java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label48_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 21:27:31,517 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 21:27:31,521 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 21:27:31,540 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 21:27:31,540 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 21:27:31,541 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 21:27:31,542 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 21:27:31,545 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 21:27:31,546 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 21:27:31,547 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 21:27:31,548 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 21:27:31,548 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 21:27:31,549 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 21:27:31,552 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 21:27:31,553 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 21:27:31,554 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 21:27:31,555 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 21:27:31,562 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 21:27:31,566 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 21:27:31,570 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 21:27:31,572 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 21:27:31,573 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 21:27:31,576 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-06 21:27:31,592 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 21:27:31,622 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 21:27:31,623 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 21:27:31,626 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 21:27:31,626 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 21:27:31,627 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 21:27:31,627 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 21:27:31,627 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 21:27:31,628 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 21:27:31,628 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 21:27:31,628 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 21:27:31,628 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 21:27:31,628 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 21:27:31,629 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 21:27:31,629 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 21:27:31,629 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 21:27:31,629 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 21:27:31,629 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 21:27:31,631 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 21:27:31,631 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 21:27:31,631 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 21:27:31,632 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 21:27:31,632 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 21:27:31,632 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 21:27:31,633 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 21:27:31,633 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 21:27:31,633 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 21:27:31,633 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 21:27:31,633 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 21:27:31,697 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 21:27:31,714 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 21:27:31,718 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 21:27:31,720 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 21:27:31,721 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 21:27:31,721 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label48_true-unreach-call_false-termination.c [2018-11-06 21:27:31,789 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44a6fc2a9/5ccfb31713fa4057808eaf12a47169b3/FLAG322500bb2 [2018-11-06 21:27:32,346 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 21:27:32,349 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label48_true-unreach-call_false-termination.c [2018-11-06 21:27:32,363 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44a6fc2a9/5ccfb31713fa4057808eaf12a47169b3/FLAG322500bb2 [2018-11-06 21:27:32,379 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44a6fc2a9/5ccfb31713fa4057808eaf12a47169b3 [2018-11-06 21:27:32,390 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 21:27:32,392 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 21:27:32,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 21:27:32,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 21:27:32,398 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 21:27:32,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:27:32" (1/1) ... [2018-11-06 21:27:32,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f80c201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:32, skipping insertion in model container [2018-11-06 21:27:32,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:27:32" (1/1) ... [2018-11-06 21:27:32,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 21:27:32,476 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 21:27:33,019 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 21:27:33,028 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 21:27:33,187 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 21:27:33,205 INFO L193 MainTranslator]: Completed translation [2018-11-06 21:27:33,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:33 WrapperNode [2018-11-06 21:27:33,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 21:27:33,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 21:27:33,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 21:27:33,207 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 21:27:33,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:33" (1/1) ... [2018-11-06 21:27:33,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:33" (1/1) ... [2018-11-06 21:27:33,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 21:27:33,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 21:27:33,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 21:27:33,416 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 21:27:33,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:33" (1/1) ... [2018-11-06 21:27:33,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:33" (1/1) ... [2018-11-06 21:27:33,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:33" (1/1) ... [2018-11-06 21:27:33,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:33" (1/1) ... [2018-11-06 21:27:33,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:33" (1/1) ... [2018-11-06 21:27:33,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:33" (1/1) ... [2018-11-06 21:27:33,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:33" (1/1) ... [2018-11-06 21:27:33,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 21:27:33,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 21:27:33,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 21:27:33,532 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 21:27:33,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 21:27:33,609 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-06 21:27:33,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 21:27:33,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 21:27:37,260 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 21:27:37,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:27:37 BoogieIcfgContainer [2018-11-06 21:27:37,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 21:27:37,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 21:27:37,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 21:27:37,267 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 21:27:37,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:27:32" (1/3) ... [2018-11-06 21:27:37,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4c4007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:27:37, skipping insertion in model container [2018-11-06 21:27:37,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:33" (2/3) ... [2018-11-06 21:27:37,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4c4007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:27:37, skipping insertion in model container [2018-11-06 21:27:37,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:27:37" (3/3) ... [2018-11-06 21:27:37,273 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label48_true-unreach-call_false-termination.c [2018-11-06 21:27:37,287 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 21:27:37,298 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 21:27:37,318 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 21:27:37,360 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 21:27:37,361 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 21:27:37,361 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 21:27:37,361 