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-crafted/simple_array_index_value_true-unreach-call2_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:45:52,465 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:45:52,471 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:45:52,490 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:45:52,490 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:45:52,491 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:45:52,495 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:45:52,498 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:45:52,499 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:45:52,500 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:45:52,501 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:45:52,501 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:45:52,502 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:45:52,503 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:45:52,504 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:45:52,505 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:45:52,509 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:45:52,513 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:45:52,520 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:45:52,525 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:45:52,526 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:45:52,527 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:45:52,532 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:45:52,549 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 15:45:52,570 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:45:52,570 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:45:52,571 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:45:52,571 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:45:52,572 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:45:52,572 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:45:52,572 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:45:52,572 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:45:52,572 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:45:52,573 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:45:52,573 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:45:52,573 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:45:52,573 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:45:52,573 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:45:52,574 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:45:52,574 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:45:52,574 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:45:52,574 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:45:52,574 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:45:52,575 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:45:52,575 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:45:52,575 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:45:52,575 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:45:52,575 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:45:52,576 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:45:52,576 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:45:52,576 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:45:52,576 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:45:52,618 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:45:52,633 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:45:52,636 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:45:52,638 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:45:52,638 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:45:52,639 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call2_true-termination.i [2018-10-22 15:45:52,705 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4eaf7f475/3eb48195798143a3b6402ac01b8d0d37/FLAGd2caf94c2 [2018-10-22 15:45:53,166 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:45:53,167 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call2_true-termination.i [2018-10-22 15:45:53,173 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4eaf7f475/3eb48195798143a3b6402ac01b8d0d37/FLAGd2caf94c2 [2018-10-22 15:45:53,198 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4eaf7f475/3eb48195798143a3b6402ac01b8d0d37 [2018-10-22 15:45:53,210 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:45:53,212 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:45:53,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:45:53,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:45:53,218 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:45:53,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:45:53" (1/1) ... [2018-10-22 15:45:53,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9fe7b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:45:53, skipping insertion in model container [2018-10-22 15:45:53,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:45:53" (1/1) ... [2018-10-22 15:45:53,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:45:53,256 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:45:53,455 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:45:53,459 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:45:53,480 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:45:53,502 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:45:53,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:45:53 WrapperNode [2018-10-22 15:45:53,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:45:53,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:45:53,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:45:53,504 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:45:53,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:45:53" (1/1) ... [2018-10-22 15:45:53,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:45:53" (1/1) ... [2018-10-22 15:45:53,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:45:53,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:45:53,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:45:53,547 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:45:53,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:45:53" (1/1) ... [2018-10-22 15:45:53,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:45:53" (1/1) ... [2018-10-22 15:45:53,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:45:53" (1/1) ... [2018-10-22 15:45:53,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:45:53" (1/1) ... [2018-10-22 15:45:53,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:45:53" (1/1) ... [2018-10-22 15:45:53,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:45:53" (1/1) ... [2018-10-22 15:45:53,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:45:53" (1/1) ... [2018-10-22 15:45:53,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:45:53,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:45:53,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:45:53,573 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:45:53,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:45:53" (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 15:45:53,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:45:53,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:45:54,120 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:45:54,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:45:54 BoogieIcfgContainer [2018-10-22 15:45:54,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:45:54,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:45:54,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:45:54,126 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:45:54,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:45:53" (1/3) ... [2018-10-22 15:45:54,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6893ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:45:54, skipping insertion in model container [2018-10-22 15:45:54,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:45:53" (2/3) ... [2018-10-22 15:45:54,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6893ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:45:54, skipping insertion in model container [2018-10-22 15:45:54,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:45:54" (3/3) ... [2018-10-22 15:45:54,129 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_true-unreach-call2_true-termination.i [2018-10-22 15:45:54,139 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:45:54,147 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:45:54,162 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:45:54,191 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:45:54,192 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:45:54,192 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:45:54,192 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:45:54,192 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:45:54,192 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:45:54,193 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:45:54,193 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:45:54,193 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:45:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-10-22 15:45:54,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-22 15:45:54,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:54,224 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:54,227 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:54,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:54,236 INFO L82 PathProgramCache]: Analyzing trace with hash 413341548, now seen corresponding path program 1 times [2018-10-22 15:45:54,238 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:54,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:54,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:54,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:45:54,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:54,353 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 15:45:54,355 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:45:54,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:45:54,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:45:54,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:45:54,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:45:54,377 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2018-10-22 15:45:54,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:54,391 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-10-22 15:45:54,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:45:54,393 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-10-22 15:45:54,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:54,404 INFO L225 Difference]: With dead ends: 29 [2018-10-22 15:45:54,404 INFO L226 Difference]: Without dead ends: 13 [2018-10-22 15:45:54,407 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 15:45:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-22 15:45:54,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-22 15:45:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-22 15:45:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-22 15:45:54,440 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2018-10-22 15:45:54,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:54,441 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-22 15:45:54,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:45:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-22 15:45:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-22 15:45:54,442 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:54,442 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:54,442 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:54,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:54,443 INFO L82 PathProgramCache]: Analyzing trace with hash 298208402, now seen corresponding path program 1 times [2018-10-22 15:45:54,443 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:54,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:54,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:54,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:45:54,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:54,521 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 15:45:54,522 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:45:54,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:45:54,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:45:54,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:45:54,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:45:54,524 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2018-10-22 15:45:54,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:54,619 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-10-22 15:45:54,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:45:54,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-22 15:45:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:54,620 INFO L225 Difference]: With dead ends: 31 [2018-10-22 15:45:54,621 INFO L226 Difference]: Without dead ends: 23 [2018-10-22 15:45:54,622 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 15:45:54,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-22 15:45:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2018-10-22 15:45:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-22 15:45:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-22 15:45:54,626 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 9 [2018-10-22 15:45:54,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:54,627 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-22 15:45:54,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:45:54,627 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-22 15:45:54,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 15:45:54,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:54,628 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:54,629 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:54,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:54,629 INFO L82 PathProgramCache]: Analyzing trace with hash -987782960, now seen corresponding path program 1 times [2018-10-22 15:45:54,630 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:54,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:54,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:54,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:45:54,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:54,761 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 15:45:54,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:54,762 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 15:45:54,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:45:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:54,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:54,908 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-10-22 15:45:54,917 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-22 15:45:54,917 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:45:54,933 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:45:54,941 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:45:54,942 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2018-10-22 15:45:55,145 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 15:45:55,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:55,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2018-10-22 15:45:55,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:45:55,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:45:55,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:45:55,182 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2018-10-22 15:45:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:55,555 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-10-22 15:45:55,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:45:55,556 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-22 15:45:55,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:55,557 INFO L225 Difference]: With dead ends: 39 [2018-10-22 15:45:55,557 INFO L226 Difference]: Without dead ends: 31 [2018-10-22 15:45:55,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:45:55,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-22 15:45:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2018-10-22 15:45:55,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 15:45:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-22 15:45:55,563 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 12 [2018-10-22 15:45:55,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:55,563 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-22 15:45:55,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:45:55,564 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-22 15:45:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-22 15:45:55,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:55,565 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:55,565 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:55,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:55,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1126672101, now seen corresponding path program 1 times [2018-10-22 15:45:55,566 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:55,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:55,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:55,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:45:55,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:45:55,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:55,794 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:45:55,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:45:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:55,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:55,977 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:45:55,981 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:45:55,981 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:45:55,983 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:45:56,002 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:45:56,002 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-22 15:45:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:56,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:56,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 11 [2018-10-22 15:45:56,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:45:56,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:45:56,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:45:56,412 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-10-22 15:45:56,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:56,939 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2018-10-22 15:45:56,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:45:56,940 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-22 15:45:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:56,941 INFO L225 Difference]: With dead ends: 50 [2018-10-22 15:45:56,941 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 15:45:56,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:45:56,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 15:45:56,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2018-10-22 15:45:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-22 15:45:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-22 15:45:56,950 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 20 [2018-10-22 15:45:56,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:56,951 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-22 15:45:56,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:45:56,951 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-22 15:45:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-22 15:45:56,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:56,952 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:56,952 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:56,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:56,953 INFO L82 PathProgramCache]: Analyzing trace with hash -741672528, now seen corresponding path program 2 times [2018-10-22 15:45:56,953 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:56,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:56,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:56,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:45:56,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-22 15:45:57,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:57,143 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 15:45:57,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:45:57,209 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:45:57,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:45:57,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:57,266 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:45:57,268 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:45:57,268 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:45:57,271 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:45:57,278 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:45:57,278 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-22 15:45:57,543 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 15:45:57,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:57,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 14 [2018-10-22 15:45:57,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:45:57,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:45:57,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:45:57,565 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 14 states. [2018-10-22 15:45:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:59,770 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2018-10-22 15:45:59,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:45:59,772 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2018-10-22 15:45:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:59,773 INFO L225 Difference]: With dead ends: 63 [2018-10-22 15:45:59,773 INFO L226 Difference]: Without dead ends: 47 [2018-10-22 15:45:59,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:45:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-22 15:45:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2018-10-22 15:45:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-22 15:45:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-22 15:45:59,790 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 28 [2018-10-22 15:45:59,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:59,790 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-22 15:45:59,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:45:59,790 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-22 15:45:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-22 15:45:59,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:59,794 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:59,794 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:59,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:59,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2008633403, now seen corresponding path program 3 times [2018-10-22 15:45:59,795 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:59,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:59,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:59,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:45:59,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-22 15:46:00,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:00,198 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 15:46:00,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:46:00,712 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-22 15:46:00,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:00,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:00,818 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 14 [2018-10-22 15:46:00,821 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2018-10-22 15:46:00,822 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:46:00,824 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:46:00,832 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:46:00,833 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2018-10-22 15:46:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-22 15:46:00,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:00,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2018-10-22 15:46:00,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:46:00,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:46:00,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:46:00,982 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 12 states. [2018-10-22 15:46:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:01,413 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-10-22 15:46:01,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:46:01,414 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2018-10-22 15:46:01,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:01,415 INFO L225 Difference]: With dead ends: 78 [2018-10-22 15:46:01,415 INFO L226 Difference]: Without dead ends: 57 [2018-10-22 15:46:01,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:46:01,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-22 15:46:01,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2018-10-22 15:46:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-22 15:46:01,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-22 15:46:01,424 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2018-10-22 15:46:01,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:01,425 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-22 15:46:01,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:46:01,425 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-22 15:46:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-22 15:46:01,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:01,426 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:01,426 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:01,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:01,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1573602621, now seen corresponding path program 4 times [2018-10-22 15:46:01,427 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:01,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:01,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:01,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:01,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-22 15:46:04,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:04,009 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:46:04,023 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:46:04,077 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:46:04,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:04,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:04,150 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:46:04,154 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:46:04,154 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:46:04,156 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:46:04,163 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:46:04,163 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-22 15:46:04,184 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:46:04,229 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2018-10-22 15:46:04,231 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:46:04,246 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:46:04,258 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-22 15:46:04,259 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:32 [2018-10-22 15:46:04,757 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2018-10-22 15:46:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:46:04,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:04,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 18 [2018-10-22 15:46:04,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:46:04,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:46:04,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=255, Unknown=1, NotChecked=0, Total=306 [2018-10-22 15:46:04,909 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2018-10-22 15:46:05,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:05,483 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2018-10-22 15:46:05,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:46:05,483 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2018-10-22 15:46:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:05,484 INFO L225 Difference]: With dead ends: 86 [2018-10-22 15:46:05,484 INFO L226 Difference]: Without dead ends: 65 [2018-10-22 15:46:05,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=85, Invalid=466, Unknown=1, NotChecked=0, Total=552 [2018-10-22 15:46:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-22 15:46:05,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2018-10-22 15:46:05,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-22 15:46:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-22 15:46:05,494 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 39 [2018-10-22 15:46:05,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:05,495 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-22 15:46:05,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:46:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-22 15:46:05,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-22 15:46:05,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:05,496 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:05,497 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:05,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1336865390, now seen corresponding path program 5 times [2018-10-22 15:46:05,497 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:05,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:05,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:05,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:05,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-22 15:46:10,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:10,382 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 15:46:10,390 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:46:34,673 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-22 15:46:34,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:34,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:34,747 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:46:34,750 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:46:34,751 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:46:34,752 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:46:34,758 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:46:34,759 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-22 15:46:34,782 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:46:34,818 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2018-10-22 15:46:34,828 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:46:34,859 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:46:34,875 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-22 15:46:34,875 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:32 [2018-10-22 15:46:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:46:35,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:35,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 21 [2018-10-22 15:46:35,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:46:35,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:46:35,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=357, Unknown=2, NotChecked=0, Total=420 [2018-10-22 15:46:35,461 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 21 states. [2018-10-22 15:46:36,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:36,849 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2018-10-22 15:46:36,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:46:36,851 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2018-10-22 15:46:36,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:36,852 INFO L225 Difference]: With dead ends: 99 [2018-10-22 15:46:36,852 INFO L226 Difference]: Without dead ends: 73 [2018-10-22 15:46:36,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=97, Invalid=603, Unknown=2, NotChecked=0, Total=702 [2018-10-22 15:46:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-22 15:46:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2018-10-22 15:46:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-22 15:46:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-10-22 15:46:36,878 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 47 [2018-10-22 15:46:36,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:36,878 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-10-22 15:46:36,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:46:36,878 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-10-22 15:46:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-22 15:46:36,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:36,882 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:36,882 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:36,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:36,883 INFO L82 PathProgramCache]: Analyzing trace with hash -298184611, now seen corresponding path program 6 times [2018-10-22 15:46:36,883 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:36,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:36,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:36,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:36,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-10-22 15:46:39,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:39,150 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:46:39,157 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:46:42,901 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-22 15:46:42,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:42,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:43,030 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:46:43,032 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:46:43,033 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:46:43,034 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:46:43,040 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:46:43,041 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-22 15:46:43,067 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2018-10-22 15:46:43,086 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2018-10-22 15:46:43,088 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:46:43,130 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:46:43,141 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:46:43,141 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2018-10-22 15:46:45,872 WARN L179 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2018-10-22 15:46:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 3 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:46,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:46,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 20] total 27 [2018-10-22 15:46:46,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:46:46,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:46:46,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:46:46,534 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 27 states. [2018-10-22 15:46:52,954 WARN L179 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-10-22 15:47:14,749 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2018-10-22 15:47:19,392 WARN L179 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2018-10-22 15:47:21,519 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0.base|))) (and (<= (+ (* 4294967296 (div (+ c_ULTIMATE.start_main_~index~0 4294967289) 4294967296)) 6) c_ULTIMATE.start_main_~index~0) (< 5 (mod (select .cse0 (+ |c_ULTIMATE.start_main_~#array~0.offset| 20)) 4294967296)) (exists ((ULTIMATE.start_main_~index~0 Int)) (and (<= 10000 (mod ULTIMATE.start_main_~index~0 4294967296)) (let ((.cse1 (mod (+ ULTIMATE.start_main_~index~0 4294967295) 4294967296))) (< .cse1 (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0.base|) (+ |c_ULTIMATE.start_main_~#array~0.offset| (* 4 .cse1))) 4294967296))))) (let ((.cse2 (mod (+ c_ULTIMATE.start_main_~index~0 4294967295) 4294967296))) (< .cse2 (mod (select .cse0 (+ |c_ULTIMATE.start_main_~#array~0.offset| (* 4 .cse2))) 4294967296))))) is different from false [2018-10-22 15:47:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:21,527 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2018-10-22 15:47:21,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:47:21,528 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2018-10-22 15:47:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:21,529 INFO L225 Difference]: With dead ends: 101 [2018-10-22 15:47:21,529 INFO L226 Difference]: Without dead ends: 70 [2018-10-22 15:47:21,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=161, Invalid=1172, Unknown=3, NotChecked=70, Total=1406 [2018-10-22 15:47:21,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-22 15:47:21,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2018-10-22 15:47:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-22 15:47:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-10-22 15:47:21,547 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 55 [2018-10-22 15:47:21,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:21,547 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-10-22 15:47:21,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:47:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-10-22 15:47:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-22 15:47:21,549 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:21,551 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:21,551 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:21,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:21,551 INFO L82 PathProgramCache]: Analyzing trace with hash 743567986, now seen corresponding path program 7 times [2018-10-22 15:47:21,551 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:21,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:21,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:21,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:21,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-10-22 15:47:22,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:22,602 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 15:47:22,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:22,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:22,830 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:47:22,846 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:47:22,847 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:47:22,870 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:47:22,945 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:47:22,946 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-22 15:47:22,968 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:47:22,981 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2018-10-22 15:47:22,983 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:47:22,993 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:47:23,004 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-22 15:47:23,005 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:32 [2018-10-22 15:47:26,682 WARN L179 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 24 [2018-10-22 15:47:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 3 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:40,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:40,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20] total 28 [2018-10-22 15:47:40,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:47:40,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:47:40,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=664, Unknown=6, NotChecked=0, Total=756 [2018-10-22 15:47:40,034 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 28 states. [2018-10-22 15:47:44,868 WARN L179 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 31 [2018-10-22 15:47:56,201 WARN L179 SmtUtils]: Spent 2.32 s on a formula simplification that was a NOOP. DAG size: 31 [2018-10-22 15:48:10,092 WARN L179 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 26 [2018-10-22 15:48:18,055 WARN L179 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 26 [2018-10-22 15:48:20,446 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 15 [2018-10-22 15:48:27,564 WARN L179 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2018-10-22 15:48:31,121 WARN L179 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 34 [2018-10-22 15:48:32,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:32,040 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2018-10-22 15:48:32,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:48:32,041 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2018-10-22 15:48:32,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:32,042 INFO L225 Difference]: With dead ends: 126 [2018-10-22 15:48:32,042 INFO L226 Difference]: Without dead ends: 90 [2018-10-22 15:48:32,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 46.3s TimeCoverageRelationStatistics Valid=172, Invalid=1374, Unknown=14, NotChecked=0, Total=1560 [2018-10-22 15:48:32,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-22 15:48:32,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2018-10-22 15:48:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-22 15:48:32,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-22 15:48:32,060 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 63 [2018-10-22 15:48:32,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:32,061 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-22 15:48:32,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:48:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-22 15:48:32,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-22 15:48:32,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:32,062 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:32,063 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:32,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:32,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2134307709, now seen corresponding path program 8 times [2018-10-22 15:48:32,063 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:32,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:32,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:32,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:32,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-22 15:48:37,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:37,686 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:48:37,694 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:37,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:37,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:37,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:37,867 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:48:37,869 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:48:37,869 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:48:37,870 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:48:37,875 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:48:37,876 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-22 15:48:37,922 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:48:37,942 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2018-10-22 15:48:37,944 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:48:37,954 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:48:37,966 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-22 15:48:37,966 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:32 [2018-10-22 15:48:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 249 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:48:39,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:39,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21] total 30 [2018-10-22 15:48:39,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:48:39,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:48:39,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=778, Unknown=2, NotChecked=0, Total=870 [2018-10-22 15:48:39,709 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 30 states. [2018-10-22 15:48:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:59,032 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2018-10-22 15:48:59,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:48:59,035 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 71 [2018-10-22 15:48:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:59,036 INFO L225 Difference]: With dead ends: 138 [2018-10-22 15:48:59,036 INFO L226 Difference]: Without dead ends: 97 [2018-10-22 15:48:59,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=125, Invalid=1133, Unknown=2, NotChecked=0, Total=1260 [2018-10-22 15:48:59,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-22 15:48:59,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2018-10-22 15:48:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 15:48:59,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-10-22 15:48:59,060 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 71 [2018-10-22 15:48:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:59,060 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-10-22 15:48:59,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:48:59,060 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-10-22 15:48:59,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-22 15:48:59,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:59,062 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:59,062 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:59,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:59,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1239138130, now seen corresponding path program 9 times [2018-10-22 15:48:59,063 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:59,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:59,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:59,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:59,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2018-10-22 15:49:11,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:11,884 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 15:49:11,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:04,424 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-22 15:50:04,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:04,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:04,682 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:50:04,683 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:50:04,684 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:50:04,693 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:04,697 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:04,698 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-22 15:50:04,725 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:50:04,741 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2018-10-22 15:50:04,743 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:50:04,758 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:50:04,776 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2018-10-22 15:50:04,777 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:37 [2018-10-22 15:50:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:05,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:05,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 26] total 36 [2018-10-22 15:50:05,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:50:05,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:50:05,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1119, Unknown=4, NotChecked=0, Total=1260 [2018-10-22 15:50:05,951 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 36 states. [2018-10-22 15:50:08,341 WARN L179 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2018-10-22 15:50:10,240 WARN L179 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2018-10-22 15:50:10,600 WARN L179 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2018-10-22 15:50:11,371 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2018-10-22 15:50:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:15,919 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2018-10-22 15:50:15,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:50:15,920 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2018-10-22 15:50:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:15,921 INFO L225 Difference]: With dead ends: 158 [2018-10-22 15:50:15,921 INFO L226 Difference]: Without dead ends: 112 [2018-10-22 15:50:15,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=330, Invalid=2216, Unknown=4, NotChecked=0, Total=2550 [2018-10-22 15:50:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-22 15:50:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 88. [2018-10-22 15:50:15,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-22 15:50:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-10-22 15:50:15,942 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 79 [2018-10-22 15:50:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:15,943 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-10-22 15:50:15,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:50:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-10-22 15:50:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-22 15:50:15,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:15,944 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:15,945 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:15,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:15,945 INFO L82 PathProgramCache]: Analyzing trace with hash 84143773, now seen corresponding path program 10 times [2018-10-22 15:50:15,945 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:15,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:15,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:15,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:15,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2018-10-22 15:50:24,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:24,835 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 15:50:24,842 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:24,907 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:24,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:24,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:25,069 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-22 15:50:25,070 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-22 15:50:25,071 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:50:25,073 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:25,078 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:25,079 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-22 15:50:25,105 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-22 15:50:25,146 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2018-10-22 15:50:25,148 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:50:25,159 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:50:25,170 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-22 15:50:25,171 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:32 [2018-10-22 15:50:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 391 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 15:50:25,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:25,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 36 [2018-10-22 15:50:25,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:50:25,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:50:25,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1148, Unknown=1, NotChecked=0, Total=1260 [2018-10-22 15:50:25,997 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 36 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown