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/recursive-simple/id_i10_o10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:27:41,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:27:41,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:27:41,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:27:41,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:27:41,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:27:41,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:27:41,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:27:41,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:27:41,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:27:41,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:27:41,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:27:41,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:27:41,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:27:41,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:27:41,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:27:41,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:27:41,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:27:41,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:27:41,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:27:41,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:27:41,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:27:41,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:27:41,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:27:41,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:27:41,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:27:41,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:27:41,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:27:41,511 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 06:27:41,525 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:27:41,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:27:41,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:27:41,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:27:41,527 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:27:41,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:27:41,528 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:27:41,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:27:41,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:27:41,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:27:41,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:27:41,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:27:41,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:27:41,529 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:27:41,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:27:41,529 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:27:41,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:27:41,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:27:41,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:27:41,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:27:41,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:27:41,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:27:41,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:27:41,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:27:41,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:27:41,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:27:41,532 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:27:41,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:27:41,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:27:41,561 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:27:41,574 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:27:41,578 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:27:41,579 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:27:41,580 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:27:41,580 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2019-09-08 06:27:41,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dc40a616/473b647b9d3347bcae39ff6d02fb2145/FLAG9ecb8717c [2019-09-08 06:27:42,093 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:27:42,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2019-09-08 06:27:42,100 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dc40a616/473b647b9d3347bcae39ff6d02fb2145/FLAG9ecb8717c [2019-09-08 06:27:42,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dc40a616/473b647b9d3347bcae39ff6d02fb2145 [2019-09-08 06:27:42,480 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:27:42,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:27:42,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:27:42,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:27:42,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:27:42,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:27:42" (1/1) ... [2019-09-08 06:27:42,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f255d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:42, skipping insertion in model container [2019-09-08 06:27:42,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:27:42" (1/1) ... [2019-09-08 06:27:42,499 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:27:42,515 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:27:42,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:27:42,725 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:27:42,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:27:42,759 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:27:42,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:42 WrapperNode [2019-09-08 06:27:42,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:27:42,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:27:42,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:27:42,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:27:42,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:42" (1/1) ... [2019-09-08 06:27:42,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:42" (1/1) ... [2019-09-08 06:27:42,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:42" (1/1) ... [2019-09-08 06:27:42,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:42" (1/1) ... [2019-09-08 06:27:42,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:42" (1/1) ... [2019-09-08 06:27:42,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:42" (1/1) ... [2019-09-08 06:27:42,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:42" (1/1) ... [2019-09-08 06:27:42,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:27:42,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:27:42,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:27:42,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:27:42,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:27:42,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:27:42,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:27:42,952 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-09-08 06:27:42,953 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:27:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:27:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:27:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-09-08 06:27:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:27:42,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:27:42,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:27:43,102 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:27:43,102 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:27:43,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:27:43 BoogieIcfgContainer [2019-09-08 06:27:43,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:27:43,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:27:43,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:27:43,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:27:43,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:27:42" (1/3) ... [2019-09-08 06:27:43,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27fdd9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:27:43, skipping insertion in model container [2019-09-08 06:27:43,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:42" (2/3) ... [2019-09-08 06:27:43,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27fdd9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:27:43, skipping insertion in model container [2019-09-08 06:27:43,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:27:43" (3/3) ... [2019-09-08 06:27:43,112 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2019-09-08 06:27:43,122 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:27:43,129 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:27:43,147 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:27:43,176 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:27:43,177 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:27:43,177 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:27:43,177 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:27:43,178 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:27:43,178 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:27:43,178 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:27:43,178 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:27:43,178 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:27:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-08 06:27:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:27:43,206 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:43,207 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:43,208 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:43,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:43,213 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2019-09-08 06:27:43,215 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:43,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:43,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:43,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:43,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:43,388 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 06:27:43,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:27:43,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:27:43,415 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:27:43,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:27:43,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:43,441 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2019-09-08 06:27:43,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:43,602 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-09-08 06:27:43,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:27:43,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:27:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:43,617 INFO L225 Difference]: With dead ends: 30 [2019-09-08 06:27:43,617 INFO L226 Difference]: Without dead ends: 18 [2019-09-08 06:27:43,621 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:27:43,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-08 06:27:43,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-08 06:27:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-08 06:27:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-08 06:27:43,665 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-08 06:27:43,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:43,666 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-08 06:27:43,666 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:27:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-08 06:27:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-08 06:27:43,668 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:43,668 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:43,669 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:43,669 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2019-09-08 06:27:43,670 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:43,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:43,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:43,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:43,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 06:27:43,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:43,746 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 06:27:43,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:43,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:27:43,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Stream Closed [2019-09-08 06:27:43,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:43,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-09-08 06:27:43,851 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 06:27:43,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 06:27:43,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:27:43,853 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2019-09-08 06:27:43,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:43,949 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-09-08 06:27:43,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 06:27:43,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-09-08 06:27:43,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:43,952 INFO L225 Difference]: With dead ends: 25 [2019-09-08 06:27:43,952 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 06:27:43,953 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:27:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 06:27:43,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-08 06:27:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:27:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-08 06:27:43,961 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2019-09-08 06:27:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:43,961 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-08 06:27:43,961 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 06:27:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-08 06:27:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-08 06:27:43,963 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:43,963 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:43,963 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:43,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:43,964 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2019-09-08 06:27:43,964 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:43,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:43,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:43,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:43,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 06:27:44,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:44,060 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 06:27:44,086 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 06:27:44,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:27:44,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:44,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:27:44,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 06:27:44,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:44,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:27:44,168 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:27:44,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:27:44,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:27:44,170 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2019-09-08 06:27:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:44,268 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2019-09-08 06:27:44,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:27:44,272 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-09-08 06:27:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:44,273 INFO L225 Difference]: With dead ends: 28 [2019-09-08 06:27:44,274 INFO L226 Difference]: Without dead ends: 24 [2019-09-08 06:27:44,276 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:27:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-08 06:27:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-08 06:27:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-08 06:27:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-09-08 06:27:44,289 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2019-09-08 06:27:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:44,290 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-09-08 06:27:44,290 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:27:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-09-08 06:27:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-08 06:27:44,292 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:44,292 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:44,293 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:44,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:44,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2019-09-08 06:27:44,294 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:44,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:44,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:44,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:44,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-08 06:27:44,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:44,412 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:44,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:27:44,459 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-08 06:27:44,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:44,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:27:44,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-08 06:27:44,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:44,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2019-09-08 06:27:44,637 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:27:44,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:27:44,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:27:44,638 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 17 states. [2019-09-08 06:27:44,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:44,834 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2019-09-08 06:27:44,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:27:44,835 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2019-09-08 06:27:44,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:44,836 INFO L225 Difference]: With dead ends: 31 [2019-09-08 06:27:44,837 INFO L226 Difference]: Without dead ends: 27 [2019-09-08 06:27:44,838 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:27:44,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-08 06:27:44,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-08 06:27:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-08 06:27:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-09-08 06:27:44,852 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2019-09-08 06:27:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:44,853 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-09-08 06:27:44,853 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:27:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-09-08 06:27:44,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-08 06:27:44,855 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:44,855 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:44,856 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:44,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2019-09-08 06:27:44,858 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:44,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:44,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:44,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:44,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-08 06:27:45,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:45,031 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) [2019-09-08 06:27:45,057 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:45,073 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:27:45,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:45,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:27:45,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-08 06:27:45,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:45,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-09-08 06:27:45,122 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 06:27:45,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 06:27:45,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:27:45,124 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2019-09-08 06:27:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:45,226 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2019-09-08 06:27:45,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 06:27:45,227 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-09-08 06:27:45,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:45,228 INFO L225 Difference]: With dead ends: 34 [2019-09-08 06:27:45,228 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 06:27:45,229 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:27:45,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 06:27:45,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 06:27:45,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:27:45,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-09-08 06:27:45,236 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2019-09-08 06:27:45,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:45,236 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-09-08 06:27:45,236 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 06:27:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-09-08 06:27:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-08 06:27:45,238 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:45,238 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:45,238 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:45,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2019-09-08 06:27:45,239 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:45,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:45,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:45,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:45,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-08 06:27:45,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:45,364 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) [2019-09-08 06:27:45,378 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:45,401 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-08 06:27:45,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:45,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-08 06:27:45,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-08 06:27:45,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:45,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2019-09-08 06:27:45,604 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 06:27:45,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 06:27:45,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2019-09-08 06:27:45,605 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 23 states. [2019-09-08 06:27:45,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:45,922 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2019-09-08 06:27:45,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 06:27:45,923 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2019-09-08 06:27:45,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:45,925 INFO L225 Difference]: With dead ends: 37 [2019-09-08 06:27:45,925 INFO L226 Difference]: Without dead ends: 33 [2019-09-08 06:27:45,927 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 06:27:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-08 06:27:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-08 06:27:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-08 06:27:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-09-08 06:27:45,937 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2019-09-08 06:27:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:45,938 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-09-08 06:27:45,938 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 06:27:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-09-08 06:27:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-08 06:27:45,940 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:45,940 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:45,941 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:45,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2019-09-08 06:27:45,941 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:45,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:45,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:45,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:45,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-08 06:27:46,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:46,081 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:27:46,101 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:46,140 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-08 06:27:46,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:46,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:27:46,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-08 06:27:46,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:46,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2019-09-08 06:27:46,188 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:27:46,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:27:46,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:27:46,189 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2019-09-08 06:27:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:46,320 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2019-09-08 06:27:46,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:27:46,320 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2019-09-08 06:27:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:46,322 INFO L225 Difference]: With dead ends: 40 [2019-09-08 06:27:46,322 INFO L226 Difference]: Without dead ends: 36 [2019-09-08 06:27:46,323 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:27:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-08 06:27:46,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-08 06:27:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-08 06:27:46,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-09-08 06:27:46,329 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2019-09-08 06:27:46,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:46,329 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-09-08 06:27:46,329 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:27:46,330 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-09-08 06:27:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-08 06:27:46,331 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:46,331 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:46,331 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:46,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:46,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2019-09-08 06:27:46,332 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:46,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:46,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:46,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:46,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-08 06:27:46,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:46,460 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:46,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:46,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 06:27:46,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-08 06:27:46,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:46,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-09-08 06:27:46,543 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:27:46,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:27:46,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:27:46,544 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2019-09-08 06:27:46,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:46,697 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2019-09-08 06:27:46,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:27:46,701 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2019-09-08 06:27:46,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:46,702 INFO L225 Difference]: With dead ends: 43 [2019-09-08 06:27:46,703 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:27:46,703 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:27:46,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:27:46,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 06:27:46,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:27:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-09-08 06:27:46,710 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2019-09-08 06:27:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:46,711 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-09-08 06:27:46,711 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:27:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-09-08 06:27:46,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-08 06:27:46,712 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:46,712 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:46,713 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:46,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:46,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2019-09-08 06:27:46,713 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:46,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:46,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:46,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:46,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-08 06:27:46,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:46,857 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:46,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:27:46,892 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:27:46,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:46,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-08 06:27:46,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-08 06:27:46,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:46,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2019-09-08 06:27:46,926 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:27:46,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:27:46,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:27:46,926 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2019-09-08 06:27:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:47,082 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2019-09-08 06:27:47,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 06:27:47,083 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2019-09-08 06:27:47,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:47,084 INFO L225 Difference]: With dead ends: 46 [2019-09-08 06:27:47,084 INFO L226 Difference]: Without dead ends: 42 [2019-09-08 06:27:47,085 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2019-09-08 06:27:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-08 06:27:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-08 06:27:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:27:47,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-09-08 06:27:47,091 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2019-09-08 06:27:47,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:47,092 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-09-08 06:27:47,092 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:27:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-09-08 06:27:47,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-08 06:27:47,093 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:47,094 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:47,094 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:47,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:47,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2019-09-08 06:27:47,095 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:47,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:47,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:47,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:47,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-09-08 06:27:47,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:47,226 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:27:47,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:47,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-08 06:27:47,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:47,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 06:27:47,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-09-08 06:27:47,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:47,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2019-09-08 06:27:47,662 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-08 06:27:47,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-08 06:27:47,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 06:27:47,663 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2019-09-08 06:27:48,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:48,179 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2019-09-08 06:27:48,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 06:27:48,179 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2019-09-08 06:27:48,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:48,181 INFO L225 Difference]: With dead ends: 49 [2019-09-08 06:27:48,181 INFO L226 Difference]: Without dead ends: 45 [2019-09-08 06:27:48,186 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2019-09-08 06:27:48,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-08 06:27:48,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-08 06:27:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-08 06:27:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-09-08 06:27:48,192 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2019-09-08 06:27:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:48,193 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-09-08 06:27:48,193 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-08 06:27:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-09-08 06:27:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-08 06:27:48,194 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:48,195 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:48,195 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:48,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:48,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2019-09-08 06:27:48,196 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:48,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:48,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:48,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:48,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-08 06:27:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-08 06:27:48,246 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-08 06:27:48,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 06:27:48 BoogieIcfgContainer [2019-09-08 06:27:48,281 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 06:27:48,284 INFO L168 Benchmark]: Toolchain (without parser) took 5801.31 ms. Allocated memory was 132.6 MB in the beginning and 307.8 MB in the end (delta: 175.1 MB). Free memory was 88.5 MB in the beginning and 177.8 MB in the end (delta: -89.3 MB). Peak memory consumption was 85.8 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:48,285 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 132.6 MB. Free memory was 107.1 MB in the beginning and 106.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-08 06:27:48,286 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.97 ms. Allocated memory is still 132.6 MB. Free memory was 88.3 MB in the beginning and 79.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:48,287 INFO L168 Benchmark]: Boogie Preprocessor took 136.23 ms. Allocated memory was 132.6 MB in the beginning and 201.3 MB in the end (delta: 68.7 MB). Free memory was 79.3 MB in the beginning and 177.9 MB in the end (delta: -98.6 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:48,287 INFO L168 Benchmark]: RCFGBuilder took 206.89 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 167.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:48,288 INFO L168 Benchmark]: TraceAbstraction took 5176.43 ms. Allocated memory was 201.3 MB in the beginning and 307.8 MB in the end (delta: 106.4 MB). Free memory was 166.8 MB in the beginning and 177.8 MB in the end (delta: -10.9 MB). Peak memory consumption was 95.5 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:48,292 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 132.6 MB. Free memory was 107.1 MB in the beginning and 106.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.97 ms. Allocated memory is still 132.6 MB. Free memory was 88.3 MB in the beginning and 79.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 136.23 ms. Allocated memory was 132.6 MB in the beginning and 201.3 MB in the end (delta: 68.7 MB). Free memory was 79.3 MB in the beginning and 177.9 MB in the end (delta: -98.6 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 206.89 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 167.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5176.43 ms. Allocated memory was 201.3 MB in the beginning and 307.8 MB in the end (delta: 106.4 MB). Free memory was 166.8 MB in the beginning and 177.8 MB in the end (delta: -10.9 MB). Peak memory consumption was 95.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 10; VAL [input=10] [L11] CALL, EXPR id(input) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=10, input=10] [L11] int result = id(input); [L12] COND TRUE result == 10 VAL [input=10, result=10] [L13] __VERIFIER_error() VAL [input=10, result=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 5.1s OverallTime, 11 OverallIterations, 11 TraceHistogramMax, 2.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 131 SDtfs, 146 SDslu, 966 SDs, 0 SdLazy, 626 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 590 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, 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: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 860 NumberOfCodeBlocks, 855 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 768 ConstructedInterpolants, 0 QuantifiedInterpolants, 83784 SizeOfPredicates, 43 NumberOfNonLiveVariables, 898 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 900/1800 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...