./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/underapprox_2-2.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 1ca0873bbf5698fb1752ac7aba535da1c4a773e2 ............................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:05:29,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:05:29,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:05:29,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:05:29,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:05:29,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:05:29,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:05:29,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:05:29,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:05:29,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:05:29,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:05:29,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:05:29,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:05:29,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:05:29,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:05:29,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:05:29,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:05:29,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:05:29,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:05:29,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:05:29,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:05:29,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:05:29,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:05:29,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:05:29,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:05:29,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:05:29,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:05:29,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:05:29,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:05:29,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:05:29,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:05:29,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:05:29,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:05:29,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:05:29,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:05:29,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:05:29,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:05:29,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:05:29,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:05:29,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:05:29,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:05:29,323 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:05:29,358 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:05:29,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:05:29,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:05:29,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:05:29,365 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:05:29,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:05:29,366 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:05:29,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:05:29,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:05:29,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:05:29,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:05:29,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:05:29,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:05:29,370 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:05:29,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:05:29,371 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:05:29,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:05:29,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:05:29,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:05:29,372 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:05:29,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:05:29,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:05:29,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:05:29,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:05:29,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:05:29,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:05:29,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:05:29,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:05:29,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:05:29,376 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 -> 1ca0873bbf5698fb1752ac7aba535da1c4a773e2 [2019-11-28 17:05:29,724 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:05:29,748 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:05:29,751 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:05:29,753 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:05:29,754 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:05:29,755 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2019-11-28 17:05:29,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a1ae282f/404ad587131942da9e95cf3ef7af81f6/FLAG013accbcf [2019-11-28 17:05:30,219 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:05:30,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2019-11-28 17:05:30,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a1ae282f/404ad587131942da9e95cf3ef7af81f6/FLAG013accbcf [2019-11-28 17:05:30,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a1ae282f/404ad587131942da9e95cf3ef7af81f6 [2019-11-28 17:05:30,591 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:05:30,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:05:30,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:05:30,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:05:30,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:05:30,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:05:30" (1/1) ... [2019-11-28 17:05:30,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b8ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:30, skipping insertion in model container [2019-11-28 17:05:30,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:05:30" (1/1) ... [2019-11-28 17:05:30,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:05:30,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:05:30,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:05:30,826 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:05:30,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:05:30,858 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:05:30,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:30 WrapperNode [2019-11-28 17:05:30,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:05:30,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:05:30,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:05:30,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:05:30,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:30" (1/1) ... [2019-11-28 17:05:30,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:30" (1/1) ... [2019-11-28 17:05:30,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:05:30,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:05:30,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:05:30,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:05:30,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:30" (1/1) ... [2019-11-28 17:05:30,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:30" (1/1) ... [2019-11-28 17:05:30,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:30" (1/1) ... [2019-11-28 17:05:30,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:30" (1/1) ... [2019-11-28 17:05:30,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:30" (1/1) ... [2019-11-28 17:05:30,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:30" (1/1) ... [2019-11-28 17:05:30,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:30" (1/1) ... [2019-11-28 17:05:30,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:05:30,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:05:30,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:05:30,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:05:31,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:05:31,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:05:31,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:05:31,228 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:05:31,228 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-28 17:05:31,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:05:31 BoogieIcfgContainer [2019-11-28 17:05:31,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:05:31,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:05:31,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:05:31,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:05:31,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:05:30" (1/3) ... [2019-11-28 17:05:31,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51215704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:05:31, skipping insertion in model container [2019-11-28 17:05:31,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:30" (2/3) ... [2019-11-28 17:05:31,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51215704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:05:31, skipping insertion in model container [2019-11-28 17:05:31,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:05:31" (3/3) ... [2019-11-28 17:05:31,237 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2019-11-28 17:05:31,247 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:05:31,254 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:05:31,265 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:05:31,289 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:05:31,289 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:05:31,289 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:05:31,289 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:05:31,290 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:05:31,290 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:05:31,290 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:05:31,290 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:05:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-28 17:05:31,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-28 17:05:31,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:05:31,312 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-28 17:05:31,313 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:05:31,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:05:31,320 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-11-28 17:05:31,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:05:31,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250027190] [2019-11-28 17:05:31,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:05:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:05:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:05:31,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250027190] [2019-11-28 17:05:31,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:05:31,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 17:05:31,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754810562] [2019-11-28 17:05:31,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 17:05:31,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:05:31,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 17:05:31,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 17:05:31,573 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-28 17:05:31,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:05:31,605 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-11-28 17:05:31,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 17:05:31,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-28 17:05:31,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:05:31,620 INFO L225 Difference]: With dead ends: 17 [2019-11-28 17:05:31,623 INFO L226 Difference]: Without dead ends: 7 [2019-11-28 17:05:31,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 17:05:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-28 17:05:31,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-28 17:05:31,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 17:05:31,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-28 17:05:31,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-11-28 17:05:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:05:31,673 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-28 17:05:31,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 17:05:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-28 17:05:31,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-28 17:05:31,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:05:31,676 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-28 17:05:31,678 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:05:31,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:05:31,678 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-11-28 17:05:31,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:05:31,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574115466] [2019-11-28 17:05:31,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:05:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:05:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:05:31,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574115466] [2019-11-28 17:05:31,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500778107] [2019-11-28 17:05:31,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:05:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:05:31,864 WARN L262 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 17:05:31,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:05:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:05:31,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:05:31,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-11-28 17:05:31,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874787195] [2019-11-28 17:05:31,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:05:31,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:05:31,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:05:31,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:05:31,910 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2019-11-28 17:05:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:05:31,927 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-11-28 17:05:31,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 17:05:31,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-28 17:05:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:05:31,928 INFO L225 Difference]: With dead ends: 12 [2019-11-28 17:05:31,928 INFO L226 Difference]: Without dead ends: 8 [2019-11-28 17:05:31,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:05:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-28 17:05:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-28 17:05:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 17:05:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-28 17:05:31,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-11-28 17:05:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:05:31,934 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-28 17:05:31,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:05:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-28 17:05:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 17:05:31,935 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:05:31,935 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-11-28 17:05:32,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:05:32,136 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:05:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:05:32,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 2 times [2019-11-28 17:05:32,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:05:32,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239983711] [2019-11-28 17:05:32,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:05:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:05:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:05:32,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239983711] [2019-11-28 17:05:32,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735708846] [2019-11-28 17:05:32,239 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 [2019-11-28 17:05:32,267 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:05:32,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:05:32,269 WARN L262 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-28 17:05:32,270 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:05:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:05:32,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:05:32,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-28 17:05:32,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059904801] [2019-11-28 17:05:32,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 17:05:32,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:05:32,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 17:05:32,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:05:32,295 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2019-11-28 17:05:32,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:05:32,328 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-11-28 17:05:32,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:05:32,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-11-28 17:05:32,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:05:32,330 INFO L225 Difference]: With dead ends: 13 [2019-11-28 17:05:32,330 INFO L226 Difference]: Without dead ends: 9 [2019-11-28 17:05:32,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:05:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-28 17:05:32,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-28 17:05:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-28 17:05:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-28 17:05:32,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-11-28 17:05:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:05:32,334 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-28 17:05:32,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 17:05:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-28 17:05:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 17:05:32,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:05:32,335 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2019-11-28 17:05:32,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:05:32,539 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:05:32,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:05:32,540 INFO L82 PathProgramCache]: Analyzing trace with hash 516237138, now seen corresponding path program 3 times [2019-11-28 17:05:32,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:05:32,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098949819] [2019-11-28 17:05:32,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:05:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:05:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:05:32,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098949819] [2019-11-28 17:05:32,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118868141] [2019-11-28 17:05:32,660 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:05:32,700 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-28 17:05:32,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:05:32,702 INFO L264 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 17:05:32,703 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:05:32,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 17:05:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-28 17:05:32,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 17:05:32,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2019-11-28 17:05:32,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205631909] [2019-11-28 17:05:32,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:05:32,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:05:32,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:05:32,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:05:32,778 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2019-11-28 17:05:32,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:05:32,825 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2019-11-28 17:05:32,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:05:32,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-28 17:05:32,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:05:32,825 INFO L225 Difference]: With dead ends: 9 [2019-11-28 17:05:32,826 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:05:32,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:05:32,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:05:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:05:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:05:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:05:32,830 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2019-11-28 17:05:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:05:32,830 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:05:32,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:05:32,830 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:05:32,831 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:05:33,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:05:33,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 17:05:33,066 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 17:05:33,067 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-28 17:05:33,067 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 17:05:33,067 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 17:05:33,067 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-28 17:05:33,068 INFO L242 CegarLoopResult]: At program point L14-2(lines 14 17) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~x~0 0) (<= 0 ULTIMATE.start_main_~x~0)) (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 6)) [2019-11-28 17:05:33,068 INFO L246 CegarLoopResult]: For program point L14-3(lines 14 17) no Hoare annotation was computed. [2019-11-28 17:05:33,068 INFO L246 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-28 17:05:33,068 INFO L249 CegarLoopResult]: At program point L4-2(lines 1 20) the Hoare annotation is: true [2019-11-28 17:05:33,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:05:33 BoogieIcfgContainer [2019-11-28 17:05:33,088 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:05:33,088 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:05:33,088 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:05:33,089 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:05:33,089 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:05:31" (3/4) ... [2019-11-28 17:05:33,093 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:05:33,105 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-28 17:05:33,106 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 17:05:33,152 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:05:33,152 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:05:33,155 INFO L168 Benchmark]: Toolchain (without parser) took 2561.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 959.0 MB in the beginning and 1.0 GB in the end (delta: -61.0 MB). Peak memory consumption was 79.0 MB. Max. memory is 11.5 GB. [2019-11-28 17:05:33,156 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:05:33,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.70 ms. Allocated memory is still 1.0 GB. Free memory was 959.0 MB in the beginning and 948.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:05:33,158 INFO L168 Benchmark]: Boogie Procedure Inliner took 115.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 948.3 MB in the beginning and 1.1 GB in the end (delta: -187.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:05:33,158 INFO L168 Benchmark]: Boogie Preprocessor took 22.64 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:05:33,159 INFO L168 Benchmark]: RCFGBuilder took 230.92 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-28 17:05:33,160 INFO L168 Benchmark]: TraceAbstraction took 1857.26 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: 97.6 MB). Peak memory consumption was 97.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:05:33,161 INFO L168 Benchmark]: Witness Printer took 64.23 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. [2019-11-28 17:05:33,167 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 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 264.70 ms. Allocated memory is still 1.0 GB. Free memory was 959.0 MB in the beginning and 948.3 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 115.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 948.3 MB in the beginning and 1.1 GB in the end (delta: -187.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.64 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 230.92 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1857.26 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: 97.6 MB). Peak memory consumption was 97.6 MB. Max. memory is 11.5 GB. * Witness Printer took 64.23 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: 14]: Loop Invariant Derived loop invariant: (x <= 0 && 0 <= x) || (x + 4294967295) % 4294967296 < 6 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Result: SAFE, OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 3 SDslu, 17 SDs, 0 SdLazy, 40 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 6 NumberOfFragments, 16 HoareAnnotationTreeSize, 2 FomulaSimplifications, 28 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 47 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 976 SizeOfPredicates, 3 NumberOfNonLiveVariables, 67 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 6/20 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...