java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/fragtest_simple_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:56:03,693 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:56:03,695 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:56:03,707 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:56:03,707 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:56:03,708 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:56:03,709 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:56:03,711 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:56:03,713 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:56:03,714 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:56:03,715 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:56:03,715 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:56:03,716 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:56:03,717 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:56:03,718 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:56:03,719 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:56:03,720 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:56:03,722 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:56:03,724 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:56:03,726 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:56:03,727 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:56:03,728 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:56:03,734 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 11:56:03,751 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 11:56:03,779 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:56:03,779 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:56:03,780 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:56:03,780 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:56:03,782 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:56:03,782 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:56:03,782 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:56:03,782 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:56:03,784 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:56:03,784 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:56:03,784 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:56:03,784 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:56:03,784 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:56:03,785 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:56:03,785 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:56:03,785 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:56:03,785 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:56:03,785 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:56:03,786 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:56:03,787 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:56:03,787 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:56:03,787 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:56:03,787 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:56:03,788 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:56:03,788 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:56:03,788 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:56:03,788 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:56:03,789 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:56:03,839 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:56:03,854 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:56:03,858 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:56:03,860 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:56:03,860 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:56:03,862 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/fragtest_simple_true-unreach-call_true-termination.i [2018-10-24 11:56:03,921 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d3bc6d2f0/ace0e3c3832845df82129f0dc75638a1/FLAG661259cf2 [2018-10-24 11:56:04,338 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:56:04,339 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/fragtest_simple_true-unreach-call_true-termination.i [2018-10-24 11:56:04,344 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d3bc6d2f0/ace0e3c3832845df82129f0dc75638a1/FLAG661259cf2 [2018-10-24 11:56:04,358 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d3bc6d2f0/ace0e3c3832845df82129f0dc75638a1 [2018-10-24 11:56:04,368 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:56:04,369 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:56:04,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:56:04,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:56:04,374 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:56:04,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:56:04" (1/1) ... [2018-10-24 11:56:04,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e66d9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:04, skipping insertion in model container [2018-10-24 11:56:04,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:56:04" (1/1) ... [2018-10-24 11:56:04,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:56:04,410 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:56:04,583 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:56:04,587 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:56:04,607 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:56:04,622 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:56:04,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:04 WrapperNode [2018-10-24 11:56:04,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:56:04,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:56:04,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:56:04,624 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:56:04,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:04" (1/1) ... [2018-10-24 11:56:04,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:04" (1/1) ... [2018-10-24 11:56:04,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:56:04,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:56:04,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:56:04,661 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:56:04,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:04" (1/1) ... [2018-10-24 11:56:04,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:04" (1/1) ... [2018-10-24 11:56:04,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:04" (1/1) ... [2018-10-24 11:56:04,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:04" (1/1) ... [2018-10-24 11:56:04,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:04" (1/1) ... [2018-10-24 11:56:04,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:04" (1/1) ... [2018-10-24 11:56:04,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:04" (1/1) ... [2018-10-24 11:56:04,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:56:04,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:56:04,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:56:04,683 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:56:04,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:56:04,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:56:04,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:56:05,148 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:56:05,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:56:05 BoogieIcfgContainer [2018-10-24 11:56:05,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:56:05,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:56:05,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:56:05,155 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:56:05,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:56:04" (1/3) ... [2018-10-24 11:56:05,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635d5a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:56:05, skipping insertion in model container [2018-10-24 11:56:05,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:04" (2/3) ... [2018-10-24 11:56:05,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635d5a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:56:05, skipping insertion in model container [2018-10-24 11:56:05,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:56:05" (3/3) ... [2018-10-24 11:56:05,158 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple_true-unreach-call_true-termination.i [2018-10-24 11:56:05,168 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:56:05,176 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:56:05,192 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:56:05,224 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:56:05,225 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:56:05,225 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:56:05,225 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:56:05,226 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:56:05,226 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:56:05,226 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:56:05,226 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:56:05,226 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:56:05,242 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-10-24 11:56:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 11:56:05,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:05,249 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:05,251 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:05,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:05,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1447458234, now seen corresponding path program 1 times [2018-10-24 11:56:05,259 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:05,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:05,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:05,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:05,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:05,364 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:56:05,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:56:05,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:56:05,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:56:05,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:56:05,383 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-10-24 11:56:05,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:05,400 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2018-10-24 11:56:05,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:56:05,401 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-24 11:56:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:05,411 INFO L225 Difference]: With dead ends: 39 [2018-10-24 11:56:05,411 INFO L226 Difference]: Without dead ends: 18 [2018-10-24 11:56:05,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:56:05,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-24 11:56:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-24 11:56:05,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-24 11:56:05,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2018-10-24 11:56:05,452 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2018-10-24 11:56:05,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:05,453 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2018-10-24 11:56:05,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:56:05,453 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2018-10-24 11:56:05,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 11:56:05,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:05,454 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:05,455 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:05,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:05,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2129962202, now seen corresponding path program 1 times [2018-10-24 11:56:05,455 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:05,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:05,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:05,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:05,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:05,677 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:56:05,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 11:56:05,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 11:56:05,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 11:56:05,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:56:05,680 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2018-10-24 11:56:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:05,874 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-10-24 11:56:05,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:56:05,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-10-24 11:56:05,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:05,876 INFO L225 Difference]: With dead ends: 27 [2018-10-24 11:56:05,876 INFO L226 Difference]: Without dead ends: 25 [2018-10-24 11:56:05,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:56:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-24 11:56:05,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2018-10-24 11:56:05,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-24 11:56:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2018-10-24 11:56:05,883 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2018-10-24 11:56:05,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:05,883 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2018-10-24 11:56:05,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 11:56:05,884 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2018-10-24 11:56:05,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 11:56:05,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:05,885 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:05,885 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:05,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:05,886 INFO L82 PathProgramCache]: Analyzing trace with hash 514343373, now seen corresponding path program 1 times [2018-10-24 11:56:05,886 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:05,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:05,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:05,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:05,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:06,030 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:56:06,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 11:56:06,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:56:06,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:56:06,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:56:06,032 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2018-10-24 11:56:06,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:06,251 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2018-10-24 11:56:06,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:56:06,251 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-24 11:56:06,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:06,252 INFO L225 Difference]: With dead ends: 42 [2018-10-24 11:56:06,253 INFO L226 Difference]: Without dead ends: 29 [2018-10-24 11:56:06,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:56:06,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-24 11:56:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-10-24 11:56:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-24 11:56:06,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2018-10-24 11:56:06,258 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2018-10-24 11:56:06,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:06,258 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-10-24 11:56:06,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:56:06,259 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2018-10-24 11:56:06,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-24 11:56:06,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:06,260 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:06,260 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:06,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:06,260 INFO L82 PathProgramCache]: Analyzing trace with hash -464363487, now seen corresponding path program 1 times [2018-10-24 11:56:06,260 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:06,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:06,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:06,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:06,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:06,530 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-24 11:56:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:06,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:06,559 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:06,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:06,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:06,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:06,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-10-24 11:56:06,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:56:06,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:56:06,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:56:06,743 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 10 states. [2018-10-24 11:56:07,153 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-24 11:56:07,332 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-24 11:56:07,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:07,613 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2018-10-24 11:56:07,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 11:56:07,616 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-10-24 11:56:07,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:07,617 INFO L225 Difference]: With dead ends: 56 [2018-10-24 11:56:07,618 INFO L226 Difference]: Without dead ends: 43 [2018-10-24 11:56:07,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:56:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-24 11:56:07,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-10-24 11:56:07,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-24 11:56:07,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2018-10-24 11:56:07,630 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2018-10-24 11:56:07,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:07,632 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2018-10-24 11:56:07,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:56:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2018-10-24 11:56:07,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-24 11:56:07,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:07,634 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:07,634 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:07,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:07,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1173357882, now seen corresponding path program 2 times [2018-10-24 11:56:07,635 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:07,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:07,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:07,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:07,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:07,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:07,800 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:07,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:56:07,850 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:56:07,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:07,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:08,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:08,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2018-10-24 11:56:08,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:56:08,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:56:08,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:56:08,114 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 13 states. [2018-10-24 11:56:08,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:08,648 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2018-10-24 11:56:08,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 11:56:08,649 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2018-10-24 11:56:08,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:08,652 INFO L225 Difference]: With dead ends: 74 [2018-10-24 11:56:08,652 INFO L226 Difference]: Without dead ends: 56 [2018-10-24 11:56:08,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:56:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-24 11:56:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-10-24 11:56:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-24 11:56:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-10-24 11:56:08,662 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 31 [2018-10-24 11:56:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:08,662 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2018-10-24 11:56:08,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:56:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2018-10-24 11:56:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-24 11:56:08,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:08,664 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:08,664 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:08,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:08,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2096819263, now seen corresponding path program 3 times [2018-10-24 11:56:08,665 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:08,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:08,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:08,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:08,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:08,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:08,860 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:08,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:56:08,945 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-24 11:56:08,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:08,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:09,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:09,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2018-10-24 11:56:09,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 11:56:09,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 11:56:09,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:56:09,166 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 14 states. [2018-10-24 11:56:09,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:09,650 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2018-10-24 11:56:09,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 11:56:09,651 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2018-10-24 11:56:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:09,652 INFO L225 Difference]: With dead ends: 86 [2018-10-24 11:56:09,653 INFO L226 Difference]: Without dead ends: 63 [2018-10-24 11:56:09,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:56:09,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-24 11:56:09,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2018-10-24 11:56:09,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-24 11:56:09,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-10-24 11:56:09,660 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 39 [2018-10-24 11:56:09,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:09,661 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-10-24 11:56:09,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 11:56:09,661 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-10-24 11:56:09,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-24 11:56:09,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:09,663 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:09,663 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:09,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:09,663 INFO L82 PathProgramCache]: Analyzing trace with hash -246117139, now seen corresponding path program 4 times [2018-10-24 11:56:09,663 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:09,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:09,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:09,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:09,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:09,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:09,808 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:09,823 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:56:09,846 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:56:09,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:09,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:09,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:09,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2018-10-24 11:56:09,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:56:09,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:56:09,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:56:09,962 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 11 states. [2018-10-24 11:56:10,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:10,114 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2018-10-24 11:56:10,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 11:56:10,121 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2018-10-24 11:56:10,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:10,122 INFO L225 Difference]: With dead ends: 64 [2018-10-24 11:56:10,122 INFO L226 Difference]: Without dead ends: 62 [2018-10-24 11:56:10,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:56:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-24 11:56:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2018-10-24 11:56:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-24 11:56:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2018-10-24 11:56:10,131 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 42 [2018-10-24 11:56:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:10,131 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2018-10-24 11:56:10,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:56:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2018-10-24 11:56:10,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-24 11:56:10,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:10,133 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:10,133 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:10,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:10,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1072238323, now seen corresponding path program 5 times [2018-10-24 11:56:10,134 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:10,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:10,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:10,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:10,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:10,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:10,349 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:10,359 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:56:10,413 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-24 11:56:10,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:10,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:10,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:10,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-24 11:56:10,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 11:56:10,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 11:56:10,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:56:10,590 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 19 states. [2018-10-24 11:56:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:10,995 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2018-10-24 11:56:10,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 11:56:10,995 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2018-10-24 11:56:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:10,997 INFO L225 Difference]: With dead ends: 112 [2018-10-24 11:56:10,997 INFO L226 Difference]: Without dead ends: 81 [2018-10-24 11:56:10,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:56:10,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-24 11:56:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 56. [2018-10-24 11:56:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-24 11:56:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2018-10-24 11:56:11,007 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 52 [2018-10-24 11:56:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:11,007 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2018-10-24 11:56:11,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 11:56:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2018-10-24 11:56:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-24 11:56:11,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:11,009 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:11,009 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:11,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash -258818207, now seen corresponding path program 6 times [2018-10-24 11:56:11,010 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:11,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:11,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:11,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:11,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 65 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:11,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:11,225 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:11,232 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:56:11,324 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-24 11:56:11,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:11,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 65 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:11,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:11,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2018-10-24 11:56:11,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 11:56:11,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 11:56:11,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:56:11,637 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 20 states. [2018-10-24 11:56:12,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:12,033 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2018-10-24 11:56:12,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 11:56:12,033 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2018-10-24 11:56:12,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:12,035 INFO L225 Difference]: With dead ends: 122 [2018-10-24 11:56:12,035 INFO L226 Difference]: Without dead ends: 89 [2018-10-24 11:56:12,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:56:12,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-24 11:56:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2018-10-24 11:56:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-24 11:56:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2018-10-24 11:56:12,044 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 55 [2018-10-24 11:56:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:12,045 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2018-10-24 11:56:12,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 11:56:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2018-10-24 11:56:12,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-24 11:56:12,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:12,046 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:12,046 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:12,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:12,047 INFO L82 PathProgramCache]: Analyzing trace with hash 134373517, now seen corresponding path program 7 times [2018-10-24 11:56:12,047 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:12,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:12,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:12,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:12,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 63 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:12,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:12,222 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:12,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:12,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 63 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:12,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:12,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-24 11:56:12,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 11:56:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 11:56:12,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:56:12,461 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 12 states. [2018-10-24 11:56:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:12,722 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-10-24 11:56:12,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 11:56:12,723 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2018-10-24 11:56:12,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:12,724 INFO L225 Difference]: With dead ends: 75 [2018-10-24 11:56:12,724 INFO L226 Difference]: Without dead ends: 73 [2018-10-24 11:56:12,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:56:12,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-24 11:56:12,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-10-24 11:56:12,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-24 11:56:12,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2018-10-24 11:56:12,735 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 58 [2018-10-24 11:56:12,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:12,736 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2018-10-24 11:56:12,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 11:56:12,736 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2018-10-24 11:56:12,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-24 11:56:12,737 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:12,737 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:12,737 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:12,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:12,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1329021779, now seen corresponding path program 8 times [2018-10-24 11:56:12,738 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:12,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:12,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:12,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:12,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 126 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:13,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:13,004 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:13,013 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:56:13,043 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:56:13,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:13,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 123 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:56:13,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:13,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 24 [2018-10-24 11:56:13,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 11:56:13,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 11:56:13,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:56:13,319 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 24 states. [2018-10-24 11:56:13,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:13,721 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2018-10-24 11:56:13,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 11:56:13,722 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2018-10-24 11:56:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:13,723 INFO L225 Difference]: With dead ends: 148 [2018-10-24 11:56:13,723 INFO L226 Difference]: Without dead ends: 107 [2018-10-24 11:56:13,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=668, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:56:13,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-24 11:56:13,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 72. [2018-10-24 11:56:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-24 11:56:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2018-10-24 11:56:13,734 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 68 [2018-10-24 11:56:13,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:13,734 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2018-10-24 11:56:13,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 11:56:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2018-10-24 11:56:13,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-24 11:56:13,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:13,736 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:13,736 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:13,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:13,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1281006847, now seen corresponding path program 9 times [2018-10-24 11:56:13,737 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:13,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:13,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:13,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:13,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 126 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:14,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:14,009 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:14,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:56:14,054 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-24 11:56:14,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:14,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 126 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:14,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:14,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2018-10-24 11:56:14,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-24 11:56:14,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-24 11:56:14,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:56:14,277 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 26 states. [2018-10-24 11:56:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:14,800 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2018-10-24 11:56:14,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 11:56:14,800 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2018-10-24 11:56:14,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:14,802 INFO L225 Difference]: With dead ends: 158 [2018-10-24 11:56:14,802 INFO L226 Difference]: Without dead ends: 115 [2018-10-24 11:56:14,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:56:14,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-24 11:56:14,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 75. [2018-10-24 11:56:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-24 11:56:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2018-10-24 11:56:14,811 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 71 [2018-10-24 11:56:14,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:14,811 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2018-10-24 11:56:14,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-24 11:56:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2018-10-24 11:56:14,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-24 11:56:14,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:14,813 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:14,813 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:14,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:14,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1092277203, now seen corresponding path program 10 times [2018-10-24 11:56:14,813 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:14,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:14,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:14,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:14,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 108 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:15,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:15,036 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:15,043 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:56:15,071 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:56:15,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:15,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 108 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:15,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:15,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2018-10-24 11:56:15,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 11:56:15,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 11:56:15,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:56:15,144 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 15 states. [2018-10-24 11:56:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:15,371 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2018-10-24 11:56:15,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 11:56:15,371 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2018-10-24 11:56:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:15,372 INFO L225 Difference]: With dead ends: 96 [2018-10-24 11:56:15,372 INFO L226 Difference]: Without dead ends: 94 [2018-10-24 11:56:15,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:56:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-24 11:56:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2018-10-24 11:56:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-24 11:56:15,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2018-10-24 11:56:15,381 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 74 [2018-10-24 11:56:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:15,382 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2018-10-24 11:56:15,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 11:56:15,382 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2018-10-24 11:56:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-24 11:56:15,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:15,383 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:15,383 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:15,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:15,384 INFO L82 PathProgramCache]: Analyzing trace with hash 500793421, now seen corresponding path program 11 times [2018-10-24 11:56:15,384 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:15,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:15,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:15,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:15,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 207 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:16,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:16,096 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:16,110 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:56:16,197 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-24 11:56:16,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:16,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 207 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:16,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:16,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2018-10-24 11:56:16,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-24 11:56:16,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-24 11:56:16,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:56:16,660 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 31 states. [2018-10-24 11:56:17,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:17,031 INFO L93 Difference]: Finished difference Result 184 states and 206 transitions. [2018-10-24 11:56:17,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 11:56:17,033 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 84 [2018-10-24 11:56:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:17,034 INFO L225 Difference]: With dead ends: 184 [2018-10-24 11:56:17,034 INFO L226 Difference]: Without dead ends: 133 [2018-10-24 11:56:17,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=429, Invalid=1131, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:56:17,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-24 11:56:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 88. [2018-10-24 11:56:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-24 11:56:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2018-10-24 11:56:17,043 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 84 [2018-10-24 11:56:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:17,044 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2018-10-24 11:56:17,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-24 11:56:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2018-10-24 11:56:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-24 11:56:17,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:17,045 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:17,045 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:17,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2040070495, now seen corresponding path program 12 times [2018-10-24 11:56:17,046 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:17,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:17,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:17,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:17,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 207 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:17,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:17,341 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:17,349 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:56:17,409 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-24 11:56:17,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:17,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 207 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:17,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:17,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 32 [2018-10-24 11:56:17,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-24 11:56:17,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-24 11:56:17,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:56:17,806 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 32 states. [2018-10-24 11:56:18,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:18,312 INFO L93 Difference]: Finished difference Result 194 states and 218 transitions. [2018-10-24 11:56:18,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-24 11:56:18,312 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2018-10-24 11:56:18,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:18,314 INFO L225 Difference]: With dead ends: 194 [2018-10-24 11:56:18,314 INFO L226 Difference]: Without dead ends: 141 [2018-10-24 11:56:18,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=481, Invalid=1241, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:56:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-24 11:56:18,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 91. [2018-10-24 11:56:18,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-24 11:56:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2018-10-24 11:56:18,323 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 87 [2018-10-24 11:56:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:18,324 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2018-10-24 11:56:18,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-24 11:56:18,324 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2018-10-24 11:56:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-24 11:56:18,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:18,325 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:18,325 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:18,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:18,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1881599949, now seen corresponding path program 13 times [2018-10-24 11:56:18,325 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:18,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:18,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:18,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:18,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 165 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:18,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:18,529 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:18,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:18,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 165 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:18,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:18,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-24 11:56:18,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 11:56:18,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 11:56:18,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:56:18,682 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 16 states. [2018-10-24 11:56:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:18,977 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2018-10-24 11:56:18,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 11:56:18,980 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2018-10-24 11:56:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:18,981 INFO L225 Difference]: With dead ends: 107 [2018-10-24 11:56:18,981 INFO L226 Difference]: Without dead ends: 105 [2018-10-24 11:56:18,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:56:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-24 11:56:18,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2018-10-24 11:56:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-24 11:56:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2018-10-24 11:56:18,998 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 90 [2018-10-24 11:56:18,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:18,998 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2018-10-24 11:56:18,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 11:56:18,998 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2018-10-24 11:56:18,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-24 11:56:18,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:19,000 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:19,000 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:19,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:19,000 INFO L82 PathProgramCache]: Analyzing trace with hash 888355821, now seen corresponding path program 14 times [2018-10-24 11:56:19,001 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:19,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:19,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:19,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:19,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 308 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:19,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:19,502 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:19,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:56:19,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:56:19,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:19,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 305 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:56:19,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:19,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 36 [2018-10-24 11:56:19,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-24 11:56:19,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-24 11:56:19,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:56:19,883 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 36 states. [2018-10-24 11:56:20,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:20,588 INFO L93 Difference]: Finished difference Result 220 states and 246 transitions. [2018-10-24 11:56:20,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 11:56:20,589 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 100 [2018-10-24 11:56:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:20,590 INFO L225 Difference]: With dead ends: 220 [2018-10-24 11:56:20,590 INFO L226 Difference]: Without dead ends: 159 [2018-10-24 11:56:20,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=586, Invalid=1576, Unknown=0, NotChecked=0, Total=2162 [2018-10-24 11:56:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-24 11:56:20,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2018-10-24 11:56:20,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-24 11:56:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2018-10-24 11:56:20,599 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 100 [2018-10-24 11:56:20,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:20,599 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2018-10-24 11:56:20,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-24 11:56:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2018-10-24 11:56:20,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-24 11:56:20,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:20,601 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:20,601 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:20,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:20,601 INFO L82 PathProgramCache]: Analyzing trace with hash -159280575, now seen corresponding path program 15 times [2018-10-24 11:56:20,602 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:20,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:20,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:20,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:20,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 308 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:21,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:21,367 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:21,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:56:21,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-24 11:56:21,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:21,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 308 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:21,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:21,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 38 [2018-10-24 11:56:21,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-24 11:56:21,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-24 11:56:21,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:56:21,916 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand 38 states. [2018-10-24 11:56:22,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:22,344 INFO L93 Difference]: Finished difference Result 230 states and 258 transitions. [2018-10-24 11:56:22,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 11:56:22,345 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 103 [2018-10-24 11:56:22,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:22,347 INFO L225 Difference]: With dead ends: 230 [2018-10-24 11:56:22,347 INFO L226 Difference]: Without dead ends: 167 [2018-10-24 11:56:22,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 11:56:22,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-24 11:56:22,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 107. [2018-10-24 11:56:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-24 11:56:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2018-10-24 11:56:22,357 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 103 [2018-10-24 11:56:22,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:22,357 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2018-10-24 11:56:22,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-24 11:56:22,357 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2018-10-24 11:56:22,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-24 11:56:22,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:22,359 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:22,359 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:22,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:22,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1232186221, now seen corresponding path program 16 times [2018-10-24 11:56:22,359 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:22,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:22,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:22,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:22,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 234 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:22,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:22,831 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:22,838 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:56:22,881 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:56:22,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:22,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 234 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:22,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:22,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2018-10-24 11:56:22,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 11:56:22,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 11:56:22,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:56:22,962 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 19 states. [2018-10-24 11:56:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:23,245 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-10-24 11:56:23,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-24 11:56:23,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 106 [2018-10-24 11:56:23,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:23,247 INFO L225 Difference]: With dead ends: 128 [2018-10-24 11:56:23,248 INFO L226 Difference]: Without dead ends: 126 [2018-10-24 11:56:23,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=350, Invalid=642, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:56:23,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-24 11:56:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2018-10-24 11:56:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-24 11:56:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2018-10-24 11:56:23,259 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 106 [2018-10-24 11:56:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:23,259 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2018-10-24 11:56:23,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 11:56:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2018-10-24 11:56:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-24 11:56:23,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:23,261 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:23,261 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:23,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:23,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1757417587, now seen corresponding path program 17 times [2018-10-24 11:56:23,262 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:23,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:23,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:23,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:23,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 429 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:23,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:23,778 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:23,785 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:56:23,839 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-24 11:56:23,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:23,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 429 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:24,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:24,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2018-10-24 11:56:24,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-24 11:56:24,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-24 11:56:24,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1358, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:56:24,404 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 43 states. [2018-10-24 11:56:25,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:25,040 INFO L93 Difference]: Finished difference Result 256 states and 286 transitions. [2018-10-24 11:56:25,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-24 11:56:25,041 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 116 [2018-10-24 11:56:25,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:25,042 INFO L225 Difference]: With dead ends: 256 [2018-10-24 11:56:25,042 INFO L226 Difference]: Without dead ends: 185 [2018-10-24 11:56:25,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=825, Invalid=2255, Unknown=0, NotChecked=0, Total=3080 [2018-10-24 11:56:25,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-24 11:56:25,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 120. [2018-10-24 11:56:25,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-24 11:56:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2018-10-24 11:56:25,056 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 116 [2018-10-24 11:56:25,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:25,056 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2018-10-24 11:56:25,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-24 11:56:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2018-10-24 11:56:25,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-24 11:56:25,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:25,057 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:25,058 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:25,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:25,058 INFO L82 PathProgramCache]: Analyzing trace with hash 85925345, now seen corresponding path program 18 times [2018-10-24 11:56:25,058 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:25,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:25,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:25,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:25,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 429 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:25,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:25,648 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:25,655 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:56:25,711 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-24 11:56:25,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:25,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 429 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:26,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:26,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 44 [2018-10-24 11:56:26,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-24 11:56:26,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-24 11:56:26,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:56:26,535 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand 44 states. [2018-10-24 11:56:27,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:27,046 INFO L93 Difference]: Finished difference Result 266 states and 298 transitions. [2018-10-24 11:56:27,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-24 11:56:27,047 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 119 [2018-10-24 11:56:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:27,048 INFO L225 Difference]: With dead ends: 266 [2018-10-24 11:56:27,048 INFO L226 Difference]: Without dead ends: 193 [2018-10-24 11:56:27,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2018-10-24 11:56:27,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-24 11:56:27,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 123. [2018-10-24 11:56:27,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-24 11:56:27,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2018-10-24 11:56:27,059 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 119 [2018-10-24 11:56:27,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:27,059 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2018-10-24 11:56:27,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-24 11:56:27,060 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2018-10-24 11:56:27,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-24 11:56:27,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:27,060 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:27,061 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:27,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash -336634099, now seen corresponding path program 19 times [2018-10-24 11:56:27,061 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:27,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:27,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:27,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:27,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 315 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:27,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:27,436 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:27,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:27,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 315 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:27,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:27,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-24 11:56:27,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 11:56:27,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 11:56:27,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:56:27,545 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand 20 states. [2018-10-24 11:56:27,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:27,824 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-10-24 11:56:27,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-24 11:56:27,826 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 122 [2018-10-24 11:56:27,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:27,827 INFO L225 Difference]: With dead ends: 139 [2018-10-24 11:56:27,827 INFO L226 Difference]: Without dead ends: 137 [2018-10-24 11:56:27,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 11:56:27,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-24 11:56:27,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2018-10-24 11:56:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-24 11:56:27,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2018-10-24 11:56:27,840 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 122 [2018-10-24 11:56:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:27,841 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2018-10-24 11:56:27,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 11:56:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2018-10-24 11:56:27,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-24 11:56:27,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:27,842 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:27,842 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:27,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:27,842 INFO L82 PathProgramCache]: Analyzing trace with hash -110519507, now seen corresponding path program 20 times [2018-10-24 11:56:27,842 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:27,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:27,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:27,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:27,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 570 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:28,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:28,948 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:28,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:56:29,005 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:56:29,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:29,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 567 proven. 315 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:56:29,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:29,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 48 [2018-10-24 11:56:29,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-24 11:56:29,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-24 11:56:29,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 11:56:29,460 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand 48 states. [2018-10-24 11:56:29,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:29,996 INFO L93 Difference]: Finished difference Result 292 states and 326 transitions. [2018-10-24 11:56:29,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-24 11:56:29,997 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 132 [2018-10-24 11:56:29,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:29,998 INFO L225 Difference]: With dead ends: 292 [2018-10-24 11:56:29,998 INFO L226 Difference]: Without dead ends: 211 [2018-10-24 11:56:29,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1038, Invalid=2868, Unknown=0, NotChecked=0, Total=3906 [2018-10-24 11:56:29,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-24 11:56:30,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 136. [2018-10-24 11:56:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-24 11:56:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2018-10-24 11:56:30,009 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 132 [2018-10-24 11:56:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:30,009 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2018-10-24 11:56:30,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-24 11:56:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2018-10-24 11:56:30,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-24 11:56:30,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:30,010 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:30,010 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:30,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:30,011 INFO L82 PathProgramCache]: Analyzing trace with hash -957767295, now seen corresponding path program 21 times [2018-10-24 11:56:30,011 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:30,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:30,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:30,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:30,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 570 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:31,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:31,121 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:31,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:56:31,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-24 11:56:31,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:31,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 570 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:31,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:31,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 50 [2018-10-24 11:56:31,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-24 11:56:31,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-24 11:56:31,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1857, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 11:56:31,983 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand 50 states. [2018-10-24 11:56:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:33,406 INFO L93 Difference]: Finished difference Result 302 states and 338 transitions. [2018-10-24 11:56:33,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-24 11:56:33,407 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 135 [2018-10-24 11:56:33,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:33,408 INFO L225 Difference]: With dead ends: 302 [2018-10-24 11:56:33,408 INFO L226 Difference]: Without dead ends: 219 [2018-10-24 11:56:33,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1153, Invalid=3137, Unknown=0, NotChecked=0, Total=4290 [2018-10-24 11:56:33,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-24 11:56:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 139. [2018-10-24 11:56:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-24 11:56:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2018-10-24 11:56:33,424 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 135 [2018-10-24 11:56:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:33,424 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2018-10-24 11:56:33,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-24 11:56:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2018-10-24 11:56:33,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-24 11:56:33,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:33,425 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:33,425 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:33,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:33,425 INFO L82 PathProgramCache]: Analyzing trace with hash 206178989, now seen corresponding path program 22 times [2018-10-24 11:56:33,425 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:33,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:33,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:33,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:33,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 408 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:33,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:33,784 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:33,792 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:56:33,844 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:56:33,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:33,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 408 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:33,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:33,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2018-10-24 11:56:33,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-24 11:56:33,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-24 11:56:33,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:56:33,964 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand 23 states. [2018-10-24 11:56:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:34,396 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2018-10-24 11:56:34,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-24 11:56:34,396 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 138 [2018-10-24 11:56:34,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:34,398 INFO L225 Difference]: With dead ends: 160 [2018-10-24 11:56:34,398 INFO L226 Difference]: Without dead ends: 158 [2018-10-24 11:56:34,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=556, Invalid=1004, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:56:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-24 11:56:34,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2018-10-24 11:56:34,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-24 11:56:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2018-10-24 11:56:34,413 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 138 [2018-10-24 11:56:34,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:34,414 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2018-10-24 11:56:34,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-24 11:56:34,414 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2018-10-24 11:56:34,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-24 11:56:34,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:34,415 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:34,415 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:34,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:34,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1013301555, now seen corresponding path program 23 times [2018-10-24 11:56:34,416 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:34,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:34,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:34,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:34,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 731 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:34,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:34,960 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:34,968 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:56:35,049 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-24 11:56:35,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:35,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 731 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:35,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:35,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2018-10-24 11:56:35,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-24 11:56:35,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-24 11:56:35,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=720, Invalid=2250, Unknown=0, NotChecked=0, Total=2970 [2018-10-24 11:56:35,713 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand 55 states. [2018-10-24 11:56:36,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:36,609 INFO L93 Difference]: Finished difference Result 328 states and 366 transitions. [2018-10-24 11:56:36,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-24 11:56:36,615 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 148 [2018-10-24 11:56:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:36,616 INFO L225 Difference]: With dead ends: 328 [2018-10-24 11:56:36,616 INFO L226 Difference]: Without dead ends: 237 [2018-10-24 11:56:36,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1349, Invalid=3763, Unknown=0, NotChecked=0, Total=5112 [2018-10-24 11:56:36,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-24 11:56:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 152. [2018-10-24 11:56:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-24 11:56:36,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2018-10-24 11:56:36,634 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 148 [2018-10-24 11:56:36,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:36,634 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2018-10-24 11:56:36,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-24 11:56:36,635 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2018-10-24 11:56:36,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-24 11:56:36,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:36,636 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:36,636 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:36,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:36,637 INFO L82 PathProgramCache]: Analyzing trace with hash 67837217, now seen corresponding path program 24 times [2018-10-24 11:56:36,637 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:36,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:36,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:36,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:36,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 731 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:37,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:37,269 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:37,281 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:56:37,354 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-24 11:56:37,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:37,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 731 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:37,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:37,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 56 [2018-10-24 11:56:37,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-24 11:56:37,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-24 11:56:37,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=2341, Unknown=0, NotChecked=0, Total=3080 [2018-10-24 11:56:37,954 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand 56 states. [2018-10-24 11:56:39,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:39,615 INFO L93 Difference]: Finished difference Result 338 states and 378 transitions. [2018-10-24 11:56:39,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-24 11:56:39,615 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 151 [2018-10-24 11:56:39,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:39,616 INFO L225 Difference]: With dead ends: 338 [2018-10-24 11:56:39,617 INFO L226 Difference]: Without dead ends: 245 [2018-10-24 11:56:39,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1441, Invalid=3961, Unknown=0, NotChecked=0, Total=5402 [2018-10-24 11:56:39,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-10-24 11:56:39,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 155. [2018-10-24 11:56:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-24 11:56:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2018-10-24 11:56:39,633 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 151 [2018-10-24 11:56:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:39,634 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2018-10-24 11:56:39,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-24 11:56:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2018-10-24 11:56:39,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-24 11:56:39,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:39,635 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:39,635 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:39,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:39,635 INFO L82 PathProgramCache]: Analyzing trace with hash 313241165, now seen corresponding path program 25 times [2018-10-24 11:56:39,635 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:39,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:39,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:39,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:39,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 513 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:40,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:40,028 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:40,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:40,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 513 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:40,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:40,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-24 11:56:40,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 11:56:40,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 11:56:40,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:56:40,181 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand 24 states. [2018-10-24 11:56:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:40,671 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2018-10-24 11:56:40,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-24 11:56:40,671 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 154 [2018-10-24 11:56:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:40,673 INFO L225 Difference]: With dead ends: 171 [2018-10-24 11:56:40,673 INFO L226 Difference]: Without dead ends: 169 [2018-10-24 11:56:40,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:56:40,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-24 11:56:40,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2018-10-24 11:56:40,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-24 11:56:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2018-10-24 11:56:40,690 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 154 [2018-10-24 11:56:40,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:40,690 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2018-10-24 11:56:40,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 11:56:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2018-10-24 11:56:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-24 11:56:40,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:40,691 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:40,691 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:40,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:40,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1317283219, now seen corresponding path program 26 times [2018-10-24 11:56:40,692 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:40,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:40,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:40,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:40,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 912 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:41,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:41,389 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:41,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:56:41,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:56:41,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:41,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 909 proven. 513 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:56:43,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:43,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 60 [2018-10-24 11:56:43,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-24 11:56:43,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-24 11:56:43,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2018-10-24 11:56:43,525 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand 60 states. [2018-10-24 11:56:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:44,559 INFO L93 Difference]: Finished difference Result 364 states and 406 transitions. [2018-10-24 11:56:44,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-24 11:56:44,559 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 164 [2018-10-24 11:56:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:44,560 INFO L225 Difference]: With dead ends: 364 [2018-10-24 11:56:44,560 INFO L226 Difference]: Without dead ends: 263 [2018-10-24 11:56:44,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1618, Invalid=4544, Unknown=0, NotChecked=0, Total=6162 [2018-10-24 11:56:44,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-24 11:56:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 168. [2018-10-24 11:56:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-24 11:56:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 171 transitions. [2018-10-24 11:56:44,578 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 171 transitions. Word has length 164 [2018-10-24 11:56:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:44,578 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 171 transitions. [2018-10-24 11:56:44,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-24 11:56:44,578 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 171 transitions. [2018-10-24 11:56:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-24 11:56:44,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:44,579 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:44,580 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:44,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:44,580 INFO L82 PathProgramCache]: Analyzing trace with hash -668102463, now seen corresponding path program 27 times [2018-10-24 11:56:44,580 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:44,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:44,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:44,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:44,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 912 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:45,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:45,332 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:45,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:56:45,419 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-10-24 11:56:45,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:45,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 912 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:46,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:46,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 62 [2018-10-24 11:56:46,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-24 11:56:46,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-24 11:56:46,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2881, Unknown=0, NotChecked=0, Total=3782 [2018-10-24 11:56:46,224 INFO L87 Difference]: Start difference. First operand 168 states and 171 transitions. Second operand 62 states. [2018-10-24 11:56:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:47,356 INFO L93 Difference]: Finished difference Result 374 states and 418 transitions. [2018-10-24 11:56:47,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-24 11:56:47,357 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 167 [2018-10-24 11:56:47,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:47,359 INFO L225 Difference]: With dead ends: 374 [2018-10-24 11:56:47,359 INFO L226 Difference]: Without dead ends: 271 [2018-10-24 11:56:47,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1761, Invalid=4881, Unknown=0, NotChecked=0, Total=6642 [2018-10-24 11:56:47,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-24 11:56:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 171. [2018-10-24 11:56:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-24 11:56:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2018-10-24 11:56:47,378 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 167 [2018-10-24 11:56:47,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:47,378 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2018-10-24 11:56:47,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-24 11:56:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2018-10-24 11:56:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-24 11:56:47,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:47,380 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:47,380 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:47,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:47,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1161934355, now seen corresponding path program 28 times [2018-10-24 11:56:47,380 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:47,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:47,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:47,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:47,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 630 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:48,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:48,537 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:48,545 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:56:48,613 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:56:48,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:48,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 630 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:48,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:48,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2018-10-24 11:56:48,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-24 11:56:48,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-24 11:56:48,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:56:48,749 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand 27 states. [2018-10-24 11:56:49,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:49,418 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-10-24 11:56:49,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-24 11:56:49,419 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 170 [2018-10-24 11:56:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:49,420 INFO L225 Difference]: With dead ends: 192 [2018-10-24 11:56:49,420 INFO L226 Difference]: Without dead ends: 190 [2018-10-24 11:56:49,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=810, Invalid=1446, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 11:56:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-24 11:56:49,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 181. [2018-10-24 11:56:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-24 11:56:49,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2018-10-24 11:56:49,445 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 170 [2018-10-24 11:56:49,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:49,446 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2018-10-24 11:56:49,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-24 11:56:49,446 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2018-10-24 11:56:49,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-24 11:56:49,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:49,448 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:49,448 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:49,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:49,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1916300813, now seen corresponding path program 29 times [2018-10-24 11:56:49,448 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:49,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:49,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:49,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:49,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 1113 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:50,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:50,831 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:50,838 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:56:50,943 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-24 11:56:50,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:50,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 1113 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:52,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:52,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2018-10-24 11:56:52,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-24 11:56:52,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-24 11:56:52,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=3366, Unknown=0, NotChecked=0, Total=4422 [2018-10-24 11:56:52,112 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand 67 states. [2018-10-24 11:56:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:53,109 INFO L93 Difference]: Finished difference Result 400 states and 446 transitions. [2018-10-24 11:56:53,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-24 11:56:53,109 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 180 [2018-10-24 11:56:53,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:53,112 INFO L225 Difference]: With dead ends: 400 [2018-10-24 11:56:53,112 INFO L226 Difference]: Without dead ends: 289 [2018-10-24 11:56:53,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2001, Invalid=5655, Unknown=0, NotChecked=0, Total=7656 [2018-10-24 11:56:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-10-24 11:56:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 184. [2018-10-24 11:56:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-24 11:56:53,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2018-10-24 11:56:53,134 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 180 [2018-10-24 11:56:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:53,134 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2018-10-24 11:56:53,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-24 11:56:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2018-10-24 11:56:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-24 11:56:53,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:53,136 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:53,136 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:53,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1383791713, now seen corresponding path program 30 times [2018-10-24 11:56:53,136 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:53,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:53,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:53,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:53,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 1113 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:54,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:54,483 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:54,490 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:56:54,579 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-24 11:56:54,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:54,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 1113 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:56,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:56,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 68 [2018-10-24 11:56:56,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-24 11:56:56,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-24 11:56:56,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1079, Invalid=3477, Unknown=0, NotChecked=0, Total=4556 [2018-10-24 11:56:56,640 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand 68 states. [2018-10-24 11:56:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:57,845 INFO L93 Difference]: Finished difference Result 410 states and 458 transitions. [2018-10-24 11:56:57,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-24 11:56:57,845 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 183 [2018-10-24 11:56:57,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:57,847 INFO L225 Difference]: With dead ends: 410 [2018-10-24 11:56:57,847 INFO L226 Difference]: Without dead ends: 297 [2018-10-24 11:56:57,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2113, Invalid=5897, Unknown=0, NotChecked=0, Total=8010 [2018-10-24 11:56:57,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-10-24 11:56:57,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 187. [2018-10-24 11:56:57,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-24 11:56:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2018-10-24 11:56:57,869 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 183 [2018-10-24 11:56:57,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:57,869 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2018-10-24 11:56:57,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-24 11:56:57,870 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2018-10-24 11:56:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-24 11:56:57,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:57,871 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:57,871 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:57,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:57,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1280582259, now seen corresponding path program 31 times [2018-10-24 11:56:57,871 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:57,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:57,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:57,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:57,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 759 proven. 1113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:58,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:58,686 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:58,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:58,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 759 proven. 1113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:58,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:58,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-24 11:56:58,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-24 11:56:58,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-24 11:56:58,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:56:58,868 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand 28 states. [2018-10-24 11:56:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:59,349 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2018-10-24 11:56:59,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-24 11:56:59,349 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 186 [2018-10-24 11:56:59,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:59,351 INFO L225 Difference]: With dead ends: 203 [2018-10-24 11:56:59,351 INFO L226 Difference]: Without dead ends: 201 [2018-10-24 11:56:59,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-10-24 11:56:59,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-24 11:56:59,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2018-10-24 11:56:59,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-24 11:56:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2018-10-24 11:56:59,374 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 186 [2018-10-24 11:56:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:59,374 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2018-10-24 11:56:59,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-24 11:56:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2018-10-24 11:56:59,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-24 11:56:59,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:59,376 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:59,376 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:59,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:59,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1215953325, now seen corresponding path program 32 times [2018-10-24 11:56:59,376 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:59,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:59,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:59,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:59,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 1334 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:00,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:00,254 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:00,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:00,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:00,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:00,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 1331 proven. 759 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:57:01,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:01,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 72 [2018-10-24 11:57:01,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-24 11:57:01,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-24 11:57:01,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2018-10-24 11:57:01,401 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand 72 states. [2018-10-24 11:57:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:02,829 INFO L93 Difference]: Finished difference Result 436 states and 486 transitions. [2018-10-24 11:57:02,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-24 11:57:02,829 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 196 [2018-10-24 11:57:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:02,830 INFO L225 Difference]: With dead ends: 436 [2018-10-24 11:57:02,830 INFO L226 Difference]: Without dead ends: 315 [2018-10-24 11:57:02,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2326, Invalid=6604, Unknown=0, NotChecked=0, Total=8930 [2018-10-24 11:57:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-24 11:57:02,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 200. [2018-10-24 11:57:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-24 11:57:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 203 transitions. [2018-10-24 11:57:02,851 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 203 transitions. Word has length 196 [2018-10-24 11:57:02,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:02,851 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 203 transitions. [2018-10-24 11:57:02,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-24 11:57:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 203 transitions. [2018-10-24 11:57:02,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-24 11:57:02,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:02,852 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:02,852 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:02,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash 362635265, now seen corresponding path program 33 times [2018-10-24 11:57:02,853 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:02,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:02,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:02,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:02,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 1334 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:04,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:04,039 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:04,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:57:04,148 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-24 11:57:04,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:04,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 1334 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:05,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:05,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 74 [2018-10-24 11:57:05,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-24 11:57:05,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-24 11:57:05,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2018-10-24 11:57:05,274 INFO L87 Difference]: Start difference. First operand 200 states and 203 transitions. Second operand 74 states. [2018-10-24 11:57:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:06,528 INFO L93 Difference]: Finished difference Result 446 states and 498 transitions. [2018-10-24 11:57:06,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-24 11:57:06,528 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 199 [2018-10-24 11:57:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:06,530 INFO L225 Difference]: With dead ends: 446 [2018-10-24 11:57:06,530 INFO L226 Difference]: Without dead ends: 323 [2018-10-24 11:57:06,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2497, Invalid=7009, Unknown=0, NotChecked=0, Total=9506 [2018-10-24 11:57:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-10-24 11:57:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 203. [2018-10-24 11:57:06,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-24 11:57:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2018-10-24 11:57:06,554 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 199 [2018-10-24 11:57:06,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:06,555 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2018-10-24 11:57:06,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-24 11:57:06,555 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2018-10-24 11:57:06,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-24 11:57:06,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:06,556 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:06,556 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:06,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:06,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1075734829, now seen corresponding path program 34 times [2018-10-24 11:57:06,557 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:06,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:06,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:06,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:06,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 900 proven. 1334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:07,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:07,763 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:07,771 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:57:07,850 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:57:07,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:07,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 900 proven. 1334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:08,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:08,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2018-10-24 11:57:08,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-24 11:57:08,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-24 11:57:08,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:57:08,070 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand 31 states. [2018-10-24 11:57:08,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:08,649 INFO L93 Difference]: Finished difference Result 224 states and 230 transitions. [2018-10-24 11:57:08,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-24 11:57:08,650 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 202 [2018-10-24 11:57:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:08,651 INFO L225 Difference]: With dead ends: 224 [2018-10-24 11:57:08,651 INFO L226 Difference]: Without dead ends: 222 [2018-10-24 11:57:08,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1112, Invalid=1968, Unknown=0, NotChecked=0, Total=3080 [2018-10-24 11:57:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-24 11:57:08,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 213. [2018-10-24 11:57:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-10-24 11:57:08,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2018-10-24 11:57:08,674 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 202 [2018-10-24 11:57:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:08,674 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2018-10-24 11:57:08,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-24 11:57:08,674 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2018-10-24 11:57:08,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-24 11:57:08,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:08,676 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:08,676 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:08,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:08,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1435861683, now seen corresponding path program 35 times [2018-10-24 11:57:08,676 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:08,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:08,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:08,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:08,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 1575 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:09,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:09,698 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:09,705 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:57:09,809 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-24 11:57:09,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:09,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 1575 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:10,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:10,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-10-24 11:57:10,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-24 11:57:10,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-24 11:57:10,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=4706, Unknown=0, NotChecked=0, Total=6162 [2018-10-24 11:57:10,941 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand 79 states. [2018-10-24 11:57:12,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:12,532 INFO L93 Difference]: Finished difference Result 472 states and 526 transitions. [2018-10-24 11:57:12,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-24 11:57:12,532 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 212 [2018-10-24 11:57:12,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:12,534 INFO L225 Difference]: With dead ends: 472 [2018-10-24 11:57:12,534 INFO L226 Difference]: Without dead ends: 341 [2018-10-24 11:57:12,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2781, Invalid=7931, Unknown=0, NotChecked=0, Total=10712 [2018-10-24 11:57:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2018-10-24 11:57:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 216. [2018-10-24 11:57:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-10-24 11:57:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 219 transitions. [2018-10-24 11:57:12,557 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 219 transitions. Word has length 212 [2018-10-24 11:57:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:12,557 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 219 transitions. [2018-10-24 11:57:12,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-24 11:57:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 219 transitions. [2018-10-24 11:57:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-24 11:57:12,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:12,558 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:12,558 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:12,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:12,558 INFO L82 PathProgramCache]: Analyzing trace with hash -138495071, now seen corresponding path program 36 times [2018-10-24 11:57:12,558 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:12,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:12,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:12,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:12,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 1575 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:13,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:13,659 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:13,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:57:13,862 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-24 11:57:13,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:13,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 1575 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:15,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:15,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 80 [2018-10-24 11:57:15,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-24 11:57:15,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-24 11:57:15,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4837, Unknown=0, NotChecked=0, Total=6320 [2018-10-24 11:57:15,165 INFO L87 Difference]: Start difference. First operand 216 states and 219 transitions. Second operand 80 states. [2018-10-24 11:57:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:16,570 INFO L93 Difference]: Finished difference Result 482 states and 538 transitions. [2018-10-24 11:57:16,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-24 11:57:16,571 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 215 [2018-10-24 11:57:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:16,573 INFO L225 Difference]: With dead ends: 482 [2018-10-24 11:57:16,573 INFO L226 Difference]: Without dead ends: 349 [2018-10-24 11:57:16,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2913, Invalid=8217, Unknown=0, NotChecked=0, Total=11130 [2018-10-24 11:57:16,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2018-10-24 11:57:16,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 219. [2018-10-24 11:57:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-24 11:57:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2018-10-24 11:57:16,593 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 215 [2018-10-24 11:57:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:16,593 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2018-10-24 11:57:16,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-24 11:57:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2018-10-24 11:57:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-24 11:57:16,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:16,595 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:16,595 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:16,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:16,595 INFO L82 PathProgramCache]: Analyzing trace with hash -700453683, now seen corresponding path program 37 times [2018-10-24 11:57:16,595 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:16,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:16,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:16,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:16,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1053 proven. 1575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:17,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:17,271 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:17,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:17,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1053 proven. 1575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:17,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:17,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-24 11:57:17,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-24 11:57:17,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-24 11:57:17,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:57:17,532 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand 32 states. [2018-10-24 11:57:18,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:18,135 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2018-10-24 11:57:18,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-24 11:57:18,135 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 218 [2018-10-24 11:57:18,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:18,136 INFO L225 Difference]: With dead ends: 235 [2018-10-24 11:57:18,136 INFO L226 Difference]: Without dead ends: 233 [2018-10-24 11:57:18,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-10-24 11:57:18,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-24 11:57:18,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-10-24 11:57:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-24 11:57:18,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 232 transitions. [2018-10-24 11:57:18,166 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 232 transitions. Word has length 218 [2018-10-24 11:57:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:18,167 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 232 transitions. [2018-10-24 11:57:18,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-24 11:57:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 232 transitions. [2018-10-24 11:57:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-24 11:57:18,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:18,168 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:18,168 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:18,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:18,169 INFO L82 PathProgramCache]: Analyzing trace with hash -508299027, now seen corresponding path program 38 times [2018-10-24 11:57:18,169 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:18,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:18,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:18,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:18,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1836 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:19,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:19,396 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:19,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:19,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:19,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:19,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1833 proven. 1053 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:57:21,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:21,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 84 [2018-10-24 11:57:21,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-24 11:57:21,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-24 11:57:21,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2018-10-24 11:57:21,552 INFO L87 Difference]: Start difference. First operand 229 states and 232 transitions. Second operand 84 states. [2018-10-24 11:57:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:23,125 INFO L93 Difference]: Finished difference Result 508 states and 566 transitions. [2018-10-24 11:57:23,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-24 11:57:23,125 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 228 [2018-10-24 11:57:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:23,126 INFO L225 Difference]: With dead ends: 508 [2018-10-24 11:57:23,127 INFO L226 Difference]: Without dead ends: 367 [2018-10-24 11:57:23,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3162, Invalid=9048, Unknown=0, NotChecked=0, Total=12210 [2018-10-24 11:57:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-10-24 11:57:23,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 232. [2018-10-24 11:57:23,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-24 11:57:23,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 235 transitions. [2018-10-24 11:57:23,150 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 235 transitions. Word has length 228 [2018-10-24 11:57:23,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:23,150 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 235 transitions. [2018-10-24 11:57:23,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-24 11:57:23,150 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 235 transitions. [2018-10-24 11:57:23,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-24 11:57:23,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:23,151 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:23,151 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:23,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:23,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1568075967, now seen corresponding path program 39 times [2018-10-24 11:57:23,151 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:23,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:23,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:23,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:23,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 1836 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:24,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:24,470 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:24,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:57:24,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-24 11:57:24,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:24,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 1836 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:25,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:25,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 86 [2018-10-24 11:57:25,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-24 11:57:25,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-24 11:57:25,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1709, Invalid=5601, Unknown=0, NotChecked=0, Total=7310 [2018-10-24 11:57:25,888 INFO L87 Difference]: Start difference. First operand 232 states and 235 transitions. Second operand 86 states. [2018-10-24 11:57:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:27,595 INFO L93 Difference]: Finished difference Result 518 states and 578 transitions. [2018-10-24 11:57:27,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-24 11:57:27,595 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 231 [2018-10-24 11:57:27,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:27,597 INFO L225 Difference]: With dead ends: 518 [2018-10-24 11:57:27,597 INFO L226 Difference]: Without dead ends: 375 [2018-10-24 11:57:27,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2592 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3361, Invalid=9521, Unknown=0, NotChecked=0, Total=12882 [2018-10-24 11:57:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-10-24 11:57:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 235. [2018-10-24 11:57:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-24 11:57:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 238 transitions. [2018-10-24 11:57:27,627 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 238 transitions. Word has length 231 [2018-10-24 11:57:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:27,627 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 238 transitions. [2018-10-24 11:57:27,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-24 11:57:27,627 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 238 transitions. [2018-10-24 11:57:27,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-24 11:57:27,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:27,629 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:27,629 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:27,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:27,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1078302611, now seen corresponding path program 40 times [2018-10-24 11:57:27,629 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:27,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:27,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:27,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:27,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3054 backedges. 1218 proven. 1836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:28,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:28,619 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:28,626 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:57:28,718 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:57:28,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:28,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3054 backedges. 1218 proven. 1836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:28,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:28,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2018-10-24 11:57:28,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-24 11:57:28,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-24 11:57:28,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 11:57:28,862 INFO L87 Difference]: Start difference. First operand 235 states and 238 transitions. Second operand 35 states. [2018-10-24 11:57:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:29,640 INFO L93 Difference]: Finished difference Result 256 states and 262 transitions. [2018-10-24 11:57:29,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-24 11:57:29,640 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 234 [2018-10-24 11:57:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:29,641 INFO L225 Difference]: With dead ends: 256 [2018-10-24 11:57:29,641 INFO L226 Difference]: Without dead ends: 254 [2018-10-24 11:57:29,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1462, Invalid=2570, Unknown=0, NotChecked=0, Total=4032 [2018-10-24 11:57:29,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-24 11:57:29,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 245. [2018-10-24 11:57:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-24 11:57:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 248 transitions. [2018-10-24 11:57:29,676 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 248 transitions. Word has length 234 [2018-10-24 11:57:29,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:29,676 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 248 transitions. [2018-10-24 11:57:29,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-24 11:57:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 248 transitions. [2018-10-24 11:57:29,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-24 11:57:29,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:29,678 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:29,678 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:29,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:29,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1417646963, now seen corresponding path program 41 times [2018-10-24 11:57:29,679 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:29,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:29,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:29,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:29,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:30,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 2117 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:30,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:30,968 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:30,975 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:57:31,109 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-24 11:57:31,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:31,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 2117 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:32,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:32,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 91 [2018-10-24 11:57:32,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-24 11:57:32,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-24 11:57:32,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1920, Invalid=6270, Unknown=0, NotChecked=0, Total=8190 [2018-10-24 11:57:32,898 INFO L87 Difference]: Start difference. First operand 245 states and 248 transitions. Second operand 91 states. [2018-10-24 11:57:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:34,528 INFO L93 Difference]: Finished difference Result 544 states and 606 transitions. [2018-10-24 11:57:34,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-24 11:57:34,528 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 244 [2018-10-24 11:57:34,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:34,530 INFO L225 Difference]: With dead ends: 544 [2018-10-24 11:57:34,530 INFO L226 Difference]: Without dead ends: 393 [2018-10-24 11:57:34,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3689, Invalid=10591, Unknown=0, NotChecked=0, Total=14280 [2018-10-24 11:57:34,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-10-24 11:57:34,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 248. [2018-10-24 11:57:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-10-24 11:57:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 251 transitions. [2018-10-24 11:57:34,564 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 251 transitions. Word has length 244 [2018-10-24 11:57:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:34,565 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 251 transitions. [2018-10-24 11:57:34,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-24 11:57:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 251 transitions. [2018-10-24 11:57:34,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-24 11:57:34,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:34,566 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:34,566 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:34,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:34,567 INFO L82 PathProgramCache]: Analyzing trace with hash 858151649, now seen corresponding path program 42 times [2018-10-24 11:57:34,567 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:34,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:34,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:34,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:34,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 2117 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:35,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:35,943 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:35,951 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:57:36,078 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-10-24 11:57:36,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:36,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 2117 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:37,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:37,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 92 [2018-10-24 11:57:37,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-24 11:57:37,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-24 11:57:37,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=6421, Unknown=0, NotChecked=0, Total=8372 [2018-10-24 11:57:37,976 INFO L87 Difference]: Start difference. First operand 248 states and 251 transitions. Second operand 92 states. [2018-10-24 11:57:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:39,860 INFO L93 Difference]: Finished difference Result 554 states and 618 transitions. [2018-10-24 11:57:39,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-24 11:57:39,860 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 247 [2018-10-24 11:57:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:39,862 INFO L225 Difference]: With dead ends: 554 [2018-10-24 11:57:39,863 INFO L226 Difference]: Without dead ends: 401 [2018-10-24 11:57:39,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3841, Invalid=10921, Unknown=0, NotChecked=0, Total=14762 [2018-10-24 11:57:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2018-10-24 11:57:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 251. [2018-10-24 11:57:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-24 11:57:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 254 transitions. [2018-10-24 11:57:39,896 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 254 transitions. Word has length 247 [2018-10-24 11:57:39,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:39,896 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 254 transitions. [2018-10-24 11:57:39,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-24 11:57:39,896 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 254 transitions. [2018-10-24 11:57:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-24 11:57:39,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:39,897 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:39,897 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:39,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:39,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1179132915, now seen corresponding path program 43 times [2018-10-24 11:57:39,898 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:39,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:39,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:39,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:39,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3512 backedges. 1395 proven. 2117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:40,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:40,691 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:40,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:40,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3512 backedges. 1395 proven. 2117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:40,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:40,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-24 11:57:40,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-24 11:57:40,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-24 11:57:40,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:57:40,938 INFO L87 Difference]: Start difference. First operand 251 states and 254 transitions. Second operand 36 states. [2018-10-24 11:57:41,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:41,644 INFO L93 Difference]: Finished difference Result 267 states and 271 transitions. [2018-10-24 11:57:41,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-24 11:57:41,645 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 250 [2018-10-24 11:57:41,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:41,646 INFO L225 Difference]: With dead ends: 267 [2018-10-24 11:57:41,646 INFO L226 Difference]: Without dead ends: 265 [2018-10-24 11:57:41,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-10-24 11:57:41,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-10-24 11:57:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 261. [2018-10-24 11:57:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-10-24 11:57:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 264 transitions. [2018-10-24 11:57:41,677 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 264 transitions. Word has length 250 [2018-10-24 11:57:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:41,677 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 264 transitions. [2018-10-24 11:57:41,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-24 11:57:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 264 transitions. [2018-10-24 11:57:41,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-10-24 11:57:41,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:41,679 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:41,679 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:41,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:41,680 INFO L82 PathProgramCache]: Analyzing trace with hash -663103443, now seen corresponding path program 44 times [2018-10-24 11:57:41,680 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:41,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:41,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:41,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:41,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 2418 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:43,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:43,325 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:43,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:43,439 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:43,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:43,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 2415 proven. 1395 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:57:45,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:45,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64] total 96 [2018-10-24 11:57:45,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-24 11:57:45,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-24 11:57:45,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2111, Invalid=7009, Unknown=0, NotChecked=0, Total=9120 [2018-10-24 11:57:45,125 INFO L87 Difference]: Start difference. First operand 261 states and 264 transitions. Second operand 96 states. [2018-10-24 11:57:47,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:47,470 INFO L93 Difference]: Finished difference Result 580 states and 646 transitions. [2018-10-24 11:57:47,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-24 11:57:47,471 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 260 [2018-10-24 11:57:47,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:47,472 INFO L225 Difference]: With dead ends: 580 [2018-10-24 11:57:47,472 INFO L226 Difference]: Without dead ends: 419 [2018-10-24 11:57:47,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3285 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4126, Invalid=11876, Unknown=0, NotChecked=0, Total=16002 [2018-10-24 11:57:47,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-10-24 11:57:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 264. [2018-10-24 11:57:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-10-24 11:57:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 267 transitions. [2018-10-24 11:57:47,504 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 267 transitions. Word has length 260 [2018-10-24 11:57:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:47,504 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 267 transitions. [2018-10-24 11:57:47,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-24 11:57:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 267 transitions. [2018-10-24 11:57:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-10-24 11:57:47,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:47,505 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:47,506 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:47,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:47,506 INFO L82 PathProgramCache]: Analyzing trace with hash -633299327, now seen corresponding path program 45 times [2018-10-24 11:57:47,506 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:47,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:47,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:47,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:47,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 2418 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:49,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:49,183 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:49,191 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:57:49,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-10-24 11:57:49,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:49,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 2418 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:51,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:51,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 98 [2018-10-24 11:57:51,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-24 11:57:51,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-24 11:57:51,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2209, Invalid=7297, Unknown=0, NotChecked=0, Total=9506 [2018-10-24 11:57:51,186 INFO L87 Difference]: Start difference. First operand 264 states and 267 transitions. Second operand 98 states. [2018-10-24 11:57:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:53,609 INFO L93 Difference]: Finished difference Result 590 states and 658 transitions. [2018-10-24 11:57:53,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-24 11:57:53,609 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 263 [2018-10-24 11:57:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:53,611 INFO L225 Difference]: With dead ends: 590 [2018-10-24 11:57:53,611 INFO L226 Difference]: Without dead ends: 427 [2018-10-24 11:57:53,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3410 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4353, Invalid=12417, Unknown=0, NotChecked=0, Total=16770 [2018-10-24 11:57:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-10-24 11:57:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 267. [2018-10-24 11:57:53,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-10-24 11:57:53,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 270 transitions. [2018-10-24 11:57:53,640 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 270 transitions. Word has length 263 [2018-10-24 11:57:53,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:53,640 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 270 transitions. [2018-10-24 11:57:53,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-24 11:57:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 270 transitions. [2018-10-24 11:57:53,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-24 11:57:53,641 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:53,642 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:53,642 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:53,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:53,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1797109843, now seen corresponding path program 46 times [2018-10-24 11:57:53,642 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:53,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:53,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:53,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:53,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 1584 proven. 2418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:54,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:54,297 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:54,303 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:57:54,415 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:57:54,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:54,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 1584 proven. 2418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:54,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:54,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2018-10-24 11:57:54,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-24 11:57:54,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-24 11:57:54,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2018-10-24 11:57:54,636 INFO L87 Difference]: Start difference. First operand 267 states and 270 transitions. Second operand 39 states. [2018-10-24 11:57:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:55,473 INFO L93 Difference]: Finished difference Result 288 states and 294 transitions. [2018-10-24 11:57:55,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-24 11:57:55,473 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 266 [2018-10-24 11:57:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:55,474 INFO L225 Difference]: With dead ends: 288 [2018-10-24 11:57:55,474 INFO L226 Difference]: Without dead ends: 286 [2018-10-24 11:57:55,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1860, Invalid=3252, Unknown=0, NotChecked=0, Total=5112 [2018-10-24 11:57:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-10-24 11:57:55,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 277. [2018-10-24 11:57:55,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-10-24 11:57:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 280 transitions. [2018-10-24 11:57:55,504 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 280 transitions. Word has length 266 [2018-10-24 11:57:55,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:55,505 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 280 transitions. [2018-10-24 11:57:55,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-24 11:57:55,505 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 280 transitions. [2018-10-24 11:57:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-10-24 11:57:55,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:55,506 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:55,506 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:55,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:55,506 INFO L82 PathProgramCache]: Analyzing trace with hash -322290739, now seen corresponding path program 47 times [2018-10-24 11:57:55,506 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:55,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:55,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:55,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:55,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 2739 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:57,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:57,156 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:57,163 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:57:57,320 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-24 11:57:57,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:57,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 2739 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:59,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:59,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 103 [2018-10-24 11:57:59,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-24 11:57:59,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-24 11:57:59,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2448, Invalid=8058, Unknown=0, NotChecked=0, Total=10506 [2018-10-24 11:57:59,403 INFO L87 Difference]: Start difference. First operand 277 states and 280 transitions. Second operand 103 states. [2018-10-24 11:58:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:01,610 INFO L93 Difference]: Finished difference Result 616 states and 686 transitions. [2018-10-24 11:58:01,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-24 11:58:01,610 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 276 [2018-10-24 11:58:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:01,612 INFO L225 Difference]: With dead ends: 616 [2018-10-24 11:58:01,612 INFO L226 Difference]: Without dead ends: 445 [2018-10-24 11:58:01,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3793 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4725, Invalid=13635, Unknown=0, NotChecked=0, Total=18360 [2018-10-24 11:58:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2018-10-24 11:58:01,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 280. [2018-10-24 11:58:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-24 11:58:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 283 transitions. [2018-10-24 11:58:01,644 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 283 transitions. Word has length 276 [2018-10-24 11:58:01,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:01,644 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 283 transitions. [2018-10-24 11:58:01,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-24 11:58:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 283 transitions. [2018-10-24 11:58:01,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-24 11:58:01,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:01,646 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:01,646 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:01,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:01,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2080496161, now seen corresponding path program 48 times [2018-10-24 11:58:01,646 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:01,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:01,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:01,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:01,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 2739 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:03,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:03,870 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:03,877 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:58:04,047 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-24 11:58:04,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:04,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 2739 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:05,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:05,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 104 [2018-10-24 11:58:05,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-24 11:58:05,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-24 11:58:05,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2483, Invalid=8229, Unknown=0, NotChecked=0, Total=10712 [2018-10-24 11:58:05,951 INFO L87 Difference]: Start difference. First operand 280 states and 283 transitions. Second operand 104 states. [2018-10-24 11:58:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:08,728 INFO L93 Difference]: Finished difference Result 626 states and 698 transitions. [2018-10-24 11:58:08,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-24 11:58:08,728 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 279 [2018-10-24 11:58:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:08,730 INFO L225 Difference]: With dead ends: 626 [2018-10-24 11:58:08,730 INFO L226 Difference]: Without dead ends: 453 [2018-10-24 11:58:08,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4897, Invalid=14009, Unknown=0, NotChecked=0, Total=18906 [2018-10-24 11:58:08,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2018-10-24 11:58:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 283. [2018-10-24 11:58:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-10-24 11:58:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 286 transitions. [2018-10-24 11:58:08,762 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 286 transitions. Word has length 279 [2018-10-24 11:58:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:08,762 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 286 transitions. [2018-10-24 11:58:08,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-24 11:58:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 286 transitions. [2018-10-24 11:58:08,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-10-24 11:58:08,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:08,764 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:08,764 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:08,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:08,764 INFO L82 PathProgramCache]: Analyzing trace with hash -714888371, now seen corresponding path program 49 times [2018-10-24 11:58:08,765 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:08,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:08,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:08,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:08,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 1785 proven. 2739 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:09,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:09,553 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:09,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:09,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 1785 proven. 2739 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:09,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:09,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-24 11:58:09,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-24 11:58:09,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-24 11:58:09,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:58:09,805 INFO L87 Difference]: Start difference. First operand 283 states and 286 transitions. Second operand 40 states. [2018-10-24 11:58:10,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:10,608 INFO L93 Difference]: Finished difference Result 299 states and 303 transitions. [2018-10-24 11:58:10,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-24 11:58:10,609 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 282 [2018-10-24 11:58:10,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:10,610 INFO L225 Difference]: With dead ends: 299 [2018-10-24 11:58:10,610 INFO L226 Difference]: Without dead ends: 297 [2018-10-24 11:58:10,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-10-24 11:58:10,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-10-24 11:58:10,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2018-10-24 11:58:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-10-24 11:58:10,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 296 transitions. [2018-10-24 11:58:10,652 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 296 transitions. Word has length 282 [2018-10-24 11:58:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:10,652 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 296 transitions. [2018-10-24 11:58:10,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-24 11:58:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 296 transitions. [2018-10-24 11:58:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-24 11:58:10,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:10,653 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:10,654 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:10,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:10,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1071933587, now seen corresponding path program 50 times [2018-10-24 11:58:10,654 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:10,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:10,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:10,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:10,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 3080 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:12,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:12,498 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:12,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:58:12,632 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:58:12,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:12,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 3077 proven. 1785 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:58:14,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:14,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72] total 108 [2018-10-24 11:58:14,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-24 11:58:14,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-24 11:58:14,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=8893, Unknown=0, NotChecked=0, Total=11556 [2018-10-24 11:58:14,957 INFO L87 Difference]: Start difference. First operand 293 states and 296 transitions. Second operand 108 states. [2018-10-24 11:58:17,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:17,448 INFO L93 Difference]: Finished difference Result 652 states and 726 transitions. [2018-10-24 11:58:17,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-24 11:58:17,448 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 292 [2018-10-24 11:58:17,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:17,450 INFO L225 Difference]: With dead ends: 652 [2018-10-24 11:58:17,450 INFO L226 Difference]: Without dead ends: 471 [2018-10-24 11:58:17,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4199 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5218, Invalid=15088, Unknown=0, NotChecked=0, Total=20306 [2018-10-24 11:58:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-10-24 11:58:17,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 296. [2018-10-24 11:58:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-10-24 11:58:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 299 transitions. [2018-10-24 11:58:17,493 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 299 transitions. Word has length 292 [2018-10-24 11:58:17,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:17,494 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 299 transitions. [2018-10-24 11:58:17,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-24 11:58:17,494 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 299 transitions. [2018-10-24 11:58:17,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-10-24 11:58:17,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:17,495 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:17,495 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:17,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:17,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1343491521, now seen corresponding path program 51 times [2018-10-24 11:58:17,495 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:17,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:17,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:17,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:17,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 3080 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:19,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:19,613 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:19,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:58:19,786 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-24 11:58:19,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:19,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 3080 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:21,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:21,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 110 [2018-10-24 11:58:21,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-24 11:58:21,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-24 11:58:21,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2773, Invalid=9217, Unknown=0, NotChecked=0, Total=11990 [2018-10-24 11:58:21,860 INFO L87 Difference]: Start difference. First operand 296 states and 299 transitions. Second operand 110 states. [2018-10-24 11:58:24,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:24,910 INFO L93 Difference]: Finished difference Result 662 states and 738 transitions. [2018-10-24 11:58:24,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-24 11:58:24,910 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 295 [2018-10-24 11:58:24,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:24,912 INFO L225 Difference]: With dead ends: 662 [2018-10-24 11:58:24,912 INFO L226 Difference]: Without dead ends: 479 [2018-10-24 11:58:24,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5473, Invalid=15697, Unknown=0, NotChecked=0, Total=21170 [2018-10-24 11:58:24,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-10-24 11:58:24,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 299. [2018-10-24 11:58:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-24 11:58:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 302 transitions. [2018-10-24 11:58:24,949 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 302 transitions. Word has length 295 [2018-10-24 11:58:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:24,949 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 302 transitions. [2018-10-24 11:58:24,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-24 11:58:24,949 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 302 transitions. [2018-10-24 11:58:24,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-24 11:58:24,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:24,950 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:24,950 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:24,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:24,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1390806765, now seen corresponding path program 52 times [2018-10-24 11:58:24,951 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:24,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:24,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:24,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:24,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5078 backedges. 1998 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:25,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:25,746 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:25,754 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:58:25,882 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:58:25,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:25,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5078 backedges. 1998 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:26,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:26,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2018-10-24 11:58:26,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-24 11:58:26,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-24 11:58:26,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:58:26,043 INFO L87 Difference]: Start difference. First operand 299 states and 302 transitions. Second operand 43 states. [2018-10-24 11:58:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:27,011 INFO L93 Difference]: Finished difference Result 320 states and 326 transitions. [2018-10-24 11:58:27,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-24 11:58:27,011 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 298 [2018-10-24 11:58:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:27,013 INFO L225 Difference]: With dead ends: 320 [2018-10-24 11:58:27,013 INFO L226 Difference]: Without dead ends: 318 [2018-10-24 11:58:27,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2306, Invalid=4014, Unknown=0, NotChecked=0, Total=6320 [2018-10-24 11:58:27,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-10-24 11:58:27,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 309. [2018-10-24 11:58:27,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-10-24 11:58:27,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 312 transitions. [2018-10-24 11:58:27,053 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 312 transitions. Word has length 298 [2018-10-24 11:58:27,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:27,053 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 312 transitions. [2018-10-24 11:58:27,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-24 11:58:27,054 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 312 transitions. [2018-10-24 11:58:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-10-24 11:58:27,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:27,055 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:27,055 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:27,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:27,055 INFO L82 PathProgramCache]: Analyzing trace with hash 496495373, now seen corresponding path program 53 times [2018-10-24 11:58:27,055 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:27,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:27,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:27,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:27,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 3441 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:28,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:28,920 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:28,929 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:58:29,112 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-10-24 11:58:29,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:29,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 3441 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:31,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:31,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 115 [2018-10-24 11:58:31,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-10-24 11:58:31,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-10-24 11:58:31,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3040, Invalid=10070, Unknown=0, NotChecked=0, Total=13110 [2018-10-24 11:58:31,530 INFO L87 Difference]: Start difference. First operand 309 states and 312 transitions. Second operand 115 states. [2018-10-24 11:58:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:34,643 INFO L93 Difference]: Finished difference Result 688 states and 766 transitions. [2018-10-24 11:58:34,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-24 11:58:34,643 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 308 [2018-10-24 11:58:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:34,645 INFO L225 Difference]: With dead ends: 688 [2018-10-24 11:58:34,645 INFO L226 Difference]: Without dead ends: 497 [2018-10-24 11:58:34,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4771 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5889, Invalid=17063, Unknown=0, NotChecked=0, Total=22952 [2018-10-24 11:58:34,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2018-10-24 11:58:34,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 312. [2018-10-24 11:58:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2018-10-24 11:58:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 315 transitions. [2018-10-24 11:58:34,686 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 315 transitions. Word has length 308 [2018-10-24 11:58:34,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:34,686 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 315 transitions. [2018-10-24 11:58:34,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-10-24 11:58:34,686 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 315 transitions. [2018-10-24 11:58:34,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-10-24 11:58:34,687 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:34,688 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:34,688 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:34,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:34,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2120140447, now seen corresponding path program 54 times [2018-10-24 11:58:34,688 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:34,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:34,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:34,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:34,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 3441 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:36,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:36,612 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:36,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:58:36,806 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-24 11:58:36,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:36,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 3441 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:39,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:39,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 116 [2018-10-24 11:58:39,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-24 11:58:39,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-24 11:58:39,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3079, Invalid=10261, Unknown=0, NotChecked=0, Total=13340 [2018-10-24 11:58:39,125 INFO L87 Difference]: Start difference. First operand 312 states and 315 transitions. Second operand 116 states. [2018-10-24 11:58:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:41,880 INFO L93 Difference]: Finished difference Result 698 states and 778 transitions. [2018-10-24 11:58:41,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-24 11:58:41,881 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 311 [2018-10-24 11:58:41,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:41,882 INFO L225 Difference]: With dead ends: 698 [2018-10-24 11:58:41,882 INFO L226 Difference]: Without dead ends: 505 [2018-10-24 11:58:41,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4847 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6081, Invalid=17481, Unknown=0, NotChecked=0, Total=23562 [2018-10-24 11:58:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2018-10-24 11:58:41,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 315. [2018-10-24 11:58:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-24 11:58:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 318 transitions. [2018-10-24 11:58:41,922 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 318 transitions. Word has length 311 [2018-10-24 11:58:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:41,922 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 318 transitions. [2018-10-24 11:58:41,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-24 11:58:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 318 transitions. [2018-10-24 11:58:41,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-10-24 11:58:41,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:41,923 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:41,924 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:41,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:41,924 INFO L82 PathProgramCache]: Analyzing trace with hash -661431667, now seen corresponding path program 55 times [2018-10-24 11:58:41,924 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:41,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:41,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:41,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:41,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5664 backedges. 2223 proven. 3441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:42,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:42,740 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:42,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:42,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5664 backedges. 2223 proven. 3441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:43,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:43,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-24 11:58:43,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-24 11:58:43,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-24 11:58:43,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:58:43,243 INFO L87 Difference]: Start difference. First operand 315 states and 318 transitions. Second operand 44 states. [2018-10-24 11:58:44,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:44,225 INFO L93 Difference]: Finished difference Result 331 states and 335 transitions. [2018-10-24 11:58:44,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-24 11:58:44,225 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 314 [2018-10-24 11:58:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:44,226 INFO L225 Difference]: With dead ends: 331 [2018-10-24 11:58:44,226 INFO L226 Difference]: Without dead ends: 329 [2018-10-24 11:58:44,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-10-24 11:58:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2018-10-24 11:58:44,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 325. [2018-10-24 11:58:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-10-24 11:58:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 328 transitions. [2018-10-24 11:58:44,268 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 328 transitions. Word has length 314 [2018-10-24 11:58:44,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:44,268 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 328 transitions. [2018-10-24 11:58:44,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-24 11:58:44,268 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 328 transitions. [2018-10-24 11:58:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-10-24 11:58:44,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:44,269 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:44,269 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:44,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:44,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1676228269, now seen corresponding path program 56 times [2018-10-24 11:58:44,270 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:44,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:44,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:44,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:44,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 3822 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:46,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:46,532 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:46,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:58:46,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:58:46,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:46,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 3819 proven. 2223 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:58:49,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:49,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80] total 120 [2018-10-24 11:58:49,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-24 11:58:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-24 11:58:49,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3279, Invalid=11001, Unknown=0, NotChecked=0, Total=14280 [2018-10-24 11:58:49,186 INFO L87 Difference]: Start difference. First operand 325 states and 328 transitions. Second operand 120 states. [2018-10-24 11:58:52,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:52,028 INFO L93 Difference]: Finished difference Result 724 states and 806 transitions. [2018-10-24 11:58:52,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-24 11:58:52,028 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 324 [2018-10-24 11:58:52,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:52,030 INFO L225 Difference]: With dead ends: 724 [2018-10-24 11:58:52,030 INFO L226 Difference]: Without dead ends: 523 [2018-10-24 11:58:52,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5225 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6438, Invalid=18684, Unknown=0, NotChecked=0, Total=25122 [2018-10-24 11:58:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2018-10-24 11:58:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 328. [2018-10-24 11:58:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-24 11:58:52,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 331 transitions. [2018-10-24 11:58:52,073 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 331 transitions. Word has length 324 [2018-10-24 11:58:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:52,074 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 331 transitions. [2018-10-24 11:58:52,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-24 11:58:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 331 transitions. [2018-10-24 11:58:52,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-24 11:58:52,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:52,075 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:52,075 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:52,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:52,076 INFO L82 PathProgramCache]: Analyzing trace with hash -816620287, now seen corresponding path program 57 times [2018-10-24 11:58:52,076 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:52,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:52,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:52,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:52,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 3822 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:54,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:54,217 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:54,224 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:58:54,432 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-24 11:58:54,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:54,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 3822 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:57,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:57,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 122 [2018-10-24 11:58:57,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-24 11:58:57,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-24 11:58:57,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3401, Invalid=11361, Unknown=0, NotChecked=0, Total=14762 [2018-10-24 11:58:57,286 INFO L87 Difference]: Start difference. First operand 328 states and 331 transitions. Second operand 122 states. [2018-10-24 11:59:00,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:00,561 INFO L93 Difference]: Finished difference Result 734 states and 818 transitions. [2018-10-24 11:59:00,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-24 11:59:00,561 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 327 [2018-10-24 11:59:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:00,563 INFO L225 Difference]: With dead ends: 734 [2018-10-24 11:59:00,564 INFO L226 Difference]: Without dead ends: 531 [2018-10-24 11:59:00,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5382 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6721, Invalid=19361, Unknown=0, NotChecked=0, Total=26082 [2018-10-24 11:59:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-10-24 11:59:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 331. [2018-10-24 11:59:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-10-24 11:59:00,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 334 transitions. [2018-10-24 11:59:00,607 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 334 transitions. Word has length 327 [2018-10-24 11:59:00,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:00,607 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 334 transitions. [2018-10-24 11:59:00,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-24 11:59:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 334 transitions. [2018-10-24 11:59:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-10-24 11:59:00,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:00,609 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:00,609 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:00,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:00,609 INFO L82 PathProgramCache]: Analyzing trace with hash -988436947, now seen corresponding path program 58 times [2018-10-24 11:59:00,609 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:00,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:00,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:00,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:00,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6282 backedges. 2460 proven. 3822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:01,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:01,510 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:01,518 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:01,653 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:01,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:01,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6282 backedges. 2460 proven. 3822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:01,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:01,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 47 [2018-10-24 11:59:01,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-24 11:59:01,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-24 11:59:01,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2018-10-24 11:59:01,803 INFO L87 Difference]: Start difference. First operand 331 states and 334 transitions. Second operand 47 states. [2018-10-24 11:59:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:03,022 INFO L93 Difference]: Finished difference Result 352 states and 358 transitions. [2018-10-24 11:59:03,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-24 11:59:03,022 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 330 [2018-10-24 11:59:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:03,024 INFO L225 Difference]: With dead ends: 352 [2018-10-24 11:59:03,024 INFO L226 Difference]: Without dead ends: 350 [2018-10-24 11:59:03,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2800, Invalid=4856, Unknown=0, NotChecked=0, Total=7656 [2018-10-24 11:59:03,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-24 11:59:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 341. [2018-10-24 11:59:03,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-10-24 11:59:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 344 transitions. [2018-10-24 11:59:03,068 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 344 transitions. Word has length 330 [2018-10-24 11:59:03,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:03,068 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 344 transitions. [2018-10-24 11:59:03,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-24 11:59:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 344 transitions. [2018-10-24 11:59:03,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-24 11:59:03,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:03,070 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:03,070 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:03,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:03,071 INFO L82 PathProgramCache]: Analyzing trace with hash 624523853, now seen corresponding path program 59 times [2018-10-24 11:59:03,071 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:03,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:03,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:03,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:03,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6683 backedges. 4223 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:06,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:06,052 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:06,060 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:06,265 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-24 11:59:06,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:06,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6683 backedges. 4223 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:09,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:09,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 127 [2018-10-24 11:59:09,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-10-24 11:59:09,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-10-24 11:59:09,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3696, Invalid=12306, Unknown=0, NotChecked=0, Total=16002 [2018-10-24 11:59:09,080 INFO L87 Difference]: Start difference. First operand 341 states and 344 transitions. Second operand 127 states. [2018-10-24 11:59:11,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:11,981 INFO L93 Difference]: Finished difference Result 760 states and 846 transitions. [2018-10-24 11:59:11,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-24 11:59:11,981 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 340 [2018-10-24 11:59:11,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:11,983 INFO L225 Difference]: With dead ends: 760 [2018-10-24 11:59:11,983 INFO L226 Difference]: Without dead ends: 549 [2018-10-24 11:59:11,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5861 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=7181, Invalid=20875, Unknown=0, NotChecked=0, Total=28056 [2018-10-24 11:59:11,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2018-10-24 11:59:12,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 344. [2018-10-24 11:59:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2018-10-24 11:59:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 347 transitions. [2018-10-24 11:59:12,030 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 347 transitions. Word has length 340 [2018-10-24 11:59:12,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:12,030 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 347 transitions. [2018-10-24 11:59:12,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-10-24 11:59:12,030 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 347 transitions. [2018-10-24 11:59:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-10-24 11:59:12,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:12,032 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:12,032 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:12,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:12,032 INFO L82 PathProgramCache]: Analyzing trace with hash 726956193, now seen corresponding path program 60 times [2018-10-24 11:59:12,032 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:12,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:12,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:12,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:12,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 4223 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:14,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:14,389 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:14,396 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:59:14,602 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2018-10-24 11:59:14,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:14,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 4223 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:17,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:17,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 128 [2018-10-24 11:59:17,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-24 11:59:17,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-24 11:59:17,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3739, Invalid=12517, Unknown=0, NotChecked=0, Total=16256 [2018-10-24 11:59:17,719 INFO L87 Difference]: Start difference. First operand 344 states and 347 transitions. Second operand 128 states. [2018-10-24 11:59:21,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:21,357 INFO L93 Difference]: Finished difference Result 770 states and 858 transitions. [2018-10-24 11:59:21,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-24 11:59:21,358 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 343 [2018-10-24 11:59:21,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:21,359 INFO L225 Difference]: With dead ends: 770 [2018-10-24 11:59:21,360 INFO L226 Difference]: Without dead ends: 557 [2018-10-24 11:59:21,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5945 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=7393, Invalid=21337, Unknown=0, NotChecked=0, Total=28730 [2018-10-24 11:59:21,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2018-10-24 11:59:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 347. [2018-10-24 11:59:21,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-10-24 11:59:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 350 transitions. [2018-10-24 11:59:21,406 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 350 transitions. Word has length 343 [2018-10-24 11:59:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:21,406 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 350 transitions. [2018-10-24 11:59:21,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-24 11:59:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 350 transitions. [2018-10-24 11:59:21,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-10-24 11:59:21,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:21,408 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:21,408 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:21,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:21,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1432950323, now seen corresponding path program 61 times [2018-10-24 11:59:21,409 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:21,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:21,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:21,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:21,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6932 backedges. 2709 proven. 4223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:22,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:22,368 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:22,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:22,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6932 backedges. 2709 proven. 4223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:22,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:22,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-10-24 11:59:22,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-24 11:59:22,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-24 11:59:22,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 11:59:22,666 INFO L87 Difference]: Start difference. First operand 347 states and 350 transitions. Second operand 48 states. [2018-10-24 11:59:23,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:23,839 INFO L93 Difference]: Finished difference Result 363 states and 367 transitions. [2018-10-24 11:59:23,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-24 11:59:23,839 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 346 [2018-10-24 11:59:23,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:23,841 INFO L225 Difference]: With dead ends: 363 [2018-10-24 11:59:23,841 INFO L226 Difference]: Without dead ends: 361 [2018-10-24 11:59:23,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-10-24 11:59:23,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2018-10-24 11:59:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 357. [2018-10-24 11:59:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2018-10-24 11:59:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 360 transitions. [2018-10-24 11:59:23,891 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 360 transitions. Word has length 346 [2018-10-24 11:59:23,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:23,891 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 360 transitions. [2018-10-24 11:59:23,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-24 11:59:23,892 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 360 transitions. [2018-10-24 11:59:23,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2018-10-24 11:59:23,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:23,893 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:23,894 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:23,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:23,894 INFO L82 PathProgramCache]: Analyzing trace with hash -952977939, now seen corresponding path program 62 times [2018-10-24 11:59:23,894 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:23,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:23,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:23,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:23,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7353 backedges. 4644 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:26,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:26,662 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:26,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:26,812 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:26,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:26,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7353 backedges. 4641 proven. 2709 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:59:29,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:29,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88] total 132 [2018-10-24 11:59:29,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-24 11:59:29,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-24 11:59:29,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-10-24 11:59:29,815 INFO L87 Difference]: Start difference. First operand 357 states and 360 transitions. Second operand 132 states. [2018-10-24 11:59:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:33,314 INFO L93 Difference]: Finished difference Result 796 states and 886 transitions. [2018-10-24 11:59:33,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-24 11:59:33,314 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 356 [2018-10-24 11:59:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:33,316 INFO L225 Difference]: With dead ends: 796 [2018-10-24 11:59:33,316 INFO L226 Difference]: Without dead ends: 575 [2018-10-24 11:59:33,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6363 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=7786, Invalid=22664, Unknown=0, NotChecked=0, Total=30450 [2018-10-24 11:59:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-10-24 11:59:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 360. [2018-10-24 11:59:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2018-10-24 11:59:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 363 transitions. [2018-10-24 11:59:33,368 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 363 transitions. Word has length 356 [2018-10-24 11:59:33,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:33,368 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 363 transitions. [2018-10-24 11:59:33,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-24 11:59:33,369 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 363 transitions. [2018-10-24 11:59:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-10-24 11:59:33,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:33,370 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:33,370 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:33,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:33,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1531874369, now seen corresponding path program 63 times [2018-10-24 11:59:33,371 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:33,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:33,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:33,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:33,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 4644 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:36,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:36,200 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:36,208 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:36,438 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-10-24 11:59:36,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:36,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 4644 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:39,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:39,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 134 [2018-10-24 11:59:39,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-24 11:59:39,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-24 11:59:39,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4093, Invalid=13729, Unknown=0, NotChecked=0, Total=17822 [2018-10-24 11:59:39,552 INFO L87 Difference]: Start difference. First operand 360 states and 363 transitions. Second operand 134 states. [2018-10-24 11:59:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:43,194 INFO L93 Difference]: Finished difference Result 806 states and 898 transitions. [2018-10-24 11:59:43,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-24 11:59:43,195 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 359 [2018-10-24 11:59:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:43,197 INFO L225 Difference]: With dead ends: 806 [2018-10-24 11:59:43,197 INFO L226 Difference]: Without dead ends: 583 [2018-10-24 11:59:43,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6536 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=8097, Invalid=23409, Unknown=0, NotChecked=0, Total=31506 [2018-10-24 11:59:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2018-10-24 11:59:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 363. [2018-10-24 11:59:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-10-24 11:59:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 366 transitions. [2018-10-24 11:59:43,246 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 366 transitions. Word has length 359 [2018-10-24 11:59:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:43,246 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 366 transitions. [2018-10-24 11:59:43,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-24 11:59:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 366 transitions. [2018-10-24 11:59:43,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-10-24 11:59:43,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:43,247 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:43,247 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:43,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:43,248 INFO L82 PathProgramCache]: Analyzing trace with hash -289331859, now seen corresponding path program 64 times [2018-10-24 11:59:43,248 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:43,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:43,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:43,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:43,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7614 backedges. 2970 proven. 4644 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:44,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:44,333 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:44,342 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:44,493 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:44,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:44,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7614 backedges. 2970 proven. 4644 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:44,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:44,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 51 [2018-10-24 11:59:44,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-24 11:59:44,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-24 11:59:44,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2018-10-24 11:59:44,675 INFO L87 Difference]: Start difference. First operand 363 states and 366 transitions. Second operand 51 states. [2018-10-24 11:59:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:46,286 INFO L93 Difference]: Finished difference Result 384 states and 390 transitions. [2018-10-24 11:59:46,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-24 11:59:46,286 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 362 [2018-10-24 11:59:46,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:46,288 INFO L225 Difference]: With dead ends: 384 [2018-10-24 11:59:46,288 INFO L226 Difference]: Without dead ends: 382 [2018-10-24 11:59:46,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2115 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3342, Invalid=5778, Unknown=0, NotChecked=0, Total=9120 [2018-10-24 11:59:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2018-10-24 11:59:46,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 373. [2018-10-24 11:59:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2018-10-24 11:59:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 376 transitions. [2018-10-24 11:59:46,342 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 376 transitions. Word has length 362 [2018-10-24 11:59:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:46,342 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 376 transitions. [2018-10-24 11:59:46,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-24 11:59:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 376 transitions. [2018-10-24 11:59:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-10-24 11:59:46,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:46,344 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:46,344 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:46,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:46,345 INFO L82 PathProgramCache]: Analyzing trace with hash 587131277, now seen corresponding path program 65 times [2018-10-24 11:59:46,345 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:46,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:46,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:46,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:46,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8055 backedges. 5085 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:49,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:49,184 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:49,192 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:49,430 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-24 11:59:49,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:49,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8055 backedges. 5085 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:53,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:53,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 139 [2018-10-24 11:59:53,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-10-24 11:59:53,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-10-24 11:59:53,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4416, Invalid=14766, Unknown=0, NotChecked=0, Total=19182 [2018-10-24 11:59:53,010 INFO L87 Difference]: Start difference. First operand 373 states and 376 transitions. Second operand 139 states. [2018-10-24 11:59:57,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:57,212 INFO L93 Difference]: Finished difference Result 832 states and 926 transitions. [2018-10-24 11:59:57,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-24 11:59:57,212 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 372 [2018-10-24 11:59:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:57,215 INFO L225 Difference]: With dead ends: 832 [2018-10-24 11:59:57,215 INFO L226 Difference]: Without dead ends: 601 [2018-10-24 11:59:57,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7063 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=8601, Invalid=25071, Unknown=0, NotChecked=0, Total=33672 [2018-10-24 11:59:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2018-10-24 11:59:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 376. [2018-10-24 11:59:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-24 11:59:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 379 transitions. [2018-10-24 11:59:57,275 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 379 transitions. Word has length 372 [2018-10-24 11:59:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:57,275 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 379 transitions. [2018-10-24 11:59:57,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-10-24 11:59:57,275 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 379 transitions. [2018-10-24 11:59:57,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-24 11:59:57,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:57,276 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:57,277 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:57,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:57,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1737779231, now seen corresponding path program 66 times [2018-10-24 11:59:57,277 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:57,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:57,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:57,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:57,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 5085 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:00,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:00,093 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:00,100 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:00,339 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-24 12:00:00,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:00,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-24 12:00:02,021 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-24 12:00:02,222 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:02,223 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 12:00:02,228 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 12:00:02,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:00:02 BoogieIcfgContainer [2018-10-24 12:00:02,228 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:00:02,229 INFO L168 Benchmark]: Toolchain (without parser) took 237860.86 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -148.4 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-24 12:00:02,230 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:00:02,230 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:00:02,231 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:00:02,231 INFO L168 Benchmark]: Boogie Preprocessor took 22.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:00:02,231 INFO L168 Benchmark]: RCFGBuilder took 466.45 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -799.3 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:00:02,231 INFO L168 Benchmark]: TraceAbstraction took 237077.64 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 558.4 MB). Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 640.4 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-24 12:00:02,234 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 36.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 466.45 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -799.3 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237077.64 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 558.4 MB). Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 640.4 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 376 with TraceHistMax 46,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 117 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. TIMEOUT Result, 237.0s OverallTime, 69 OverallIterations, 46 TraceHistogramMax, 87.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4767 SDtfs, 15538 SDslu, 55908 SDs, 0 SdLazy, 41312 SolverSat, 6187 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17749 GetRequests, 12430 SyntacticMatches, 0 SemanticMatches, 5319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123470 ImplicationChecksByTransitivity, 153.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=376occurred in iteration=68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 68 MinimizatonAttempts, 5320 StatesRemovedByMinimization, 67 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 7.2s SatisfiabilityAnalysisTime, 129.3s InterpolantComputationTime, 25900 NumberOfCodeBlocks, 25900 NumberOfCodeBlocksAsserted, 913 NumberOfCheckSat, 25767 ConstructedInterpolants, 0 QuantifiedInterpolants, 26449354 SizeOfPredicates, 217 NumberOfNonLiveVariables, 38066 ConjunctsInSsa, 3345 ConjunctsInUnsatCore, 133 InterpolantComputations, 3 PerfectInterpolantSequences, 200047/362557 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown