./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/cggmp2005b.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-lit/cggmp2005b.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 7408fe5ba42f5c474832c90e26f3e7ef2342554c .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-19 21:16:41,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 21:16:41,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 21:16:41,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 21:16:41,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 21:16:41,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 21:16:41,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 21:16:41,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 21:16:41,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 21:16:41,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 21:16:41,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 21:16:41,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 21:16:41,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 21:16:41,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 21:16:41,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 21:16:41,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 21:16:41,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 21:16:41,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 21:16:41,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 21:16:41,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 21:16:41,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 21:16:41,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 21:16:41,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 21:16:41,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 21:16:41,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 21:16:41,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 21:16:41,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 21:16:41,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 21:16:41,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 21:16:41,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 21:16:41,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 21:16:41,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 21:16:41,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 21:16:41,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 21:16:41,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 21:16:41,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 21:16:41,303 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 21:16:41,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 21:16:41,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 21:16:41,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 21:16:41,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 21:16:41,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 21:16:41,331 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 21:16:41,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 21:16:41,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 21:16:41,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 21:16:41,333 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 21:16:41,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 21:16:41,334 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 21:16:41,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 21:16:41,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 21:16:41,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 21:16:41,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 21:16:41,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 21:16:41,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 21:16:41,337 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 21:16:41,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 21:16:41,338 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 21:16:41,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 21:16:41,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 21:16:41,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 21:16:41,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 21:16:41,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 21:16:41,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 21:16:41,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 21:16:41,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 21:16:41,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 21:16:41,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 21:16:41,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 21:16:41,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 21:16:41,341 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 -> 7408fe5ba42f5c474832c90e26f3e7ef2342554c [2019-11-19 21:16:41,631 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 21:16:41,644 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 21:16:41,648 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 21:16:41,649 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 21:16:41,649 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 21:16:41,650 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/cggmp2005b.i [2019-11-19 21:16:41,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a3128c71/a118e2e4dff749b68f611701f55c6660/FLAGd6922e4a4 [2019-11-19 21:16:42,158 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 21:16:42,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/cggmp2005b.i [2019-11-19 21:16:42,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a3128c71/a118e2e4dff749b68f611701f55c6660/FLAGd6922e4a4 [2019-11-19 21:16:42,552 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a3128c71/a118e2e4dff749b68f611701f55c6660 [2019-11-19 21:16:42,555 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 21:16:42,556 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 21:16:42,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 21:16:42,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 21:16:42,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 21:16:42,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:16:42" (1/1) ... [2019-11-19 21:16:42,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fa7a13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:16:42, skipping insertion in model container [2019-11-19 21:16:42,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:16:42" (1/1) ... [2019-11-19 21:16:42,572 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 21:16:42,588 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 21:16:42,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 21:16:42,779 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 21:16:42,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 21:16:42,802 INFO L192 MainTranslator]: Completed translation [2019-11-19 21:16:42,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:16:42 WrapperNode [2019-11-19 21:16:42,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 21:16:42,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 21:16:42,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 21:16:42,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 21:16:42,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:16:42" (1/1) ... [2019-11-19 21:16:42,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:16:42" (1/1) ... [2019-11-19 21:16:42,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 21:16:42,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 21:16:42,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 21:16:42,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 21:16:42,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:16:42" (1/1) ... [2019-11-19 21:16:42,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:16:42" (1/1) ... [2019-11-19 21:16:42,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:16:42" (1/1) ... [2019-11-19 21:16:42,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:16:42" (1/1) ... [2019-11-19 21:16:42,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:16:42" (1/1) ... [2019-11-19 21:16:42,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:16:42" (1/1) ... [2019-11-19 21:16:42,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:16:42" (1/1) ... [2019-11-19 21:16:42,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 21:16:42,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 21:16:42,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 21:16:42,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 21:16:42,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:16:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 21:16:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 21:16:42,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 21:16:43,129 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 21:16:43,130 INFO L285 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-19 21:16:43,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:16:43 BoogieIcfgContainer [2019-11-19 21:16:43,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 21:16:43,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 21:16:43,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 21:16:43,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 21:16:43,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:16:42" (1/3) ... [2019-11-19 21:16:43,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648fddbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:16:43, skipping insertion in model container [2019-11-19 21:16:43,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:16:42" (2/3) ... [2019-11-19 21:16:43,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648fddbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:16:43, skipping insertion in model container [2019-11-19 21:16:43,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:16:43" (3/3) ... [2019-11-19 21:16:43,138 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2019-11-19 21:16:43,145 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 21:16:43,151 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 21:16:43,162 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 21:16:43,187 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 21:16:43,187 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 21:16:43,187 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 21:16:43,188 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 21:16:43,188 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 21:16:43,188 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 21:16:43,188 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 21:16:43,188 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 21:16:43,202 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-11-19 21:16:43,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-19 21:16:43,207 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:16:43,208 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-19 21:16:43,208 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:16:43,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:16:43,213 INFO L82 PathProgramCache]: Analyzing trace with hash 30693764, now seen corresponding path program 1 times [2019-11-19 21:16:43,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:16:43,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428414684] [2019-11-19 21:16:43,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:16:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:16:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:16:43,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428414684] [2019-11-19 21:16:43,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:16:43,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 21:16:43,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399728508] [2019-11-19 21:16:43,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 21:16:43,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:16:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 21:16:43,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 21:16:43,333 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2019-11-19 21:16:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:16:43,351 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2019-11-19 21:16:43,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 21:16:43,353 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-19 21:16:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:16:43,362 INFO L225 Difference]: With dead ends: 25 [2019-11-19 21:16:43,363 INFO L226 Difference]: Without dead ends: 9 [2019-11-19 21:16:43,366 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 [2019-11-19 21:16:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-19 21:16:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-19 21:16:43,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-19 21:16:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-11-19 21:16:43,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 5 [2019-11-19 21:16:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:16:43,402 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-19 21:16:43,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 21:16:43,402 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-11-19 21:16:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-19 21:16:43,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:16:43,403 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-19 21:16:43,404 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:16:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:16:43,404 INFO L82 PathProgramCache]: Analyzing trace with hash 29829825, now seen corresponding path program 1 times [2019-11-19 21:16:43,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:16:43,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088092864] [2019-11-19 21:16:43,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:16:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:16:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:16:43,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088092864] [2019-11-19 21:16:43,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:16:43,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 21:16:43,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733958002] [2019-11-19 21:16:43,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 21:16:43,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:16:43,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 21:16:43,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 21:16:43,453 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 3 states. [2019-11-19 21:16:43,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:16:43,502 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2019-11-19 21:16:43,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 21:16:43,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-19 21:16:43,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:16:43,504 INFO L225 Difference]: With dead ends: 14 [2019-11-19 21:16:43,504 INFO L226 Difference]: Without dead ends: 10 [2019-11-19 21:16:43,505 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 [2019-11-19 21:16:43,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-19 21:16:43,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-19 21:16:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-19 21:16:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-11-19 21:16:43,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 5 [2019-11-19 21:16:43,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:16:43,510 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-11-19 21:16:43,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 21:16:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2019-11-19 21:16:43,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-19 21:16:43,510 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:16:43,511 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:16:43,511 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:16:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:16:43,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1133380143, now seen corresponding path program 1 times [2019-11-19 21:16:43,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:16:43,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592879869] [2019-11-19 21:16:43,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:16:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:16:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:16:43,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592879869] [2019-11-19 21:16:43,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:16:43,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 21:16:43,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667895371] [2019-11-19 21:16:43,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 21:16:43,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:16:43,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 21:16:43,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 21:16:43,585 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 3 states. [2019-11-19 21:16:43,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:16:43,609 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2019-11-19 21:16:43,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 21:16:43,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-19 21:16:43,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:16:43,610 INFO L225 Difference]: With dead ends: 19 [2019-11-19 21:16:43,610 INFO L226 Difference]: Without dead ends: 11 [2019-11-19 21:16:43,611 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 [2019-11-19 21:16:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-19 21:16:43,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-19 21:16:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-19 21:16:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-11-19 21:16:43,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 9 [2019-11-19 21:16:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:16:43,615 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-19 21:16:43,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 21:16:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-11-19 21:16:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 21:16:43,616 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:16:43,616 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:16:43,616 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:16:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:16:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1245368368, now seen corresponding path program 1 times [2019-11-19 21:16:43,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:16:43,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970677519] [2019-11-19 21:16:43,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:16:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:16:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 21:16:43,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970677519] [2019-11-19 21:16:43,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871073504] [2019-11-19 21:16:43,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:16:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:16:43,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 21:16:43,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:16:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 21:16:43,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:16:43,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-19 21:16:43,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925307821] [2019-11-19 21:16:43,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 21:16:43,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:16:43,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 21:16:43,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 21:16:43,780 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 4 states. [2019-11-19 21:16:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:16:43,810 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2019-11-19 21:16:43,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 21:16:43,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-19 21:16:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:16:43,812 INFO L225 Difference]: With dead ends: 19 [2019-11-19 21:16:43,812 INFO L226 Difference]: Without dead ends: 15 [2019-11-19 21:16:43,812 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 21:16:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-19 21:16:43,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-19 21:16:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-19 21:16:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2019-11-19 21:16:43,818 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2019-11-19 21:16:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:16:43,819 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2019-11-19 21:16:43,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 21:16:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2019-11-19 21:16:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-19 21:16:43,820 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:16:43,820 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-19 21:16:44,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:16:44,024 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:16:44,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:16:44,024 INFO L82 PathProgramCache]: Analyzing trace with hash 265611198, now seen corresponding path program 2 times [2019-11-19 21:16:44,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:16:44,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271422300] [2019-11-19 21:16:44,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:16:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:16:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:16:44,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271422300] [2019-11-19 21:16:44,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721519494] [2019-11-19 21:16:44,079 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:16:44,118 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 21:16:44,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:16:44,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 21:16:44,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:16:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-19 21:16:44,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:16:44,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-19 21:16:44,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653544830] [2019-11-19 21:16:44,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 21:16:44,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:16:44,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 21:16:44,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-19 21:16:44,170 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 7 states. [2019-11-19 21:16:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:16:44,229 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2019-11-19 21:16:44,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 21:16:44,230 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-11-19 21:16:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:16:44,231 INFO L225 Difference]: With dead ends: 27 [2019-11-19 21:16:44,231 INFO L226 Difference]: Without dead ends: 16 [2019-11-19 21:16:44,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-19 21:16:44,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-19 21:16:44,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-19 21:16:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-19 21:16:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-19 21:16:44,237 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2019-11-19 21:16:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:16:44,237 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-19 21:16:44,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 21:16:44,238 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-19 21:16:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-19 21:16:44,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:16:44,239 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-19 21:16:44,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:16:44,440 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:16:44,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:16:44,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1154356925, now seen corresponding path program 3 times [2019-11-19 21:16:44,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:16:44,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961245793] [2019-11-19 21:16:44,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:16:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:16:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-19 21:16:44,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961245793] [2019-11-19 21:16:44,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:16:44,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-19 21:16:44,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456941970] [2019-11-19 21:16:44,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 21:16:44,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:16:44,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 21:16:44,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-19 21:16:44,506 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-19 21:16:44,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:16:44,528 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2019-11-19 21:16:44,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 21:16:44,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-19 21:16:44,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:16:44,529 INFO L225 Difference]: With dead ends: 24 [2019-11-19 21:16:44,529 INFO L226 Difference]: Without dead ends: 0 [2019-11-19 21:16:44,530 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-19 21:16:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-19 21:16:44,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-19 21:16:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-19 21:16:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-19 21:16:44,531 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2019-11-19 21:16:44,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:16:44,531 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 21:16:44,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 21:16:44,531 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-19 21:16:44,531 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-19 21:16:44,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-19 21:16:44,611 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-19 21:16:44,612 INFO L440 ceAbstractionStarter]: At program point L21-2(lines 21 23) the Hoare annotation is: (= ULTIMATE.start_main_~k~0 4) [2019-11-19 21:16:44,612 INFO L440 ceAbstractionStarter]: At program point L21-3(lines 15 24) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~i~0 0) (<= (+ ULTIMATE.start_main_~j~0 100) ULTIMATE.start_main_~i~0)) (= ULTIMATE.start_main_~k~0 4)) [2019-11-19 21:16:44,612 INFO L440 ceAbstractionStarter]: At program point L17-2(lines 17 19) the Hoare annotation is: (or (<= ULTIMATE.start_main_~i~0 1) (= ULTIMATE.start_main_~k~0 4)) [2019-11-19 21:16:44,612 INFO L444 ceAbstractionStarter]: For program point L17-3(lines 17 19) no Hoare annotation was computed. [2019-11-19 21:16:44,613 INFO L444 ceAbstractionStarter]: For program point L15-2(lines 15 24) no Hoare annotation was computed. [2019-11-19 21:16:44,613 INFO L444 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-19 21:16:44,613 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-19 21:16:44,613 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-19 21:16:44,613 INFO L447 ceAbstractionStarter]: At program point L26(lines 10 27) the Hoare annotation is: true [2019-11-19 21:16:44,613 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-19 21:16:44,614 INFO L444 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-19 21:16:44,614 INFO L447 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2019-11-19 21:16:44,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 09:16:44 BoogieIcfgContainer [2019-11-19 21:16:44,630 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 21:16:44,631 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 21:16:44,631 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 21:16:44,631 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 21:16:44,632 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:16:43" (3/4) ... [2019-11-19 21:16:44,636 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-19 21:16:44,647 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-19 21:16:44,648 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-19 21:16:44,717 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 21:16:44,717 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 21:16:44,719 INFO L168 Benchmark]: Toolchain (without parser) took 2162.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 952.3 MB in the beginning and 1.0 GB in the end (delta: -89.8 MB). Peak memory consumption was 50.2 MB. Max. memory is 11.5 GB. [2019-11-19 21:16:44,720 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 21:16:44,720 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.21 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-19 21:16:44,721 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -195.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2019-11-19 21:16:44,722 INFO L168 Benchmark]: Boogie Preprocessor took 28.43 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 21:16:44,723 INFO L168 Benchmark]: RCFGBuilder took 213.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. [2019-11-19 21:16:44,723 INFO L168 Benchmark]: TraceAbstraction took 1498.57 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: 77.2 MB). Peak memory consumption was 77.2 MB. Max. memory is 11.5 GB. [2019-11-19 21:16:44,724 INFO L168 Benchmark]: Witness Printer took 85.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 21:16:44,728 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 246.21 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 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 84.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -195.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.43 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. * RCFGBuilder took 213.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1498.57 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: 77.2 MB). Peak memory consumption was 77.2 MB. Max. memory is 11.5 GB. * Witness Printer took 85.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 17]: Loop Invariant Derived loop invariant: i <= 1 || k == 4 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: (i <= 0 && j + 100 <= i) || k == 4 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: k == 4 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Result: SAFE, OverallTime: 1.4s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 5 SDslu, 63 SDs, 0 SdLazy, 32 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=5, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 16 NumberOfFragments, 25 HoareAnnotationTreeSize, 5 FomulaSimplifications, 44 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 1622 SizeOfPredicates, 3 NumberOfNonLiveVariables, 59 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 27/32 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...