java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 02:50:19,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 02:50:19,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 02:50:19,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 02:50:19,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 02:50:19,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 02:50:19,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 02:50:19,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 02:50:19,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 02:50:19,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 02:50:19,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 02:50:19,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 02:50:19,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 02:50:19,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 02:50:19,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 02:50:19,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 02:50:19,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 02:50:19,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 02:50:19,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 02:50:19,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 02:50:19,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 02:50:19,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 02:50:19,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 02:50:19,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 02:50:19,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 02:50:19,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 02:50:19,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 02:50:19,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 02:50:19,279 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-08 02:50:19,293 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 02:50:19,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 02:50:19,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 02:50:19,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 02:50:19,294 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 02:50:19,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 02:50:19,295 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 02:50:19,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 02:50:19,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 02:50:19,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 02:50:19,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 02:50:19,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 02:50:19,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 02:50:19,296 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 02:50:19,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 02:50:19,296 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 02:50:19,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 02:50:19,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 02:50:19,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 02:50:19,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 02:50:19,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 02:50:19,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 02:50:19,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 02:50:19,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 02:50:19,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 02:50:19,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 02:50:19,299 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 02:50:19,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 02:50:19,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 02:50:19,326 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 02:50:19,338 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 02:50:19,342 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 02:50:19,343 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 02:50:19,343 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 02:50:19,344 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2019-09-08 02:50:19,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3dbb3b1f/796903a2ab774d7a8aa55decb8876e07/FLAG9b03f2a3d [2019-09-08 02:50:19,795 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 02:50:19,796 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2019-09-08 02:50:19,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3dbb3b1f/796903a2ab774d7a8aa55decb8876e07/FLAG9b03f2a3d [2019-09-08 02:50:20,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3dbb3b1f/796903a2ab774d7a8aa55decb8876e07 [2019-09-08 02:50:20,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 02:50:20,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 02:50:20,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 02:50:20,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 02:50:20,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 02:50:20,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 02:50:20" (1/1) ... [2019-09-08 02:50:20,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aaddbe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:50:20, skipping insertion in model container [2019-09-08 02:50:20,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 02:50:20" (1/1) ... [2019-09-08 02:50:20,238 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 02:50:20,253 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 02:50:20,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 02:50:20,435 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 02:50:20,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 02:50:20,463 INFO L192 MainTranslator]: Completed translation [2019-09-08 02:50:20,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:50:20 WrapperNode [2019-09-08 02:50:20,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 02:50:20,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 02:50:20,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 02:50:20,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 02:50:20,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:50:20" (1/1) ... [2019-09-08 02:50:20,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:50:20" (1/1) ... [2019-09-08 02:50:20,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:50:20" (1/1) ... [2019-09-08 02:50:20,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:50:20" (1/1) ... [2019-09-08 02:50:20,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:50:20" (1/1) ... [2019-09-08 02:50:20,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:50:20" (1/1) ... [2019-09-08 02:50:20,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:50:20" (1/1) ... [2019-09-08 02:50:20,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 02:50:20,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 02:50:20,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 02:50:20,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 02:50:20,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:50:20" (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 [2019-09-08 02:50:20,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 02:50:20,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 02:50:20,623 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-08 02:50:20,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 02:50:20,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 02:50:20,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-08 02:50:20,624 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 02:50:20,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 02:50:20,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 02:50:20,767 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 02:50:20,768 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-08 02:50:20,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 02:50:20 BoogieIcfgContainer [2019-09-08 02:50:20,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 02:50:20,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 02:50:20,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 02:50:20,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 02:50:20,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 02:50:20" (1/3) ... [2019-09-08 02:50:20,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e91690a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 02:50:20, skipping insertion in model container [2019-09-08 02:50:20,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:50:20" (2/3) ... [2019-09-08 02:50:20,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e91690a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 02:50:20, skipping insertion in model container [2019-09-08 02:50:20,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 02:50:20" (3/3) ... [2019-09-08 02:50:20,787 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2019-09-08 02:50:20,799 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 02:50:20,806 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 02:50:20,821 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 02:50:20,849 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 02:50:20,850 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 02:50:20,850 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 02:50:20,851 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 02:50:20,851 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 02:50:20,851 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 02:50:20,851 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 02:50:20,851 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 02:50:20,851 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 02:50:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-09-08 02:50:20,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-08 02:50:20,873 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:50:20,874 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:50:20,876 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:50:20,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:50:20,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-09-08 02:50:20,884 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:50:20,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:50:20,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:20,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:50:20,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:50:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:50:21,145 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 02:50:21,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 02:50:21,156 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 02:50:21,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 02:50:21,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 02:50:21,183 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2019-09-08 02:50:21,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:50:21,366 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-09-08 02:50:21,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 02:50:21,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-08 02:50:21,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:50:21,378 INFO L225 Difference]: With dead ends: 36 [2019-09-08 02:50:21,378 INFO L226 Difference]: Without dead ends: 12 [2019-09-08 02:50:21,383 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 02:50:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-08 02:50:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-08 02:50:21,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-08 02:50:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-09-08 02:50:21,422 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-09-08 02:50:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:50:21,422 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-09-08 02:50:21,423 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 02:50:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-09-08 02:50:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-08 02:50:21,425 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:50:21,425 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:50:21,428 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:50:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:50:21,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-09-08 02:50:21,430 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:50:21,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:50:21,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:21,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:50:21,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:50:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:50:21,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:50:21,574 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 02:50:21,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:50:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:50:21,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-08 02:50:21,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:50:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:50:21,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:50:21,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-09-08 02:50:21,674 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 02:50:21,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 02:50:21,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-08 02:50:21,678 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2019-09-08 02:50:21,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:50:21,756 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-08 02:50:21,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-08 02:50:21,757 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-09-08 02:50:21,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:50:21,759 INFO L225 Difference]: With dead ends: 18 [2019-09-08 02:50:21,759 INFO L226 Difference]: Without dead ends: 13 [2019-09-08 02:50:21,760 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-08 02:50:21,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-08 02:50:21,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-08 02:50:21,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-08 02:50:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-08 02:50:21,767 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-08 02:50:21,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:50:21,767 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-08 02:50:21,767 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 02:50:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-08 02:50:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-08 02:50:21,768 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:50:21,769 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:50:21,769 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:50:21,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:50:21,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2019-09-08 02:50:21,770 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:50:21,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:50:21,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:21,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:50:21,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:50:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:50:21,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:50:21,906 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 02:50:21,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 02:50:21,932 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 02:50:21,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:50:21,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-08 02:50:21,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:50:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:50:21,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:50:21,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-09-08 02:50:21,985 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 02:50:21,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 02:50:21,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-08 02:50:21,986 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2019-09-08 02:50:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:50:22,073 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-08 02:50:22,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 02:50:22,074 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2019-09-08 02:50:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:50:22,075 INFO L225 Difference]: With dead ends: 19 [2019-09-08 02:50:22,075 INFO L226 Difference]: Without dead ends: 14 [2019-09-08 02:50:22,076 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-08 02:50:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-08 02:50:22,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-08 02:50:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-08 02:50:22,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-08 02:50:22,081 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-08 02:50:22,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:50:22,082 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-08 02:50:22,082 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 02:50:22,082 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-08 02:50:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 02:50:22,083 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:50:22,083 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:50:22,083 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:50:22,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:50:22,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2019-09-08 02:50:22,084 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:50:22,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:50:22,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:22,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:50:22,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:50:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:50:22,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:50:22,229 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 02:50:22,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 02:50:22,275 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-08 02:50:22,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:50:22,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-08 02:50:22,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:50:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:50:22,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:50:22,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-09-08 02:50:22,338 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 02:50:22,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 02:50:22,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-09-08 02:50:22,339 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 12 states. [2019-09-08 02:50:22,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:50:22,458 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-08 02:50:22,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 02:50:22,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2019-09-08 02:50:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:50:22,460 INFO L225 Difference]: With dead ends: 20 [2019-09-08 02:50:22,460 INFO L226 Difference]: Without dead ends: 15 [2019-09-08 02:50:22,460 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2019-09-08 02:50:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-08 02:50:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-08 02:50:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-08 02:50:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-08 02:50:22,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-08 02:50:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:50:22,466 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-08 02:50:22,466 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 02:50:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-08 02:50:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 02:50:22,467 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:50:22,467 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:50:22,467 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:50:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:50:22,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2019-09-08 02:50:22,468 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:50:22,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:50:22,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:22,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:50:22,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:50:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:50:22,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:50:22,608 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 02:50:22,626 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 02:50:22,636 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 02:50:22,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:50:22,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-08 02:50:22,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:50:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:50:22,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:50:22,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2019-09-08 02:50:22,738 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 02:50:22,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 02:50:22,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-09-08 02:50:22,740 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2019-09-08 02:50:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:50:22,887 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-09-08 02:50:22,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 02:50:22,888 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2019-09-08 02:50:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:50:22,888 INFO L225 Difference]: With dead ends: 21 [2019-09-08 02:50:22,889 INFO L226 Difference]: Without dead ends: 16 [2019-09-08 02:50:22,889 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2019-09-08 02:50:22,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-08 02:50:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-08 02:50:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-08 02:50:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-08 02:50:22,898 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-08 02:50:22,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:50:22,900 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-08 02:50:22,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 02:50:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-08 02:50:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-08 02:50:22,902 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:50:22,902 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:50:22,902 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:50:22,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:50:22,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2019-09-08 02:50:22,903 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:50:22,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:50:22,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:22,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:50:22,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:50:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:50:23,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 02:50:23,103 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 02:50:23,123 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 02:50:23,140 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-08 02:50:23,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 02:50:23,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-08 02:50:23,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 02:50:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:50:23,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 02:50:23,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-09-08 02:50:23,250 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 02:50:23,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 02:50:23,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2019-09-08 02:50:23,251 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2019-09-08 02:50:23,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:50:23,464 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-09-08 02:50:23,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 02:50:23,464 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2019-09-08 02:50:23,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:50:23,465 INFO L225 Difference]: With dead ends: 22 [2019-09-08 02:50:23,465 INFO L226 Difference]: Without dead ends: 17 [2019-09-08 02:50:23,466 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-09-08 02:50:23,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-08 02:50:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-08 02:50:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-08 02:50:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-08 02:50:23,484 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-09-08 02:50:23,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:50:23,484 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-08 02:50:23,484 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 02:50:23,484 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-08 02:50:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-08 02:50:23,485 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:50:23,485 INFO L399 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:50:23,488 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:50:23,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:50:23,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2019-09-08 02:50:23,488 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:50:23,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:50:23,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:23,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 02:50:23,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:50:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-08 02:50:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-08 02:50:23,561 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-08 02:50:23,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 02:50:23 BoogieIcfgContainer [2019-09-08 02:50:23,592 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 02:50:23,597 INFO L168 Benchmark]: Toolchain (without parser) took 3371.59 ms. Allocated memory was 141.6 MB in the beginning and 255.3 MB in the end (delta: 113.8 MB). Free memory was 89.6 MB in the beginning and 224.4 MB in the end (delta: -134.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-08 02:50:23,597 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 107.7 MB in the beginning and 107.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-08 02:50:23,599 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.69 ms. Allocated memory is still 141.6 MB. Free memory was 89.1 MB in the beginning and 79.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-08 02:50:23,601 INFO L168 Benchmark]: Boogie Preprocessor took 107.15 ms. Allocated memory was 141.6 MB in the beginning and 201.3 MB in the end (delta: 59.8 MB). Free memory was 79.7 MB in the beginning and 179.2 MB in the end (delta: -99.5 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-08 02:50:23,602 INFO L168 Benchmark]: RCFGBuilder took 198.82 ms. Allocated memory is still 201.3 MB. Free memory was 179.2 MB in the beginning and 168.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-09-08 02:50:23,608 INFO L168 Benchmark]: TraceAbstraction took 2820.91 ms. Allocated memory was 201.3 MB in the beginning and 255.3 MB in the end (delta: 54.0 MB). Free memory was 168.4 MB in the beginning and 224.4 MB in the end (delta: -56.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-08 02:50:23,614 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 107.7 MB in the beginning and 107.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 240.69 ms. Allocated memory is still 141.6 MB. Free memory was 89.1 MB in the beginning and 79.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.15 ms. Allocated memory was 141.6 MB in the beginning and 201.3 MB in the end (delta: 59.8 MB). Free memory was 79.7 MB in the beginning and 179.2 MB in the end (delta: -99.5 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 198.82 ms. Allocated memory is still 201.3 MB. Free memory was 179.2 MB in the beginning and 168.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2820.91 ms. Allocated memory was 201.3 MB in the beginning and 255.3 MB in the end (delta: 54.0 MB). Free memory was 168.4 MB in the beginning and 224.4 MB in the end (delta: -56.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; VAL [x=0, y=1] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=1, y=2] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=2, y=4] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=3, y=8] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=4, y=16] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=5, y=32] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=6, y=64] [L14] COND FALSE !(x < 6) VAL [x=6, y=64] [L19] CALL __VERIFIER_assert(y != 64) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. UNSAFE Result, 2.7s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 64 SDtfs, 7 SDslu, 441 SDs, 0 SdLazy, 278 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 4975 SizeOfPredicates, 5 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...