./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ssh-simplified/s3_srvr_1b.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab 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/ssh-simplified/s3_srvr_1b.cil.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 7cac24a49d7b473be85039a3051680fd486b81b3 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-27 22:35:45,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 22:35:45,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 22:35:45,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 22:35:45,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 22:35:45,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 22:35:45,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 22:35:45,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 22:35:45,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 22:35:45,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 22:35:45,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 22:35:45,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 22:35:45,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 22:35:45,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 22:35:45,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 22:35:45,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 22:35:45,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 22:35:45,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 22:35:45,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 22:35:45,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 22:35:45,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 22:35:45,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 22:35:45,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 22:35:45,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 22:35:45,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 22:35:45,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 22:35:45,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 22:35:45,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 22:35:45,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 22:35:45,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 22:35:45,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 22:35:45,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 22:35:45,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 22:35:45,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 22:35:45,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 22:35:45,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 22:35:45,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 22:35:45,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 22:35:45,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 22:35:45,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 22:35:45,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 22:35:45,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 22:35:45,528 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 22:35:45,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 22:35:45,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 22:35:45,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 22:35:45,531 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 22:35:45,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 22:35:45,531 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 22:35:45,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 22:35:45,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 22:35:45,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 22:35:45,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 22:35:45,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 22:35:45,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 22:35:45,533 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 22:35:45,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 22:35:45,534 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 22:35:45,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 22:35:45,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 22:35:45,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 22:35:45,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 22:35:45,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 22:35:45,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 22:35:45,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 22:35:45,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 22:35:45,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 22:35:45,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 22:35:45,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 22:35:45,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 22:35:45,538 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 -> 7cac24a49d7b473be85039a3051680fd486b81b3 [2019-11-27 22:35:45,831 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 22:35:45,843 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 22:35:45,846 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 22:35:45,848 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 22:35:45,848 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 22:35:45,849 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ssh-simplified/s3_srvr_1b.cil.c [2019-11-27 22:35:45,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ac868ab/b0dc9b8c438841d3924343635e19e5e6/FLAG28076e02a [2019-11-27 22:35:46,323 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 22:35:46,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ssh-simplified/s3_srvr_1b.cil.c [2019-11-27 22:35:46,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ac868ab/b0dc9b8c438841d3924343635e19e5e6/FLAG28076e02a [2019-11-27 22:35:46,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ac868ab/b0dc9b8c438841d3924343635e19e5e6 [2019-11-27 22:35:46,739 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 22:35:46,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 22:35:46,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 22:35:46,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 22:35:46,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 22:35:46,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 10:35:46" (1/1) ... [2019-11-27 22:35:46,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bb42088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:35:46, skipping insertion in model container [2019-11-27 22:35:46,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 10:35:46" (1/1) ... [2019-11-27 22:35:46,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 22:35:46,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 22:35:46,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 22:35:46,980 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 22:35:47,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 22:35:47,024 INFO L208 MainTranslator]: Completed translation [2019-11-27 22:35:47,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:35:47 WrapperNode [2019-11-27 22:35:47,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 22:35:47,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 22:35:47,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 22:35:47,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 22:35:47,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:35:47" (1/1) ... [2019-11-27 22:35:47,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:35:47" (1/1) ... [2019-11-27 22:35:47,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 22:35:47,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 22:35:47,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 22:35:47,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 22:35:47,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:35:47" (1/1) ... [2019-11-27 22:35:47,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:35:47" (1/1) ... [2019-11-27 22:35:47,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:35:47" (1/1) ... [2019-11-27 22:35:47,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:35:47" (1/1) ... [2019-11-27 22:35:47,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:35:47" (1/1) ... [2019-11-27 22:35:47,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:35:47" (1/1) ... [2019-11-27 22:35:47,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:35:47" (1/1) ... [2019-11-27 22:35:47,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 22:35:47,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 22:35:47,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 22:35:47,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 22:35:47,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:35:47" (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 [2019-11-27 22:35:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 22:35:47,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 22:35:47,481 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 22:35:47,481 INFO L297 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-27 22:35:47,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:35:47 BoogieIcfgContainer [2019-11-27 22:35:47,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 22:35:47,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 22:35:47,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 22:35:47,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 22:35:47,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 10:35:46" (1/3) ... [2019-11-27 22:35:47,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a81e6b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 10:35:47, skipping insertion in model container [2019-11-27 22:35:47,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:35:47" (2/3) ... [2019-11-27 22:35:47,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a81e6b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 10:35:47, skipping insertion in model container [2019-11-27 22:35:47,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:35:47" (3/3) ... [2019-11-27 22:35:47,505 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2019-11-27 22:35:47,527 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 22:35:47,542 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 22:35:47,564 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 22:35:47,587 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 22:35:47,588 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 22:35:47,588 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 22:35:47,588 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 22:35:47,588 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 22:35:47,588 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 22:35:47,588 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 22:35:47,589 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 22:35:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-27 22:35:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-27 22:35:47,609 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:35:47,610 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-27 22:35:47,610 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:35:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:35:47,614 INFO L82 PathProgramCache]: Analyzing trace with hash 963424, now seen corresponding path program 1 times [2019-11-27 22:35:47,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:35:47,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533304140] [2019-11-27 22:35:47,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:35:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:35:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 22:35:47,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533304140] [2019-11-27 22:35:47,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:35:47,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 22:35:47,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690646248] [2019-11-27 22:35:47,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:35:47,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:35:47,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:35:47,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:35:47,784 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-27 22:35:47,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:35:47,934 INFO L93 Difference]: Finished difference Result 65 states and 110 transitions. [2019-11-27 22:35:47,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:35:47,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-27 22:35:47,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:35:47,950 INFO L225 Difference]: With dead ends: 65 [2019-11-27 22:35:47,951 INFO L226 Difference]: Without dead ends: 35 [2019-11-27 22:35:47,958 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:35:47,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-27 22:35:47,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-27 22:35:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-27 22:35:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 51 transitions. [2019-11-27 22:35:48,003 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 51 transitions. Word has length 4 [2019-11-27 22:35:48,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:35:48,003 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 51 transitions. [2019-11-27 22:35:48,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:35:48,003 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 51 transitions. [2019-11-27 22:35:48,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-27 22:35:48,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:35:48,004 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:35:48,005 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:35:48,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:35:48,005 INFO L82 PathProgramCache]: Analyzing trace with hash -775387731, now seen corresponding path program 1 times [2019-11-27 22:35:48,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:35:48,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722774272] [2019-11-27 22:35:48,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:35:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:35:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 22:35:48,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722774272] [2019-11-27 22:35:48,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:35:48,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:35:48,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862102377] [2019-11-27 22:35:48,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:35:48,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:35:48,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:35:48,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:35:48,035 INFO L87 Difference]: Start difference. First operand 35 states and 51 transitions. Second operand 3 states. [2019-11-27 22:35:48,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:35:48,097 INFO L93 Difference]: Finished difference Result 83 states and 121 transitions. [2019-11-27 22:35:48,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:35:48,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-27 22:35:48,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:35:48,099 INFO L225 Difference]: With dead ends: 83 [2019-11-27 22:35:48,100 INFO L226 Difference]: Without dead ends: 49 [2019-11-27 22:35:48,101 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 [2019-11-27 22:35:48,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-27 22:35:48,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2019-11-27 22:35:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-27 22:35:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2019-11-27 22:35:48,112 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 9 [2019-11-27 22:35:48,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:35:48,112 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2019-11-27 22:35:48,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:35:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2019-11-27 22:35:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-27 22:35:48,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:35:48,114 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:35:48,114 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:35:48,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:35:48,115 INFO L82 PathProgramCache]: Analyzing trace with hash -775328149, now seen corresponding path program 1 times [2019-11-27 22:35:48,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:35:48,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748587370] [2019-11-27 22:35:48,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:35:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:35:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 22:35:48,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748587370] [2019-11-27 22:35:48,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:35:48,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:35:48,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134404673] [2019-11-27 22:35:48,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:35:48,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:35:48,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:35:48,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:35:48,147 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 3 states. [2019-11-27 22:35:48,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:35:48,209 INFO L93 Difference]: Finished difference Result 89 states and 126 transitions. [2019-11-27 22:35:48,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:35:48,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-27 22:35:48,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:35:48,211 INFO L225 Difference]: With dead ends: 89 [2019-11-27 22:35:48,211 INFO L226 Difference]: Without dead ends: 66 [2019-11-27 22:35:48,212 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 [2019-11-27 22:35:48,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-27 22:35:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-11-27 22:35:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-27 22:35:48,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2019-11-27 22:35:48,226 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 9 [2019-11-27 22:35:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:35:48,226 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2019-11-27 22:35:48,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:35:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2019-11-27 22:35:48,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-27 22:35:48,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:35:48,230 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:35:48,230 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:35:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:35:48,233 INFO L82 PathProgramCache]: Analyzing trace with hash -966830088, now seen corresponding path program 1 times [2019-11-27 22:35:48,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:35:48,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643672403] [2019-11-27 22:35:48,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:35:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:35:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-27 22:35:48,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643672403] [2019-11-27 22:35:48,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:35:48,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:35:48,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455834571] [2019-11-27 22:35:48,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:35:48,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:35:48,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:35:48,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:35:48,294 INFO L87 Difference]: Start difference. First operand 66 states and 89 transitions. Second operand 3 states. [2019-11-27 22:35:48,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:35:48,381 INFO L93 Difference]: Finished difference Result 133 states and 183 transitions. [2019-11-27 22:35:48,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:35:48,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-27 22:35:48,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:35:48,384 INFO L225 Difference]: With dead ends: 133 [2019-11-27 22:35:48,384 INFO L226 Difference]: Without dead ends: 89 [2019-11-27 22:35:48,387 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 [2019-11-27 22:35:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-27 22:35:48,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-11-27 22:35:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-27 22:35:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2019-11-27 22:35:48,412 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 16 [2019-11-27 22:35:48,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:35:48,413 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2019-11-27 22:35:48,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:35:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2019-11-27 22:35:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-27 22:35:48,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:35:48,415 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:35:48,416 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:35:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:35:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash -782905388, now seen corresponding path program 1 times [2019-11-27 22:35:48,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:35:48,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157645086] [2019-11-27 22:35:48,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:35:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:35:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-27 22:35:48,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157645086] [2019-11-27 22:35:48,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:35:48,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:35:48,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257553323] [2019-11-27 22:35:48,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:35:48,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:35:48,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:35:48,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:35:48,452 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand 3 states. [2019-11-27 22:35:48,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:35:48,495 INFO L93 Difference]: Finished difference Result 177 states and 241 transitions. [2019-11-27 22:35:48,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:35:48,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-27 22:35:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:35:48,497 INFO L225 Difference]: With dead ends: 177 [2019-11-27 22:35:48,497 INFO L226 Difference]: Without dead ends: 72 [2019-11-27 22:35:48,498 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 [2019-11-27 22:35:48,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-27 22:35:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-27 22:35:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-27 22:35:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2019-11-27 22:35:48,514 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 19 [2019-11-27 22:35:48,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:35:48,514 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2019-11-27 22:35:48,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:35:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2019-11-27 22:35:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-27 22:35:48,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:35:48,518 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:35:48,520 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:35:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:35:48,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1830460977, now seen corresponding path program 1 times [2019-11-27 22:35:48,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:35:48,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961617908] [2019-11-27 22:35:48,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:35:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:35:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-27 22:35:48,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961617908] [2019-11-27 22:35:48,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:35:48,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:35:48,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912218935] [2019-11-27 22:35:48,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:35:48,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:35:48,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:35:48,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:35:48,580 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand 3 states. [2019-11-27 22:35:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:35:48,596 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2019-11-27 22:35:48,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:35:48,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2019-11-27 22:35:48,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:35:48,598 INFO L225 Difference]: With dead ends: 120 [2019-11-27 22:35:48,598 INFO L226 Difference]: Without dead ends: 0 [2019-11-27 22:35:48,599 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 [2019-11-27 22:35:48,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-27 22:35:48,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-27 22:35:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-27 22:35:48,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-27 22:35:48,601 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2019-11-27 22:35:48,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:35:48,602 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-27 22:35:48,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:35:48,602 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-27 22:35:48,602 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-27 22:35:48,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-27 22:35:48,801 INFO L246 CegarLoopResult]: For program point L77-1(lines 53 106) no Hoare annotation was computed. [2019-11-27 22:35:48,801 INFO L249 CegarLoopResult]: At program point L139(lines 8 140) the Hoare annotation is: true [2019-11-27 22:35:48,801 INFO L246 CegarLoopResult]: For program point L69(lines 69 73) no Hoare annotation was computed. [2019-11-27 22:35:48,802 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-27 22:35:48,802 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-27 22:35:48,802 INFO L246 CegarLoopResult]: For program point L24(lines 24 127) no Hoare annotation was computed. [2019-11-27 22:35:48,802 INFO L246 CegarLoopResult]: For program point L57-1(lines 53 106) no Hoare annotation was computed. [2019-11-27 22:35:48,802 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 138) no Hoare annotation was computed. [2019-11-27 22:35:48,803 INFO L246 CegarLoopResult]: For program point L49(lines 49 108) no Hoare annotation was computed. [2019-11-27 22:35:48,803 INFO L246 CegarLoopResult]: For program point L45(lines 45 110) no Hoare annotation was computed. [2019-11-27 22:35:48,803 INFO L249 CegarLoopResult]: At program point L136(lines 8 140) the Hoare annotation is: true [2019-11-27 22:35:48,803 INFO L242 CegarLoopResult]: At program point L99(lines 17 134) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~blastFlag~0 3) (<= 8640 ULTIMATE.start_main_~s__state~0) (not (= ULTIMATE.start_main_~s__hit~0 0))) (<= ULTIMATE.start_main_~blastFlag~0 2)) [2019-11-27 22:35:48,803 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-27 22:35:48,804 INFO L246 CegarLoopResult]: For program point L95(lines 95 97) no Hoare annotation was computed. [2019-11-27 22:35:48,804 INFO L246 CegarLoopResult]: For program point L29(lines 29 124) no Hoare annotation was computed. [2019-11-27 22:35:48,804 INFO L242 CegarLoopResult]: At program point L25(lines 24 127) the Hoare annotation is: (<= ULTIMATE.start_main_~blastFlag~0 2) [2019-11-27 22:35:48,804 INFO L242 CegarLoopResult]: At program point L50(lines 49 108) the Hoare annotation is: (let ((.cse0 (<= 8656 ULTIMATE.start_main_~s__state~0))) (or (and .cse0 (<= ULTIMATE.start_main_~blastFlag~0 2)) (and .cse0 (<= ULTIMATE.start_main_~blastFlag~0 3) (not (= ULTIMATE.start_main_~s__hit~0 0))))) [2019-11-27 22:35:48,805 INFO L242 CegarLoopResult]: At program point L46(lines 45 110) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (and (<= ULTIMATE.start_main_~blastFlag~0 2) .cse0) (and (<= ULTIMATE.start_main_~blastFlag~0 3) .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0))))) [2019-11-27 22:35:48,805 INFO L242 CegarLoopResult]: At program point L96(lines 8 140) the Hoare annotation is: false [2019-11-27 22:35:48,805 INFO L242 CegarLoopResult]: At program point L30(lines 29 124) the Hoare annotation is: (<= ULTIMATE.start_main_~blastFlag~0 2) [2019-11-27 22:35:48,805 INFO L246 CegarLoopResult]: For program point L92-1(lines 53 106) no Hoare annotation was computed. [2019-11-27 22:35:48,805 INFO L246 CegarLoopResult]: For program point L88-1(lines 53 106) no Hoare annotation was computed. [2019-11-27 22:35:48,806 INFO L246 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2019-11-27 22:35:48,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 10:35:48 BoogieIcfgContainer [2019-11-27 22:35:48,827 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 22:35:48,827 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 22:35:48,827 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 22:35:48,828 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 22:35:48,828 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:35:47" (3/4) ... [2019-11-27 22:35:48,832 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-27 22:35:48,844 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-27 22:35:48,845 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-27 22:35:48,904 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 22:35:48,905 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 22:35:48,907 INFO L168 Benchmark]: Toolchain (without parser) took 2166.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 961.7 MB in the beginning and 1.0 GB in the end (delta: -41.0 MB). Peak memory consumption was 81.6 MB. Max. memory is 11.5 GB. [2019-11-27 22:35:48,908 INFO L168 Benchmark]: CDTParser took 0.27 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. [2019-11-27 22:35:48,911 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.21 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. [2019-11-27 22:35:48,912 INFO L168 Benchmark]: Boogie Procedure Inliner took 115.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -167.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-27 22:35:48,912 INFO L168 Benchmark]: Boogie Preprocessor took 38.04 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-27 22:35:48,913 INFO L168 Benchmark]: RCFGBuilder took 305.98 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: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-11-27 22:35:48,914 INFO L168 Benchmark]: TraceAbstraction took 1339.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 81.7 MB). Peak memory consumption was 81.7 MB. Max. memory is 11.5 GB. [2019-11-27 22:35:48,919 INFO L168 Benchmark]: Witness Printer took 77.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-27 22:35:48,925 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 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 284.21 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 115.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -167.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 38.04 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 305.98 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: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1339.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 81.7 MB). Peak memory consumption was 81.7 MB. Max. memory is 11.5 GB. * Witness Printer took 77.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 138]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (8656 <= s__state && blastFlag <= 2) || ((8656 <= s__state && blastFlag <= 3) && !(s__hit == 0)) - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((blastFlag <= 3 && 8640 <= s__state) && !(s__hit == 0)) || blastFlag <= 2 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: (blastFlag <= 2 && 8640 <= s__state) || ((blastFlag <= 3 && 8640 <= s__state) && !(s__hit == 0)) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: blastFlag <= 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 1 error locations. Result: SAFE, OverallTime: 1.0s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 159 SDtfs, 93 SDslu, 84 SDs, 0 SdLazy, 95 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 33 NumberOfFragments, 62 HoareAnnotationTreeSize, 8 FomulaSimplifications, 175 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 3566 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 42/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...