,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:03:54,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:03:54,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:03:54,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:03:54,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:03:54,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:03:54,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:03:54,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:03:54,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:03:54,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:03:54,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:03:54,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:03:54,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:03:54,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:03:54,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:03:54,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:03:54,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:03:54,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:03:54,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:03:54,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:03:54,534 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:03:54,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:03:54,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:03:54,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:03:54,538 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:03:54,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:03:54,539 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:03:54,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:03:54,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:03:54,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:03:54,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:03:54,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:03:54,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:03:54,542 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:03:54,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:03:54,543 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:03:54,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:03:54,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:03:54,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:03:54,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:03:54,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:03:54,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:03:54,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:03:54,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:03:54,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:03:54,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:03:54,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:03:54,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:03:54,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:03:54,546 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 -> c5465a084053aead702161d951dd339bfa1665d5 [2019-11-28 17:03:54,871 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:03:54,890 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:03:54,893 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:03:54,895 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:03:54,896 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:03:54,897 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01_bug02.i [2019-11-28 17:03:54,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfefc7dd1/6ee63e8b45a14a16acfb6f8eb8dc48a7/FLAG69fc5f92f [2019-11-28 17:03:55,487 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:03:55,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02.i [2019-11-28 17:03:55,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfefc7dd1/6ee63e8b45a14a16acfb6f8eb8dc48a7/FLAG69fc5f92f [2019-11-28 17:03:55,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfefc7dd1/6ee63e8b45a14a16acfb6f8eb8dc48a7 [2019-11-28 17:03:55,896 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:03:55,898 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:03:55,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:03:55,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:03:55,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:03:55,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:03:55" (1/1) ... [2019-11-28 17:03:55,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53155a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:55, skipping insertion in model container [2019-11-28 17:03:55,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:03:55" (1/1) ... [2019-11-28 17:03:55,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:03:55,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:03:56,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:03:56,130 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:03:56,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:03:56,154 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:03:56,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:56 WrapperNode [2019-11-28 17:03:56,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:03:56,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:03:56,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:03:56,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:03:56,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:56" (1/1) ... [2019-11-28 17:03:56,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:56" (1/1) ... [2019-11-28 17:03:56,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:03:56,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:03:56,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:03:56,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:03:56,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:56" (1/1) ... [2019-11-28 17:03:56,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:56" (1/1) ... [2019-11-28 17:03:56,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:56" (1/1) ... [2019-11-28 17:03:56,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:56" (1/1) ... [2019-11-28 17:03:56,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:56" (1/1) ... [2019-11-28 17:03:56,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:56" (1/1) ... [2019-11-28 17:03:56,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:56" (1/1) ... [2019-11-28 17:03:56,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:03:56,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:03:56,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:03:56,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:03:56,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:56" (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 17:03:56,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:03:56,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:03:56,489 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:03:56,489 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-28 17:03:56,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:03:56 BoogieIcfgContainer [2019-11-28 17:03:56,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:03:56,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:03:56,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:03:56,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:03:56,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:03:55" (1/3) ... [2019-11-28 17:03:56,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e26e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:03:56, skipping insertion in model container [2019-11-28 17:03:56,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:56" (2/3) ... [2019-11-28 17:03:56,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e26e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:03:56, skipping insertion in model container [2019-11-28 17:03:56,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:03:56" (3/3) ... [2019-11-28 17:03:56,499 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2019-11-28 17:03:56,509 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:03:56,516 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:03:56,529 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:03:56,555 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:03:56,555 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:03:56,555 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:03:56,555 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:03:56,556 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:03:56,556 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:03:56,556 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:03:56,556 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:03:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-28 17:03:56,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-28 17:03:56,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:56,577 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-28 17:03:56,577 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:56,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:56,582 INFO L82 PathProgramCache]: Analyzing trace with hash 30170436, now seen corresponding path program 1 times [2019-11-28 17:03:56,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:56,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782937241] [2019-11-28 17:03:56,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:56,711 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 17:03:56,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782937241] [2019-11-28 17:03:56,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:03:56,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 17:03:56,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311439665] [2019-11-28 17:03:56,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 17:03:56,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:56,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 17:03:56,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 17:03:56,740 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-11-28 17:03:56,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:56,759 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-11-28 17:03:56,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 17:03:56,760 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-28 17:03:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:56,771 INFO L225 Difference]: With dead ends: 19 [2019-11-28 17:03:56,772 INFO L226 Difference]: Without dead ends: 9 [2019-11-28 17:03:56,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 17:03:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-28 17:03:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-28 17:03:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-28 17:03:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-28 17:03:56,818 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-11-28 17:03:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:56,818 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-28 17:03:56,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 17:03:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-28 17:03:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-28 17:03:56,820 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:56,820 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-28 17:03:56,820 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:56,821 INFO L82 PathProgramCache]: Analyzing trace with hash 29783153, now seen corresponding path program 1 times [2019-11-28 17:03:56,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:56,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385463108] [2019-11-28 17:03:56,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:56,971 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 17:03:56,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385463108] [2019-11-28 17:03:56,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:03:56,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 17:03:56,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397089694] [2019-11-28 17:03:56,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 17:03:56,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:56,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 17:03:56,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:03:56,977 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-11-28 17:03:57,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:57,040 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2019-11-28 17:03:57,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 17:03:57,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-28 17:03:57,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:57,042 INFO L225 Difference]: With dead ends: 17 [2019-11-28 17:03:57,042 INFO L226 Difference]: Without dead ends: 13 [2019-11-28 17:03:57,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:03:57,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-28 17:03:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-28 17:03:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-28 17:03:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-28 17:03:57,049 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 5 [2019-11-28 17:03:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:57,049 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-28 17:03:57,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 17:03:57,050 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-28 17:03:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:03:57,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:57,051 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:57,051 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:57,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:57,052 INFO L82 PathProgramCache]: Analyzing trace with hash -963514282, now seen corresponding path program 1 times [2019-11-28 17:03:57,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:57,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410648373] [2019-11-28 17:03:57,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:57,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410648373] [2019-11-28 17:03:57,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475249856] [2019-11-28 17:03:57,359 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 [2019-11-28 17:03:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:57,407 WARN L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 17:03:57,413 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:03:57,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 17:03:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:57,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:03:57,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-11-28 17:03:57,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391571769] [2019-11-28 17:03:57,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 17:03:57,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:57,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 17:03:57,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:03:57,582 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 14 states. [2019-11-28 17:03:57,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:57,903 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-28 17:03:57,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 17:03:57,905 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 9 [2019-11-28 17:03:57,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:57,907 INFO L225 Difference]: With dead ends: 35 [2019-11-28 17:03:57,908 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 17:03:57,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-11-28 17:03:57,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 17:03:57,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-11-28 17:03:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-28 17:03:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-28 17:03:57,925 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2019-11-28 17:03:57,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:57,927 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-28 17:03:57,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 17:03:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-28 17:03:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 17:03:57,928 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:57,929 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:58,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:58,134 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:58,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:58,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1771006013, now seen corresponding path program 1 times [2019-11-28 17:03:58,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:58,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153342057] [2019-11-28 17:03:58,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:58,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153342057] [2019-11-28 17:03:58,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098074961] [2019-11-28 17:03:58,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-28 17:03:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:58,229 INFO L264 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 17:03:58,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:03:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:58,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:03:58,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2019-11-28 17:03:58,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774739705] [2019-11-28 17:03:58,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:03:58,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:58,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:03:58,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:03:58,289 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2019-11-28 17:03:58,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:58,342 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-11-28 17:03:58,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:03:58,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-28 17:03:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:58,344 INFO L225 Difference]: With dead ends: 30 [2019-11-28 17:03:58,344 INFO L226 Difference]: Without dead ends: 18 [2019-11-28 17:03:58,345 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:03:58,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-28 17:03:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-28 17:03:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 17:03:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-28 17:03:58,356 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-11-28 17:03:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:58,357 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-28 17:03:58,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:03:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-28 17:03:58,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 17:03:58,362 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:58,362 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1] [2019-11-28 17:03:58,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:58,564 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:58,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1276819616, now seen corresponding path program 2 times [2019-11-28 17:03:58,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:58,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751962622] [2019-11-28 17:03:58,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 17:03:58,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751962622] [2019-11-28 17:03:58,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566872758] [2019-11-28 17:03:58,796 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:58,830 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:03:58,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:03:58,832 WARN L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-28 17:03:58,834 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:03:59,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 17:03:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:59,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:03:59,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2019-11-28 17:03:59,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988559452] [2019-11-28 17:03:59,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-28 17:03:59,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:59,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-28 17:03:59,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-11-28 17:03:59,057 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 19 states. [2019-11-28 17:03:59,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:59,634 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-11-28 17:03:59,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-28 17:03:59,635 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 17 [2019-11-28 17:03:59,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:59,636 INFO L225 Difference]: With dead ends: 39 [2019-11-28 17:03:59,636 INFO L226 Difference]: Without dead ends: 33 [2019-11-28 17:03:59,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2019-11-28 17:03:59,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-28 17:03:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 19. [2019-11-28 17:03:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 17:03:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-28 17:03:59,642 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2019-11-28 17:03:59,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:59,642 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-28 17:03:59,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-28 17:03:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-28 17:03:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 17:03:59,643 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:59,643 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:59,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:59,848 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:59,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1243140318, now seen corresponding path program 2 times [2019-11-28 17:03:59,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:59,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705104882] [2019-11-28 17:03:59,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:59,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705104882] [2019-11-28 17:03:59,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775935675] [2019-11-28 17:03:59,932 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:59,962 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:03:59,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:03:59,963 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 17:03:59,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:04:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:00,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:04:00,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-28 17:04:00,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682714564] [2019-11-28 17:04:00,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 17:04:00,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:04:00,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 17:04:00,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:04:00,026 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 12 states. [2019-11-28 17:04:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:04:00,087 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-28 17:04:00,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:04:00,092 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-28 17:04:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:04:00,093 INFO L225 Difference]: With dead ends: 32 [2019-11-28 17:04:00,093 INFO L226 Difference]: Without dead ends: 24 [2019-11-28 17:04:00,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:04:00,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-28 17:04:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-28 17:04:00,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 17:04:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-28 17:04:00,100 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2019-11-28 17:04:00,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:04:00,100 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-28 17:04:00,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 17:04:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-28 17:04:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 17:04:00,102 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:00,102 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2019-11-28 17:04:00,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:00,307 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:00,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:00,308 INFO L82 PathProgramCache]: Analyzing trace with hash -242812025, now seen corresponding path program 3 times [2019-11-28 17:04:00,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:00,308 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177669745] [2019-11-28 17:04:00,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:00,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177669745] [2019-11-28 17:04:00,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318029811] [2019-11-28 17:04:00,385 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:00,423 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-28 17:04:00,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:04:00,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 17:04:00,437 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:04:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:00,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:04:00,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-28 17:04:00,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523560666] [2019-11-28 17:04:00,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 17:04:00,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:04:00,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 17:04:00,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2019-11-28 17:04:00,524 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 16 states. [2019-11-28 17:04:00,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:04:00,599 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-11-28 17:04:00,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 17:04:00,600 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2019-11-28 17:04:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:04:00,601 INFO L225 Difference]: With dead ends: 36 [2019-11-28 17:04:00,601 INFO L226 Difference]: Without dead ends: 28 [2019-11-28 17:04:00,602 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2019-11-28 17:04:00,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-28 17:04:00,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-28 17:04:00,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-28 17:04:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-28 17:04:00,606 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2019-11-28 17:04:00,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:04:00,607 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-28 17:04:00,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 17:04:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-28 17:04:00,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-28 17:04:00,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:00,608 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2019-11-28 17:04:00,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:00,817 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:00,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:00,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2047865492, now seen corresponding path program 4 times [2019-11-28 17:04:00,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:00,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789079185] [2019-11-28 17:04:00,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:00,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789079185] [2019-11-28 17:04:00,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695544568] [2019-11-28 17:04:00,915 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:00,955 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:04:00,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:04:00,956 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 17:04:00,957 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:04:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:01,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:04:01,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2019-11-28 17:04:01,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634907952] [2019-11-28 17:04:01,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-28 17:04:01,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:04:01,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 17:04:01,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:04:01,056 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 20 states. [2019-11-28 17:04:01,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:04:01,152 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2019-11-28 17:04:01,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 17:04:01,153 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2019-11-28 17:04:01,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:04:01,154 INFO L225 Difference]: With dead ends: 41 [2019-11-28 17:04:01,154 INFO L226 Difference]: Without dead ends: 33 [2019-11-28 17:04:01,155 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:04:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-28 17:04:01,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-11-28 17:04:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-28 17:04:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-11-28 17:04:01,161 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2019-11-28 17:04:01,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:04:01,161 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-11-28 17:04:01,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-28 17:04:01,161 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-11-28 17:04:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-28 17:04:01,162 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:01,162 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2019-11-28 17:04:01,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:01,373 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:01,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:01,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1174166319, now seen corresponding path program 5 times [2019-11-28 17:04:01,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:01,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552373691] [2019-11-28 17:04:01,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:04:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:04:01,444 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 17:04:01,444 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 17:04:01,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:04:01 BoogieIcfgContainer [2019-11-28 17:04:01,477 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:04:01,477 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:04:01,477 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:04:01,478 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:04:01,478 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:03:56" (3/4) ... [2019-11-28 17:04:01,481 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 17:04:01,583 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:04:01,583 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:04:01,593 INFO L168 Benchmark]: Toolchain (without parser) took 5692.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 208.1 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -149.0 MB). Peak memory consumption was 59.2 MB. Max. memory is 11.5 GB. [2019-11-28 17:04:01,594 INFO L168 Benchmark]: CDTParser took 0.76 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:04:01,594 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.47 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:04:01,595 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -193.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:04:01,595 INFO L168 Benchmark]: Boogie Preprocessor took 20.51 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: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-28 17:04:01,596 INFO L168 Benchmark]: RCFGBuilder took 227.40 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. [2019-11-28 17:04:01,600 INFO L168 Benchmark]: TraceAbstraction took 4985.54 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 76.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:04:01,600 INFO L168 Benchmark]: Witness Printer took 105.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:04:01,609 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.76 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 256.47 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 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 86.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -193.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.51 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: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 227.40 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 4985.54 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 76.8 MB. Max. memory is 11.5 GB. * Witness Printer took 105.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i