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 21:27:37,362 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 21:27:37,362 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 21:27:37,362 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 21:27:37,362 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 21:27:37,363 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 21:27:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states. [2018-11-06 21:27:37,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-06 21:27:37,400 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:27:37,401 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:27:37,404 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:27:37,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:27:37,412 INFO L82 PathProgramCache]: Analyzing trace with hash 861450858, now seen corresponding path program 1 times [2018-11-06 21:27:37,414 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:27:37,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:27:37,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:27:37,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:27:37,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:27:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:27:37,856 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-06 21:27:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 21:27:38,085 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 21:27:38,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-06 21:27:38,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 21:27:38,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 21:27:38,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-11-06 21:27:38,110 INFO L87 Difference]: Start difference. First operand 246 states. Second operand 6 states. [2018-11-06 21:27:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:27:42,181 INFO L93 Difference]: Finished difference Result 1038 states and 1923 transitions. [2018-11-06 21:27:42,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 21:27:42,184 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2018-11-06 21:27:42,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:27:42,210 INFO L225 Difference]: With dead ends: 1038 [2018-11-06 21:27:42,210 INFO L226 Difference]: Without dead ends: 782 [2018-11-06 21:27:42,216 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-11-06 21:27:42,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2018-11-06 21:27:42,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 782. [2018-11-06 21:27:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 782 states. [2018-11-06 21:27:42,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1281 transitions. [2018-11-06 21:27:42,316 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1281 transitions. Word has length 39 [2018-11-06 21:27:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:27:42,316 INFO L480 AbstractCegarLoop]: Abstraction has 782 states and 1281 transitions. [2018-11-06 21:27:42,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 21:27:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1281 transitions. [2018-11-06 21:27:42,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-11-06 21:27:42,334 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:27:42,335 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:27:42,335 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:27:42,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:27:42,336 INFO L82 PathProgramCache]: Analyzing trace with hash -52020750, now seen corresponding path program 1 times [2018-11-06 21:27:42,336 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:27:42,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:27:42,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:27:42,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:27:42,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:27:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:27:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-11-06 21:27:42,705 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 21:27:42,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 21:27:42,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 21:27:42,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 21:27:42,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 21:27:42,708 INFO L87 Difference]: Start difference. First operand 782 states and 1281 transitions. Second operand 4 states. [2018-11-06 21:27:44,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:27:44,737 INFO L93 Difference]: Finished difference Result 1918 states and 3226 transitions. [2018-11-06 21:27:44,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 21:27:44,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 189 [2018-11-06 21:27:44,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:27:44,744 INFO L225 Difference]: With dead ends: 1918 [2018-11-06 21:27:44,745 INFO L226 Difference]: Without dead ends: 1138 [2018-11-06 21:27:44,749 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 21:27:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2018-11-06 21:27:44,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1138. [2018-11-06 21:27:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2018-11-06 21:27:44,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1701 transitions. [2018-11-06 21:27:44,806 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1701 transitions. Word has length 189 [2018-11-06 21:27:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:27:44,806 INFO L480 AbstractCegarLoop]: Abstraction has 1138 states and 1701 transitions. [2018-11-06 21:27:44,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 21:27:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1701 transitions. [2018-11-06 21:27:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-11-06 21:27:44,821 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:27:44,822 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:27:44,822 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:27:44,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:27:44,823 INFO L82 PathProgramCache]: Analyzing trace with hash 107358408, now seen corresponding path program 1 times [2018-11-06 21:27:44,823 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:27:44,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:27:44,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:27:44,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:27:44,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:27:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:27:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 141 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-06 21:27:45,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 21:27:45,175 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 21:27:45,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:27:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:27:45,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 21:27:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-06 21:27:45,423 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 21:27:45,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-11-06 21:27:45,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 21:27:45,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 21:27:45,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-11-06 21:27:45,426 INFO L87 Difference]: Start difference. First operand 1138 states and 1701 transitions. Second operand 6 states. [2018-11-06 21:27:52,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:27:52,236 INFO L93 Difference]: Finished difference Result 4080 states and 6374 transitions. [2018-11-06 21:27:52,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 21:27:52,242 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 212 [2018-11-06 21:27:52,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:27:52,256 INFO L225 Difference]: With dead ends: 4080 [2018-11-06 21:27:52,257 INFO L226 Difference]: Without dead ends: 2763 [2018-11-06 21:27:52,260 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-11-06 21:27:52,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2018-11-06 21:27:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 1853. [2018-11-06 21:27:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1853 states. [2018-11-06 21:27:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 2181 transitions. [2018-11-06 21:27:52,316 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 2181 transitions. Word has length 212 [2018-11-06 21:27:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:27:52,316 INFO L480 AbstractCegarLoop]: Abstraction has 1853 states and 2181 transitions. [2018-11-06 21:27:52,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 21:27:52,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 2181 transitions. [2018-11-06 21:27:52,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-11-06 21:27:52,325 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:27:52,325 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:27:52,326 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:27:52,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:27:52,326 INFO L82 PathProgramCache]: Analyzing trace with hash -281300119, now seen corresponding path program 1 times [2018-11-06 21:27:52,326 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:27:52,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:27:52,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:27:52,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:27:52,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:27:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:27:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2018-11-06 21:27:53,098 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 21:27:53,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 21:27:53,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 21:27:53,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 21:27:53,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 21:27:53,100 INFO L87 Difference]: Start difference. First operand 1853 states and 2181 transitions. Second operand 4 states. [2018-11-06 21:27:54,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:27:54,782 INFO L93 Difference]: Finished difference Result 5852 states and 7101 transitions. [2018-11-06 21:27:54,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 21:27:54,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 414 [2018-11-06 21:27:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:27:54,811 INFO L225 Difference]: With dead ends: 5852 [2018-11-06 21:27:54,811 INFO L226 Difference]: Without dead ends: 4180 [2018-11-06 21:27:54,815 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 21:27:54,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4180 states. [2018-11-06 21:27:54,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4180 to 4001. [2018-11-06 21:27:54,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4001 states. [2018-11-06 21:27:54,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 4667 transitions. [2018-11-06 21:27:54,890 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 4667 transitions. Word has length 414 [2018-11-06 21:27:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:27:54,891 INFO L480 AbstractCegarLoop]: Abstraction has 4001 states and 4667 transitions. [2018-11-06 21:27:54,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 21:27:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 4667 transitions. [2018-11-06 21:27:54,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2018-11-06 21:27:54,905 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:27:54,906 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:27:54,906 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:27:54,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:27:54,907 INFO L82 PathProgramCache]: Analyzing trace with hash -17135963, now seen corresponding path program 1 times [2018-11-06 21:27:54,907 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:27:54,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:27:54,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:27:54,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:27:54,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:27:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:27:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 570 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-11-06 21:27:55,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 21:27:55,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 21:27:55,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 21:27:55,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 21:27:55,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 21:27:55,429 INFO L87 Difference]: Start difference. First operand 4001 states and 4667 transitions. Second operand 4 states. [2018-11-06 21:27:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:27:57,140 INFO L93 Difference]: Finished difference Result 8895 states and 10492 transitions. [2018-11-06 21:27:57,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 21:27:57,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 511 [2018-11-06 21:27:57,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:27:57,167 INFO L225 Difference]: With dead ends: 8895 [2018-11-06 21:27:57,167 INFO L226 Difference]: Without dead ends: 5075 [2018-11-06 21:27:57,172 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 21:27:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2018-11-06 21:27:57,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 5075. [2018-11-06 21:27:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5075 states. [2018-11-06 21:27:57,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 5704 transitions. [2018-11-06 21:27:57,264 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 5704 transitions. Word has length 511 [2018-11-06 21:27:57,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:27:57,265 INFO L480 AbstractCegarLoop]: Abstraction has 5075 states and 5704 transitions. [2018-11-06 21:27:57,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 21:27:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 5704 transitions. [2018-11-06 21:27:57,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2018-11-06 21:27:57,281 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:27:57,281 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:27:57,282 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:27:57,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:27:57,282 INFO L82 PathProgramCache]: Analyzing trace with hash -951535334, now seen corresponding path program 1 times [2018-11-06 21:27:57,282 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:27:57,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:27:57,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:27:57,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:27:57,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:27:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:27:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 652 proven. 46 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-11-06 21:27:58,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 21:27:58,246 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 21:27:58,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:27:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:27:58,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 21:27:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 675 proven. 23 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-11-06 21:27:58,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 21:27:58,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2018-11-06 21:27:58,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 21:27:58,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 21:27:58,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-06 21:27:58,992 INFO L87 Difference]: Start difference. First operand 5075 states and 5704 transitions. Second operand 9 states. [2018-11-06 21:28:04,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:28:04,054 INFO L93 Difference]: Finished difference Result 10228 states and 11489 transitions. [2018-11-06 21:28:04,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 21:28:04,056 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 538 [2018-11-06 21:28:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:28:04,075 INFO L225 Difference]: With dead ends: 10228 [2018-11-06 21:28:04,075 INFO L226 Difference]: Without dead ends: 5154 [2018-11-06 21:28:04,082 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 536 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-11-06 21:28:04,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5154 states. [2018-11-06 21:28:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5154 to 4895. [2018-11-06 21:28:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4895 states. [2018-11-06 21:28:04,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4895 states to 4895 states and 5500 transitions. [2018-11-06 21:28:04,179 INFO L78 Accepts]: Start accepts. Automaton has 4895 states and 5500 transitions. Word has length 538 [2018-11-06 21:28:04,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:28:04,180 INFO L480 AbstractCegarLoop]: Abstraction has 4895 states and 5500 transitions. [2018-11-06 21:28:04,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 21:28:04,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4895 states and 5500 transitions. [2018-11-06 21:28:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2018-11-06 21:28:04,199 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:28:04,199 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:28:04,200 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:28:04,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:28:04,200 INFO L82 PathProgramCache]: Analyzing trace with hash 494488420, now seen corresponding path program 1 times [2018-11-06 21:28:04,200 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:28:04,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:28:04,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:04,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:04,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:04,668 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-06 21:28:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 804 proven. 0 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-11-06 21:28:05,066 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 21:28:05,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 21:28:05,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 21:28:05,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 21:28:05,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 21:28:05,068 INFO L87 Difference]: Start difference. First operand 4895 states and 5500 transitions. Second operand 3 states. [2018-11-06 21:28:06,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:28:06,593 INFO L93 Difference]: Finished difference Result 11757 states and 13435 transitions. [2018-11-06 21:28:06,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 21:28:06,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 625 [2018-11-06 21:28:06,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:28:06,621 INFO L225 Difference]: With dead ends: 11757 [2018-11-06 21:28:06,621 INFO L226 Difference]: Without dead ends: 7043 [2018-11-06 21:28:06,626 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 21:28:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7043 states. [2018-11-06 21:28:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7043 to 7043. [2018-11-06 21:28:06,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7043 states. [2018-11-06 21:28:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7043 states to 7043 states and 8020 transitions. [2018-11-06 21:28:06,734 INFO L78 Accepts]: Start accepts. Automaton has 7043 states and 8020 transitions. Word has length 625 [2018-11-06 21:28:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:28:06,735 INFO L480 AbstractCegarLoop]: Abstraction has 7043 states and 8020 transitions. [2018-11-06 21:28:06,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 21:28:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 7043 states and 8020 transitions. [2018-11-06 21:28:06,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2018-11-06 21:28:06,754 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:28:06,754 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:28:06,754 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:28:06,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:28:06,755 INFO L82 PathProgramCache]: Analyzing trace with hash 555470015, now seen corresponding path program 1 times [2018-11-06 21:28:06,755 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:28:06,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:28:06,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:06,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:06,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:07,354 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2018-11-06 21:28:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 944 proven. 0 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2018-11-06 21:28:07,618 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 21:28:07,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-06 21:28:07,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 21:28:07,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 21:28:07,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-06 21:28:07,619 INFO L87 Difference]: Start difference. First operand 7043 states and 8020 transitions. Second operand 7 states. [2018-11-06 21:28:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:28:09,483 INFO L93 Difference]: Finished difference Result 14677 states and 16709 transitions. [2018-11-06 21:28:09,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 21:28:09,484 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 628 [2018-11-06 21:28:09,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:28:09,513 INFO L225 Difference]: With dead ends: 14677 [2018-11-06 21:28:09,513 INFO L226 Difference]: Without dead ends: 7219 [2018-11-06 21:28:09,519 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-06 21:28:09,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7219 states. [2018-11-06 21:28:09,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7219 to 6861. [2018-11-06 21:28:09,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6861 states. [2018-11-06 21:28:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 7702 transitions. [2018-11-06 21:28:09,616 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 7702 transitions. Word has length 628 [2018-11-06 21:28:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:28:09,617 INFO L480 AbstractCegarLoop]: Abstraction has 6861 states and 7702 transitions. [2018-11-06 21:28:09,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 21:28:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 7702 transitions. [2018-11-06 21:28:09,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2018-11-06 21:28:09,627 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:28:09,628 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:28:09,628 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:28:09,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:28:09,628 INFO L82 PathProgramCache]: Analyzing trace with hash -168330838, now seen corresponding path program 1 times [2018-11-06 21:28:09,629 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:28:09,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:28:09,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:09,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:09,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 1085 proven. 0 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2018-11-06 21:28:10,219 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 21:28:10,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 21:28:10,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 21:28:10,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 21:28:10,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 21:28:10,221 INFO L87 Difference]: Start difference. First operand 6861 states and 7702 transitions. Second operand 3 states. [2018-11-06 21:28:13,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:28:13,377 INFO L93 Difference]: Finished difference Result 15331 states and 17252 transitions. [2018-11-06 21:28:13,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 21:28:13,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 698 [2018-11-06 21:28:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:28:13,396 INFO L225 Difference]: With dead ends: 15331 [2018-11-06 21:28:13,396 INFO L226 Difference]: Without dead ends: 8651 [2018-11-06 21:28:13,404 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 21:28:13,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8651 states. [2018-11-06 21:28:13,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8651 to 8651. [2018-11-06 21:28:13,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8651 states. [2018-11-06 21:28:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 9639 transitions. [2018-11-06 21:28:13,512 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 9639 transitions. Word has length 698 [2018-11-06 21:28:13,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:28:13,513 INFO L480 AbstractCegarLoop]: Abstraction has 8651 states and 9639 transitions. [2018-11-06 21:28:13,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 21:28:13,513 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 9639 transitions. [2018-11-06 21:28:13,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2018-11-06 21:28:13,528 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:28:13,529 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:28:13,529 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:28:13,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:28:13,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1703911156, now seen corresponding path program 1 times [2018-11-06 21:28:13,529 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:28:13,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:28:13,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:13,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:13,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 1434 proven. 0 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-11-06 21:28:14,711 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 21:28:14,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 21:28:14,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 21:28:14,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 21:28:14,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 21:28:14,714 INFO L87 Difference]: Start difference. First operand 8651 states and 9639 transitions. Second operand 4 states. [2018-11-06 21:28:16,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:28:16,787 INFO L93 Difference]: Finished difference Result 18911 states and 21251 transitions. [2018-11-06 21:28:16,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 21:28:16,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 854 [2018-11-06 21:28:16,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:28:16,808 INFO L225 Difference]: With dead ends: 18911 [2018-11-06 21:28:16,811 INFO L226 Difference]: Without dead ends: 10441 [2018-11-06 21:28:16,819 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 21:28:16,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10441 states. [2018-11-06 21:28:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10441 to 10441. [2018-11-06 21:28:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10441 states. [2018-11-06 21:28:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10441 states to 10441 states and 11454 transitions. [2018-11-06 21:28:16,940 INFO L78 Accepts]: Start accepts. Automaton has 10441 states and 11454 transitions. Word has length 854 [2018-11-06 21:28:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:28:16,941 INFO L480 AbstractCegarLoop]: Abstraction has 10441 states and 11454 transitions. [2018-11-06 21:28:16,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 21:28:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 10441 states and 11454 transitions. [2018-11-06 21:28:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2018-11-06 21:28:16,952 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:28:16,952 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:28:16,953 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:28:16,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:28:16,953 INFO L82 PathProgramCache]: Analyzing trace with hash 443681825, now seen corresponding path program 1 times [2018-11-06 21:28:16,953 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:28:16,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:28:16,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:16,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:16,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:17,595 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-06 21:28:17,829 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-06 21:28:18,013 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-06 21:28:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 1595 proven. 201 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2018-11-06 21:28:19,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 21:28:19,350 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 21:28:19,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:19,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 21:28:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 1502 proven. 93 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-11-06 21:28:20,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 21:28:20,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2018-11-06 21:28:20,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 21:28:20,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 21:28:20,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-11-06 21:28:20,589 INFO L87 Difference]: Start difference. First operand 10441 states and 11454 transitions. Second operand 9 states. [2018-11-06 21:28:22,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:28:22,860 INFO L93 Difference]: Finished difference Result 21361 states and 23454 transitions. [2018-11-06 21:28:22,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 21:28:22,862 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 872 [2018-11-06 21:28:22,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:28:22,879 INFO L225 Difference]: With dead ends: 21361 [2018-11-06 21:28:22,879 INFO L226 Difference]: Without dead ends: 11101 [2018-11-06 21:28:22,890 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 871 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-11-06 21:28:22,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2018-11-06 21:28:23,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 10977. [2018-11-06 21:28:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10977 states. [2018-11-06 21:28:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10977 states to 10977 states and 11933 transitions. [2018-11-06 21:28:23,032 INFO L78 Accepts]: Start accepts. Automaton has 10977 states and 11933 transitions. Word has length 872 [2018-11-06 21:28:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:28:23,033 INFO L480 AbstractCegarLoop]: Abstraction has 10977 states and 11933 transitions. [2018-11-06 21:28:23,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 21:28:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 10977 states and 11933 transitions. [2018-11-06 21:28:23,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2018-11-06 21:28:23,045 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:28:23,046 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:28:23,046 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:28:23,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:28:23,047 INFO L82 PathProgramCache]: Analyzing trace with hash -604288664, now seen corresponding path program 1 times [2018-11-06 21:28:23,047 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:28:23,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:28:23,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:23,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:23,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2829 backedges. 1511 proven. 0 refuted. 0 times theorem prover too weak. 1318 trivial. 0 not checked. [2018-11-06 21:28:24,168 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 21:28:24,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-06 21:28:24,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 21:28:24,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 21:28:24,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 21:28:24,169 INFO L87 Difference]: Start difference. First operand 10977 states and 11933 transitions. Second operand 5 states. [2018-11-06 21:28:25,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:28:25,964 INFO L93 Difference]: Finished difference Result 23575 states and 25590 transitions. [2018-11-06 21:28:25,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 21:28:25,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 950 [2018-11-06 21:28:25,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:28:25,988 INFO L225 Difference]: With dead ends: 23575 [2018-11-06 21:28:25,988 INFO L226 Difference]: Without dead ends: 12779 [2018-11-06 21:28:25,998 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 21:28:26,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12779 states. [2018-11-06 21:28:26,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12779 to 11156. [2018-11-06 21:28:26,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11156 states. [2018-11-06 21:28:26,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 12116 transitions. [2018-11-06 21:28:26,135 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 12116 transitions. Word has length 950 [2018-11-06 21:28:26,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:28:26,136 INFO L480 AbstractCegarLoop]: Abstraction has 11156 states and 12116 transitions. [2018-11-06 21:28:26,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 21:28:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 12116 transitions. [2018-11-06 21:28:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1491 [2018-11-06 21:28:26,172 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:28:26,173 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:28:26,173 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:28:26,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:28:26,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1411178400, now seen corresponding path program 1 times [2018-11-06 21:28:26,174 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:28:26,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:28:26,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:26,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:26,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6978 backedges. 4482 proven. 363 refuted. 0 times theorem prover too weak. 2133 trivial. 0 not checked. [2018-11-06 21:28:30,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 21:28:30,096 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 21:28:30,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:30,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 21:28:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6978 backedges. 2320 proven. 0 refuted. 0 times theorem prover too weak. 4658 trivial. 0 not checked. [2018-11-06 21:28:32,133 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 21:28:32,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2018-11-06 21:28:32,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 21:28:32,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 21:28:32,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-06 21:28:32,136 INFO L87 Difference]: Start difference. First operand 11156 states and 12116 transitions. Second operand 11 states. [2018-11-06 21:28:37,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:28:37,033 INFO L93 Difference]: Finished difference Result 22442 states and 24372 transitions. [2018-11-06 21:28:37,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 21:28:37,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1490 [2018-11-06 21:28:37,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:28:37,050 INFO L225 Difference]: With dead ends: 22442 [2018-11-06 21:28:37,050 INFO L226 Difference]: Without dead ends: 11467 [2018-11-06 21:28:37,058 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1519 GetRequests, 1498 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2018-11-06 21:28:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11467 states. [2018-11-06 21:28:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11467 to 11335. [2018-11-06 21:28:37,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11335 states. [2018-11-06 21:28:37,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11335 states to 11335 states and 12069 transitions. [2018-11-06 21:28:37,193 INFO L78 Accepts]: Start accepts. Automaton has 11335 states and 12069 transitions. Word has length 1490 [2018-11-06 21:28:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:28:37,194 INFO L480 AbstractCegarLoop]: Abstraction has 11335 states and 12069 transitions. [2018-11-06 21:28:37,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 21:28:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 11335 states and 12069 transitions. [2018-11-06 21:28:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1599 [2018-11-06 21:28:37,230 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:28:37,232 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 7, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:28:37,232 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:28:37,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:28:37,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1797355890, now seen corresponding path program 1 times [2018-11-06 21:28:37,233 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:28:37,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:28:37,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:37,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:37,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:38,252 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-11-06 21:28:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8217 backedges. 1460 proven. 0 refuted. 0 times theorem prover too weak. 6757 trivial. 0 not checked. [2018-11-06 21:28:39,138 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 21:28:39,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 21:28:39,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 21:28:39,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 21:28:39,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 21:28:39,139 INFO L87 Difference]: Start difference. First operand 11335 states and 12069 transitions. Second operand 4 states. [2018-11-06 21:28:40,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:28:40,474 INFO L93 Difference]: Finished difference Result 22489 states and 23956 transitions. [2018-11-06 21:28:40,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 21:28:40,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1598 [2018-11-06 21:28:40,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:28:40,488 INFO L225 Difference]: With dead ends: 22489 [2018-11-06 21:28:40,489 INFO L226 Difference]: Without dead ends: 11335 [2018-11-06 21:28:40,497 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 21:28:40,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11335 states. [2018-11-06 21:28:40,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11335 to 11335. [2018-11-06 21:28:40,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11335 states. [2018-11-06 21:28:40,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11335 states to 11335 states and 11847 transitions. [2018-11-06 21:28:40,629 INFO L78 Accepts]: Start accepts. Automaton has 11335 states and 11847 transitions. Word has length 1598 [2018-11-06 21:28:40,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:28:40,630 INFO L480 AbstractCegarLoop]: Abstraction has 11335 states and 11847 transitions. [2018-11-06 21:28:40,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 21:28:40,630 INFO L276 IsEmpty]: Start isEmpty. Operand 11335 states and 11847 transitions. [2018-11-06 21:28:40,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1666 [2018-11-06 21:28:40,659 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:28:40,660 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:28:40,660 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:28:40,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:28:40,661 INFO L82 PathProgramCache]: Analyzing trace with hash -80413954, now seen corresponding path program 1 times [2018-11-06 21:28:40,661 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:28:40,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:28:40,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:40,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:40,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8455 backedges. 2786 proven. 0 refuted. 0 times theorem prover too weak. 5669 trivial. 0 not checked. [2018-11-06 21:28:42,489 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 21:28:42,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 21:28:42,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 21:28:42,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 21:28:42,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 21:28:42,491 INFO L87 Difference]: Start difference. First operand 11335 states and 11847 transitions. Second operand 4 states. [2018-11-06 21:28:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:28:43,545 INFO L93 Difference]: Finished difference Result 21765 states and 22753 transitions. [2018-11-06 21:28:43,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 21:28:43,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1665 [2018-11-06 21:28:43,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:28:43,549 INFO L225 Difference]: With dead ends: 21765 [2018-11-06 21:28:43,549 INFO L226 Difference]: Without dead ends: 5025 [2018-11-06 21:28:43,556 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 21:28:43,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5025 states. [2018-11-06 21:28:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5025 to 5025. [2018-11-06 21:28:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5025 states. [2018-11-06 21:28:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 5144 transitions. [2018-11-06 21:28:43,598 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 5144 transitions. Word has length 1665 [2018-11-06 21:28:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:28:43,599 INFO L480 AbstractCegarLoop]: Abstraction has 5025 states and 5144 transitions. [2018-11-06 21:28:43,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 21:28:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 5144 transitions. [2018-11-06 21:28:43,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1684 [2018-11-06 21:28:43,617 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:28:43,618 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:28:43,618 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:28:43,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:28:43,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1592832604, now seen corresponding path program 1 times [2018-11-06 21:28:43,619 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:28:43,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:28:43,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:43,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:43,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:44,921 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-11-06 21:28:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8561 backedges. 2628 proven. 0 refuted. 0 times theorem prover too weak. 5933 trivial. 0 not checked. [2018-11-06 21:28:46,612 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 21:28:46,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-06 21:28:46,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 21:28:46,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 21:28:46,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-06 21:28:46,613 INFO L87 Difference]: Start difference. First operand 5025 states and 5144 transitions. Second operand 7 states. [2018-11-06 21:28:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:28:47,991 INFO L93 Difference]: Finished difference Result 9771 states and 10009 transitions. [2018-11-06 21:28:47,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 21:28:47,992 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1683 [2018-11-06 21:28:47,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:28:47,996 INFO L225 Difference]: With dead ends: 9771 [2018-11-06 21:28:47,996 INFO L226 Difference]: Without dead ends: 4485 [2018-11-06 21:28:47,999 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-06 21:28:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4485 states. [2018-11-06 21:28:48,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4485 to 4485. [2018-11-06 21:28:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4485 states. [2018-11-06 21:28:48,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 4578 transitions. [2018-11-06 21:28:48,051 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 4578 transitions. Word has length 1683 [2018-11-06 21:28:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:28:48,052 INFO L480 AbstractCegarLoop]: Abstraction has 4485 states and 4578 transitions. [2018-11-06 21:28:48,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 21:28:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 4578 transitions. [2018-11-06 21:28:48,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1720 [2018-11-06 21:28:48,077 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:28:48,078 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 8, 8, 8, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:28:48,078 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:28:48,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:28:48,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1400328748, now seen corresponding path program 1 times [2018-11-06 21:28:48,079 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:28:48,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:28:48,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:48,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:48,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:49,060 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-06 21:28:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9594 backedges. 2780 proven. 0 refuted. 0 times theorem prover too weak. 6814 trivial. 0 not checked. [2018-11-06 21:28:50,677 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 21:28:50,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 21:28:50,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 21:28:50,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 21:28:50,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 21:28:50,679 INFO L87 Difference]: Start difference. First operand 4485 states and 4578 transitions. Second operand 4 states. [2018-11-06 21:28:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:28:51,561 INFO L93 Difference]: Finished difference Result 8789 states and 8981 transitions. [2018-11-06 21:28:51,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 21:28:51,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1719 [2018-11-06 21:28:51,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:28:51,566 INFO L225 Difference]: With dead ends: 8789 [2018-11-06 21:28:51,566 INFO L226 Difference]: Without dead ends: 4484 [2018-11-06 21:28:51,569 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 21:28:51,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2018-11-06 21:28:51,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4484. [2018-11-06 21:28:51,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4484 states. [2018-11-06 21:28:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4484 states to 4484 states and 4570 transitions. [2018-11-06 21:28:51,611 INFO L78 Accepts]: Start accepts. Automaton has 4484 states and 4570 transitions. Word has length 1719 [2018-11-06 21:28:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:28:51,612 INFO L480 AbstractCegarLoop]: Abstraction has 4484 states and 4570 transitions. [2018-11-06 21:28:51,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 21:28:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4484 states and 4570 transitions. [2018-11-06 21:28:51,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1738 [2018-11-06 21:28:51,637 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:28:51,638 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:28:51,638 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:28:51,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:28:51,639 INFO L82 PathProgramCache]: Analyzing trace with hash -112448186, now seen corresponding path program 1 times [2018-11-06 21:28:51,639 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:28:51,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:28:51,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:51,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:51,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:28:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9734 backedges. 4753 proven. 360 refuted. 0 times theorem prover too weak. 4621 trivial. 0 not checked. [2018-11-06 21:28:53,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 21:28:53,809 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 21:28:53,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:28:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:28:54,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 21:28:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9734 backedges. 2735 proven. 157 refuted. 0 times theorem prover too weak. 6842 trivial. 0 not checked. [2018-11-06 21:28:56,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 21:28:56,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2018-11-06 21:28:56,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 21:28:56,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 21:28:56,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-06 21:28:56,692 INFO L87 Difference]: Start difference. First operand 4484 states and 4570 transitions. Second operand 10 states. [2018-11-06 21:29:02,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:29:02,106 INFO L93 Difference]: Finished difference Result 10933 states and 11181 transitions. [2018-11-06 21:29:02,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 21:29:02,107 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1737 [2018-11-06 21:29:02,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:29:02,112 INFO L225 Difference]: With dead ends: 10933 [2018-11-06 21:29:02,112 INFO L226 Difference]: Without dead ends: 5914 [2018-11-06 21:29:02,115 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1758 GetRequests, 1741 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2018-11-06 21:29:02,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5914 states. [2018-11-06 21:29:02,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5914 to 4661. [2018-11-06 21:29:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4661 states. [2018-11-06 21:29:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 4727 transitions. [2018-11-06 21:29:02,175 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 4727 transitions. Word has length 1737 [2018-11-06 21:29:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:29:02,177 INFO L480 AbstractCegarLoop]: Abstraction has 4661 states and 4727 transitions. [2018-11-06 21:29:02,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 21:29:02,177 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 4727 transitions. [2018-11-06 21:29:02,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1909 [2018-11-06 21:29:02,205 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:29:02,206 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:29:02,207 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:29:02,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:29:02,207 INFO L82 PathProgramCache]: Analyzing trace with hash 401359015, now seen corresponding path program 1 times [2018-11-06 21:29:02,207 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:29:02,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:29:02,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:29:02,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:29:02,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:29:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:29:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11464 backedges. 3091 proven. 0 refuted. 0 times theorem prover too weak. 8373 trivial. 0 not checked. [2018-11-06 21:29:05,399 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 21:29:05,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-06 21:29:05,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 21:29:05,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 21:29:05,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-06 21:29:05,401 INFO L87 Difference]: Start difference. First operand 4661 states and 4727 transitions. Second operand 7 states. [2018-11-06 21:29:07,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:29:07,077 INFO L93 Difference]: Finished difference Result 8275 states and 8398 transitions. [2018-11-06 21:29:07,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 21:29:07,077 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1908 [2018-11-06 21:29:07,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:29:07,081 INFO L225 Difference]: With dead ends: 8275 [2018-11-06 21:29:07,082 INFO L226 Difference]: Without dead ends: 4300 [2018-11-06 21:29:07,084 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-06 21:29:07,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2018-11-06 21:29:07,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 4300. [2018-11-06 21:29:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4300 states. [2018-11-06 21:29:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4300 states to 4300 states and 4350 transitions. [2018-11-06 21:29:07,126 INFO L78 Accepts]: Start accepts. Automaton has 4300 states and 4350 transitions. Word has length 1908 [2018-11-06 21:29:07,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:29:07,128 INFO L480 AbstractCegarLoop]: Abstraction has 4300 states and 4350 transitions. [2018-11-06 21:29:07,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 21:29:07,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4300 states and 4350 transitions. [2018-11-06 21:29:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2042 [2018-11-06 21:29:07,160 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 21:29:07,161 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 11, 11, 11, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 21:29:07,161 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 21:29:07,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 21:29:07,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1240948803, now seen corresponding path program 1 times [2018-11-06 21:29:07,162 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 21:29:07,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 21:29:07,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:29:07,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:29:07,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 21:29:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:29:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13169 backedges. 3283 proven. 120 refuted. 0 times theorem prover too weak. 9766 trivial. 0 not checked. [2018-11-06 21:29:09,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 21:29:09,490 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 21:29:09,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 21:29:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 21:29:09,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 21:29:10,180 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2018-11-06 21:29:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13169 backedges. 3329 proven. 74 refuted. 0 times theorem prover too weak. 9766 trivial. 0 not checked. [2018-11-06 21:29:12,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 21:29:12,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-11-06 21:29:12,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 21:29:12,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 21:29:12,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-06 21:29:12,235 INFO L87 Difference]: Start difference. First operand 4300 states and 4350 transitions. Second operand 7 states. [2018-11-06 21:29:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 21:29:14,678 INFO L93 Difference]: Finished difference Result 7880 states and 7979 transitions. [2018-11-06 21:29:14,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 21:29:14,678 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 2041 [2018-11-06 21:29:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 21:29:14,680 INFO L225 Difference]: With dead ends: 7880 [2018-11-06 21:29:14,680 INFO L226 Difference]: Without dead ends: 0 [2018-11-06 21:29:14,683 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2049 GetRequests, 2041 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-06 21:29:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-06 21:29:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-06 21:29:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-06 21:29:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-06 21:29:14,683 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 2041 [2018-11-06 21:29:14,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 21:29:14,684 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-06 21:29:14,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 21:29:14,684 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-06 21:29:14,684 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-06 21:29:14,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-06 21:29:14,783 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:14,795 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:14,807 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:14,809 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:14,923 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:14,948 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:14,983 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,007 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,026 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,082 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,096 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,103 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,126 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,132 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,170 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,186 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,219 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,242 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,247 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,260 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,272 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,282 WARN L179 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 345 [2018-11-06 21:29:15,323 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,330 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,341 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,343 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,436 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,454 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,481 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,499 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,510 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,548 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,560 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,566 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,584 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,589 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,615 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,627 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,650 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,667 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,671 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,683 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,693 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-06 21:29:15,701 WARN L179 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 345 [2018-11-06 21:31:11,946 WARN L179 SmtUtils]: Spent 1.94 m on a formula simplification. DAG size of input: 291 DAG size of output: 116 Received shutdown request... [2018-11-06 21:31:40,810 WARN L187 SmtUtils]: Removed 22 from assertion stack [2018-11-06 21:31:40,810 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-11-06 21:31:40,812 INFO L168 Benchmark]: Toolchain (without parser) took 248420.85 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.8 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-11-06 21:31:40,813 INFO L168 Benchmark]: CDTParser took 0.29 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. [2018-11-06 21:31:40,814 INFO L168 Benchmark]: CACSL2BoogieTranslator took 813.48 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-06 21:31:40,814 INFO L168 Benchmark]: Boogie Procedure Inliner took 208.27 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 714.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -796.8 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2018-11-06 21:31:40,815 INFO L168 Benchmark]: Boogie Preprocessor took 115.76 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2018-11-06 21:31:40,817 INFO L168 Benchmark]: RCFGBuilder took 3730.29 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 121.4 MB). Peak memory consumption was 121.4 MB. Max. memory is 7.1 GB. [2018-11-06 21:31:40,818 INFO L168 Benchmark]: TraceAbstraction took 243547.58 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 3.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-11-06 21:31:40,824 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 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. * CACSL2BoogieTranslator took 813.48 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 208.27 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 714.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -796.8 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.76 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3730.29 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 121.4 MB). Peak memory consumption was 121.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243547.58 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 3.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 118]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 291. RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown