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-new/count_by_nondet_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:50:46,547 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:50:46,549 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:50:46,561 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:50:46,561 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:50:46,563 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:50:46,564 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:50:46,566 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:50:46,569 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:50:46,570 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:50:46,571 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:50:46,571 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:50:46,572 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:50:46,575 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:50:46,581 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:50:46,582 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:50:46,583 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:50:46,585 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:50:46,586 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:50:46,588 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:50:46,589 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:50:46,590 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:50:46,592 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:50:46,600 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 [2018-10-22 15:50:46,614 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:50:46,614 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:50:46,615 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:50:46,615 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:50:46,616 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:50:46,616 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:50:46,616 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:50:46,616 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:50:46,616 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:50:46,616 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:50:46,617 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:50:46,617 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:50:46,617 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:50:46,617 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:50:46,617 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:50:46,618 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:50:46,618 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:50:46,618 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:50:46,618 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:50:46,618 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:50:46,619 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:50:46,619 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:50:46,619 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:50:46,619 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:50:46,619 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:50:46,620 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:50:46,620 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:50:46,620 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:50:46,670 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:50:46,689 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:50:46,693 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:50:46,694 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:50:46,695 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:50:46,695 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/count_by_nondet_true-unreach-call_true-termination.i [2018-10-22 15:50:46,757 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/036a4349d/5ba670873fdd43f89cbab76d909a8266/FLAG326de138f [2018-10-22 15:50:47,173 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:50:47,173 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet_true-unreach-call_true-termination.i [2018-10-22 15:50:47,179 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/036a4349d/5ba670873fdd43f89cbab76d909a8266/FLAG326de138f [2018-10-22 15:50:47,194 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/036a4349d/5ba670873fdd43f89cbab76d909a8266 [2018-10-22 15:50:47,205 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:50:47,206 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:50:47,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:50:47,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:50:47,211 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:50:47,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:50:47" (1/1) ... [2018-10-22 15:50:47,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c7845d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:47, skipping insertion in model container [2018-10-22 15:50:47,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:50:47" (1/1) ... [2018-10-22 15:50:47,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:50:47,254 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:50:47,474 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:50:47,479 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:50:47,498 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:50:47,517 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:50:47,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:47 WrapperNode [2018-10-22 15:50:47,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:50:47,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:50:47,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:50:47,519 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:50:47,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:47" (1/1) ... [2018-10-22 15:50:47,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:47" (1/1) ... [2018-10-22 15:50:47,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:50:47,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:50:47,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:50:47,560 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:50:47,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:47" (1/1) ... [2018-10-22 15:50:47,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:47" (1/1) ... [2018-10-22 15:50:47,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:47" (1/1) ... [2018-10-22 15:50:47,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:47" (1/1) ... [2018-10-22 15:50:47,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:47" (1/1) ... [2018-10-22 15:50:47,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:47" (1/1) ... [2018-10-22 15:50:47,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:47" (1/1) ... [2018-10-22 15:50:47,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:50:47,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:50:47,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:50:47,585 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:50:47,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:47" (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 [2018-10-22 15:50:47,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:50:47,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:50:47,890 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:50:47,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:50:47 BoogieIcfgContainer [2018-10-22 15:50:47,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:50:47,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:50:47,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:50:47,896 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:50:47,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:50:47" (1/3) ... [2018-10-22 15:50:47,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ef74d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:50:47, skipping insertion in model container [2018-10-22 15:50:47,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:47" (2/3) ... [2018-10-22 15:50:47,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ef74d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:50:47, skipping insertion in model container [2018-10-22 15:50:47,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:50:47" (3/3) ... [2018-10-22 15:50:47,901 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet_true-unreach-call_true-termination.i [2018-10-22 15:50:47,913 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:50:47,927 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:50:47,946 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:50:47,975 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:50:47,976 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:50:47,976 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:50:47,976 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:50:47,976 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:50:47,976 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:50:47,977 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:50:47,977 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:50:47,977 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:50:47,992 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-22 15:50:47,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-22 15:50:47,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:47,999 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-22 15:50:48,002 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:48,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:48,008 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2018-10-22 15:50:48,010 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:48,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:48,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:48,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,108 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:48,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:50:48,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:50:48,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:50:48,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:50:48,128 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-22 15:50:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:48,144 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-22 15:50:48,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:50:48,146 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-22 15:50:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:48,160 INFO L225 Difference]: With dead ends: 21 [2018-10-22 15:50:48,160 INFO L226 Difference]: Without dead ends: 9 [2018-10-22 15:50:48,164 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 [2018-10-22 15:50:48,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-22 15:50:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-22 15:50:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-22 15:50:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-22 15:50:48,199 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-22 15:50:48,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:48,200 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-22 15:50:48,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:50:48,200 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-22 15:50:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-22 15:50:48,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:48,201 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:48,201 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:48,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:48,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1805928624, now seen corresponding path program 1 times [2018-10-22 15:50:48,202 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:48,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:48,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:48,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,265 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:48,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:50:48,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:50:48,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:50:48,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:50:48,269 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2018-10-22 15:50:48,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:48,347 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-22 15:50:48,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:50:48,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-22 15:50:48,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:48,348 INFO L225 Difference]: With dead ends: 16 [2018-10-22 15:50:48,348 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 15:50:48,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:50:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 15:50:48,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-22 15:50:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-22 15:50:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-22 15:50:48,353 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2018-10-22 15:50:48,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:48,354 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-22 15:50:48,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:50:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-22 15:50:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:50:48,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:48,355 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:48,355 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:48,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:48,355 INFO L82 PathProgramCache]: Analyzing trace with hash -992267733, now seen corresponding path program 1 times [2018-10-22 15:50:48,356 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:48,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:48,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:48,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:48,444 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 [2018-10-22 15:50:48,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:48,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:48,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-22 15:50:48,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:50:48,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:50:48,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:50:48,537 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-10-22 15:50:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:48,619 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-22 15:50:48,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:50:48,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-22 15:50:48,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:48,620 INFO L225 Difference]: With dead ends: 18 [2018-10-22 15:50:48,620 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 15:50:48,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:50:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 15:50:48,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 15:50:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:50:48,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-22 15:50:48,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-10-22 15:50:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:48,625 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-22 15:50:48,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:50:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-22 15:50:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:50:48,626 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:48,627 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:48,628 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:48,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:48,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1039691056, now seen corresponding path program 2 times [2018-10-22 15:50:48,629 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:48,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:48,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:48,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:48,789 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 [2018-10-22 15:50:48,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:48,821 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:48,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:48,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:48,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-22 15:50:48,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:50:48,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:50:48,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:50:48,870 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-10-22 15:50:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:49,006 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-22 15:50:49,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:50:49,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-22 15:50:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:49,007 INFO L225 Difference]: With dead ends: 22 [2018-10-22 15:50:49,007 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:50:49,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:50:49,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:50:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-22 15:50:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 15:50:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-22 15:50:49,012 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-10-22 15:50:49,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:49,012 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-22 15:50:49,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:50:49,012 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-22 15:50:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:50:49,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:49,013 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:49,013 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:49,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:49,014 INFO L82 PathProgramCache]: Analyzing trace with hash -783666165, now seen corresponding path program 3 times [2018-10-22 15:50:49,014 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:49,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:49,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:49,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:49,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:49,312 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 [2018-10-22 15:50:49,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:49,375 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:50:49,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:49,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:49,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:49,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-22 15:50:49,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:50:49,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:50:49,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:50:49,432 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2018-10-22 15:50:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:49,477 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-22 15:50:49,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:50:49,478 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-10-22 15:50:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:49,479 INFO L225 Difference]: With dead ends: 25 [2018-10-22 15:50:49,479 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 15:50:49,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:50:49,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 15:50:49,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-10-22 15:50:49,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 15:50:49,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-22 15:50:49,484 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-10-22 15:50:49,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:49,484 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-22 15:50:49,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:50:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-22 15:50:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:50:49,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:49,485 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:49,486 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:49,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:49,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1408056080, now seen corresponding path program 4 times [2018-10-22 15:50:49,486 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:49,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:49,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:49,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:49,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:49,623 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 [2018-10-22 15:50:49,631 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:49,660 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:49,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:49,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:49,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:49,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-22 15:50:49,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:50:49,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:50:49,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:50:49,782 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2018-10-22 15:50:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:49,862 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-22 15:50:49,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:50:49,862 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-10-22 15:50:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:49,864 INFO L225 Difference]: With dead ends: 28 [2018-10-22 15:50:49,864 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 15:50:49,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:50:49,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 15:50:49,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-22 15:50:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-22 15:50:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-22 15:50:49,872 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-10-22 15:50:49,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:49,872 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-22 15:50:49,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:50:49,872 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-22 15:50:49,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 15:50:49,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:49,873 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:49,874 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:49,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:49,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1104654869, now seen corresponding path program 5 times [2018-10-22 15:50:49,874 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:49,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:49,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:49,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:50,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:50,027 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 [2018-10-22 15:50:50,040 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:50,061 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:50:50,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:50,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:50,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:50,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-22 15:50:50,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:50:50,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:50:50,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:50:50,124 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2018-10-22 15:50:50,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:50,327 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-22 15:50:50,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:50:50,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-10-22 15:50:50,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:50,331 INFO L225 Difference]: With dead ends: 31 [2018-10-22 15:50:50,331 INFO L226 Difference]: Without dead ends: 27 [2018-10-22 15:50:50,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:50:50,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-22 15:50:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-10-22 15:50:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-22 15:50:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-22 15:50:50,337 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-10-22 15:50:50,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:50,337 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-22 15:50:50,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:50:50,337 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-22 15:50:50,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 15:50:50,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:50,338 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:50,339 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:50,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:50,339 INFO L82 PathProgramCache]: Analyzing trace with hash 909631248, now seen corresponding path program 6 times [2018-10-22 15:50:50,339 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:50,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:50,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:50,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:50,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:50,611 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 [2018-10-22 15:50:50,621 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:50,640 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 15:50:50,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:50,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:50,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:50,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-22 15:50:50,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:50:50,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:50:50,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:50:50,690 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2018-10-22 15:50:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:50,809 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-22 15:50:50,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:50:50,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2018-10-22 15:50:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:50,812 INFO L225 Difference]: With dead ends: 34 [2018-10-22 15:50:50,812 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 15:50:50,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:50:50,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 15:50:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-22 15:50:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-22 15:50:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-22 15:50:50,817 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-10-22 15:50:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:50,817 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-22 15:50:50,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:50:50,818 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-22 15:50:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-22 15:50:50,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:50,819 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:50,819 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:50,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:50,819 INFO L82 PathProgramCache]: Analyzing trace with hash -775716917, now seen corresponding path program 7 times [2018-10-22 15:50:50,819 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:50,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:50,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:50,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:51,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:51,158 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 [2018-10-22 15:50:51,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:51,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:51,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:51,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-22 15:50:51,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:50:51,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:50:51,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:50:51,270 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2018-10-22 15:50:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:51,339 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-22 15:50:51,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:50:51,341 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2018-10-22 15:50:51,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:51,342 INFO L225 Difference]: With dead ends: 37 [2018-10-22 15:50:51,342 INFO L226 Difference]: Without dead ends: 33 [2018-10-22 15:50:51,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:50:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-22 15:50:51,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-10-22 15:50:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-22 15:50:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-22 15:50:51,347 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-10-22 15:50:51,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:51,347 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-22 15:50:51,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:50:51,348 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-22 15:50:51,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 15:50:51,349 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:51,349 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:51,349 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:51,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:51,350 INFO L82 PathProgramCache]: Analyzing trace with hash -815210192, now seen corresponding path program 8 times [2018-10-22 15:50:51,350 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:51,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:51,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:51,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:51,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:51,564 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 [2018-10-22 15:50:51,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:51,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:51,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:51,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:51,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:51,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-22 15:50:51,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:50:51,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:50:51,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:50:51,678 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 12 states. [2018-10-22 15:50:52,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:52,032 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-22 15:50:52,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:50:52,032 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2018-10-22 15:50:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:52,033 INFO L225 Difference]: With dead ends: 40 [2018-10-22 15:50:52,033 INFO L226 Difference]: Without dead ends: 36 [2018-10-22 15:50:52,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:50:52,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-22 15:50:52,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-22 15:50:52,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-22 15:50:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-22 15:50:52,044 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-10-22 15:50:52,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:52,045 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-22 15:50:52,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:50:52,045 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-22 15:50:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-22 15:50:52,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:52,046 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:52,047 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:52,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:52,047 INFO L82 PathProgramCache]: Analyzing trace with hash -538326613, now seen corresponding path program 9 times [2018-10-22 15:50:52,047 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:52,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:52,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:52,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:52,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:52,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:52,273 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 [2018-10-22 15:50:52,281 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:52,383 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 15:50:52,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:52,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:52,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:52,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-22 15:50:52,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:50:52,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:50:52,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:50:52,482 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 13 states. [2018-10-22 15:50:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:52,541 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-22 15:50:52,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:50:52,542 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-10-22 15:50:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:52,543 INFO L225 Difference]: With dead ends: 43 [2018-10-22 15:50:52,543 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 15:50:52,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:50:52,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 15:50:52,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-22 15:50:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-22 15:50:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-22 15:50:52,549 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-10-22 15:50:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:52,550 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-22 15:50:52,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:50:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-22 15:50:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-22 15:50:52,551 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:52,551 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:52,551 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:52,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:52,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1763167056, now seen corresponding path program 10 times [2018-10-22 15:50:52,552 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:52,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:52,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:52,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:52,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:52,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:52,960 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-22 15:50:52,968 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:52,989 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:52,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:52,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:53,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:53,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-22 15:50:53,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:50:53,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:50:53,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:50:53,044 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 14 states. [2018-10-22 15:50:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:53,104 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-22 15:50:53,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:50:53,105 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2018-10-22 15:50:53,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:53,106 INFO L225 Difference]: With dead ends: 46 [2018-10-22 15:50:53,106 INFO L226 Difference]: Without dead ends: 42 [2018-10-22 15:50:53,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:50:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-22 15:50:53,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-22 15:50:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-22 15:50:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-22 15:50:53,112 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-10-22 15:50:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:53,112 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-22 15:50:53,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:50:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-22 15:50:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-22 15:50:53,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:53,114 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:53,114 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:53,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:53,114 INFO L82 PathProgramCache]: Analyzing trace with hash 703146891, now seen corresponding path program 11 times [2018-10-22 15:50:53,114 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:53,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:53,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:53,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:53,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:53,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:53,373 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 [2018-10-22 15:50:53,382 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:53,415 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-22 15:50:53,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:53,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:53,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:53,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-22 15:50:53,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:50:53,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:50:53,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:50:53,471 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 15 states. [2018-10-22 15:50:53,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:53,561 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-22 15:50:53,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:50:53,562 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-22 15:50:53,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:53,565 INFO L225 Difference]: With dead ends: 49 [2018-10-22 15:50:53,565 INFO L226 Difference]: Without dead ends: 45 [2018-10-22 15:50:53,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:50:53,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-22 15:50:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-22 15:50:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-22 15:50:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-22 15:50:53,571 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-10-22 15:50:53,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:53,571 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-22 15:50:53,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:50:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-22 15:50:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-22 15:50:53,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:53,572 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:53,573 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:53,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:53,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1758028432, now seen corresponding path program 12 times [2018-10-22 15:50:53,573 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:53,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:53,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:53,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:53,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:53,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:53,813 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 [2018-10-22 15:50:53,824 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:53,854 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-22 15:50:53,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:53,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:53,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:53,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-22 15:50:53,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:50:53,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:50:53,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:50:53,925 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 16 states. [2018-10-22 15:50:54,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:54,037 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-22 15:50:54,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:50:54,037 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2018-10-22 15:50:54,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:54,038 INFO L225 Difference]: With dead ends: 52 [2018-10-22 15:50:54,038 INFO L226 Difference]: Without dead ends: 48 [2018-10-22 15:50:54,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:54,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-22 15:50:54,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-10-22 15:50:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-22 15:50:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-22 15:50:54,045 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-10-22 15:50:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:54,046 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-22 15:50:54,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:50:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-22 15:50:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-22 15:50:54,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:54,047 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:54,048 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:54,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:54,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1049601387, now seen corresponding path program 13 times [2018-10-22 15:50:54,048 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:54,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:54,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:54,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:54,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:54,365 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 [2018-10-22 15:50:54,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:54,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:54,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:54,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-22 15:50:54,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:50:54,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:50:54,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:54,507 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 17 states. [2018-10-22 15:50:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:54,581 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-22 15:50:54,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:50:54,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2018-10-22 15:50:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:54,583 INFO L225 Difference]: With dead ends: 55 [2018-10-22 15:50:54,583 INFO L226 Difference]: Without dead ends: 51 [2018-10-22 15:50:54,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:50:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-22 15:50:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-10-22 15:50:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-22 15:50:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-22 15:50:54,589 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-10-22 15:50:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:54,589 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-22 15:50:54,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:50:54,589 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-22 15:50:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-22 15:50:54,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:54,590 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:54,590 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:54,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:54,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1338550384, now seen corresponding path program 14 times [2018-10-22 15:50:54,591 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:54,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:54,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:54,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:54,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:54,984 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 [2018-10-22 15:50:54,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:55,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:55,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:55,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:55,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:55,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-22 15:50:55,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:50:55,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:50:55,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:50:55,185 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 18 states. [2018-10-22 15:50:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:55,268 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-22 15:50:55,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:50:55,269 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2018-10-22 15:50:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:55,270 INFO L225 Difference]: With dead ends: 58 [2018-10-22 15:50:55,270 INFO L226 Difference]: Without dead ends: 54 [2018-10-22 15:50:55,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=200, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:50:55,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-22 15:50:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-10-22 15:50:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-22 15:50:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-22 15:50:55,276 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-10-22 15:50:55,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:55,276 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-22 15:50:55,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:50:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-22 15:50:55,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-22 15:50:55,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:55,278 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:55,278 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:55,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:55,279 INFO L82 PathProgramCache]: Analyzing trace with hash -634702005, now seen corresponding path program 15 times [2018-10-22 15:50:55,279 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:55,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:55,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:55,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:55,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:55,553 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-22 15:50:55,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:55,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-22 15:50:55,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:55,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:55,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:55,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-22 15:50:55,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:50:55,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:50:55,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:50:55,674 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 19 states. [2018-10-22 15:50:55,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:55,729 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-22 15:50:55,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:50:55,730 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2018-10-22 15:50:55,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:55,731 INFO L225 Difference]: With dead ends: 61 [2018-10-22 15:50:55,731 INFO L226 Difference]: Without dead ends: 57 [2018-10-22 15:50:55,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=221, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:50:55,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-22 15:50:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-10-22 15:50:55,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-22 15:50:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-22 15:50:55,738 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-10-22 15:50:55,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:55,738 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-22 15:50:55,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:50:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-22 15:50:55,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-22 15:50:55,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:55,739 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:55,740 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:55,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:55,740 INFO L82 PathProgramCache]: Analyzing trace with hash -317982288, now seen corresponding path program 16 times [2018-10-22 15:50:55,740 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:55,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:55,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:55,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:56,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:56,307 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 [2018-10-22 15:50:56,315 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:56,349 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:56,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:56,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:56,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:56,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-22 15:50:56,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:50:56,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:50:56,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:50:56,460 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 20 states. [2018-10-22 15:50:56,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:56,678 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-22 15:50:56,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:50:56,679 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2018-10-22 15:50:56,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:56,679 INFO L225 Difference]: With dead ends: 64 [2018-10-22 15:50:56,679 INFO L226 Difference]: Without dead ends: 60 [2018-10-22 15:50:56,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=243, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:50:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-22 15:50:56,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-10-22 15:50:56,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-22 15:50:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-22 15:50:56,685 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-10-22 15:50:56,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:56,685 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-22 15:50:56,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:50:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-22 15:50:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-22 15:50:56,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:56,686 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:56,687 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:56,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:56,687 INFO L82 PathProgramCache]: Analyzing trace with hash -964042453, now seen corresponding path program 17 times [2018-10-22 15:50:56,687 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:56,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:56,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:56,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:56,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:57,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:57,132 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 [2018-10-22 15:50:57,139 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:57,252 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-22 15:50:57,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:57,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:57,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:57,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-22 15:50:57,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:50:57,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:50:57,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:50:57,412 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 21 states. [2018-10-22 15:50:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:57,518 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-22 15:50:57,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:50:57,519 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2018-10-22 15:50:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:57,520 INFO L225 Difference]: With dead ends: 67 [2018-10-22 15:50:57,520 INFO L226 Difference]: Without dead ends: 63 [2018-10-22 15:50:57,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=266, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:50:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-22 15:50:57,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-10-22 15:50:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 15:50:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-22 15:50:57,526 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-10-22 15:50:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:57,527 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-22 15:50:57,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:50:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-22 15:50:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-22 15:50:57,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:57,528 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:57,528 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:57,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1993964592, now seen corresponding path program 18 times [2018-10-22 15:50:57,529 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:57,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:57,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:57,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:57,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:57,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:57,906 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 [2018-10-22 15:50:57,914 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:57,957 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-22 15:50:57,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:57,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:58,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:58,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-22 15:50:58,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:50:58,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:50:58,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:50:58,123 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2018-10-22 15:50:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:58,213 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-22 15:50:58,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:50:58,214 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2018-10-22 15:50:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:58,214 INFO L225 Difference]: With dead ends: 70 [2018-10-22 15:50:58,214 INFO L226 Difference]: Without dead ends: 66 [2018-10-22 15:50:58,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=290, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:50:58,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-22 15:50:58,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-22 15:50:58,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-22 15:50:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-22 15:50:58,219 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-10-22 15:50:58,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:58,219 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-22 15:50:58,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:50:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-22 15:50:58,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-22 15:50:58,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:58,220 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:58,221 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:58,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:58,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1158044917, now seen corresponding path program 19 times [2018-10-22 15:50:58,221 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:58,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:58,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:58,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:58,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:58,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:58,549 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 [2018-10-22 15:50:58,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:58,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:58,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:58,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-22 15:50:58,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:50:58,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:50:58,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:50:58,918 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 23 states. [2018-10-22 15:50:59,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:59,159 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-22 15:50:59,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:50:59,159 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2018-10-22 15:50:59,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:59,160 INFO L225 Difference]: With dead ends: 73 [2018-10-22 15:50:59,160 INFO L226 Difference]: Without dead ends: 69 [2018-10-22 15:50:59,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=315, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:50:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-22 15:50:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-10-22 15:50:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-22 15:50:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-22 15:50:59,167 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-10-22 15:50:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:59,168 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-22 15:50:59,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:50:59,169 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-22 15:50:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-22 15:50:59,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:59,169 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:59,170 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:59,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:59,171 INFO L82 PathProgramCache]: Analyzing trace with hash -495389200, now seen corresponding path program 20 times [2018-10-22 15:50:59,171 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:59,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:59,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:59,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:59,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:59,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:59,645 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 [2018-10-22 15:50:59,655 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:59,693 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:59,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:59,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:59,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:59,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-22 15:50:59,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:50:59,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:50:59,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:50:59,754 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 24 states. [2018-10-22 15:50:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:59,833 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-22 15:50:59,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:50:59,836 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2018-10-22 15:50:59,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:59,837 INFO L225 Difference]: With dead ends: 76 [2018-10-22 15:50:59,838 INFO L226 Difference]: Without dead ends: 72 [2018-10-22 15:50:59,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:50:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-22 15:50:59,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-10-22 15:50:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-22 15:50:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-22 15:50:59,841 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-10-22 15:50:59,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:59,841 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-22 15:50:59,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:50:59,841 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-22 15:50:59,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-22 15:50:59,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:59,842 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:59,842 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:59,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:59,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1011383531, now seen corresponding path program 21 times [2018-10-22 15:50:59,843 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:59,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:59,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:59,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:59,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:00,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:00,302 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 [2018-10-22 15:51:00,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:00,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-22 15:51:00,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:00,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:00,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:00,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-22 15:51:00,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:51:00,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:51:00,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:51:00,436 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 25 states. [2018-10-22 15:51:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:00,527 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-22 15:51:00,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:51:00,527 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2018-10-22 15:51:00,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:00,528 INFO L225 Difference]: With dead ends: 79 [2018-10-22 15:51:00,528 INFO L226 Difference]: Without dead ends: 75 [2018-10-22 15:51:00,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:51:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-22 15:51:00,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-10-22 15:51:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-22 15:51:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-22 15:51:00,533 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-10-22 15:51:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:00,533 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-22 15:51:00,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:51:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-22 15:51:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-22 15:51:00,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:00,534 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:00,534 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:00,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:00,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1720365040, now seen corresponding path program 22 times [2018-10-22 15:51:00,535 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:00,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:00,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:00,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:00,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:01,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:01,150 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 [2018-10-22 15:51:01,158 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:01,206 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:01,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:01,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:01,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:01,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-22 15:51:01,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:51:01,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:51:01,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:51:01,360 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 26 states. [2018-10-22 15:51:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:01,819 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-22 15:51:01,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:51:01,819 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2018-10-22 15:51:01,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:01,821 INFO L225 Difference]: With dead ends: 82 [2018-10-22 15:51:01,821 INFO L226 Difference]: Without dead ends: 78 [2018-10-22 15:51:01,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:51:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-22 15:51:01,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-10-22 15:51:01,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-22 15:51:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-22 15:51:01,825 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-10-22 15:51:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:01,826 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-22 15:51:01,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:51:01,826 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-22 15:51:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-22 15:51:01,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:01,827 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:01,827 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:01,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:01,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2093248203, now seen corresponding path program 23 times [2018-10-22 15:51:01,827 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:01,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:01,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:01,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:01,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:02,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:02,419 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 [2018-10-22 15:51:02,427 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:02,492 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-22 15:51:02,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:02,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:02,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:02,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-22 15:51:02,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:51:02,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:51:02,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:51:02,586 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 27 states. [2018-10-22 15:51:02,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:02,762 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-22 15:51:02,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:51:02,762 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 76 [2018-10-22 15:51:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:02,763 INFO L225 Difference]: With dead ends: 85 [2018-10-22 15:51:02,764 INFO L226 Difference]: Without dead ends: 81 [2018-10-22 15:51:02,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:51:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-22 15:51:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-10-22 15:51:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 15:51:02,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-22 15:51:02,768 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-10-22 15:51:02,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:02,769 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-22 15:51:02,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:51:02,769 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-22 15:51:02,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-22 15:51:02,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:02,770 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:02,770 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:02,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:02,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1324510672, now seen corresponding path program 24 times [2018-10-22 15:51:02,770 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:02,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:02,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:02,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:02,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:04,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:04,210 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 [2018-10-22 15:51:04,218 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:04,278 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-22 15:51:04,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:04,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:04,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:04,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-22 15:51:04,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:51:04,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:51:04,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:51:04,393 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 28 states. [2018-10-22 15:51:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:04,448 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-22 15:51:04,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:51:04,449 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2018-10-22 15:51:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:04,450 INFO L225 Difference]: With dead ends: 88 [2018-10-22 15:51:04,450 INFO L226 Difference]: Without dead ends: 84 [2018-10-22 15:51:04,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=357, Invalid=455, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:51:04,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-22 15:51:04,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-10-22 15:51:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-22 15:51:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-22 15:51:04,454 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-10-22 15:51:04,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:04,455 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-22 15:51:04,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:51:04,455 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-22 15:51:04,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-22 15:51:04,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:04,455 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:04,456 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:04,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:04,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1010530475, now seen corresponding path program 25 times [2018-10-22 15:51:04,456 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:04,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:04,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:04,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:04,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:06,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:06,729 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 [2018-10-22 15:51:06,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:06,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:06,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:06,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-22 15:51:06,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:51:06,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:51:06,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:51:06,859 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 29 states. [2018-10-22 15:51:06,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:06,927 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-22 15:51:06,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:51:06,928 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 82 [2018-10-22 15:51:06,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:06,929 INFO L225 Difference]: With dead ends: 91 [2018-10-22 15:51:06,929 INFO L226 Difference]: Without dead ends: 87 [2018-10-22 15:51:06,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=384, Invalid=486, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:51:06,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-22 15:51:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-10-22 15:51:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-22 15:51:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-22 15:51:06,934 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2018-10-22 15:51:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:06,934 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-22 15:51:06,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:51:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-22 15:51:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-22 15:51:06,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:06,935 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:06,935 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:06,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:06,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1363952560, now seen corresponding path program 26 times [2018-10-22 15:51:06,936 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:06,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:06,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:06,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:07,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:07,936 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 [2018-10-22 15:51:07,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:07,996 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:07,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:07,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:08,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:08,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-22 15:51:08,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:51:08,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:51:08,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:51:08,140 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 30 states. [2018-10-22 15:51:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:08,265 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-22 15:51:08,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:51:08,266 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2018-10-22 15:51:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:08,266 INFO L225 Difference]: With dead ends: 94 [2018-10-22 15:51:08,267 INFO L226 Difference]: Without dead ends: 90 [2018-10-22 15:51:08,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=412, Invalid=518, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:51:08,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-22 15:51:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-22 15:51:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:51:08,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-22 15:51:08,269 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2018-10-22 15:51:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:08,270 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-22 15:51:08,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:51:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-22 15:51:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-22 15:51:08,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:08,271 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:08,271 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:08,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:08,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1476683125, now seen corresponding path program 27 times [2018-10-22 15:51:08,272 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:08,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:08,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:08,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:09,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:09,553 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-22 15:51:09,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:09,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-22 15:51:09,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:09,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:09,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:09,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-22 15:51:09,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:51:09,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:51:09,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:51:09,679 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 31 states. [2018-10-22 15:51:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:09,776 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-22 15:51:09,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:51:09,777 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 88 [2018-10-22 15:51:09,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:09,778 INFO L225 Difference]: With dead ends: 97 [2018-10-22 15:51:09,778 INFO L226 Difference]: Without dead ends: 93 [2018-10-22 15:51:09,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=441, Invalid=551, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:51:09,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-22 15:51:09,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2018-10-22 15:51:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-22 15:51:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-22 15:51:09,783 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 88 [2018-10-22 15:51:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:09,783 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-22 15:51:09,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:51:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-22 15:51:09,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-22 15:51:09,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:09,784 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:09,784 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:09,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:09,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1168519568, now seen corresponding path program 28 times [2018-10-22 15:51:09,785 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:09,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:09,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:09,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:09,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:10,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:10,294 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 [2018-10-22 15:51:10,303 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:10,350 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:10,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:10,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:10,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:10,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-22 15:51:10,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:51:10,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:51:10,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:51:10,455 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 32 states. [2018-10-22 15:51:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:10,521 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-22 15:51:10,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:51:10,522 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2018-10-22 15:51:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:10,523 INFO L225 Difference]: With dead ends: 100 [2018-10-22 15:51:10,523 INFO L226 Difference]: Without dead ends: 96 [2018-10-22 15:51:10,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=471, Invalid=585, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:51:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-22 15:51:10,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2018-10-22 15:51:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-22 15:51:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-22 15:51:10,528 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 91 [2018-10-22 15:51:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:10,528 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-22 15:51:10,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:51:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-22 15:51:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-22 15:51:10,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:10,529 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:10,529 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:10,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:10,530 INFO L82 PathProgramCache]: Analyzing trace with hash 986895467, now seen corresponding path program 29 times [2018-10-22 15:51:10,530 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:10,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:10,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:10,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:10,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:11,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:11,138 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 [2018-10-22 15:51:11,145 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:11,228 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-22 15:51:11,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:11,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:11,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:11,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-22 15:51:11,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:51:11,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:51:11,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:51:11,306 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 33 states. [2018-10-22 15:51:11,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:11,537 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-22 15:51:11,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-22 15:51:11,537 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 94 [2018-10-22 15:51:11,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:11,539 INFO L225 Difference]: With dead ends: 103 [2018-10-22 15:51:11,539 INFO L226 Difference]: Without dead ends: 99 [2018-10-22 15:51:11,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=502, Invalid=620, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:51:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-22 15:51:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-10-22 15:51:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:51:11,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-22 15:51:11,544 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 94 [2018-10-22 15:51:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:11,544 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-22 15:51:11,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:51:11,544 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-22 15:51:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-22 15:51:11,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:11,545 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:11,545 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:11,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:11,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1099839344, now seen corresponding path program 30 times [2018-10-22 15:51:11,546 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:11,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:11,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:11,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:11,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:12,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:12,978 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 [2018-10-22 15:51:12,985 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:13,060 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-22 15:51:13,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:13,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:13,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:13,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-22 15:51:13,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:51:13,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:51:13,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:51:13,198 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 34 states. [2018-10-22 15:51:13,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:13,295 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-22 15:51:13,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:51:13,296 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2018-10-22 15:51:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:13,297 INFO L225 Difference]: With dead ends: 106 [2018-10-22 15:51:13,297 INFO L226 Difference]: Without dead ends: 102 [2018-10-22 15:51:13,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=534, Invalid=656, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:51:13,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-22 15:51:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2018-10-22 15:51:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-22 15:51:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-22 15:51:13,302 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 97 [2018-10-22 15:51:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:13,302 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-22 15:51:13,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:51:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-22 15:51:13,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-22 15:51:13,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:13,303 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:13,303 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:13,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:13,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1659951541, now seen corresponding path program 31 times [2018-10-22 15:51:13,304 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:13,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:13,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:13,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:13,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:13,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:13,873 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-22 15:51:13,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:13,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:14,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:14,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-22 15:51:14,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:51:14,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:51:14,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:51:14,005 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 35 states. [2018-10-22 15:51:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:14,138 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-22 15:51:14,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:51:14,138 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2018-10-22 15:51:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:14,139 INFO L225 Difference]: With dead ends: 109 [2018-10-22 15:51:14,139 INFO L226 Difference]: Without dead ends: 105 [2018-10-22 15:51:14,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=567, Invalid=693, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:51:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-22 15:51:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2018-10-22 15:51:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-22 15:51:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-22 15:51:14,144 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 100 [2018-10-22 15:51:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:14,144 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-22 15:51:14,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:51:14,145 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-22 15:51:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-22 15:51:14,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:14,145 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:14,146 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:14,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:14,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2014467408, now seen corresponding path program 32 times [2018-10-22 15:51:14,146 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:14,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:14,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:14,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:14,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:14,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:14,965 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 [2018-10-22 15:51:14,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:15,027 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:15,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:15,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:15,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:15,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-22 15:51:15,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:51:15,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:51:15,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:51:15,117 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 36 states. [2018-10-22 15:51:15,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:15,199 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-22 15:51:15,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-22 15:51:15,200 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2018-10-22 15:51:15,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:15,201 INFO L225 Difference]: With dead ends: 112 [2018-10-22 15:51:15,202 INFO L226 Difference]: Without dead ends: 108 [2018-10-22 15:51:15,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=601, Invalid=731, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:51:15,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-22 15:51:15,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2018-10-22 15:51:15,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:51:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-22 15:51:15,206 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 103 [2018-10-22 15:51:15,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:15,207 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-22 15:51:15,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:51:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-22 15:51:15,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-22 15:51:15,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:15,208 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:15,208 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:15,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:15,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2072080341, now seen corresponding path program 33 times [2018-10-22 15:51:15,208 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:15,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:15,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:15,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:15,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:15,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:15,915 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 [2018-10-22 15:51:15,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:15,995 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-22 15:51:15,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:15,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:16,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:16,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-22 15:51:16,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:51:16,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:51:16,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:51:16,128 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 37 states. [2018-10-22 15:51:16,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:16,231 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-22 15:51:16,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:51:16,231 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 106 [2018-10-22 15:51:16,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:16,232 INFO L225 Difference]: With dead ends: 115 [2018-10-22 15:51:16,232 INFO L226 Difference]: Without dead ends: 111 [2018-10-22 15:51:16,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=636, Invalid=770, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:51:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-22 15:51:16,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-10-22 15:51:16,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-22 15:51:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-22 15:51:16,237 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 106 [2018-10-22 15:51:16,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:16,237 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-22 15:51:16,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:51:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-22 15:51:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-22 15:51:16,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:16,238 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:16,238 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:16,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:16,238 INFO L82 PathProgramCache]: Analyzing trace with hash -432048944, now seen corresponding path program 34 times [2018-10-22 15:51:16,239 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:16,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:16,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:16,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:16,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:16,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:16,903 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 [2018-10-22 15:51:16,911 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:16,972 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:16,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:16,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:17,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:17,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-22 15:51:17,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:51:17,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:51:17,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:51:17,074 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 38 states. [2018-10-22 15:51:17,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:17,168 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-10-22 15:51:17,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:51:17,169 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 109 [2018-10-22 15:51:17,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:17,170 INFO L225 Difference]: With dead ends: 118 [2018-10-22 15:51:17,170 INFO L226 Difference]: Without dead ends: 114 [2018-10-22 15:51:17,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=672, Invalid=810, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:51:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-22 15:51:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-10-22 15:51:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-22 15:51:17,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-22 15:51:17,175 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 109 [2018-10-22 15:51:17,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:17,175 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-22 15:51:17,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:51:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-22 15:51:17,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-22 15:51:17,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:17,176 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:17,176 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:17,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:17,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1804660213, now seen corresponding path program 35 times [2018-10-22 15:51:17,176 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:17,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:17,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:17,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:17,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:18,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:18,531 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 [2018-10-22 15:51:18,539 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:18,620 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-22 15:51:18,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:18,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:18,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:18,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-22 15:51:18,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:51:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:51:18,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:51:18,703 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 39 states. [2018-10-22 15:51:18,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:18,811 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-22 15:51:18,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:51:18,812 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 112 [2018-10-22 15:51:18,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:18,813 INFO L225 Difference]: With dead ends: 121 [2018-10-22 15:51:18,813 INFO L226 Difference]: Without dead ends: 117 [2018-10-22 15:51:18,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=709, Invalid=851, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:51:18,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-22 15:51:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2018-10-22 15:51:18,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:51:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-22 15:51:18,817 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 112 [2018-10-22 15:51:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:18,817 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-22 15:51:18,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:51:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-22 15:51:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-22 15:51:18,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:18,818 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:18,818 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:18,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:18,819 INFO L82 PathProgramCache]: Analyzing trace with hash -883349776, now seen corresponding path program 36 times [2018-10-22 15:51:18,819 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:18,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:18,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:18,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:18,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:19,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:19,600 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 [2018-10-22 15:51:19,608 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:19,691 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-22 15:51:19,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:19,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:19,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:19,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-22 15:51:19,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:51:19,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:51:19,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:51:19,771 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 40 states. [2018-10-22 15:51:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:19,858 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-10-22 15:51:19,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 15:51:19,858 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2018-10-22 15:51:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:19,859 INFO L225 Difference]: With dead ends: 124 [2018-10-22 15:51:19,860 INFO L226 Difference]: Without dead ends: 120 [2018-10-22 15:51:19,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=747, Invalid=893, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:51:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-22 15:51:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2018-10-22 15:51:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-22 15:51:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-22 15:51:19,865 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 115 [2018-10-22 15:51:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:19,865 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-22 15:51:19,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:51:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-22 15:51:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-22 15:51:19,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:19,866 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:19,866 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:19,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:19,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1034857451, now seen corresponding path program 37 times [2018-10-22 15:51:19,867 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:19,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:19,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:19,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:19,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:21,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:21,056 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 [2018-10-22 15:51:21,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:21,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:21,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:21,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-22 15:51:21,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:51:21,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:51:21,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:51:21,667 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 41 states. [2018-10-22 15:51:22,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:22,333 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-22 15:51:22,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:51:22,334 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 118 [2018-10-22 15:51:22,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:22,335 INFO L225 Difference]: With dead ends: 127 [2018-10-22 15:51:22,335 INFO L226 Difference]: Without dead ends: 123 [2018-10-22 15:51:22,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=786, Invalid=936, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:51:22,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-22 15:51:22,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-10-22 15:51:22,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-22 15:51:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-22 15:51:22,340 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 118 [2018-10-22 15:51:22,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:22,340 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-22 15:51:22,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:51:22,340 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-22 15:51:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-22 15:51:22,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:22,341 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:22,341 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:22,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:22,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1806483728, now seen corresponding path program 38 times [2018-10-22 15:51:22,342 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:22,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:22,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:22,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:22,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:23,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:23,755 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 [2018-10-22 15:51:23,763 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:23,837 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:23,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:23,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:23,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:23,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-22 15:51:23,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:51:23,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:51:23,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:51:23,973 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 42 states. [2018-10-22 15:51:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:24,083 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-10-22 15:51:24,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:51:24,084 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 121 [2018-10-22 15:51:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:24,085 INFO L225 Difference]: With dead ends: 130 [2018-10-22 15:51:24,085 INFO L226 Difference]: Without dead ends: 126 [2018-10-22 15:51:24,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=826, Invalid=980, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:51:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-22 15:51:24,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2018-10-22 15:51:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-22 15:51:24,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-22 15:51:24,089 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 121 [2018-10-22 15:51:24,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:24,090 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-22 15:51:24,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:51:24,090 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-22 15:51:24,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-22 15:51:24,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:24,091 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:24,091 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:24,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:24,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1635033653, now seen corresponding path program 39 times [2018-10-22 15:51:24,092 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:24,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:24,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:24,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:24,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:24,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:24,887 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 [2018-10-22 15:51:24,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:24,995 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-22 15:51:24,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:24,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:25,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:25,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-22 15:51:25,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:51:25,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:51:25,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:51:25,607 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 43 states. [2018-10-22 15:51:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:26,296 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-22 15:51:26,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:51:26,297 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 124 [2018-10-22 15:51:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:26,298 INFO L225 Difference]: With dead ends: 133 [2018-10-22 15:51:26,298 INFO L226 Difference]: Without dead ends: 129 [2018-10-22 15:51:26,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=867, Invalid=1025, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:51:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-22 15:51:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2018-10-22 15:51:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-22 15:51:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-22 15:51:26,303 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 124 [2018-10-22 15:51:26,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:26,303 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-22 15:51:26,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:51:26,303 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-22 15:51:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-22 15:51:26,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:26,304 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:26,305 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:26,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:26,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1579959088, now seen corresponding path program 40 times [2018-10-22 15:51:26,305 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:26,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:26,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:26,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:26,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:28,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:28,789 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 [2018-10-22 15:51:28,799 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:28,872 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:28,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:28,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:28,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:28,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-22 15:51:28,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:51:28,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:51:28,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:51:28,981 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 44 states. [2018-10-22 15:51:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:29,183 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-10-22 15:51:29,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:51:29,183 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 127 [2018-10-22 15:51:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:29,185 INFO L225 Difference]: With dead ends: 136 [2018-10-22 15:51:29,185 INFO L226 Difference]: Without dead ends: 132 [2018-10-22 15:51:29,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=909, Invalid=1071, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:51:29,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-22 15:51:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2018-10-22 15:51:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-22 15:51:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-22 15:51:29,190 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 127 [2018-10-22 15:51:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:29,191 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-22 15:51:29,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:51:29,191 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-22 15:51:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-22 15:51:29,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:29,192 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:29,192 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:29,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:29,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1658005419, now seen corresponding path program 41 times [2018-10-22 15:51:29,192 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:29,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:29,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:29,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:29,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:30,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:30,134 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 [2018-10-22 15:51:30,142 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:30,397 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-22 15:51:30,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:30,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:30,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:30,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-22 15:51:30,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:51:30,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:51:30,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:51:30,525 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 45 states. [2018-10-22 15:51:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:30,653 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-22 15:51:30,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-22 15:51:30,653 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2018-10-22 15:51:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:30,654 INFO L225 Difference]: With dead ends: 139 [2018-10-22 15:51:30,654 INFO L226 Difference]: Without dead ends: 135 [2018-10-22 15:51:30,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=952, Invalid=1118, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:51:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-22 15:51:30,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2018-10-22 15:51:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-22 15:51:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-22 15:51:30,659 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 130 [2018-10-22 15:51:30,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:30,659 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-22 15:51:30,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:51:30,659 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-22 15:51:30,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-22 15:51:30,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:30,660 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:30,660 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:30,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:30,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1136022192, now seen corresponding path program 42 times [2018-10-22 15:51:30,661 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:30,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:30,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:30,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:30,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:32,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:32,174 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 [2018-10-22 15:51:32,194 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:32,293 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-22 15:51:32,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:32,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:32,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:32,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-22 15:51:32,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:51:32,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:51:32,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:51:32,380 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 46 states. [2018-10-22 15:51:32,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:32,469 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-22 15:51:32,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-22 15:51:32,470 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 133 [2018-10-22 15:51:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:32,471 INFO L225 Difference]: With dead ends: 142 [2018-10-22 15:51:32,471 INFO L226 Difference]: Without dead ends: 138 [2018-10-22 15:51:32,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=996, Invalid=1166, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:51:32,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-22 15:51:32,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-10-22 15:51:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-22 15:51:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-22 15:51:32,477 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 133 [2018-10-22 15:51:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:32,477 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-22 15:51:32,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:51:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-22 15:51:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-22 15:51:32,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:32,478 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:32,478 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:32,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:32,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1546385013, now seen corresponding path program 43 times [2018-10-22 15:51:32,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:32,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:32,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:32,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:32,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:34,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:34,097 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 [2018-10-22 15:51:34,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:34,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:34,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:34,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-22 15:51:34,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:51:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:51:34,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:51:34,287 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 47 states. [2018-10-22 15:51:35,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:35,188 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-22 15:51:35,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:51:35,188 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 136 [2018-10-22 15:51:35,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:35,189 INFO L225 Difference]: With dead ends: 145 [2018-10-22 15:51:35,189 INFO L226 Difference]: Without dead ends: 141 [2018-10-22 15:51:35,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1041, Invalid=1215, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:51:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-22 15:51:35,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2018-10-22 15:51:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-22 15:51:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-22 15:51:35,193 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 136 [2018-10-22 15:51:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:35,193 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-22 15:51:35,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:51:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-22 15:51:35,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-22 15:51:35,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:35,195 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:35,195 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:35,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:35,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1106706288, now seen corresponding path program 44 times [2018-10-22 15:51:35,195 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:35,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:35,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:35,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:35,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:36,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:36,180 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 [2018-10-22 15:51:36,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:36,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:36,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:36,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:36,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:36,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-22 15:51:36,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-22 15:51:36,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-22 15:51:36,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:51:36,460 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 48 states. [2018-10-22 15:51:36,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:36,560 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-10-22 15:51:36,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-22 15:51:36,560 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 139 [2018-10-22 15:51:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:36,561 INFO L225 Difference]: With dead ends: 148 [2018-10-22 15:51:36,561 INFO L226 Difference]: Without dead ends: 144 [2018-10-22 15:51:36,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1087, Invalid=1265, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:51:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-22 15:51:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2018-10-22 15:51:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-22 15:51:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-22 15:51:36,565 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 139 [2018-10-22 15:51:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:36,565 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-22 15:51:36,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-22 15:51:36,565 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-22 15:51:36,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-22 15:51:36,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:36,566 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:36,566 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:36,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:36,566 INFO L82 PathProgramCache]: Analyzing trace with hash -933493909, now seen corresponding path program 45 times [2018-10-22 15:51:36,566 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:36,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:36,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:36,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:36,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:38,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:38,118 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 [2018-10-22 15:51:38,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:38,249 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-22 15:51:38,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:38,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:38,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:38,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-22 15:51:38,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-22 15:51:38,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-22 15:51:38,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:51:38,397 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 49 states. [2018-10-22 15:51:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:38,611 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-22 15:51:38,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-22 15:51:38,611 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 142 [2018-10-22 15:51:38,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:38,612 INFO L225 Difference]: With dead ends: 151 [2018-10-22 15:51:38,612 INFO L226 Difference]: Without dead ends: 147 [2018-10-22 15:51:38,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1316, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:51:38,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-22 15:51:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2018-10-22 15:51:38,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-22 15:51:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-22 15:51:38,617 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 142 [2018-10-22 15:51:38,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:38,617 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-22 15:51:38,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-22 15:51:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-22 15:51:38,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-22 15:51:38,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:38,619 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:38,619 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:38,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:38,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1839610256, now seen corresponding path program 46 times [2018-10-22 15:51:38,619 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:38,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:38,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:38,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:38,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:40,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:40,017 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 [2018-10-22 15:51:40,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:40,099 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:40,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:40,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:40,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:40,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-22 15:51:40,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-22 15:51:40,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-22 15:51:40,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:51:40,321 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 50 states. [2018-10-22 15:51:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:40,609 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-10-22 15:51:40,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:51:40,609 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 145 [2018-10-22 15:51:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:40,610 INFO L225 Difference]: With dead ends: 154 [2018-10-22 15:51:40,611 INFO L226 Difference]: Without dead ends: 150 [2018-10-22 15:51:40,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1182, Invalid=1368, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:51:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-22 15:51:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2018-10-22 15:51:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-22 15:51:40,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-22 15:51:40,615 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 145 [2018-10-22 15:51:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:40,616 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-22 15:51:40,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-22 15:51:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-22 15:51:40,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-22 15:51:40,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:40,617 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:40,617 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:40,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:40,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1689851211, now seen corresponding path program 47 times [2018-10-22 15:51:40,617 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:40,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:40,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:40,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:40,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:41,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:41,722 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 [2018-10-22 15:51:41,731 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:41,837 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-22 15:51:41,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:41,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:42,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:42,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-22 15:51:42,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-22 15:51:42,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-22 15:51:42,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:51:42,096 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 51 states. [2018-10-22 15:51:42,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:42,212 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-22 15:51:42,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-22 15:51:42,212 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 148 [2018-10-22 15:51:42,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:42,213 INFO L225 Difference]: With dead ends: 157 [2018-10-22 15:51:42,213 INFO L226 Difference]: Without dead ends: 153 [2018-10-22 15:51:42,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1231, Invalid=1421, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:51:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-22 15:51:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2018-10-22 15:51:42,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-22 15:51:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-22 15:51:42,217 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 148 [2018-10-22 15:51:42,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:42,217 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-22 15:51:42,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-22 15:51:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-22 15:51:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-22 15:51:42,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:42,218 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:42,218 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:42,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:42,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1605805136, now seen corresponding path program 48 times [2018-10-22 15:51:42,219 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:42,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:42,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:42,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:42,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:43,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:43,329 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 [2018-10-22 15:51:43,335 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:43,462 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-22 15:51:43,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:43,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:43,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:43,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-22 15:51:43,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-22 15:51:43,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-22 15:51:43,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:51:43,549 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 52 states. [2018-10-22 15:51:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:43,793 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-10-22 15:51:43,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-22 15:51:43,793 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 151 [2018-10-22 15:51:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:43,794 INFO L225 Difference]: With dead ends: 160 [2018-10-22 15:51:43,794 INFO L226 Difference]: Without dead ends: 156 [2018-10-22 15:51:43,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1281, Invalid=1475, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:51:43,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-22 15:51:43,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2018-10-22 15:51:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-22 15:51:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-22 15:51:43,797 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 151 [2018-10-22 15:51:43,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:43,798 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-22 15:51:43,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-22 15:51:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-22 15:51:43,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-22 15:51:43,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:43,798 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:43,799 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:43,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:43,799 INFO L82 PathProgramCache]: Analyzing trace with hash 448347947, now seen corresponding path program 49 times [2018-10-22 15:51:43,799 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:43,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:43,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:43,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:43,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:44,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:44,876 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 [2018-10-22 15:51:44,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:44,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:45,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:45,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-22 15:51:45,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-22 15:51:45,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-22 15:51:45,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:51:45,257 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 53 states. [2018-10-22 15:51:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:45,351 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-22 15:51:45,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-22 15:51:45,352 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 154 [2018-10-22 15:51:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:45,353 INFO L225 Difference]: With dead ends: 163 [2018-10-22 15:51:45,353 INFO L226 Difference]: Without dead ends: 159 [2018-10-22 15:51:45,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1332, Invalid=1530, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:51:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-22 15:51:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2018-10-22 15:51:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-22 15:51:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-22 15:51:45,358 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 154 [2018-10-22 15:51:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:45,359 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-22 15:51:45,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-22 15:51:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-22 15:51:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-22 15:51:45,360 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:45,360 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:45,360 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:45,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:45,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1028810192, now seen corresponding path program 50 times [2018-10-22 15:51:45,361 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:45,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:45,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:45,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:45,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:46,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:46,481 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 [2018-10-22 15:51:46,488 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:46,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:46,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:46,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:46,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:46,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-22 15:51:46,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-22 15:51:46,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-22 15:51:46,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:51:46,729 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 54 states. [2018-10-22 15:51:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:46,863 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-10-22 15:51:46,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-22 15:51:46,863 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 157 [2018-10-22 15:51:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:46,864 INFO L225 Difference]: With dead ends: 166 [2018-10-22 15:51:46,864 INFO L226 Difference]: Without dead ends: 162 [2018-10-22 15:51:46,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1384, Invalid=1586, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:51:46,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-22 15:51:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-10-22 15:51:46,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-22 15:51:46,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-22 15:51:46,868 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 157 [2018-10-22 15:51:46,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:46,869 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-22 15:51:46,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-22 15:51:46,869 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-22 15:51:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-22 15:51:46,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:46,870 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:46,870 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:46,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:46,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2041217291, now seen corresponding path program 51 times [2018-10-22 15:51:46,870 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:46,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:46,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:46,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:46,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:47,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:47,939 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 [2018-10-22 15:51:47,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:48,207 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-22 15:51:48,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:48,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:48,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:48,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-22 15:51:48,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-22 15:51:48,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-22 15:51:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:51:48,524 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 55 states. [2018-10-22 15:51:48,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:48,811 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-22 15:51:48,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-22 15:51:48,812 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 160 [2018-10-22 15:51:48,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:48,813 INFO L225 Difference]: With dead ends: 169 [2018-10-22 15:51:48,814 INFO L226 Difference]: Without dead ends: 165 [2018-10-22 15:51:48,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1437, Invalid=1643, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 15:51:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-22 15:51:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2018-10-22 15:51:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-22 15:51:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-22 15:51:48,819 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 160 [2018-10-22 15:51:48,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:48,820 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-22 15:51:48,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-22 15:51:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-22 15:51:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-22 15:51:48,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:48,821 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:48,821 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:48,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:48,821 INFO L82 PathProgramCache]: Analyzing trace with hash -894216208, now seen corresponding path program 52 times [2018-10-22 15:51:48,821 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:48,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:48,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:48,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:48,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:50,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:50,108 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 [2018-10-22 15:51:50,116 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:50,196 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:50,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:50,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:50,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:50,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-22 15:51:50,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-22 15:51:50,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-22 15:51:50,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 15:51:50,296 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 56 states. [2018-10-22 15:51:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:50,438 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-10-22 15:51:50,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-22 15:51:50,438 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 163 [2018-10-22 15:51:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:50,439 INFO L225 Difference]: With dead ends: 172 [2018-10-22 15:51:50,439 INFO L226 Difference]: Without dead ends: 168 [2018-10-22 15:51:50,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1491, Invalid=1701, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:51:50,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-22 15:51:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2018-10-22 15:51:50,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-22 15:51:50,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-22 15:51:50,441 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 163 [2018-10-22 15:51:50,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:50,442 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-22 15:51:50,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-22 15:51:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-22 15:51:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-22 15:51:50,442 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:50,443 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 53, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:50,443 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:50,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:50,443 INFO L82 PathProgramCache]: Analyzing trace with hash -564471061, now seen corresponding path program 53 times [2018-10-22 15:51:50,443 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:50,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:50,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:50,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:50,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:51,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:51,699 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 [2018-10-22 15:51:51,706 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:51,827 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-22 15:51:51,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:51,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:52,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:52,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-22 15:51:52,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-22 15:51:52,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-22 15:51:52,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:51:52,572 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 57 states. [2018-10-22 15:51:53,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:53,234 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-22 15:51:53,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-22 15:51:53,234 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 166 [2018-10-22 15:51:53,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:53,235 INFO L225 Difference]: With dead ends: 175 [2018-10-22 15:51:53,235 INFO L226 Difference]: Without dead ends: 171 [2018-10-22 15:51:53,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1546, Invalid=1760, Unknown=0, NotChecked=0, Total=3306 [2018-10-22 15:51:53,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-22 15:51:53,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2018-10-22 15:51:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-22 15:51:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-10-22 15:51:53,239 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 166 [2018-10-22 15:51:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:53,239 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-10-22 15:51:53,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-22 15:51:53,239 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-10-22 15:51:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-22 15:51:53,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:53,240 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 54, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:53,240 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:53,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash 282997264, now seen corresponding path program 54 times [2018-10-22 15:51:53,241 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:53,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:53,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:53,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:53,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:54,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:54,711 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 [2018-10-22 15:51:54,719 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:54,843 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-22 15:51:54,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:54,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:54,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:54,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-22 15:51:54,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-22 15:51:54,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-22 15:51:54,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2018-10-22 15:51:54,939 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 58 states. [2018-10-22 15:51:55,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:55,045 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-10-22 15:51:55,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-22 15:51:55,046 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 169 [2018-10-22 15:51:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:55,047 INFO L225 Difference]: With dead ends: 178 [2018-10-22 15:51:55,047 INFO L226 Difference]: Without dead ends: 174 [2018-10-22 15:51:55,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1602, Invalid=1820, Unknown=0, NotChecked=0, Total=3422 [2018-10-22 15:51:55,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-22 15:51:55,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2018-10-22 15:51:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-22 15:51:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-22 15:51:55,051 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 169 [2018-10-22 15:51:55,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:55,052 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-22 15:51:55,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-22 15:51:55,052 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-22 15:51:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-22 15:51:55,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:55,053 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:55,053 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:55,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:55,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1394101451, now seen corresponding path program 55 times [2018-10-22 15:51:55,054 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:55,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:55,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:55,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:55,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:56,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:56,450 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 [2018-10-22 15:51:56,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:56,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:56,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:56,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-22 15:51:56,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-22 15:51:56,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-22 15:51:56,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2018-10-22 15:51:56,874 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 59 states. [2018-10-22 15:51:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:56,987 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-22 15:51:56,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-22 15:51:56,988 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 172 [2018-10-22 15:51:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:56,989 INFO L225 Difference]: With dead ends: 181 [2018-10-22 15:51:56,989 INFO L226 Difference]: Without dead ends: 177 [2018-10-22 15:51:56,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1659, Invalid=1881, Unknown=0, NotChecked=0, Total=3540 [2018-10-22 15:51:56,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-22 15:51:56,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2018-10-22 15:51:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-22 15:51:56,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-10-22 15:51:56,993 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 172 [2018-10-22 15:51:56,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:56,993 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-10-22 15:51:56,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-22 15:51:56,993 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-10-22 15:51:56,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-22 15:51:56,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:56,994 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 56, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:56,994 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:56,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:56,994 INFO L82 PathProgramCache]: Analyzing trace with hash 985986096, now seen corresponding path program 56 times [2018-10-22 15:51:56,994 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:56,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:56,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:56,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:56,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:58,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:58,287 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 [2018-10-22 15:51:58,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:58,381 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:58,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:58,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:58,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:58,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-22 15:51:58,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-22 15:51:58,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-22 15:51:58,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2018-10-22 15:51:58,743 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 60 states. [2018-10-22 15:51:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:58,946 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2018-10-22 15:51:58,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-22 15:51:58,946 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 175 [2018-10-22 15:51:58,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:58,947 INFO L225 Difference]: With dead ends: 184 [2018-10-22 15:51:58,947 INFO L226 Difference]: Without dead ends: 180 [2018-10-22 15:51:58,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1717, Invalid=1943, Unknown=0, NotChecked=0, Total=3660 [2018-10-22 15:51:58,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-22 15:51:58,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2018-10-22 15:51:58,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-22 15:51:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-22 15:51:58,950 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 175 [2018-10-22 15:51:58,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:58,951 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-22 15:51:58,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-22 15:51:58,951 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-22 15:51:58,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-22 15:51:58,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:58,951 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 57, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:58,952 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:58,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:58,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1873860267, now seen corresponding path program 57 times [2018-10-22 15:51:58,952 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:58,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:58,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:58,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:58,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:00,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:00,503 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 [2018-10-22 15:52:00,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:00,648 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-22 15:52:00,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:00,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:00,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:00,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-22 15:52:00,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-22 15:52:00,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-22 15:52:00,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2018-10-22 15:52:00,735 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 61 states. [2018-10-22 15:52:00,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:00,892 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-22 15:52:00,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-22 15:52:00,892 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 178 [2018-10-22 15:52:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:00,893 INFO L225 Difference]: With dead ends: 187 [2018-10-22 15:52:00,894 INFO L226 Difference]: Without dead ends: 183 [2018-10-22 15:52:00,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1776, Invalid=2006, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:52:00,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-22 15:52:00,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2018-10-22 15:52:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-22 15:52:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-10-22 15:52:00,897 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 178 [2018-10-22 15:52:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:00,897 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-10-22 15:52:00,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-22 15:52:00,898 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-10-22 15:52:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-22 15:52:00,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:00,899 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:00,899 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:00,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:00,899 INFO L82 PathProgramCache]: Analyzing trace with hash -170287536, now seen corresponding path program 58 times [2018-10-22 15:52:00,899 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:00,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:00,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:00,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:00,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:02,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:02,281 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 [2018-10-22 15:52:02,288 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:02,388 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:02,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:02,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:02,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:02,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-22 15:52:02,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-22 15:52:02,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-22 15:52:02,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:52:02,504 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 62 states. [2018-10-22 15:52:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:02,644 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-10-22 15:52:02,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-22 15:52:02,644 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 181 [2018-10-22 15:52:02,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:02,646 INFO L225 Difference]: With dead ends: 190 [2018-10-22 15:52:02,646 INFO L226 Difference]: Without dead ends: 186 [2018-10-22 15:52:02,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1836, Invalid=2070, Unknown=0, NotChecked=0, Total=3906 [2018-10-22 15:52:02,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-22 15:52:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-10-22 15:52:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-22 15:52:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-22 15:52:02,651 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 181 [2018-10-22 15:52:02,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:02,651 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-22 15:52:02,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-22 15:52:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-22 15:52:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-22 15:52:02,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:02,652 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 59, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:02,653 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:02,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:02,653 INFO L82 PathProgramCache]: Analyzing trace with hash 963803275, now seen corresponding path program 59 times [2018-10-22 15:52:02,653 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:02,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:02,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:02,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:02,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:04,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:04,556 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 [2018-10-22 15:52:04,565 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:52:04,702 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-22 15:52:04,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:04,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:04,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:04,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-22 15:52:04,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-22 15:52:04,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-22 15:52:04,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2018-10-22 15:52:04,886 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 63 states. [2018-10-22 15:52:05,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:05,045 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-22 15:52:05,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-22 15:52:05,046 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 184 [2018-10-22 15:52:05,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:05,047 INFO L225 Difference]: With dead ends: 193 [2018-10-22 15:52:05,047 INFO L226 Difference]: Without dead ends: 189 [2018-10-22 15:52:05,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1897, Invalid=2135, Unknown=0, NotChecked=0, Total=4032 [2018-10-22 15:52:05,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-22 15:52:05,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2018-10-22 15:52:05,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-10-22 15:52:05,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-10-22 15:52:05,052 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 184 [2018-10-22 15:52:05,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:05,053 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-10-22 15:52:05,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-22 15:52:05,053 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-10-22 15:52:05,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-22 15:52:05,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:05,054 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 60, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:05,054 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:05,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:05,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1844563856, now seen corresponding path program 60 times [2018-10-22 15:52:05,054 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:05,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:05,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:05,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:05,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:06,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:06,561 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 [2018-10-22 15:52:06,569 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:52:06,714 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-22 15:52:06,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:06,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:06,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:06,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-22 15:52:06,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-22 15:52:06,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-22 15:52:06,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2018-10-22 15:52:06,816 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 64 states. [2018-10-22 15:52:06,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:06,980 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2018-10-22 15:52:06,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-22 15:52:06,980 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 187 [2018-10-22 15:52:06,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:06,981 INFO L225 Difference]: With dead ends: 196 [2018-10-22 15:52:06,981 INFO L226 Difference]: Without dead ends: 192 [2018-10-22 15:52:06,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1959, Invalid=2201, Unknown=0, NotChecked=0, Total=4160 [2018-10-22 15:52:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-22 15:52:06,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2018-10-22 15:52:06,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-22 15:52:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-22 15:52:06,986 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 187 [2018-10-22 15:52:06,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:06,986 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-22 15:52:06,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-22 15:52:06,986 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-22 15:52:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-22 15:52:06,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:06,988 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:06,988 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:06,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:06,988 INFO L82 PathProgramCache]: Analyzing trace with hash 53162603, now seen corresponding path program 61 times [2018-10-22 15:52:06,988 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:06,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:06,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:06,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:06,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:08,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:08,492 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 [2018-10-22 15:52:08,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:08,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:08,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:08,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-22 15:52:08,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-22 15:52:08,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-22 15:52:08,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2018-10-22 15:52:08,714 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 65 states. [2018-10-22 15:52:08,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:08,850 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-22 15:52:08,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-22 15:52:08,850 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 190 [2018-10-22 15:52:08,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:08,851 INFO L225 Difference]: With dead ends: 199 [2018-10-22 15:52:08,851 INFO L226 Difference]: Without dead ends: 195 [2018-10-22 15:52:08,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2022, Invalid=2268, Unknown=0, NotChecked=0, Total=4290 [2018-10-22 15:52:08,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-22 15:52:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2018-10-22 15:52:08,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-22 15:52:08,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-10-22 15:52:08,855 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 190 [2018-10-22 15:52:08,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:08,855 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-10-22 15:52:08,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-22 15:52:08,855 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-10-22 15:52:08,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-22 15:52:08,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:08,856 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 62, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:08,856 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:08,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:08,857 INFO L82 PathProgramCache]: Analyzing trace with hash 567585424, now seen corresponding path program 62 times [2018-10-22 15:52:08,857 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:08,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:08,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:08,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:08,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:10,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:10,678 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 [2018-10-22 15:52:10,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:52:10,782 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:10,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:10,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:10,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:10,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-22 15:52:10,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-22 15:52:10,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-22 15:52:10,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2018-10-22 15:52:10,890 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 66 states. [2018-10-22 15:52:11,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:11,041 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-10-22 15:52:11,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-22 15:52:11,041 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 193 [2018-10-22 15:52:11,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:11,042 INFO L225 Difference]: With dead ends: 202 [2018-10-22 15:52:11,043 INFO L226 Difference]: Without dead ends: 198 [2018-10-22 15:52:11,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2086, Invalid=2336, Unknown=0, NotChecked=0, Total=4422 [2018-10-22 15:52:11,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-22 15:52:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2018-10-22 15:52:11,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-22 15:52:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-22 15:52:11,048 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 193 [2018-10-22 15:52:11,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:11,048 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-22 15:52:11,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-22 15:52:11,048 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-22 15:52:11,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-22 15:52:11,049 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:11,049 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 63, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:11,049 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:11,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:11,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1294533707, now seen corresponding path program 63 times [2018-10-22 15:52:11,050 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:11,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:11,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:11,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:11,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:12,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:12,597 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 [2018-10-22 15:52:12,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:12,765 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-22 15:52:12,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:12,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:12,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:12,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-22 15:52:12,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-22 15:52:12,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-22 15:52:12,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2018-10-22 15:52:12,904 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 67 states. [2018-10-22 15:52:13,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:13,087 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-10-22 15:52:13,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-22 15:52:13,087 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 196 [2018-10-22 15:52:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:13,088 INFO L225 Difference]: With dead ends: 205 [2018-10-22 15:52:13,089 INFO L226 Difference]: Without dead ends: 201 [2018-10-22 15:52:13,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2151, Invalid=2405, Unknown=0, NotChecked=0, Total=4556 [2018-10-22 15:52:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-22 15:52:13,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2018-10-22 15:52:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-22 15:52:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-10-22 15:52:13,093 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 196 [2018-10-22 15:52:13,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:13,094 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-10-22 15:52:13,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-22 15:52:13,094 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-10-22 15:52:13,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-22 15:52:13,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:13,095 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:13,095 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:13,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:13,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1709241168, now seen corresponding path program 64 times [2018-10-22 15:52:13,096 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:13,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:13,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:13,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:13,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:15,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:15,072 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 [2018-10-22 15:52:15,080 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:15,185 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:15,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:15,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:15,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:15,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-22 15:52:15,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-22 15:52:15,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-22 15:52:15,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2018-10-22 15:52:15,328 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 68 states. [2018-10-22 15:52:15,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:15,513 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2018-10-22 15:52:15,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-22 15:52:15,513 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 199 [2018-10-22 15:52:15,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:15,514 INFO L225 Difference]: With dead ends: 208 [2018-10-22 15:52:15,515 INFO L226 Difference]: Without dead ends: 204 [2018-10-22 15:52:15,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2217, Invalid=2475, Unknown=0, NotChecked=0, Total=4692 [2018-10-22 15:52:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-22 15:52:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2018-10-22 15:52:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-22 15:52:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-22 15:52:15,518 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 199 [2018-10-22 15:52:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:15,518 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-22 15:52:15,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-22 15:52:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-22 15:52:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-22 15:52:15,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:15,519 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 65, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:15,520 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:15,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:15,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1522930133, now seen corresponding path program 65 times [2018-10-22 15:52:15,520 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:15,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:15,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:15,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:15,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:17,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:17,164 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 [2018-10-22 15:52:17,187 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:52:17,355 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-22 15:52:17,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:17,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:17,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:17,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-22 15:52:17,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-22 15:52:17,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-22 15:52:17,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2018-10-22 15:52:17,491 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 69 states. [2018-10-22 15:52:17,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:17,641 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-10-22 15:52:17,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-22 15:52:17,642 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 202 [2018-10-22 15:52:17,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:17,643 INFO L225 Difference]: With dead ends: 211 [2018-10-22 15:52:17,643 INFO L226 Difference]: Without dead ends: 207 [2018-10-22 15:52:17,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2284, Invalid=2546, Unknown=0, NotChecked=0, Total=4830 [2018-10-22 15:52:17,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-22 15:52:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2018-10-22 15:52:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-22 15:52:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-10-22 15:52:17,647 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 202 [2018-10-22 15:52:17,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:17,648 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-10-22 15:52:17,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-22 15:52:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-10-22 15:52:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-22 15:52:17,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:17,649 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 66, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:17,649 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:17,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:17,650 INFO L82 PathProgramCache]: Analyzing trace with hash -228632880, now seen corresponding path program 66 times [2018-10-22 15:52:17,650 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:17,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:17,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:17,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:17,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:19,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:19,662 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-22 15:52:19,669 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:52:19,834 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-22 15:52:19,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:19,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:19,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:19,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-22 15:52:19,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-22 15:52:19,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-22 15:52:19,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2018-10-22 15:52:19,947 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 70 states. [2018-10-22 15:52:20,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:20,158 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2018-10-22 15:52:20,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-22 15:52:20,158 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 205 [2018-10-22 15:52:20,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:20,159 INFO L225 Difference]: With dead ends: 214 [2018-10-22 15:52:20,159 INFO L226 Difference]: Without dead ends: 210 [2018-10-22 15:52:20,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2352, Invalid=2618, Unknown=0, NotChecked=0, Total=4970 [2018-10-22 15:52:20,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-22 15:52:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-10-22 15:52:20,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-22 15:52:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-10-22 15:52:20,162 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 205 [2018-10-22 15:52:20,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:20,162 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-10-22 15:52:20,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-22 15:52:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-10-22 15:52:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-22 15:52:20,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:20,163 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:20,164 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:20,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:20,164 INFO L82 PathProgramCache]: Analyzing trace with hash -2035552245, now seen corresponding path program 67 times [2018-10-22 15:52:20,164 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:20,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:20,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:20,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:20,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:21,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:21,911 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:21,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:22,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:22,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:22,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-22 15:52:22,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-22 15:52:22,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-22 15:52:22,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2018-10-22 15:52:22,363 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 71 states. [2018-10-22 15:52:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:22,593 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-22 15:52:22,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-22 15:52:22,593 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 208 [2018-10-22 15:52:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:22,594 INFO L225 Difference]: With dead ends: 217 [2018-10-22 15:52:22,594 INFO L226 Difference]: Without dead ends: 213 [2018-10-22 15:52:22,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2421, Invalid=2691, Unknown=0, NotChecked=0, Total=5112 [2018-10-22 15:52:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-22 15:52:22,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2018-10-22 15:52:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-10-22 15:52:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-10-22 15:52:22,598 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 208 [2018-10-22 15:52:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:22,598 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-10-22 15:52:22,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-22 15:52:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-10-22 15:52:22,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-22 15:52:22,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:22,600 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 68, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:22,600 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:22,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:22,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1149733104, now seen corresponding path program 68 times [2018-10-22 15:52:22,601 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:22,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:22,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:22,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:22,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:24,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:24,553 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:24,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:52:24,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:24,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:24,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:24,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:24,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-22 15:52:24,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-22 15:52:24,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-22 15:52:24,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2018-10-22 15:52:24,841 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 72 states. [2018-10-22 15:52:25,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:25,003 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2018-10-22 15:52:25,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-22 15:52:25,003 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 211 [2018-10-22 15:52:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:25,004 INFO L225 Difference]: With dead ends: 220 [2018-10-22 15:52:25,004 INFO L226 Difference]: Without dead ends: 216 [2018-10-22 15:52:25,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2491, Invalid=2765, Unknown=0, NotChecked=0, Total=5256 [2018-10-22 15:52:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-22 15:52:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2018-10-22 15:52:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-22 15:52:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-10-22 15:52:25,009 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 211 [2018-10-22 15:52:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:25,009 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-10-22 15:52:25,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-22 15:52:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-10-22 15:52:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-22 15:52:25,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:25,011 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 69, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:25,011 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:25,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:25,011 INFO L82 PathProgramCache]: Analyzing trace with hash 978127339, now seen corresponding path program 69 times [2018-10-22 15:52:25,011 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:25,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:25,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:25,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:25,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:26,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:26,918 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:26,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:27,106 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-22 15:52:27,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:27,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:27,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:27,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-22 15:52:27,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-22 15:52:27,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-22 15:52:27,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2018-10-22 15:52:27,220 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 73 states. [2018-10-22 15:52:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:27,405 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-10-22 15:52:27,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-22 15:52:27,406 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 214 [2018-10-22 15:52:27,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:27,407 INFO L225 Difference]: With dead ends: 223 [2018-10-22 15:52:27,407 INFO L226 Difference]: Without dead ends: 219 [2018-10-22 15:52:27,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2562, Invalid=2840, Unknown=0, NotChecked=0, Total=5402 [2018-10-22 15:52:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-22 15:52:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2018-10-22 15:52:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-22 15:52:27,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-10-22 15:52:27,411 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 214 [2018-10-22 15:52:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:27,412 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-10-22 15:52:27,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-22 15:52:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-10-22 15:52:27,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-22 15:52:27,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:27,413 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:27,413 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:27,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:27,413 INFO L82 PathProgramCache]: Analyzing trace with hash -318135536, now seen corresponding path program 70 times [2018-10-22 15:52:27,413 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:27,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:27,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:27,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:27,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:29,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:29,350 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:29,358 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:29,480 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:29,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:29,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:29,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:29,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-22 15:52:29,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-22 15:52:29,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-22 15:52:29,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2018-10-22 15:52:29,736 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 74 states. [2018-10-22 15:52:29,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:29,976 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2018-10-22 15:52:29,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-22 15:52:29,977 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 217 [2018-10-22 15:52:29,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:29,977 INFO L225 Difference]: With dead ends: 226 [2018-10-22 15:52:29,978 INFO L226 Difference]: Without dead ends: 222 [2018-10-22 15:52:29,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2634, Invalid=2916, Unknown=0, NotChecked=0, Total=5550 [2018-10-22 15:52:29,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-22 15:52:29,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2018-10-22 15:52:29,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-22 15:52:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-10-22 15:52:29,981 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 217 [2018-10-22 15:52:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:29,981 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-10-22 15:52:29,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-22 15:52:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-10-22 15:52:29,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-22 15:52:29,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:29,982 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 71, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:29,982 INFO L424 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:29,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:29,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1234486325, now seen corresponding path program 71 times [2018-10-22 15:52:29,982 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:29,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:29,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:29,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:29,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:31,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:31,934 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:31,941 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:52:32,123 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-22 15:52:32,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:32,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:32,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:32,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-22 15:52:32,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-22 15:52:32,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-22 15:52:32,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2018-10-22 15:52:32,243 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 75 states. [2018-10-22 15:52:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:32,490 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-10-22 15:52:32,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-22 15:52:32,490 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 220 [2018-10-22 15:52:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:32,491 INFO L225 Difference]: With dead ends: 229 [2018-10-22 15:52:32,491 INFO L226 Difference]: Without dead ends: 225 [2018-10-22 15:52:32,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2707, Invalid=2993, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:52:32,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-22 15:52:32,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2018-10-22 15:52:32,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-22 15:52:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2018-10-22 15:52:32,494 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 220 [2018-10-22 15:52:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:32,495 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2018-10-22 15:52:32,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-22 15:52:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2018-10-22 15:52:32,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-22 15:52:32,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:32,496 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 72, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:32,496 INFO L424 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:32,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:32,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1428708048, now seen corresponding path program 72 times [2018-10-22 15:52:32,496 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:32,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:32,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:32,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:32,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:34,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:34,500 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:34,507 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:52:34,703 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-22 15:52:34,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:34,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:34,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:34,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-22 15:52:34,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-22 15:52:34,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-22 15:52:34,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:52:34,916 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand 76 states. [2018-10-22 15:52:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:35,097 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-10-22 15:52:35,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-22 15:52:35,097 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 223 [2018-10-22 15:52:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:35,099 INFO L225 Difference]: With dead ends: 232 [2018-10-22 15:52:35,099 INFO L226 Difference]: Without dead ends: 228 [2018-10-22 15:52:35,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2781, Invalid=3071, Unknown=0, NotChecked=0, Total=5852 [2018-10-22 15:52:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-22 15:52:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2018-10-22 15:52:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-22 15:52:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-10-22 15:52:35,103 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 223 [2018-10-22 15:52:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:35,103 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-10-22 15:52:35,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-22 15:52:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-10-22 15:52:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-22 15:52:35,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:35,105 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:35,105 INFO L424 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:35,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:35,106 INFO L82 PathProgramCache]: Analyzing trace with hash 2127857067, now seen corresponding path program 73 times [2018-10-22 15:52:35,106 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:35,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:35,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:35,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:35,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:37,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:37,236 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:37,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:37,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:37,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:37,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-22 15:52:37,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-22 15:52:37,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-22 15:52:37,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2018-10-22 15:52:37,477 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 77 states. [2018-10-22 15:52:37,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:37,740 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-10-22 15:52:37,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-22 15:52:37,740 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 226 [2018-10-22 15:52:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:37,741 INFO L225 Difference]: With dead ends: 235 [2018-10-22 15:52:37,741 INFO L226 Difference]: Without dead ends: 231 [2018-10-22 15:52:37,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2856, Invalid=3150, Unknown=0, NotChecked=0, Total=6006 [2018-10-22 15:52:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-22 15:52:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2018-10-22 15:52:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-22 15:52:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2018-10-22 15:52:37,746 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 226 [2018-10-22 15:52:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:37,746 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2018-10-22 15:52:37,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-22 15:52:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2018-10-22 15:52:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-22 15:52:37,747 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:37,747 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 74, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:37,748 INFO L424 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:37,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:37,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1083994288, now seen corresponding path program 74 times [2018-10-22 15:52:37,748 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:37,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:37,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:37,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:37,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:40,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:40,080 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:40,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:52:40,202 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:40,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:40,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:40,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:40,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-22 15:52:40,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-22 15:52:40,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-22 15:52:40,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2018-10-22 15:52:40,330 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 78 states. [2018-10-22 15:52:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:40,573 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2018-10-22 15:52:40,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-22 15:52:40,573 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 229 [2018-10-22 15:52:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:40,574 INFO L225 Difference]: With dead ends: 238 [2018-10-22 15:52:40,574 INFO L226 Difference]: Without dead ends: 234 [2018-10-22 15:52:40,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2932, Invalid=3230, Unknown=0, NotChecked=0, Total=6162 [2018-10-22 15:52:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-22 15:52:40,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2018-10-22 15:52:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-10-22 15:52:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-10-22 15:52:40,579 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 229 [2018-10-22 15:52:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:40,579 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-10-22 15:52:40,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-22 15:52:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-10-22 15:52:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-22 15:52:40,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:40,580 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 75, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:40,581 INFO L424 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:40,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:40,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2066290805, now seen corresponding path program 75 times [2018-10-22 15:52:40,581 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:40,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:40,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:40,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:40,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:42,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:42,772 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:42,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:42,982 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-22 15:52:42,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:42,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:43,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:43,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-22 15:52:43,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-22 15:52:43,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-22 15:52:43,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2018-10-22 15:52:43,104 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 79 states. [2018-10-22 15:52:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:44,202 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-10-22 15:52:44,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-22 15:52:44,202 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 232 [2018-10-22 15:52:44,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:44,204 INFO L225 Difference]: With dead ends: 241 [2018-10-22 15:52:44,204 INFO L226 Difference]: Without dead ends: 237 [2018-10-22 15:52:44,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3009, Invalid=3311, Unknown=0, NotChecked=0, Total=6320 [2018-10-22 15:52:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-22 15:52:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2018-10-22 15:52:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-22 15:52:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2018-10-22 15:52:44,208 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 232 [2018-10-22 15:52:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:44,208 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2018-10-22 15:52:44,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-22 15:52:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2018-10-22 15:52:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-22 15:52:44,209 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:44,209 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:44,209 INFO L424 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:44,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:44,210 INFO L82 PathProgramCache]: Analyzing trace with hash 245326192, now seen corresponding path program 76 times [2018-10-22 15:52:44,210 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:44,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:44,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:44,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:44,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:46,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:46,748 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:46,755 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:46,873 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:46,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:46,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:46,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:46,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-22 15:52:46,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-22 15:52:46,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-22 15:52:46,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2018-10-22 15:52:46,999 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 80 states. [2018-10-22 15:52:47,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:47,181 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2018-10-22 15:52:47,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-22 15:52:47,181 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 235 [2018-10-22 15:52:47,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:47,183 INFO L225 Difference]: With dead ends: 244 [2018-10-22 15:52:47,183 INFO L226 Difference]: Without dead ends: 240 [2018-10-22 15:52:47,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3087, Invalid=3393, Unknown=0, NotChecked=0, Total=6480 [2018-10-22 15:52:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-10-22 15:52:47,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2018-10-22 15:52:47,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-22 15:52:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-10-22 15:52:47,186 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 235 [2018-10-22 15:52:47,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:47,187 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-10-22 15:52:47,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-22 15:52:47,187 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-10-22 15:52:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-22 15:52:47,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:47,188 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 77, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:47,188 INFO L424 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:47,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:47,189 INFO L82 PathProgramCache]: Analyzing trace with hash 121659755, now seen corresponding path program 77 times [2018-10-22 15:52:47,189 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:47,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:47,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:47,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:47,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:49,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:49,533 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:49,540 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:52:49,737 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-22 15:52:49,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:49,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:49,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:49,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-22 15:52:49,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-22 15:52:49,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-22 15:52:49,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2018-10-22 15:52:49,864 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 81 states. [2018-10-22 15:52:50,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:50,276 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-10-22 15:52:50,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-22 15:52:50,276 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 238 [2018-10-22 15:52:50,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:50,277 INFO L225 Difference]: With dead ends: 247 [2018-10-22 15:52:50,277 INFO L226 Difference]: Without dead ends: 243 [2018-10-22 15:52:50,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3166, Invalid=3476, Unknown=0, NotChecked=0, Total=6642 [2018-10-22 15:52:50,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-22 15:52:50,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2018-10-22 15:52:50,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-10-22 15:52:50,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2018-10-22 15:52:50,282 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 238 [2018-10-22 15:52:50,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:50,282 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2018-10-22 15:52:50,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-22 15:52:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2018-10-22 15:52:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-22 15:52:50,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:50,284 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 78, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:50,284 INFO L424 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:50,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:50,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1056775056, now seen corresponding path program 78 times [2018-10-22 15:52:50,285 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:50,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:50,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:50,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:50,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:52,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:52,677 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:52,685 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:52:52,887 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-22 15:52:52,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:52,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:53,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:53,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-22 15:52:53,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-22 15:52:53,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-22 15:52:53,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2018-10-22 15:52:53,019 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 82 states. [2018-10-22 15:52:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:53,345 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2018-10-22 15:52:53,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-22 15:52:53,345 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 241 [2018-10-22 15:52:53,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:53,346 INFO L225 Difference]: With dead ends: 250 [2018-10-22 15:52:53,346 INFO L226 Difference]: Without dead ends: 246 [2018-10-22 15:52:53,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3246, Invalid=3560, Unknown=0, NotChecked=0, Total=6806 [2018-10-22 15:52:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-22 15:52:53,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2018-10-22 15:52:53,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-22 15:52:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-10-22 15:52:53,350 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 241 [2018-10-22 15:52:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:53,350 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-10-22 15:52:53,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-22 15:52:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-10-22 15:52:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-22 15:52:53,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:53,351 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:53,352 INFO L424 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:53,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:53,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1918825291, now seen corresponding path program 79 times [2018-10-22 15:52:53,352 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:53,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:53,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:53,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:53,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:56,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:56,031 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:56,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:56,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:56,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:56,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-22 15:52:56,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-22 15:52:56,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-22 15:52:56,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2018-10-22 15:52:56,298 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 83 states. [2018-10-22 15:52:56,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:56,546 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-10-22 15:52:56,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-22 15:52:56,547 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 244 [2018-10-22 15:52:56,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:56,548 INFO L225 Difference]: With dead ends: 253 [2018-10-22 15:52:56,548 INFO L226 Difference]: Without dead ends: 249 [2018-10-22 15:52:56,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3327, Invalid=3645, Unknown=0, NotChecked=0, Total=6972 [2018-10-22 15:52:56,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-22 15:52:56,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2018-10-22 15:52:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-10-22 15:52:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-10-22 15:52:56,552 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 244 [2018-10-22 15:52:56,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:56,552 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-10-22 15:52:56,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-22 15:52:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-10-22 15:52:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-22 15:52:56,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:56,553 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 80, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:56,553 INFO L424 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:56,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:56,554 INFO L82 PathProgramCache]: Analyzing trace with hash -647053904, now seen corresponding path program 80 times [2018-10-22 15:52:56,554 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:56,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:56,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:56,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:56,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:59,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:59,049 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:59,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:52:59,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:59,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:59,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:59,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:59,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-22 15:52:59,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-22 15:52:59,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-22 15:52:59,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2018-10-22 15:52:59,360 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 84 states. [2018-10-22 15:52:59,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:59,686 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2018-10-22 15:52:59,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-22 15:52:59,686 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 247 [2018-10-22 15:52:59,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:59,687 INFO L225 Difference]: With dead ends: 256 [2018-10-22 15:52:59,687 INFO L226 Difference]: Without dead ends: 252 [2018-10-22 15:52:59,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3409, Invalid=3731, Unknown=0, NotChecked=0, Total=7140 [2018-10-22 15:52:59,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-10-22 15:52:59,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2018-10-22 15:52:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-22 15:52:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-10-22 15:52:59,691 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 247 [2018-10-22 15:52:59,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:59,691 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-10-22 15:52:59,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-22 15:52:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-10-22 15:52:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-22 15:52:59,692 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:59,693 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 81, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:59,693 INFO L424 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:59,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:59,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1073782059, now seen corresponding path program 81 times [2018-10-22 15:52:59,693 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:59,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:59,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:59,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:59,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:02,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:02,476 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:02,484 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:53:02,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-22 15:53:02,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:02,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:02,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:02,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-22 15:53:02,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-22 15:53:02,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-22 15:53:02,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2018-10-22 15:53:02,838 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 85 states. [2018-10-22 15:53:03,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:03,046 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-10-22 15:53:03,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-22 15:53:03,046 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 250 [2018-10-22 15:53:03,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:03,047 INFO L225 Difference]: With dead ends: 259 [2018-10-22 15:53:03,047 INFO L226 Difference]: Without dead ends: 255 [2018-10-22 15:53:03,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3492, Invalid=3818, Unknown=0, NotChecked=0, Total=7310 [2018-10-22 15:53:03,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-22 15:53:03,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2018-10-22 15:53:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-10-22 15:53:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 254 transitions. [2018-10-22 15:53:03,051 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 254 transitions. Word has length 250 [2018-10-22 15:53:03,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:03,052 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 254 transitions. [2018-10-22 15:53:03,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-22 15:53:03,052 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 254 transitions. [2018-10-22 15:53:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-22 15:53:03,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:03,053 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:03,054 INFO L424 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:03,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:03,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1768310736, now seen corresponding path program 82 times [2018-10-22 15:53:03,054 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:03,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:03,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:03,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:03,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:05,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:05,824 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:05,830 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:53:05,958 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:53:05,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:05,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:06,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:06,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-22 15:53:06,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-22 15:53:06,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-22 15:53:06,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2018-10-22 15:53:06,092 INFO L87 Difference]: Start difference. First operand 254 states and 254 transitions. Second operand 86 states. [2018-10-22 15:53:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:06,328 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2018-10-22 15:53:06,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-22 15:53:06,328 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 253 [2018-10-22 15:53:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:06,330 INFO L225 Difference]: With dead ends: 262 [2018-10-22 15:53:06,330 INFO L226 Difference]: Without dead ends: 258 [2018-10-22 15:53:06,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3576, Invalid=3906, Unknown=0, NotChecked=0, Total=7482 [2018-10-22 15:53:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-22 15:53:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2018-10-22 15:53:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-10-22 15:53:06,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-10-22 15:53:06,334 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 253 [2018-10-22 15:53:06,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:06,334 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-10-22 15:53:06,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-22 15:53:06,335 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-10-22 15:53:06,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-10-22 15:53:06,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:06,336 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 83, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:06,336 INFO L424 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:06,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:06,336 INFO L82 PathProgramCache]: Analyzing trace with hash -680304885, now seen corresponding path program 83 times [2018-10-22 15:53:06,336 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:06,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:06,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:06,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:06,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:08,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:08,930 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:08,938 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:53:09,164 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-22 15:53:09,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:09,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:09,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:09,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-22 15:53:09,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-22 15:53:09,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-22 15:53:09,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2018-10-22 15:53:09,295 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 87 states. [2018-10-22 15:53:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:09,744 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-10-22 15:53:09,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-22 15:53:09,744 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 256 [2018-10-22 15:53:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:09,746 INFO L225 Difference]: With dead ends: 265 [2018-10-22 15:53:09,746 INFO L226 Difference]: Without dead ends: 261 [2018-10-22 15:53:09,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3661, Invalid=3995, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:53:09,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-22 15:53:09,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2018-10-22 15:53:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-10-22 15:53:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 260 transitions. [2018-10-22 15:53:09,751 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 260 transitions. Word has length 256 [2018-10-22 15:53:09,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:09,751 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 260 transitions. [2018-10-22 15:53:09,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-22 15:53:09,751 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 260 transitions. [2018-10-22 15:53:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-10-22 15:53:09,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:09,752 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 84, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:09,753 INFO L424 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:09,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:09,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1663714832, now seen corresponding path program 84 times [2018-10-22 15:53:09,753 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:09,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:09,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:09,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:09,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:12,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:12,667 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:12,674 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:53:12,901 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-22 15:53:12,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:12,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:13,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:13,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-22 15:53:13,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-22 15:53:13,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-22 15:53:13,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:53:13,037 INFO L87 Difference]: Start difference. First operand 260 states and 260 transitions. Second operand 88 states. [2018-10-22 15:53:13,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:13,252 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2018-10-22 15:53:13,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-22 15:53:13,253 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 259 [2018-10-22 15:53:13,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:13,254 INFO L225 Difference]: With dead ends: 268 [2018-10-22 15:53:13,254 INFO L226 Difference]: Without dead ends: 264 [2018-10-22 15:53:13,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3747, Invalid=4085, Unknown=0, NotChecked=0, Total=7832 [2018-10-22 15:53:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-22 15:53:13,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2018-10-22 15:53:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-22 15:53:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-10-22 15:53:13,258 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 259 [2018-10-22 15:53:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:13,258 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-10-22 15:53:13,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-22 15:53:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-10-22 15:53:13,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-22 15:53:13,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:13,260 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 85, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:13,260 INFO L424 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:13,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:13,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1837447403, now seen corresponding path program 85 times [2018-10-22 15:53:13,260 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:13,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:13,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:13,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:13,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:16,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:16,244 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:16,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:53:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:16,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:16,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:16,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-22 15:53:16,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-22 15:53:16,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-22 15:53:16,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2018-10-22 15:53:16,522 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 89 states. [2018-10-22 15:53:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:16,789 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2018-10-22 15:53:16,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-22 15:53:16,790 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 262 [2018-10-22 15:53:16,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:16,791 INFO L225 Difference]: With dead ends: 271 [2018-10-22 15:53:16,791 INFO L226 Difference]: Without dead ends: 267 [2018-10-22 15:53:16,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3834, Invalid=4176, Unknown=0, NotChecked=0, Total=8010 [2018-10-22 15:53:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-22 15:53:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2018-10-22 15:53:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-10-22 15:53:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 266 transitions. [2018-10-22 15:53:16,795 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 266 transitions. Word has length 262 [2018-10-22 15:53:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:16,795 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 266 transitions. [2018-10-22 15:53:16,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-22 15:53:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 266 transitions. [2018-10-22 15:53:16,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-10-22 15:53:16,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:16,796 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 86, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:16,797 INFO L424 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:16,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:16,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1680806928, now seen corresponding path program 86 times [2018-10-22 15:53:16,797 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:16,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:16,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:16,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:53:16,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:19,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:19,630 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:19,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:53:19,772 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:53:19,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:19,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:19,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:19,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-22 15:53:19,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-22 15:53:19,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-22 15:53:19,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2018-10-22 15:53:19,911 INFO L87 Difference]: Start difference. First operand 266 states and 266 transitions. Second operand 90 states. [2018-10-22 15:53:20,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:20,315 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2018-10-22 15:53:20,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-22 15:53:20,316 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 265 [2018-10-22 15:53:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:20,317 INFO L225 Difference]: With dead ends: 274 [2018-10-22 15:53:20,317 INFO L226 Difference]: Without dead ends: 270 [2018-10-22 15:53:20,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3922, Invalid=4268, Unknown=0, NotChecked=0, Total=8190 [2018-10-22 15:53:20,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-22 15:53:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2018-10-22 15:53:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-22 15:53:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2018-10-22 15:53:20,321 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 265 [2018-10-22 15:53:20,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:20,321 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2018-10-22 15:53:20,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-22 15:53:20,321 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2018-10-22 15:53:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-10-22 15:53:20,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:20,322 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 87, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:20,322 INFO L424 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:20,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:20,323 INFO L82 PathProgramCache]: Analyzing trace with hash -461100341, now seen corresponding path program 87 times [2018-10-22 15:53:20,323 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:20,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:20,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:20,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:20,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:23,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:23,340 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:23,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:53:23,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-22 15:53:23,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:23,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:23,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:23,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-22 15:53:23,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-22 15:53:23,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-22 15:53:23,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2018-10-22 15:53:23,753 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 91 states. [2018-10-22 15:53:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:23,992 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-10-22 15:53:23,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-22 15:53:23,993 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 268 [2018-10-22 15:53:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:23,994 INFO L225 Difference]: With dead ends: 277 [2018-10-22 15:53:23,994 INFO L226 Difference]: Without dead ends: 273 [2018-10-22 15:53:23,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4011, Invalid=4361, Unknown=0, NotChecked=0, Total=8372 [2018-10-22 15:53:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-10-22 15:53:23,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2018-10-22 15:53:23,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2018-10-22 15:53:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2018-10-22 15:53:24,000 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 268 [2018-10-22 15:53:24,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:24,000 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2018-10-22 15:53:24,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-22 15:53:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2018-10-22 15:53:24,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-10-22 15:53:24,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:24,002 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 88, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:24,002 INFO L424 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:24,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:24,002 INFO L82 PathProgramCache]: Analyzing trace with hash 308565552, now seen corresponding path program 88 times [2018-10-22 15:53:24,002 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:24,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:24,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:24,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:24,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:27,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:27,045 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:27,054 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:53:27,201 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:53:27,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:27,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:27,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:27,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-22 15:53:27,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-22 15:53:27,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-22 15:53:27,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2018-10-22 15:53:27,348 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 92 states. [2018-10-22 15:53:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:27,663 INFO L93 Difference]: Finished difference Result 280 states and 280 transitions. [2018-10-22 15:53:27,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-22 15:53:27,664 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 271 [2018-10-22 15:53:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:27,666 INFO L225 Difference]: With dead ends: 280 [2018-10-22 15:53:27,666 INFO L226 Difference]: Without dead ends: 276 [2018-10-22 15:53:27,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4101, Invalid=4455, Unknown=0, NotChecked=0, Total=8556 [2018-10-22 15:53:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-10-22 15:53:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2018-10-22 15:53:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-10-22 15:53:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-10-22 15:53:27,671 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 271 [2018-10-22 15:53:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:27,671 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-10-22 15:53:27,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-22 15:53:27,671 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-10-22 15:53:27,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-10-22 15:53:27,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:27,672 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 89, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:27,673 INFO L424 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:27,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:27,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1405209429, now seen corresponding path program 89 times [2018-10-22 15:53:27,673 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:27,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:27,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:27,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:27,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:30,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:30,794 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:30,802 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:53:31,219 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-22 15:53:31,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:31,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:31,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:31,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-22 15:53:31,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-22 15:53:31,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-22 15:53:31,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2018-10-22 15:53:31,389 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 93 states. [2018-10-22 15:53:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:31,857 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2018-10-22 15:53:31,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-22 15:53:31,857 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 274 [2018-10-22 15:53:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:31,858 INFO L225 Difference]: With dead ends: 283 [2018-10-22 15:53:31,858 INFO L226 Difference]: Without dead ends: 279 [2018-10-22 15:53:31,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4192, Invalid=4550, Unknown=0, NotChecked=0, Total=8742 [2018-10-22 15:53:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-22 15:53:31,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2018-10-22 15:53:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-10-22 15:53:31,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2018-10-22 15:53:31,863 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 274 [2018-10-22 15:53:31,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:31,863 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2018-10-22 15:53:31,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-22 15:53:31,863 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2018-10-22 15:53:31,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-10-22 15:53:31,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:31,865 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 90, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:31,865 INFO L424 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:31,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:31,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2095546448, now seen corresponding path program 90 times [2018-10-22 15:53:31,865 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:31,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:31,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:31,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:31,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:35,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:35,169 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:35,177 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:53:35,479 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-22 15:53:35,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:35,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:35,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:35,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-22 15:53:35,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-22 15:53:35,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-22 15:53:35,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2018-10-22 15:53:35,655 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 94 states. [2018-10-22 15:53:36,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:36,140 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2018-10-22 15:53:36,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-22 15:53:36,140 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 277 [2018-10-22 15:53:36,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:36,141 INFO L225 Difference]: With dead ends: 286 [2018-10-22 15:53:36,142 INFO L226 Difference]: Without dead ends: 282 [2018-10-22 15:53:36,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4284, Invalid=4646, Unknown=0, NotChecked=0, Total=8930 [2018-10-22 15:53:36,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-10-22 15:53:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2018-10-22 15:53:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-10-22 15:53:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2018-10-22 15:53:36,146 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 277 [2018-10-22 15:53:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:36,146 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2018-10-22 15:53:36,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-22 15:53:36,147 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2018-10-22 15:53:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-10-22 15:53:36,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:36,148 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 91, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:36,148 INFO L424 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:36,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:36,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1576970613, now seen corresponding path program 91 times [2018-10-22 15:53:36,148 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:36,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:36,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:36,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:36,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:40,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:40,059 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:40,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:53:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:40,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:40,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:40,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-22 15:53:40,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-22 15:53:40,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-22 15:53:40,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2018-10-22 15:53:40,372 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand 95 states. [2018-10-22 15:53:40,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:40,858 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-10-22 15:53:40,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-22 15:53:40,858 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 280 [2018-10-22 15:53:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:40,859 INFO L225 Difference]: With dead ends: 289 [2018-10-22 15:53:40,859 INFO L226 Difference]: Without dead ends: 285 [2018-10-22 15:53:40,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4377, Invalid=4743, Unknown=0, NotChecked=0, Total=9120 [2018-10-22 15:53:40,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-10-22 15:53:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2018-10-22 15:53:40,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-10-22 15:53:40,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 284 transitions. [2018-10-22 15:53:40,864 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 284 transitions. Word has length 280 [2018-10-22 15:53:40,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:40,864 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 284 transitions. [2018-10-22 15:53:40,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-22 15:53:40,864 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 284 transitions. [2018-10-22 15:53:40,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-10-22 15:53:40,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:40,865 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 92, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:40,865 INFO L424 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:40,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:40,866 INFO L82 PathProgramCache]: Analyzing trace with hash 464163440, now seen corresponding path program 92 times [2018-10-22 15:53:40,866 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:40,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:40,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:40,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:53:40,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:44,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:44,190 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:44,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:53:44,355 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:53:44,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:44,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:44,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:44,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-22 15:53:44,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-22 15:53:44,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-22 15:53:44,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2018-10-22 15:53:44,543 INFO L87 Difference]: Start difference. First operand 284 states and 284 transitions. Second operand 96 states. [2018-10-22 15:53:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:44,905 INFO L93 Difference]: Finished difference Result 292 states and 292 transitions. [2018-10-22 15:53:44,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-22 15:53:44,905 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 283 [2018-10-22 15:53:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:44,907 INFO L225 Difference]: With dead ends: 292 [2018-10-22 15:53:44,907 INFO L226 Difference]: Without dead ends: 288 [2018-10-22 15:53:44,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4471, Invalid=4841, Unknown=0, NotChecked=0, Total=9312 [2018-10-22 15:53:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-10-22 15:53:44,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2018-10-22 15:53:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-10-22 15:53:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-10-22 15:53:44,914 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 283 [2018-10-22 15:53:44,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:44,914 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-10-22 15:53:44,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-22 15:53:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-10-22 15:53:44,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-10-22 15:53:44,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:44,916 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 93, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:44,916 INFO L424 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:44,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:44,917 INFO L82 PathProgramCache]: Analyzing trace with hash -258240405, now seen corresponding path program 93 times [2018-10-22 15:53:44,917 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:44,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:44,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:44,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:44,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:48,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:48,345 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:48,354 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:53:48,690 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-22 15:53:48,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:48,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:48,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:48,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-22 15:53:48,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-22 15:53:48,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-22 15:53:48,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2018-10-22 15:53:48,845 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 97 states. [2018-10-22 15:53:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:49,238 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2018-10-22 15:53:49,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-22 15:53:49,238 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 286 [2018-10-22 15:53:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:49,239 INFO L225 Difference]: With dead ends: 295 [2018-10-22 15:53:49,240 INFO L226 Difference]: Without dead ends: 291 [2018-10-22 15:53:49,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4566, Invalid=4940, Unknown=0, NotChecked=0, Total=9506 [2018-10-22 15:53:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-22 15:53:49,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2018-10-22 15:53:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-10-22 15:53:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 290 transitions. [2018-10-22 15:53:49,244 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 290 transitions. Word has length 286 [2018-10-22 15:53:49,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:49,244 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 290 transitions. [2018-10-22 15:53:49,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-22 15:53:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 290 transitions. [2018-10-22 15:53:49,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-10-22 15:53:49,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:49,245 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 94, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:49,245 INFO L424 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:49,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:49,246 INFO L82 PathProgramCache]: Analyzing trace with hash 689933456, now seen corresponding path program 94 times [2018-10-22 15:53:49,246 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:49,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:49,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:49,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:49,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:52,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:52,747 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:52,755 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:53:52,916 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:53:52,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:52,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:53,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:53,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-22 15:53:53,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-22 15:53:53,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-22 15:53:53,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2018-10-22 15:53:53,076 INFO L87 Difference]: Start difference. First operand 290 states and 290 transitions. Second operand 98 states. [2018-10-22 15:53:53,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:53,507 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2018-10-22 15:53:53,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-22 15:53:53,508 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 289 [2018-10-22 15:53:53,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:53,510 INFO L225 Difference]: With dead ends: 298 [2018-10-22 15:53:53,510 INFO L226 Difference]: Without dead ends: 294 [2018-10-22 15:53:53,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4662, Invalid=5040, Unknown=0, NotChecked=0, Total=9702 [2018-10-22 15:53:53,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-10-22 15:53:53,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2018-10-22 15:53:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-10-22 15:53:53,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2018-10-22 15:53:53,515 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 289 [2018-10-22 15:53:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:53,515 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2018-10-22 15:53:53,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-22 15:53:53,515 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2018-10-22 15:53:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-22 15:53:53,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:53,517 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 95, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:53,517 INFO L424 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:53,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:53,517 INFO L82 PathProgramCache]: Analyzing trace with hash -262479285, now seen corresponding path program 95 times [2018-10-22 15:53:53,517 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:53,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:53,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:53,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:53,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:57,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:57,043 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:57,054 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:53:57,424 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-22 15:53:57,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:57,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:57,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:57,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-22 15:53:57,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-22 15:53:57,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-22 15:53:57,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2018-10-22 15:53:57,583 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 99 states. [2018-10-22 15:53:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:58,140 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-10-22 15:53:58,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-22 15:53:58,140 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 292 [2018-10-22 15:53:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:58,142 INFO L225 Difference]: With dead ends: 301 [2018-10-22 15:53:58,142 INFO L226 Difference]: Without dead ends: 297 [2018-10-22 15:53:58,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4759, Invalid=5141, Unknown=0, NotChecked=0, Total=9900 [2018-10-22 15:53:58,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-10-22 15:53:58,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2018-10-22 15:53:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-10-22 15:53:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 296 transitions. [2018-10-22 15:53:58,147 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 296 transitions. Word has length 292 [2018-10-22 15:53:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:58,147 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 296 transitions. [2018-10-22 15:53:58,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-22 15:53:58,147 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 296 transitions. [2018-10-22 15:53:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-10-22 15:53:58,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:58,149 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 96, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:58,149 INFO L424 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:58,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:58,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1036489040, now seen corresponding path program 96 times [2018-10-22 15:53:58,149 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:58,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:58,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:58,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:58,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:01,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:01,773 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:01,782 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:54:02,153 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-22 15:54:02,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:02,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:02,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:02,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-22 15:54:02,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-22 15:54:02,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-22 15:54:02,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2018-10-22 15:54:02,319 INFO L87 Difference]: Start difference. First operand 296 states and 296 transitions. Second operand 100 states. [2018-10-22 15:54:02,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:02,743 INFO L93 Difference]: Finished difference Result 304 states and 304 transitions. [2018-10-22 15:54:02,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-22 15:54:02,743 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 295 [2018-10-22 15:54:02,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:02,744 INFO L225 Difference]: With dead ends: 304 [2018-10-22 15:54:02,744 INFO L226 Difference]: Without dead ends: 300 [2018-10-22 15:54:02,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4857, Invalid=5243, Unknown=0, NotChecked=0, Total=10100 [2018-10-22 15:54:02,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2018-10-22 15:54:02,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2018-10-22 15:54:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-22 15:54:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-10-22 15:54:02,749 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 295 [2018-10-22 15:54:02,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:02,750 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-10-22 15:54:02,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-22 15:54:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-10-22 15:54:02,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-22 15:54:02,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:02,751 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 97, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:02,751 INFO L424 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:02,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:02,752 INFO L82 PathProgramCache]: Analyzing trace with hash 118311979, now seen corresponding path program 97 times [2018-10-22 15:54:02,752 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:02,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:02,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:02,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:02,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:06,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:06,479 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:06,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:54:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:06,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:06,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:06,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-22 15:54:06,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-22 15:54:06,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-22 15:54:06,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2018-10-22 15:54:06,820 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 101 states. [2018-10-22 15:54:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:07,194 INFO L93 Difference]: Finished difference Result 307 states and 307 transitions. [2018-10-22 15:54:07,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-22 15:54:07,194 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 298 [2018-10-22 15:54:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:07,196 INFO L225 Difference]: With dead ends: 307 [2018-10-22 15:54:07,196 INFO L226 Difference]: Without dead ends: 303 [2018-10-22 15:54:07,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4956, Invalid=5346, Unknown=0, NotChecked=0, Total=10302 [2018-10-22 15:54:07,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-22 15:54:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 302. [2018-10-22 15:54:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-10-22 15:54:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 302 transitions. [2018-10-22 15:54:07,201 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 302 transitions. Word has length 298 [2018-10-22 15:54:07,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:07,201 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 302 transitions. [2018-10-22 15:54:07,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-22 15:54:07,201 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 302 transitions. [2018-10-22 15:54:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-10-22 15:54:07,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:07,203 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 98, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:07,203 INFO L424 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:07,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:07,203 INFO L82 PathProgramCache]: Analyzing trace with hash 107428048, now seen corresponding path program 98 times [2018-10-22 15:54:07,203 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:07,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:07,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:07,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:54:07,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:10,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:10,914 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:10,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:54:11,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:54:11,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:11,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:11,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:11,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-22 15:54:11,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-22 15:54:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-22 15:54:11,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2018-10-22 15:54:11,252 INFO L87 Difference]: Start difference. First operand 302 states and 302 transitions. Second operand 102 states. [2018-10-22 15:54:11,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:11,653 INFO L93 Difference]: Finished difference Result 310 states and 310 transitions. [2018-10-22 15:54:11,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-22 15:54:11,653 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 301 [2018-10-22 15:54:11,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:11,655 INFO L225 Difference]: With dead ends: 310 [2018-10-22 15:54:11,655 INFO L226 Difference]: Without dead ends: 306 [2018-10-22 15:54:11,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5056, Invalid=5450, Unknown=0, NotChecked=0, Total=10506 [2018-10-22 15:54:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-10-22 15:54:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2018-10-22 15:54:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-10-22 15:54:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2018-10-22 15:54:11,659 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 301 [2018-10-22 15:54:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:11,659 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2018-10-22 15:54:11,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-22 15:54:11,659 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2018-10-22 15:54:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-10-22 15:54:11,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:11,661 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 99, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:11,661 INFO L424 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:11,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:11,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2013213173, now seen corresponding path program 99 times [2018-10-22 15:54:11,661 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:11,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:11,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:11,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:11,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:15,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:15,520 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:15,528 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:54:15,874 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-22 15:54:15,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:15,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:16,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:16,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-22 15:54:16,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-22 15:54:16,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-22 15:54:16,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2018-10-22 15:54:16,057 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand 103 states. [2018-10-22 15:54:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:16,595 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-10-22 15:54:16,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-22 15:54:16,595 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 304 [2018-10-22 15:54:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:16,596 INFO L225 Difference]: With dead ends: 313 [2018-10-22 15:54:16,596 INFO L226 Difference]: Without dead ends: 309 [2018-10-22 15:54:16,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5157, Invalid=5555, Unknown=0, NotChecked=0, Total=10712 [2018-10-22 15:54:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-10-22 15:54:16,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2018-10-22 15:54:16,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-10-22 15:54:16,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 308 transitions. [2018-10-22 15:54:16,602 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 308 transitions. Word has length 304 [2018-10-22 15:54:16,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:16,602 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 308 transitions. [2018-10-22 15:54:16,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-22 15:54:16,602 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 308 transitions. [2018-10-22 15:54:16,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-10-22 15:54:16,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:16,604 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 100, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:16,604 INFO L424 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:16,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:16,604 INFO L82 PathProgramCache]: Analyzing trace with hash 933096176, now seen corresponding path program 100 times [2018-10-22 15:54:16,604 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:16,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:16,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:16,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:16,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:20,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:20,444 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:20,451 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:54:20,615 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:54:20,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:20,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:20,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:20,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-22 15:54:20,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-22 15:54:20,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-22 15:54:20,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2018-10-22 15:54:20,783 INFO L87 Difference]: Start difference. First operand 308 states and 308 transitions. Second operand 104 states. [2018-10-22 15:54:21,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:21,194 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2018-10-22 15:54:21,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-22 15:54:21,194 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 307 [2018-10-22 15:54:21,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:21,196 INFO L225 Difference]: With dead ends: 316 [2018-10-22 15:54:21,196 INFO L226 Difference]: Without dead ends: 312 [2018-10-22 15:54:21,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5259, Invalid=5661, Unknown=0, NotChecked=0, Total=10920 [2018-10-22 15:54:21,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-10-22 15:54:21,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2018-10-22 15:54:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-10-22 15:54:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-10-22 15:54:21,202 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 307 [2018-10-22 15:54:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:21,202 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-10-22 15:54:21,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-22 15:54:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-10-22 15:54:21,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-22 15:54:21,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:21,203 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 101, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:21,204 INFO L424 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:21,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:21,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1811716117, now seen corresponding path program 101 times [2018-10-22 15:54:21,204 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:21,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:21,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:21,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:21,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 0 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:25,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:25,087 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:25,093 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:54:25,417 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-10-22 15:54:25,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:25,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 0 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:25,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:25,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-22 15:54:25,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-22 15:54:25,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-22 15:54:25,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2018-10-22 15:54:25,739 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 105 states. [2018-10-22 15:54:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:26,190 INFO L93 Difference]: Finished difference Result 319 states and 319 transitions. [2018-10-22 15:54:26,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-22 15:54:26,190 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 310 [2018-10-22 15:54:26,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:26,191 INFO L225 Difference]: With dead ends: 319 [2018-10-22 15:54:26,191 INFO L226 Difference]: Without dead ends: 315 [2018-10-22 15:54:26,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5362, Invalid=5768, Unknown=0, NotChecked=0, Total=11130 [2018-10-22 15:54:26,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-22 15:54:26,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2018-10-22 15:54:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-10-22 15:54:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 314 transitions. [2018-10-22 15:54:26,197 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 314 transitions. Word has length 310 [2018-10-22 15:54:26,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:26,197 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 314 transitions. [2018-10-22 15:54:26,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-22 15:54:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 314 transitions. [2018-10-22 15:54:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-10-22 15:54:26,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:26,199 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 102, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:26,199 INFO L424 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:26,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:26,199 INFO L82 PathProgramCache]: Analyzing trace with hash -632388336, now seen corresponding path program 102 times [2018-10-22 15:54:26,199 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:26,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:26,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:26,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:26,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15657 backedges. 0 proven. 15657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:30,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:30,180 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:30,187 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:54:30,523 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-10-22 15:54:30,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:30,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15657 backedges. 0 proven. 15657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:30,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:30,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-22 15:54:30,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-22 15:54:30,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-22 15:54:30,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2018-10-22 15:54:30,691 INFO L87 Difference]: Start difference. First operand 314 states and 314 transitions. Second operand 106 states. [2018-10-22 15:54:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:31,130 INFO L93 Difference]: Finished difference Result 322 states and 322 transitions. [2018-10-22 15:54:31,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-22 15:54:31,130 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 313 [2018-10-22 15:54:31,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:31,131 INFO L225 Difference]: With dead ends: 322 [2018-10-22 15:54:31,131 INFO L226 Difference]: Without dead ends: 318 [2018-10-22 15:54:31,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5466, Invalid=5876, Unknown=0, NotChecked=0, Total=11342 [2018-10-22 15:54:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-10-22 15:54:31,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2018-10-22 15:54:31,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-10-22 15:54:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2018-10-22 15:54:31,137 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 313 [2018-10-22 15:54:31,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:31,137 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2018-10-22 15:54:31,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-22 15:54:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2018-10-22 15:54:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-10-22 15:54:31,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:31,139 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 103, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:31,139 INFO L424 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:31,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:31,140 INFO L82 PathProgramCache]: Analyzing trace with hash -110945845, now seen corresponding path program 103 times [2018-10-22 15:54:31,140 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:31,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:31,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:31,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:31,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15965 backedges. 0 proven. 15965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:35,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:35,179 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:35,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:54:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:35,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 15965 backedges. 0 proven. 15965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:35,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:35,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-22 15:54:35,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-22 15:54:35,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-22 15:54:35,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2018-10-22 15:54:35,551 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 107 states. [2018-10-22 15:54:36,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:36,091 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-10-22 15:54:36,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-22 15:54:36,091 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 316 [2018-10-22 15:54:36,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:36,093 INFO L225 Difference]: With dead ends: 325 [2018-10-22 15:54:36,093 INFO L226 Difference]: Without dead ends: 321 [2018-10-22 15:54:36,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 316 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5571, Invalid=5985, Unknown=0, NotChecked=0, Total=11556 [2018-10-22 15:54:36,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-10-22 15:54:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2018-10-22 15:54:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-10-22 15:54:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 320 transitions. [2018-10-22 15:54:36,098 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 320 transitions. Word has length 316 [2018-10-22 15:54:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:36,099 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 320 transitions. [2018-10-22 15:54:36,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-22 15:54:36,099 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 320 transitions. [2018-10-22 15:54:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-22 15:54:36,100 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:36,100 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 104, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:36,100 INFO L424 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:36,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash -714406096, now seen corresponding path program 104 times [2018-10-22 15:54:36,101 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:36,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:36,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:36,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:54:36,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-22 15:54:38,627 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:54:38,631 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:54:38,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:54:38 BoogieIcfgContainer [2018-10-22 15:54:38,632 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:54:38,633 INFO L168 Benchmark]: Toolchain (without parser) took 231427.28 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 957.3 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -892.6 MB). Peak memory consumption was 64.8 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:38,634 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-10-22 15:54:38,634 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.97 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: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:38,635 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.15 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. [2018-10-22 15:54:38,635 INFO L168 Benchmark]: Boogie Preprocessor took 23.98 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. [2018-10-22 15:54:38,635 INFO L168 Benchmark]: RCFGBuilder took 306.47 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 719.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -771.4 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:38,636 INFO L168 Benchmark]: TraceAbstraction took 230738.83 ms. Allocated memory was 2.2 GB in the beginning and 2.5 GB in the end (delta: 238.0 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -134.3 MB). Peak memory consumption was 103.7 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:38,638 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 310.97 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: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.15 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 23.98 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 306.47 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 719.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -771.4 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 230738.83 ms. Allocated memory was 2.2 GB in the beginning and 2.5 GB in the end (delta: 238.0 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -134.3 MB). Peak memory consumption was 103.7 MB. 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 320 with TraceHistMax 105,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 83 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. TIMEOUT Result, 230.6s OverallTime, 106 OverallIterations, 105 TraceHistogramMax, 25.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 742 SDtfs, 5562 SDslu, 23554 SDs, 0 SdLazy, 8998 SolverSat, 181 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22560 GetRequests, 16794 SyntacticMatches, 102 SemanticMatches, 5664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10710 ImplicationChecksByTransitivity, 174.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=320occurred in iteration=105, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 105 MinimizatonAttempts, 103 StatesRemovedByMinimization, 103 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.7s SsaConstructionTime, 15.7s SatisfiabilityAnalysisTime, 178.6s InterpolantComputationTime, 33591 NumberOfCodeBlocks, 33591 NumberOfCodeBlocksAsserted, 2928 NumberOfCheckSat, 33383 ConstructedInterpolants, 0 QuantifiedInterpolants, 21002125 SizeOfPredicates, 308 NumberOfNonLiveVariables, 65920 ConjunctsInSsa, 6073 ConjunctsInUnsatCore, 208 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1114048 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown