java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/overflow_true-unreach-call1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 22:27:09,506 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:27:09,509 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:27:09,528 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:27:09,528 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:27:09,529 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:27:09,531 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:27:09,538 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:27:09,541 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:27:09,543 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:27:09,544 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:27:09,544 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:27:09,546 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:27:09,548 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:27:09,551 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:27:09,551 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:27:09,552 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:27:09,554 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:27:09,556 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:27:09,558 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:27:09,559 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:27:09,560 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:27:09,583 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-26 22:27:09,603 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-26 22:27:09,630 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:27:09,630 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:27:09,631 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:27:09,631 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 22:27:09,632 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 22:27:09,633 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 22:27:09,633 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 22:27:09,633 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:27:09,634 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:27:09,634 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:27:09,634 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:27:09,634 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:27:09,635 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:27:09,635 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:27:09,636 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:27:09,636 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:27:09,636 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:27:09,636 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:27:09,637 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:27:09,637 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:27:09,637 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:27:09,637 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:27:09,637 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:27:09,639 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 22:27:09,639 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:27:09,639 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:27:09,639 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 22:27:09,640 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 22:27:09,696 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:27:09,709 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:27:09,713 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:27:09,714 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:27:09,715 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:27:09,716 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/overflow_true-unreach-call1.i [2018-10-26 22:27:09,773 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9177709db/b9f89b48525f40d7800d5b74937c6eab/FLAG288f0a0c3 [2018-10-26 22:27:10,190 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:27:10,191 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/overflow_true-unreach-call1.i [2018-10-26 22:27:10,197 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9177709db/b9f89b48525f40d7800d5b74937c6eab/FLAG288f0a0c3 [2018-10-26 22:27:10,212 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9177709db/b9f89b48525f40d7800d5b74937c6eab [2018-10-26 22:27:10,222 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:27:10,224 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 22:27:10,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:27:10,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:27:10,229 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:27:10,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:27:10" (1/1) ... [2018-10-26 22:27:10,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e4e31e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:27:10, skipping insertion in model container [2018-10-26 22:27:10,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:27:10" (1/1) ... [2018-10-26 22:27:10,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:27:10,262 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:27:10,430 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:27:10,434 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:27:10,451 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:27:10,467 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:27:10,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:27:10 WrapperNode [2018-10-26 22:27:10,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:27:10,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 22:27:10,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 22:27:10,468 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 22:27:10,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:27:10" (1/1) ... [2018-10-26 22:27:10,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:27:10" (1/1) ... [2018-10-26 22:27:10,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 22:27:10,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:27:10,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:27:10,504 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:27:10,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:27:10" (1/1) ... [2018-10-26 22:27:10,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:27:10" (1/1) ... [2018-10-26 22:27:10,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:27:10" (1/1) ... [2018-10-26 22:27:10,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:27:10" (1/1) ... [2018-10-26 22:27:10,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:27:10" (1/1) ... [2018-10-26 22:27:10,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:27:10" (1/1) ... [2018-10-26 22:27:10,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:27:10" (1/1) ... [2018-10-26 22:27:10,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:27:10,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:27:10,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:27:10,525 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:27:10,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:27:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 22:27:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:27:10,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:27:10,885 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:27:10,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:27:10 BoogieIcfgContainer [2018-10-26 22:27:10,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:27:10,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:27:10,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:27:10,890 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:27:10,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:27:10" (1/3) ... [2018-10-26 22:27:10,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a10cabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:27:10, skipping insertion in model container [2018-10-26 22:27:10,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:27:10" (2/3) ... [2018-10-26 22:27:10,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a10cabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:27:10, skipping insertion in model container [2018-10-26 22:27:10,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:27:10" (3/3) ... [2018-10-26 22:27:10,894 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow_true-unreach-call1.i [2018-10-26 22:27:10,903 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:27:10,911 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 22:27:10,928 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 22:27:10,959 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 22:27:10,960 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:27:10,960 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:27:10,960 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:27:10,960 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:27:10,960 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:27:10,960 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:27:10,961 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:27:10,961 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:27:10,974 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-26 22:27:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-26 22:27:10,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:27:10,980 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-26 22:27:10,982 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:27:10,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:27:10,988 INFO L82 PathProgramCache]: Analyzing trace with hash 889783783, now seen corresponding path program 1 times [2018-10-26 22:27:10,990 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:27:10,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:27:11,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:11,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:27:11,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:11,108 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:27:11,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 22:27:11,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 22:27:11,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 22:27:11,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 22:27:11,130 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2018-10-26 22:27:11,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:27:11,146 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-26 22:27:11,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 22:27:11,147 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-26 22:27:11,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:27:11,157 INFO L225 Difference]: With dead ends: 20 [2018-10-26 22:27:11,158 INFO L226 Difference]: Without dead ends: 8 [2018-10-26 22:27:11,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 22:27:11,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-26 22:27:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-26 22:27:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-26 22:27:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-26 22:27:11,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-26 22:27:11,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:27:11,195 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-26 22:27:11,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 22:27:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-26 22:27:11,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-26 22:27:11,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:27:11,196 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:27:11,196 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:27:11,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:27:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1805923659, now seen corresponding path program 1 times [2018-10-26 22:27:11,197 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:27:11,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:27:11,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:11,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:27:11,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:11,322 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:27:11,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 22:27:11,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 22:27:11,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 22:27:11,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 22:27:11,326 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 3 states. [2018-10-26 22:27:11,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:27:11,400 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-26 22:27:11,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 22:27:11,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-26 22:27:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:27:11,401 INFO L225 Difference]: With dead ends: 14 [2018-10-26 22:27:11,402 INFO L226 Difference]: Without dead ends: 10 [2018-10-26 22:27:11,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 22:27:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-26 22:27:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-26 22:27:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-26 22:27:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-26 22:27:11,407 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-26 22:27:11,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:27:11,409 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-26 22:27:11,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 22:27:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-26 22:27:11,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-26 22:27:11,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:27:11,411 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:27:11,411 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:27:11,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:27:11,411 INFO L82 PathProgramCache]: Analyzing trace with hash 373599493, now seen corresponding path program 1 times [2018-10-26 22:27:11,412 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:27:11,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:27:11,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:11,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:27:11,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:11,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:27:11,558 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 22:27:11,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:27:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:11,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:27:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:11,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:27:11,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-26 22:27:11,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 22:27:11,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 22:27:11,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-26 22:27:11,672 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2018-10-26 22:27:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:27:11,713 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-26 22:27:11,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 22:27:11,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-26 22:27:11,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:27:11,715 INFO L225 Difference]: With dead ends: 16 [2018-10-26 22:27:11,715 INFO L226 Difference]: Without dead ends: 12 [2018-10-26 22:27:11,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-26 22:27:11,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-26 22:27:11,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-26 22:27:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-26 22:27:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-26 22:27:11,719 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-10-26 22:27:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:27:11,719 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-26 22:27:11,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 22:27:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-26 22:27:11,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 22:27:11,720 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:27:11,720 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-10-26 22:27:11,721 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:27:11,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:27:11,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1700389313, now seen corresponding path program 2 times [2018-10-26 22:27:11,721 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:27:11,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:27:11,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:11,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:27:11,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:11,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:27:11,862 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:27:11,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:27:11,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:27:11,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:27:11,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:27:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:11,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:27:11,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-26 22:27:11,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:27:11,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:27:11,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:27:11,943 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-10-26 22:27:12,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:27:12,091 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-26 22:27:12,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:27:12,091 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-26 22:27:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:27:12,092 INFO L225 Difference]: With dead ends: 18 [2018-10-26 22:27:12,092 INFO L226 Difference]: Without dead ends: 14 [2018-10-26 22:27:12,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:27:12,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-26 22:27:12,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-26 22:27:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-26 22:27:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-26 22:27:12,096 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-26 22:27:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:27:12,097 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-26 22:27:12,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:27:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-26 22:27:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 22:27:12,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:27:12,098 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2018-10-26 22:27:12,098 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:27:12,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:27:12,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1938806535, now seen corresponding path program 3 times [2018-10-26 22:27:12,099 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:27:12,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:27:12,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:12,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:27:12,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:12,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:27:12,397 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 22:27:12,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:27:12,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 22:27:12,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:27:12,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:27:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:12,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:27:12,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-26 22:27:12,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 22:27:12,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 22:27:12,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:27:12,487 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-10-26 22:27:12,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:27:12,531 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-26 22:27:12,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 22:27:12,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-26 22:27:12,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:27:12,533 INFO L225 Difference]: With dead ends: 20 [2018-10-26 22:27:12,533 INFO L226 Difference]: Without dead ends: 16 [2018-10-26 22:27:12,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:27:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-26 22:27:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-26 22:27:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-26 22:27:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-26 22:27:12,537 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-26 22:27:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:27:12,537 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-26 22:27:12,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 22:27:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-26 22:27:12,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-26 22:27:12,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:27:12,539 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2018-10-26 22:27:12,539 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:27:12,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:27:12,539 INFO L82 PathProgramCache]: Analyzing trace with hash 870477107, now seen corresponding path program 4 times [2018-10-26 22:27:12,539 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:27:12,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:27:12,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:12,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:27:12,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:12,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:27:12,681 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 22:27:12,689 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:27:12,699 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:27:12,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:27:12,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:27:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:12,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:27:12,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-26 22:27:12,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 22:27:12,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 22:27:12,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:27:12,779 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2018-10-26 22:27:12,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:27:12,862 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-26 22:27:12,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 22:27:12,862 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-10-26 22:27:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:27:12,864 INFO L225 Difference]: With dead ends: 22 [2018-10-26 22:27:12,864 INFO L226 Difference]: Without dead ends: 18 [2018-10-26 22:27:12,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:27:12,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-26 22:27:12,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-26 22:27:12,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-26 22:27:12,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-26 22:27:12,869 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-26 22:27:12,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:27:12,869 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-26 22:27:12,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 22:27:12,870 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-26 22:27:12,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-26 22:27:12,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:27:12,871 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2018-10-26 22:27:12,871 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:27:12,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:27:12,871 INFO L82 PathProgramCache]: Analyzing trace with hash -942372115, now seen corresponding path program 5 times [2018-10-26 22:27:12,871 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:27:12,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:27:12,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:12,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:27:12,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:13,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:27:13,168 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 22:27:13,184 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 [2018-10-26 22:27:13,215 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-26 22:27:13,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:27:13,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:27:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:13,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:27:13,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-26 22:27:13,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 22:27:13,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 22:27:13,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:27:13,259 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2018-10-26 22:27:13,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:27:13,598 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-26 22:27:13,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 22:27:13,599 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-26 22:27:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:27:13,600 INFO L225 Difference]: With dead ends: 24 [2018-10-26 22:27:13,600 INFO L226 Difference]: Without dead ends: 20 [2018-10-26 22:27:13,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:27:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-26 22:27:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-26 22:27:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-26 22:27:13,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-26 22:27:13,604 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-26 22:27:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:27:13,605 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-26 22:27:13,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 22:27:13,605 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-26 22:27:13,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-26 22:27:13,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:27:13,606 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2018-10-26 22:27:13,606 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:27:13,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:27:13,607 INFO L82 PathProgramCache]: Analyzing trace with hash 666247719, now seen corresponding path program 6 times [2018-10-26 22:27:13,607 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:27:13,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:27:13,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:13,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:27:13,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:13,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:27:13,857 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:27:13,866 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:27:25,901 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-26 22:27:25,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:27:25,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:27:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:25,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:27:25,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-26 22:27:25,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 22:27:25,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 22:27:25,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:27:25,946 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2018-10-26 22:27:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:27:26,070 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-26 22:27:26,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 22:27:26,071 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-10-26 22:27:26,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:27:26,072 INFO L225 Difference]: With dead ends: 26 [2018-10-26 22:27:26,072 INFO L226 Difference]: Without dead ends: 22 [2018-10-26 22:27:26,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:27:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-26 22:27:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-26 22:27:26,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-26 22:27:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-26 22:27:26,078 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-26 22:27:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:27:26,078 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-26 22:27:26,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 22:27:26,078 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-26 22:27:26,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-26 22:27:26,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:27:26,079 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1] [2018-10-26 22:27:26,079 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:27:26,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:27:26,080 INFO L82 PathProgramCache]: Analyzing trace with hash 361681633, now seen corresponding path program 7 times [2018-10-26 22:27:26,080 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:27:26,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:27:26,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:26,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:27:26,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:26,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:27:26,301 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 22:27:26,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:27:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:26,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:27:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:26,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:27:26,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-26 22:27:26,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 22:27:26,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 22:27:26,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-26 22:27:26,385 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 10 states. [2018-10-26 22:27:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:27:26,528 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-26 22:27:26,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 22:27:26,529 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2018-10-26 22:27:26,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:27:26,531 INFO L225 Difference]: With dead ends: 28 [2018-10-26 22:27:26,531 INFO L226 Difference]: Without dead ends: 24 [2018-10-26 22:27:26,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-26 22:27:26,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-26 22:27:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-26 22:27:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-26 22:27:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-26 22:27:26,537 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-10-26 22:27:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:27:26,537 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-26 22:27:26,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 22:27:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-26 22:27:26,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-26 22:27:26,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:27:26,538 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1] [2018-10-26 22:27:26,539 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:27:26,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:27:26,539 INFO L82 PathProgramCache]: Analyzing trace with hash -268550885, now seen corresponding path program 8 times [2018-10-26 22:27:26,539 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:27:26,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:27:26,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:26,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:27:26,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:26,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:27:26,793 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 22:27:26,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:27:26,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:27:26,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:27:26,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:27:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:26,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:27:26,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-26 22:27:26,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 22:27:26,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 22:27:26,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:27:26,872 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 11 states. [2018-10-26 22:27:26,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:27:26,974 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-26 22:27:26,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 22:27:26,975 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2018-10-26 22:27:26,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:27:26,976 INFO L225 Difference]: With dead ends: 30 [2018-10-26 22:27:26,976 INFO L226 Difference]: Without dead ends: 26 [2018-10-26 22:27:26,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:27:26,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-26 22:27:26,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-26 22:27:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-26 22:27:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-26 22:27:26,981 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-10-26 22:27:26,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:27:26,982 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-26 22:27:26,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 22:27:26,982 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-26 22:27:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-26 22:27:26,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:27:26,983 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1] [2018-10-26 22:27:26,983 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:27:26,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:27:26,984 INFO L82 PathProgramCache]: Analyzing trace with hash -331611947, now seen corresponding path program 9 times [2018-10-26 22:27:26,984 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:27:26,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:27:26,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:26,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:27:26,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:27,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:27:27,272 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:27:27,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:27:27,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-26 22:27:27,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:27:27,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:27:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:27,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:27:27,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-26 22:27:27,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 22:27:27,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 22:27:27,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:27:27,367 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2018-10-26 22:27:27,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:27:27,496 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-26 22:27:27,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 22:27:27,497 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2018-10-26 22:27:27,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:27:27,498 INFO L225 Difference]: With dead ends: 32 [2018-10-26 22:27:27,498 INFO L226 Difference]: Without dead ends: 28 [2018-10-26 22:27:27,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:27:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-26 22:27:27,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-26 22:27:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-26 22:27:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-26 22:27:27,504 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-10-26 22:27:27,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:27:27,504 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-26 22:27:27,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 22:27:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-26 22:27:27,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-26 22:27:27,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:27:27,505 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1] [2018-10-26 22:27:27,505 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:27:27,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:27:27,506 INFO L82 PathProgramCache]: Analyzing trace with hash -803750385, now seen corresponding path program 10 times [2018-10-26 22:27:27,506 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:27:27,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:27:27,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:27,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:27:27,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:28,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:27:28,120 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:27:28,136 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:27:28,157 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:27:28,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:27:28,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:27:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:28,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:27:28,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-26 22:27:28,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 22:27:28,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 22:27:28,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:27:28,207 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 13 states. [2018-10-26 22:27:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:27:28,520 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-26 22:27:28,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 22:27:28,522 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2018-10-26 22:27:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:27:28,523 INFO L225 Difference]: With dead ends: 34 [2018-10-26 22:27:28,523 INFO L226 Difference]: Without dead ends: 30 [2018-10-26 22:27:28,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:27:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-26 22:27:28,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-26 22:27:28,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-26 22:27:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-26 22:27:28,528 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-10-26 22:27:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:27:28,528 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-26 22:27:28,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 22:27:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-26 22:27:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-26 22:27:28,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:27:28,529 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1] [2018-10-26 22:27:28,530 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:27:28,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:27:28,530 INFO L82 PathProgramCache]: Analyzing trace with hash 737744073, now seen corresponding path program 11 times [2018-10-26 22:27:28,530 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:27:28,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:27:28,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:28,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:27:28,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:27:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:27:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:27:28,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:27:28,960 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:27:28,970 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:28:19,235 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-26 22:28:19,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:28:20,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:28:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:28:20,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:28:20,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-26 22:28:20,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 22:28:20,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 22:28:20,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:28:20,612 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 14 states. [2018-10-26 22:28:20,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:28:20,764 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-26 22:28:20,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 22:28:20,765 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2018-10-26 22:28:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:28:20,767 INFO L225 Difference]: With dead ends: 36 [2018-10-26 22:28:20,767 INFO L226 Difference]: Without dead ends: 32 [2018-10-26 22:28:20,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:28:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-26 22:28:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-26 22:28:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-26 22:28:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-26 22:28:20,774 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-10-26 22:28:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:28:20,775 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-26 22:28:20,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 22:28:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-26 22:28:20,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-26 22:28:20,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:28:20,776 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1] [2018-10-26 22:28:20,776 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:28:20,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:28:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash 350201091, now seen corresponding path program 12 times [2018-10-26 22:28:20,777 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:28:20,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:28:20,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:28:20,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:28:20,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:28:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:28:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:28:21,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:28:21,130 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:28:21,137 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:28:45,179 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-26 22:28:45,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:28:45,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:28:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:28:45,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:28:45,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-26 22:28:45,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-26 22:28:45,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-26 22:28:45,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-26 22:28:45,235 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 15 states. [2018-10-26 22:28:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:28:45,463 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-26 22:28:45,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 22:28:45,463 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2018-10-26 22:28:45,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:28:45,464 INFO L225 Difference]: With dead ends: 38 [2018-10-26 22:28:45,464 INFO L226 Difference]: Without dead ends: 34 [2018-10-26 22:28:45,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-26 22:28:45,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-26 22:28:45,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-26 22:28:45,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-26 22:28:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-26 22:28:45,469 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-10-26 22:28:45,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:28:45,469 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-26 22:28:45,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-26 22:28:45,469 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-26 22:28:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-26 22:28:45,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:28:45,470 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1] [2018-10-26 22:28:45,470 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:28:45,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:28:45,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1583550141, now seen corresponding path program 13 times [2018-10-26 22:28:45,471 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:28:45,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:28:45,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:28:45,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:28:45,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:28:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:28:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:28:45,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:28:45,746 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:28:45,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:28:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:28:45,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:28:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:28:45,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:28:45,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-26 22:28:45,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 22:28:45,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 22:28:45,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:28:45,809 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 16 states. [2018-10-26 22:28:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:28:46,104 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-26 22:28:46,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 22:28:46,104 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-10-26 22:28:46,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:28:46,105 INFO L225 Difference]: With dead ends: 40 [2018-10-26 22:28:46,106 INFO L226 Difference]: Without dead ends: 36 [2018-10-26 22:28:46,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:28:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-26 22:28:46,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-26 22:28:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-26 22:28:46,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-26 22:28:46,112 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-10-26 22:28:46,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:28:46,113 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-26 22:28:46,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 22:28:46,113 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-26 22:28:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-26 22:28:46,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:28:46,114 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1] [2018-10-26 22:28:46,114 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:28:46,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:28:46,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1421013495, now seen corresponding path program 14 times [2018-10-26 22:28:46,115 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:28:46,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:28:46,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:28:46,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:28:46,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:28:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:28:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:28:46,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:28:46,916 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:28:46,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:28:46,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:28:46,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:28:46,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:28:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:28:47,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:28:47,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-26 22:28:47,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 22:28:47,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 22:28:47,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:28:47,005 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 17 states. [2018-10-26 22:28:47,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:28:47,490 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-26 22:28:47,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 22:28:47,491 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2018-10-26 22:28:47,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:28:47,491 INFO L225 Difference]: With dead ends: 42 [2018-10-26 22:28:47,492 INFO L226 Difference]: Without dead ends: 38 [2018-10-26 22:28:47,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:28:47,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-26 22:28:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-26 22:28:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-26 22:28:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-26 22:28:47,497 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-10-26 22:28:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:28:47,497 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-26 22:28:47,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 22:28:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-26 22:28:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-26 22:28:47,498 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:28:47,498 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1] [2018-10-26 22:28:47,499 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:28:47,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:28:47,499 INFO L82 PathProgramCache]: Analyzing trace with hash -157880655, now seen corresponding path program 15 times [2018-10-26 22:28:47,499 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:28:47,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:28:47,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:28:47,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:28:47,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:28:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:28:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:28:47,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:28:47,860 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:28:47,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:28:47,929 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-26 22:28:47,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:28:47,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:28:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:28:48,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:28:48,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-26 22:28:48,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-26 22:28:48,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-26 22:28:48,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:28:48,014 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 18 states. [2018-10-26 22:28:48,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:28:48,496 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-26 22:28:48,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 22:28:48,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2018-10-26 22:28:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:28:48,497 INFO L225 Difference]: With dead ends: 44 [2018-10-26 22:28:48,497 INFO L226 Difference]: Without dead ends: 40 [2018-10-26 22:28:48,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:28:48,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-26 22:28:48,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-26 22:28:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-26 22:28:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-26 22:28:48,506 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-10-26 22:28:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:28:48,507 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-26 22:28:48,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-26 22:28:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-26 22:28:48,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-26 22:28:48,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:28:48,508 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1] [2018-10-26 22:28:48,508 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:28:48,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:28:48,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1351703317, now seen corresponding path program 16 times [2018-10-26 22:28:48,508 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:28:48,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:28:48,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:28:48,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:28:48,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:28:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:28:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:28:48,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:28:48,937 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:28:48,944 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:28:48,971 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:28:48,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:28:48,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:28:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:28:49,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:28:49,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-26 22:28:49,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-26 22:28:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-26 22:28:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-26 22:28:49,095 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 19 states. [2018-10-26 22:28:49,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:28:49,371 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-26 22:28:49,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 22:28:49,371 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2018-10-26 22:28:49,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:28:49,372 INFO L225 Difference]: With dead ends: 46 [2018-10-26 22:28:49,372 INFO L226 Difference]: Without dead ends: 42 [2018-10-26 22:28:49,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-26 22:28:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-26 22:28:49,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-26 22:28:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-26 22:28:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-26 22:28:49,378 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-10-26 22:28:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:28:49,378 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-26 22:28:49,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-26 22:28:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-26 22:28:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-26 22:28:49,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:28:49,379 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1] [2018-10-26 22:28:49,380 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:28:49,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:28:49,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1859013467, now seen corresponding path program 17 times [2018-10-26 22:28:49,380 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:28:49,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:28:49,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:28:49,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:28:49,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:28:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:28:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:28:49,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:28:49,682 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:28:49,696 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:30:38,196 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-26 22:30:38,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:30:39,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:39,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:39,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-26 22:30:39,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-26 22:30:39,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-26 22:30:39,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:30:39,274 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 20 states. [2018-10-26 22:30:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:30:39,980 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-26 22:30:39,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 22:30:39,980 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-10-26 22:30:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:30:39,981 INFO L225 Difference]: With dead ends: 48 [2018-10-26 22:30:39,981 INFO L226 Difference]: Without dead ends: 44 [2018-10-26 22:30:39,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:30:39,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-26 22:30:39,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-26 22:30:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-26 22:30:39,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-26 22:30:39,985 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-10-26 22:30:39,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:30:39,985 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-26 22:30:39,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-26 22:30:39,985 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-26 22:30:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-26 22:30:39,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:30:39,986 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1] [2018-10-26 22:30:39,986 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:30:39,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:30:39,987 INFO L82 PathProgramCache]: Analyzing trace with hash 242204127, now seen corresponding path program 18 times [2018-10-26 22:30:39,987 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:30:39,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:30:39,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:39,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:30:39,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:40,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:40,873 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:40,880 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:31:55,447 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-26 22:31:55,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:55,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:55,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:55,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-26 22:31:55,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 22:31:55,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 22:31:55,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-26 22:31:55,770 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 21 states. [2018-10-26 22:31:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:56,084 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-26 22:31:56,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-26 22:31:56,084 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2018-10-26 22:31:56,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:56,085 INFO L225 Difference]: With dead ends: 50 [2018-10-26 22:31:56,085 INFO L226 Difference]: Without dead ends: 46 [2018-10-26 22:31:56,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-26 22:31:56,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-26 22:31:56,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-26 22:31:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-26 22:31:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-26 22:31:56,092 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-10-26 22:31:56,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:56,092 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-26 22:31:56,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 22:31:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-26 22:31:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-26 22:31:56,093 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:56,093 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:56,093 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:56,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:56,093 INFO L82 PathProgramCache]: Analyzing trace with hash 877682841, now seen corresponding path program 19 times [2018-10-26 22:31:56,094 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:56,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:56,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:56,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:56,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:56,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:56,489 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:56,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:56,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:56,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:56,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-26 22:31:56,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-26 22:31:56,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-26 22:31:56,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-26 22:31:56,564 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 22 states. Received shutdown request... [2018-10-26 22:31:56,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 22:31:56,819 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 22:31:56,824 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 22:31:56,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 10:31:56 BoogieIcfgContainer [2018-10-26 22:31:56,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 22:31:56,826 INFO L168 Benchmark]: Toolchain (without parser) took 286602.57 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 893.9 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -397.8 MB). Peak memory consumption was 496.1 MB. Max. memory is 7.1 GB. [2018-10-26 22:31:56,827 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:31:56,828 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-26 22:31:56,828 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.48 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:31:56,829 INFO L168 Benchmark]: Boogie Preprocessor took 20.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:31:56,829 INFO L168 Benchmark]: RCFGBuilder took 361.86 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 779.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -817.9 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-26 22:31:56,830 INFO L168 Benchmark]: TraceAbstraction took 285937.91 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 114.8 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 409.6 MB). Peak memory consumption was 524.4 MB. Max. memory is 7.1 GB. [2018-10-26 22:31:56,834 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 35.48 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 361.86 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 779.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -817.9 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 285937.91 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 114.8 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 409.6 MB). Peak memory consumption was 524.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 4]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 4). Cancelled while BasicCegarLoop was constructing difference of abstraction (46states) and FLOYD_HOARE automaton (currently 18 states, 22 states before enhancement),while ReachableStatesComputation was computing reachable states (32 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 285.8s OverallTime, 21 OverallIterations, 20 TraceHistogramMax, 4.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 333 SDtfs, 0 SDslu, 3156 SDs, 0 SdLazy, 3359 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 766 GetRequests, 516 SyntacticMatches, 40 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=20, 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, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 269.9s SatisfiabilityAnalysisTime, 9.9s InterpolantComputationTime, 1039 NumberOfCodeBlocks, 1039 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 999 ConstructedInterpolants, 0 QuantifiedInterpolants, 188157 SizeOfPredicates, 19 NumberOfNonLiveVariables, 1026 ConjunctsInSsa, 438 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/5320 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown