java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/real-life/threadpooling_product.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:06:38,454 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:06:38,456 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:06:38,468 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:06:38,468 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:06:38,470 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:06:38,471 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:06:38,473 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:06:38,474 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:06:38,475 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:06:38,476 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 23:06:38,476 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 23:06:38,477 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 23:06:38,478 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 23:06:38,480 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 23:06:38,480 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 23:06:38,481 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 23:06:38,483 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 23:06:38,485 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 23:06:38,487 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 23:06:38,488 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 23:06:38,489 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 23:06:38,492 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 23:06:38,501 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:06:38,516 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:06:38,516 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:06:38,517 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:06:38,518 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:06:38,518 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:06:38,518 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:06:38,519 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:06:38,519 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:06:38,519 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:06:38,519 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:06:38,519 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:06:38,520 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:06:38,520 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:06:38,520 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:06:38,520 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:06:38,520 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:06:38,521 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:06:38,521 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:06:38,521 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:06:38,521 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:06:38,521 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:06:38,521 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:06:38,522 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:06:38,522 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:06:38,522 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:06:38,522 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:06:38,522 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:06:38,523 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:06:38,523 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:06:38,523 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:06:38,568 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:06:38,584 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:06:38,590 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:06:38,592 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:06:38,592 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:06:38,593 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product.bpl [2018-09-30 23:06:38,594 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product.bpl' [2018-09-30 23:06:38,668 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:06:38,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:06:38,673 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:06:38,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:06:38,673 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:06:38,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:38" (1/1) ... [2018-09-30 23:06:38,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:38" (1/1) ... [2018-09-30 23:06:38,716 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 23:06:38,716 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 23:06:38,717 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 23:06:38,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:06:38,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:06:38,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:06:38,720 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:06:38,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:38" (1/1) ... [2018-09-30 23:06:38,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:38" (1/1) ... [2018-09-30 23:06:38,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:38" (1/1) ... [2018-09-30 23:06:38,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:38" (1/1) ... [2018-09-30 23:06:38,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:38" (1/1) ... [2018-09-30 23:06:38,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:38" (1/1) ... [2018-09-30 23:06:38,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:38" (1/1) ... [2018-09-30 23:06:38,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:06:38,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:06:38,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:06:38,748 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:06:38,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:06:38,831 INFO L124 BoogieDeclarations]: Specification and implementation of procedure product given in one single declaration [2018-09-30 23:06:38,831 INFO L130 BoogieDeclarations]: Found specification of procedure product [2018-09-30 23:06:38,831 INFO L138 BoogieDeclarations]: Found implementation of procedure product [2018-09-30 23:06:39,283 INFO L345 CfgBuilder]: Using library mode [2018-09-30 23:06:39,284 INFO L202 PluginConnector]: Adding new model threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:06:39 BoogieIcfgContainer [2018-09-30 23:06:39,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:06:39,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:06:39,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:06:39,289 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:06:39,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:38" (1/2) ... [2018-09-30 23:06:39,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec621b7 and model type threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:06:39, skipping insertion in model container [2018-09-30 23:06:39,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:06:39" (2/2) ... [2018-09-30 23:06:39,292 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product.bpl [2018-09-30 23:06:39,302 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:06:39,312 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-30 23:06:39,363 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:06:39,363 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:06:39,364 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:06:39,364 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:06:39,364 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:06:39,364 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:06:39,364 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:06:39,365 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:06:39,365 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:06:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-09-30 23:06:39,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:06:39,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:39,388 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 23:06:39,389 INFO L423 AbstractCegarLoop]: === Iteration 1 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:39,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:39,396 INFO L82 PathProgramCache]: Analyzing trace with hash 28755683, now seen corresponding path program 1 times [2018-09-30 23:06:39,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:39,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:39,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:39,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:39,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:39,610 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:39,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:06:39,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:06:39,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:06:39,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:06:39,629 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2018-09-30 23:06:40,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:40,277 INFO L93 Difference]: Finished difference Result 49 states and 85 transitions. [2018-09-30 23:06:40,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:06:40,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 23:06:40,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:40,294 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:06:40,294 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:06:40,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:06:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:06:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-30 23:06:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:06:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2018-09-30 23:06:40,336 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 5 [2018-09-30 23:06:40,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:40,336 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2018-09-30 23:06:40,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:06:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2018-09-30 23:06:40,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:06:40,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:40,338 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 23:06:40,338 INFO L423 AbstractCegarLoop]: === Iteration 2 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:40,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:40,339 INFO L82 PathProgramCache]: Analyzing trace with hash 28971747, now seen corresponding path program 1 times [2018-09-30 23:06:40,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:40,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:40,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:40,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:40,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:40,390 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:40,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:06:40,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:06:40,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:06:40,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:06:40,393 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 5 states. [2018-09-30 23:06:40,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:40,699 INFO L93 Difference]: Finished difference Result 57 states and 99 transitions. [2018-09-30 23:06:40,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:06:40,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 23:06:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:40,702 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:06:40,703 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:06:40,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:06:40,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:06:40,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2018-09-30 23:06:40,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 23:06:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 63 transitions. [2018-09-30 23:06:40,714 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 63 transitions. Word has length 5 [2018-09-30 23:06:40,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:40,714 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 63 transitions. [2018-09-30 23:06:40,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:06:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 63 transitions. [2018-09-30 23:06:40,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:06:40,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:40,716 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:40,717 INFO L423 AbstractCegarLoop]: === Iteration 3 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:40,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:40,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1864688358, now seen corresponding path program 1 times [2018-09-30 23:06:40,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:40,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:40,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:40,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:40,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:40,988 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:40,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-30 23:06:40,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:06:40,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:06:40,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:06:40,991 INFO L87 Difference]: Start difference. First operand 38 states and 63 transitions. Second operand 7 states. [2018-09-30 23:06:42,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:42,229 INFO L93 Difference]: Finished difference Result 84 states and 147 transitions. [2018-09-30 23:06:42,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:06:42,230 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 23:06:42,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:42,233 INFO L225 Difference]: With dead ends: 84 [2018-09-30 23:06:42,233 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 23:06:42,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:06:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 23:06:42,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 51. [2018-09-30 23:06:42,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:06:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 86 transitions. [2018-09-30 23:06:42,247 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 86 transitions. Word has length 7 [2018-09-30 23:06:42,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:42,248 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 86 transitions. [2018-09-30 23:06:42,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:06:42,248 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 86 transitions. [2018-09-30 23:06:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:06:42,249 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:42,249 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-30 23:06:42,250 INFO L423 AbstractCegarLoop]: === Iteration 4 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:42,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:42,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1865765160, now seen corresponding path program 1 times [2018-09-30 23:06:42,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:42,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:42,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:42,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:42,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:42,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:42,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:42,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:42,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:42,556 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:06:42,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-30 23:06:42,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:06:42,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:06:42,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:06:42,559 INFO L87 Difference]: Start difference. First operand 51 states and 86 transitions. Second operand 9 states. [2018-09-30 23:06:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:43,477 INFO L93 Difference]: Finished difference Result 142 states and 245 transitions. [2018-09-30 23:06:43,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:06:43,477 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 7 [2018-09-30 23:06:43,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:43,479 INFO L225 Difference]: With dead ends: 142 [2018-09-30 23:06:43,479 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 23:06:43,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:06:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 23:06:43,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 73. [2018-09-30 23:06:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:06:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 120 transitions. [2018-09-30 23:06:43,498 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 120 transitions. Word has length 7 [2018-09-30 23:06:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:43,498 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 120 transitions. [2018-09-30 23:06:43,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:06:43,499 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 120 transitions. [2018-09-30 23:06:43,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:06:43,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:43,500 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:43,500 INFO L423 AbstractCegarLoop]: === Iteration 5 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:43,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:43,501 INFO L82 PathProgramCache]: Analyzing trace with hash 964893579, now seen corresponding path program 1 times [2018-09-30 23:06:43,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:43,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:43,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:43,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:43,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:43,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:43,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:43,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:43,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:43,701 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:06:43,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2018-09-30 23:06:43,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:06:43,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:06:43,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:06:43,702 INFO L87 Difference]: Start difference. First operand 73 states and 120 transitions. Second operand 11 states. [2018-09-30 23:06:44,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:44,405 INFO L93 Difference]: Finished difference Result 148 states and 240 transitions. [2018-09-30 23:06:44,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:06:44,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2018-09-30 23:06:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:44,407 INFO L225 Difference]: With dead ends: 148 [2018-09-30 23:06:44,407 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 23:06:44,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:06:44,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 23:06:44,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2018-09-30 23:06:44,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 23:06:44,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 119 transitions. [2018-09-30 23:06:44,429 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 119 transitions. Word has length 9 [2018-09-30 23:06:44,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:44,429 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 119 transitions. [2018-09-30 23:06:44,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:06:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 119 transitions. [2018-09-30 23:06:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:06:44,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:44,430 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:44,431 INFO L423 AbstractCegarLoop]: === Iteration 6 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:44,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:44,433 INFO L82 PathProgramCache]: Analyzing trace with hash 101966393, now seen corresponding path program 1 times [2018-09-30 23:06:44,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:44,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:44,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:44,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:44,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:44,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:44,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:44,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:44,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:44,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:44,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 23:06:44,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:06:44,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:06:44,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:06:44,793 INFO L87 Difference]: Start difference. First operand 78 states and 119 transitions. Second operand 14 states. [2018-09-30 23:06:45,072 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-09-30 23:06:45,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:45,712 INFO L93 Difference]: Finished difference Result 124 states and 193 transitions. [2018-09-30 23:06:45,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:06:45,713 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 23:06:45,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:45,714 INFO L225 Difference]: With dead ends: 124 [2018-09-30 23:06:45,714 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 23:06:45,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:06:45,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 23:06:45,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2018-09-30 23:06:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 23:06:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 173 transitions. [2018-09-30 23:06:45,735 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 173 transitions. Word has length 10 [2018-09-30 23:06:45,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:45,735 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 173 transitions. [2018-09-30 23:06:45,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:06:45,735 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 173 transitions. [2018-09-30 23:06:45,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:06:45,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:45,737 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:45,737 INFO L423 AbstractCegarLoop]: === Iteration 7 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:45,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:45,738 INFO L82 PathProgramCache]: Analyzing trace with hash 103259259, now seen corresponding path program 1 times [2018-09-30 23:06:45,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:45,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:45,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:45,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:45,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:45,903 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:45,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-30 23:06:45,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:06:45,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:06:45,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:06:45,904 INFO L87 Difference]: Start difference. First operand 107 states and 173 transitions. Second operand 8 states. [2018-09-30 23:06:46,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:46,468 INFO L93 Difference]: Finished difference Result 132 states and 203 transitions. [2018-09-30 23:06:46,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:06:46,470 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-30 23:06:46,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:46,471 INFO L225 Difference]: With dead ends: 132 [2018-09-30 23:06:46,471 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 23:06:46,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:06:46,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 23:06:46,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2018-09-30 23:06:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 23:06:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 196 transitions. [2018-09-30 23:06:46,494 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 196 transitions. Word has length 10 [2018-09-30 23:06:46,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:46,495 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 196 transitions. [2018-09-30 23:06:46,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:06:46,495 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 196 transitions. [2018-09-30 23:06:46,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:06:46,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:46,496 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:46,497 INFO L423 AbstractCegarLoop]: === Iteration 8 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:46,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:46,497 INFO L82 PathProgramCache]: Analyzing trace with hash -176034144, now seen corresponding path program 1 times [2018-09-30 23:06:46,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:46,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:46,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:46,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:46,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:46,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:46,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:46,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:46,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:47,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:47,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 23:06:47,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:06:47,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:06:47,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:06:47,097 INFO L87 Difference]: Start difference. First operand 121 states and 196 transitions. Second operand 14 states. [2018-09-30 23:06:48,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:48,891 INFO L93 Difference]: Finished difference Result 162 states and 262 transitions. [2018-09-30 23:06:48,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:06:48,892 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 23:06:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:48,893 INFO L225 Difference]: With dead ends: 162 [2018-09-30 23:06:48,893 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 23:06:48,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:06:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 23:06:48,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2018-09-30 23:06:48,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 23:06:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 209 transitions. [2018-09-30 23:06:48,916 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 209 transitions. Word has length 10 [2018-09-30 23:06:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:48,916 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 209 transitions. [2018-09-30 23:06:48,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:06:48,916 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 209 transitions. [2018-09-30 23:06:48,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:06:48,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:48,919 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:48,919 INFO L423 AbstractCegarLoop]: === Iteration 9 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:48,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:48,919 INFO L82 PathProgramCache]: Analyzing trace with hash -176034432, now seen corresponding path program 1 times [2018-09-30 23:06:48,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:48,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:48,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:48,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:48,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:48,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:48,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:48,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:49,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:49,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:49,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-09-30 23:06:49,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:06:49,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:06:49,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:06:49,157 INFO L87 Difference]: Start difference. First operand 129 states and 209 transitions. Second operand 13 states. [2018-09-30 23:06:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:51,073 INFO L93 Difference]: Finished difference Result 223 states and 343 transitions. [2018-09-30 23:06:51,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:06:51,073 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2018-09-30 23:06:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:51,074 INFO L225 Difference]: With dead ends: 223 [2018-09-30 23:06:51,074 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 23:06:51,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:06:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 23:06:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 167. [2018-09-30 23:06:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 23:06:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 274 transitions. [2018-09-30 23:06:51,102 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 274 transitions. Word has length 10 [2018-09-30 23:06:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:51,102 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 274 transitions. [2018-09-30 23:06:51,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:06:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 274 transitions. [2018-09-30 23:06:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:06:51,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:51,104 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:51,104 INFO L423 AbstractCegarLoop]: === Iteration 10 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:51,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:51,104 INFO L82 PathProgramCache]: Analyzing trace with hash -184622601, now seen corresponding path program 1 times [2018-09-30 23:06:51,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:51,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:51,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:51,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:51,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:51,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:51,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:51,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:51,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:51,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:51,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 23:06:51,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:06:51,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:06:51,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:06:51,350 INFO L87 Difference]: Start difference. First operand 167 states and 274 transitions. Second operand 14 states. [2018-09-30 23:06:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:52,687 INFO L93 Difference]: Finished difference Result 222 states and 351 transitions. [2018-09-30 23:06:52,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:06:52,693 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 23:06:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:52,694 INFO L225 Difference]: With dead ends: 222 [2018-09-30 23:06:52,695 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 23:06:52,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:06:52,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 23:06:52,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 181. [2018-09-30 23:06:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 23:06:52,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 297 transitions. [2018-09-30 23:06:52,723 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 297 transitions. Word has length 10 [2018-09-30 23:06:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:52,723 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 297 transitions. [2018-09-30 23:06:52,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:06:52,723 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 297 transitions. [2018-09-30 23:06:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:06:52,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:52,724 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:52,724 INFO L423 AbstractCegarLoop]: === Iteration 11 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:52,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:52,725 INFO L82 PathProgramCache]: Analyzing trace with hash -184621319, now seen corresponding path program 1 times [2018-09-30 23:06:52,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:52,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:52,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:52,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:52,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:52,895 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:52,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-30 23:06:52,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:06:52,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:06:52,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:06:52,896 INFO L87 Difference]: Start difference. First operand 181 states and 297 transitions. Second operand 8 states. [2018-09-30 23:06:53,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:53,361 INFO L93 Difference]: Finished difference Result 203 states and 320 transitions. [2018-09-30 23:06:53,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:06:53,363 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-30 23:06:53,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:53,364 INFO L225 Difference]: With dead ends: 203 [2018-09-30 23:06:53,364 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 23:06:53,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:06:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 23:06:53,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2018-09-30 23:06:53,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 23:06:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 301 transitions. [2018-09-30 23:06:53,393 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 301 transitions. Word has length 10 [2018-09-30 23:06:53,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:53,393 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 301 transitions. [2018-09-30 23:06:53,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:06:53,393 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 301 transitions. [2018-09-30 23:06:53,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:06:53,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:53,394 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:53,395 INFO L423 AbstractCegarLoop]: === Iteration 12 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:53,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:53,395 INFO L82 PathProgramCache]: Analyzing trace with hash -973282432, now seen corresponding path program 1 times [2018-09-30 23:06:53,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:53,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:53,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:53,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:53,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:53,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:53,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-30 23:06:53,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:53,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:53,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:53,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 23:06:53,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:06:53,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:06:53,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:06:53,666 INFO L87 Difference]: Start difference. First operand 183 states and 301 transitions. Second operand 14 states. [2018-09-30 23:06:54,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:54,796 INFO L93 Difference]: Finished difference Result 241 states and 385 transitions. [2018-09-30 23:06:54,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:06:54,797 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 23:06:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:54,798 INFO L225 Difference]: With dead ends: 241 [2018-09-30 23:06:54,798 INFO L226 Difference]: Without dead ends: 240 [2018-09-30 23:06:54,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:06:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-09-30 23:06:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2018-09-30 23:06:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-30 23:06:54,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 336 transitions. [2018-09-30 23:06:54,825 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 336 transitions. Word has length 10 [2018-09-30 23:06:54,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:54,825 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 336 transitions. [2018-09-30 23:06:54,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:06:54,825 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 336 transitions. [2018-09-30 23:06:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:06:54,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:54,826 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:54,826 INFO L423 AbstractCegarLoop]: === Iteration 13 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:54,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:54,827 INFO L82 PathProgramCache]: Analyzing trace with hash -973281662, now seen corresponding path program 1 times [2018-09-30 23:06:54,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:54,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:54,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:54,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:54,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:54,968 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:54,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-30 23:06:54,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:06:54,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:06:54,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:06:54,969 INFO L87 Difference]: Start difference. First operand 202 states and 336 transitions. Second operand 8 states. [2018-09-30 23:06:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:55,299 INFO L93 Difference]: Finished difference Result 220 states and 353 transitions. [2018-09-30 23:06:55,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:06:55,299 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-30 23:06:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:55,301 INFO L225 Difference]: With dead ends: 220 [2018-09-30 23:06:55,301 INFO L226 Difference]: Without dead ends: 218 [2018-09-30 23:06:55,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:06:55,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-30 23:06:55,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2018-09-30 23:06:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-30 23:06:55,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 348 transitions. [2018-09-30 23:06:55,326 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 348 transitions. Word has length 10 [2018-09-30 23:06:55,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:55,326 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 348 transitions. [2018-09-30 23:06:55,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:06:55,326 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 348 transitions. [2018-09-30 23:06:55,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:06:55,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:55,327 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:55,327 INFO L423 AbstractCegarLoop]: === Iteration 14 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:55,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:55,328 INFO L82 PathProgramCache]: Analyzing trace with hash -981870601, now seen corresponding path program 1 times [2018-09-30 23:06:55,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:55,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:55,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:55,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:55,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:55,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:55,416 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-30 23:06:55,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:55,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:55,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:55,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-09-30 23:06:55,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:06:55,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:06:55,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:06:55,550 INFO L87 Difference]: Start difference. First operand 210 states and 348 transitions. Second operand 13 states. [2018-09-30 23:06:56,735 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-09-30 23:06:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:57,202 INFO L93 Difference]: Finished difference Result 320 states and 507 transitions. [2018-09-30 23:06:57,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:06:57,203 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2018-09-30 23:06:57,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:57,205 INFO L225 Difference]: With dead ends: 320 [2018-09-30 23:06:57,205 INFO L226 Difference]: Without dead ends: 318 [2018-09-30 23:06:57,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:06:57,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-09-30 23:06:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2018-09-30 23:06:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 23:06:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 430 transitions. [2018-09-30 23:06:57,237 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 430 transitions. Word has length 10 [2018-09-30 23:06:57,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:57,237 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 430 transitions. [2018-09-30 23:06:57,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:06:57,237 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 430 transitions. [2018-09-30 23:06:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:06:57,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:57,237 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:57,238 INFO L423 AbstractCegarLoop]: === Iteration 15 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:57,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:57,238 INFO L82 PathProgramCache]: Analyzing trace with hash -981870889, now seen corresponding path program 1 times [2018-09-30 23:06:57,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:57,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:57,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:57,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:57,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:57,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:57,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-30 23:06:57,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:57,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:57,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:57,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 23:06:57,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:06:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:06:57,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:06:57,508 INFO L87 Difference]: Start difference. First operand 259 states and 430 transitions. Second operand 14 states. [2018-09-30 23:06:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:58,012 INFO L93 Difference]: Finished difference Result 304 states and 503 transitions. [2018-09-30 23:06:58,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:06:58,012 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 23:06:58,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:58,014 INFO L225 Difference]: With dead ends: 304 [2018-09-30 23:06:58,014 INFO L226 Difference]: Without dead ends: 302 [2018-09-30 23:06:58,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:06:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-09-30 23:06:58,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 270. [2018-09-30 23:06:58,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-09-30 23:06:58,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 448 transitions. [2018-09-30 23:06:58,050 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 448 transitions. Word has length 10 [2018-09-30 23:06:58,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:58,051 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 448 transitions. [2018-09-30 23:06:58,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:06:58,051 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 448 transitions. [2018-09-30 23:06:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:06:58,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:58,052 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:58,052 INFO L423 AbstractCegarLoop]: === Iteration 16 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:58,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:58,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1101306322, now seen corresponding path program 1 times [2018-09-30 23:06:58,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:58,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:58,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:58,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:58,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:58,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:58,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-30 23:06:58,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:58,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:58,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:58,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 23:06:58,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:06:58,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:06:58,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:06:58,508 INFO L87 Difference]: Start difference. First operand 270 states and 448 transitions. Second operand 14 states. [2018-09-30 23:06:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:58,975 INFO L93 Difference]: Finished difference Result 281 states and 455 transitions. [2018-09-30 23:06:58,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:06:58,975 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 23:06:58,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:58,977 INFO L225 Difference]: With dead ends: 281 [2018-09-30 23:06:58,977 INFO L226 Difference]: Without dead ends: 280 [2018-09-30 23:06:58,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:06:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-09-30 23:06:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 270. [2018-09-30 23:06:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-09-30 23:06:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 447 transitions. [2018-09-30 23:06:59,016 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 447 transitions. Word has length 10 [2018-09-30 23:06:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:59,016 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 447 transitions. [2018-09-30 23:06:59,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:06:59,017 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 447 transitions. [2018-09-30 23:06:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:06:59,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:59,017 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:59,018 INFO L423 AbstractCegarLoop]: === Iteration 17 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:59,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:59,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1102106644, now seen corresponding path program 1 times [2018-09-30 23:06:59,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:59,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:59,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:59,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:59,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:59,416 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 7 [2018-09-30 23:06:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:59,430 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:59,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-30 23:06:59,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:06:59,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:06:59,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:06:59,431 INFO L87 Difference]: Start difference. First operand 270 states and 447 transitions. Second operand 8 states. [2018-09-30 23:06:59,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:59,791 INFO L93 Difference]: Finished difference Result 286 states and 460 transitions. [2018-09-30 23:06:59,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:06:59,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-30 23:06:59,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:59,793 INFO L225 Difference]: With dead ends: 286 [2018-09-30 23:06:59,793 INFO L226 Difference]: Without dead ends: 284 [2018-09-30 23:06:59,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:06:59,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2018-09-30 23:06:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 268. [2018-09-30 23:06:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-09-30 23:06:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 443 transitions. [2018-09-30 23:06:59,837 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 443 transitions. Word has length 10 [2018-09-30 23:06:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:59,837 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 443 transitions. [2018-09-30 23:06:59,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:06:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 443 transitions. [2018-09-30 23:06:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:06:59,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:59,838 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:59,839 INFO L423 AbstractCegarLoop]: === Iteration 18 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:59,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:59,839 INFO L82 PathProgramCache]: Analyzing trace with hash 240543358, now seen corresponding path program 1 times [2018-09-30 23:06:59,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:59,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:59,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:59,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:59,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:00,757 WARN L178 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-09-30 23:07:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:00,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:00,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-30 23:07:00,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:00,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:01,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:01,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2018-09-30 23:07:01,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:07:01,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:07:01,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:07:01,147 INFO L87 Difference]: Start difference. First operand 268 states and 443 transitions. Second operand 16 states. [2018-09-30 23:07:01,890 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2018-09-30 23:07:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:03,764 INFO L93 Difference]: Finished difference Result 515 states and 842 transitions. [2018-09-30 23:07:03,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:07:03,765 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-09-30 23:07:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:03,767 INFO L225 Difference]: With dead ends: 515 [2018-09-30 23:07:03,767 INFO L226 Difference]: Without dead ends: 513 [2018-09-30 23:07:03,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:07:03,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2018-09-30 23:07:03,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 338. [2018-09-30 23:07:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-09-30 23:07:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 568 transitions. [2018-09-30 23:07:03,819 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 568 transitions. Word has length 12 [2018-09-30 23:07:03,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:03,820 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 568 transitions. [2018-09-30 23:07:03,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:07:03,820 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 568 transitions. [2018-09-30 23:07:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:07:03,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:03,821 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:03,821 INFO L423 AbstractCegarLoop]: === Iteration 19 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:03,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:03,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1525011273, now seen corresponding path program 1 times [2018-09-30 23:07:03,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:03,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:03,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:03,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:03,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:04,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:04,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:04,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:04,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:04,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:04,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2018-09-30 23:07:04,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:07:04,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:07:04,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:07:04,395 INFO L87 Difference]: Start difference. First operand 338 states and 568 transitions. Second operand 16 states. [2018-09-30 23:07:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:05,816 INFO L93 Difference]: Finished difference Result 631 states and 1050 transitions. [2018-09-30 23:07:05,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:07:05,816 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-09-30 23:07:05,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:05,819 INFO L225 Difference]: With dead ends: 631 [2018-09-30 23:07:05,819 INFO L226 Difference]: Without dead ends: 629 [2018-09-30 23:07:05,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:07:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2018-09-30 23:07:05,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 403. [2018-09-30 23:07:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-09-30 23:07:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 685 transitions. [2018-09-30 23:07:05,900 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 685 transitions. Word has length 12 [2018-09-30 23:07:05,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:05,901 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 685 transitions. [2018-09-30 23:07:05,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:07:05,901 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 685 transitions. [2018-09-30 23:07:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:07:05,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:05,902 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:05,902 INFO L423 AbstractCegarLoop]: === Iteration 20 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:05,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:05,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1000080215, now seen corresponding path program 1 times [2018-09-30 23:07:05,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:05,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:05,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:05,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:05,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:06,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:06,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:06,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:06,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:06,170 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:07:06,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-30 23:07:06,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:07:06,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:07:06,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:07:06,171 INFO L87 Difference]: Start difference. First operand 403 states and 685 transitions. Second operand 14 states. [2018-09-30 23:07:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:08,103 INFO L93 Difference]: Finished difference Result 1330 states and 2225 transitions. [2018-09-30 23:07:08,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:07:08,104 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 23:07:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:08,107 INFO L225 Difference]: With dead ends: 1330 [2018-09-30 23:07:08,107 INFO L226 Difference]: Without dead ends: 929 [2018-09-30 23:07:08,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=660, Invalid=3122, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:07:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2018-09-30 23:07:08,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 694. [2018-09-30 23:07:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2018-09-30 23:07:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1171 transitions. [2018-09-30 23:07:08,235 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1171 transitions. Word has length 13 [2018-09-30 23:07:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:08,235 INFO L480 AbstractCegarLoop]: Abstraction has 694 states and 1171 transitions. [2018-09-30 23:07:08,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:07:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1171 transitions. [2018-09-30 23:07:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:07:08,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:08,236 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:08,237 INFO L423 AbstractCegarLoop]: === Iteration 21 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:08,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:08,237 INFO L82 PathProgramCache]: Analyzing trace with hash -86603521, now seen corresponding path program 1 times [2018-09-30 23:07:08,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:08,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:08,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:08,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:08,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:08,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:08,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:08,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:08,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:08,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:08,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-30 23:07:08,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:07:08,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:07:08,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:07:08,553 INFO L87 Difference]: Start difference. First operand 694 states and 1171 transitions. Second operand 14 states. [2018-09-30 23:07:09,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:09,812 INFO L93 Difference]: Finished difference Result 1557 states and 2604 transitions. [2018-09-30 23:07:09,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:07:09,813 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 23:07:09,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:09,816 INFO L225 Difference]: With dead ends: 1557 [2018-09-30 23:07:09,816 INFO L226 Difference]: Without dead ends: 864 [2018-09-30 23:07:09,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:07:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2018-09-30 23:07:09,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 741. [2018-09-30 23:07:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2018-09-30 23:07:09,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1247 transitions. [2018-09-30 23:07:09,964 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1247 transitions. Word has length 13 [2018-09-30 23:07:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:09,964 INFO L480 AbstractCegarLoop]: Abstraction has 741 states and 1247 transitions. [2018-09-30 23:07:09,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:07:09,964 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1247 transitions. [2018-09-30 23:07:09,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:07:09,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:09,965 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:09,965 INFO L423 AbstractCegarLoop]: === Iteration 22 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:09,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:09,966 INFO L82 PathProgramCache]: Analyzing trace with hash -63701769, now seen corresponding path program 1 times [2018-09-30 23:07:09,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:09,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:09,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:09,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:09,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:10,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:10,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:10,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:10,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:10,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:10,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2018-09-30 23:07:10,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:07:10,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:07:10,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:10,260 INFO L87 Difference]: Start difference. First operand 741 states and 1247 transitions. Second operand 13 states. [2018-09-30 23:07:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:11,235 INFO L93 Difference]: Finished difference Result 1655 states and 2757 transitions. [2018-09-30 23:07:11,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:07:11,236 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 23:07:11,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:11,240 INFO L225 Difference]: With dead ends: 1655 [2018-09-30 23:07:11,240 INFO L226 Difference]: Without dead ends: 915 [2018-09-30 23:07:11,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:07:11,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-09-30 23:07:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 809. [2018-09-30 23:07:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2018-09-30 23:07:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1353 transitions. [2018-09-30 23:07:11,386 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1353 transitions. Word has length 13 [2018-09-30 23:07:11,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:11,386 INFO L480 AbstractCegarLoop]: Abstraction has 809 states and 1353 transitions. [2018-09-30 23:07:11,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:07:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1353 transitions. [2018-09-30 23:07:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:07:11,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:11,387 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:11,387 INFO L423 AbstractCegarLoop]: === Iteration 23 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:11,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:11,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1761298639, now seen corresponding path program 1 times [2018-09-30 23:07:11,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:11,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:11,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:11,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:11,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:11,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:11,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:11,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:11,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:11,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:11,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-09-30 23:07:11,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:07:11,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:07:11,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:07:11,619 INFO L87 Difference]: Start difference. First operand 809 states and 1353 transitions. Second operand 10 states. [2018-09-30 23:07:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:12,367 INFO L93 Difference]: Finished difference Result 939 states and 1541 transitions. [2018-09-30 23:07:12,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:07:12,368 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-09-30 23:07:12,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:12,371 INFO L225 Difference]: With dead ends: 939 [2018-09-30 23:07:12,371 INFO L226 Difference]: Without dead ends: 937 [2018-09-30 23:07:12,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:07:12,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2018-09-30 23:07:12,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 820. [2018-09-30 23:07:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-09-30 23:07:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1367 transitions. [2018-09-30 23:07:12,509 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1367 transitions. Word has length 13 [2018-09-30 23:07:12,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:12,509 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 1367 transitions. [2018-09-30 23:07:12,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:07:12,509 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1367 transitions. [2018-09-30 23:07:12,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:07:12,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:12,510 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:12,510 INFO L423 AbstractCegarLoop]: === Iteration 24 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:12,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:12,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1799471129, now seen corresponding path program 1 times [2018-09-30 23:07:12,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:12,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:12,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:12,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:12,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:12,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:12,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:12,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:12,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:12,995 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:07:12,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-30 23:07:12,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:07:12,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:07:12,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:07:12,996 INFO L87 Difference]: Start difference. First operand 820 states and 1367 transitions. Second operand 14 states. [2018-09-30 23:07:15,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:15,012 INFO L93 Difference]: Finished difference Result 2058 states and 3403 transitions. [2018-09-30 23:07:15,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:07:15,013 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 23:07:15,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:15,018 INFO L225 Difference]: With dead ends: 2058 [2018-09-30 23:07:15,018 INFO L226 Difference]: Without dead ends: 1239 [2018-09-30 23:07:15,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=436, Invalid=2426, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:07:15,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2018-09-30 23:07:15,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 899. [2018-09-30 23:07:15,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2018-09-30 23:07:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1500 transitions. [2018-09-30 23:07:15,252 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1500 transitions. Word has length 13 [2018-09-30 23:07:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:15,252 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 1500 transitions. [2018-09-30 23:07:15,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:07:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1500 transitions. [2018-09-30 23:07:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:07:15,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:15,253 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:15,254 INFO L423 AbstractCegarLoop]: === Iteration 25 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:15,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:15,254 INFO L82 PathProgramCache]: Analyzing trace with hash 267374077, now seen corresponding path program 1 times [2018-09-30 23:07:15,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:15,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:15,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:15,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:15,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:15,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:15,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:15,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:15,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:16,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:16,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-09-30 23:07:16,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:07:16,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:07:16,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:07:16,324 INFO L87 Difference]: Start difference. First operand 899 states and 1500 transitions. Second operand 10 states. [2018-09-30 23:07:17,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:17,601 INFO L93 Difference]: Finished difference Result 1038 states and 1712 transitions. [2018-09-30 23:07:17,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:07:17,601 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-09-30 23:07:17,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:17,606 INFO L225 Difference]: With dead ends: 1038 [2018-09-30 23:07:17,606 INFO L226 Difference]: Without dead ends: 1036 [2018-09-30 23:07:17,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:07:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2018-09-30 23:07:17,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 897. [2018-09-30 23:07:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2018-09-30 23:07:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1498 transitions. [2018-09-30 23:07:17,778 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1498 transitions. Word has length 13 [2018-09-30 23:07:17,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:17,778 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1498 transitions. [2018-09-30 23:07:17,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:07:17,778 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1498 transitions. [2018-09-30 23:07:17,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:07:17,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:17,779 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:17,779 INFO L423 AbstractCegarLoop]: === Iteration 26 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:17,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:17,779 INFO L82 PathProgramCache]: Analyzing trace with hash 290277111, now seen corresponding path program 1 times [2018-09-30 23:07:17,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:17,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:17,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:17,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:17,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:17,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:17,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:17,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:17,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:18,003 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:07:18,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-30 23:07:18,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:07:18,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:07:18,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:07:18,004 INFO L87 Difference]: Start difference. First operand 897 states and 1498 transitions. Second operand 14 states. [2018-09-30 23:07:18,276 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-09-30 23:07:20,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:20,535 INFO L93 Difference]: Finished difference Result 2193 states and 3616 transitions. [2018-09-30 23:07:20,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:07:20,535 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 23:07:20,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:20,539 INFO L225 Difference]: With dead ends: 2193 [2018-09-30 23:07:20,540 INFO L226 Difference]: Without dead ends: 1286 [2018-09-30 23:07:20,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=445, Invalid=2525, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:07:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2018-09-30 23:07:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 995. [2018-09-30 23:07:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 995 states. [2018-09-30 23:07:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1646 transitions. [2018-09-30 23:07:20,731 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1646 transitions. Word has length 13 [2018-09-30 23:07:20,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:20,731 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 1646 transitions. [2018-09-30 23:07:20,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:07:20,731 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1646 transitions. [2018-09-30 23:07:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:07:20,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:20,732 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:20,732 INFO L423 AbstractCegarLoop]: === Iteration 27 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:20,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:20,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2115278289, now seen corresponding path program 1 times [2018-09-30 23:07:20,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:20,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:20,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:20,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:20,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:20,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:20,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:20,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:20,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:21,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:21,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-30 23:07:21,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:07:21,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:07:21,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:07:21,056 INFO L87 Difference]: Start difference. First operand 995 states and 1646 transitions. Second operand 14 states. [2018-09-30 23:07:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:22,270 INFO L93 Difference]: Finished difference Result 2165 states and 3551 transitions. [2018-09-30 23:07:22,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:07:22,271 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 23:07:22,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:22,276 INFO L225 Difference]: With dead ends: 2165 [2018-09-30 23:07:22,276 INFO L226 Difference]: Without dead ends: 1153 [2018-09-30 23:07:22,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:07:22,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2018-09-30 23:07:22,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1001. [2018-09-30 23:07:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2018-09-30 23:07:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1642 transitions. [2018-09-30 23:07:22,470 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1642 transitions. Word has length 13 [2018-09-30 23:07:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:22,470 INFO L480 AbstractCegarLoop]: Abstraction has 1001 states and 1642 transitions. [2018-09-30 23:07:22,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:07:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1642 transitions. [2018-09-30 23:07:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:07:22,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:22,471 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:22,472 INFO L423 AbstractCegarLoop]: === Iteration 28 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:22,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:22,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2141517287, now seen corresponding path program 1 times [2018-09-30 23:07:22,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:22,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:22,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:22,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:22,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:22,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:22,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:22,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:22,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:22,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:22,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2018-09-30 23:07:22,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:07:22,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:07:22,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:22,718 INFO L87 Difference]: Start difference. First operand 1001 states and 1642 transitions. Second operand 13 states. [2018-09-30 23:07:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:24,452 INFO L93 Difference]: Finished difference Result 1397 states and 2244 transitions. [2018-09-30 23:07:24,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:07:24,453 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 23:07:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:24,456 INFO L225 Difference]: With dead ends: 1397 [2018-09-30 23:07:24,456 INFO L226 Difference]: Without dead ends: 1125 [2018-09-30 23:07:24,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:07:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-30 23:07:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 995. [2018-09-30 23:07:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 995 states. [2018-09-30 23:07:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1627 transitions. [2018-09-30 23:07:24,631 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1627 transitions. Word has length 13 [2018-09-30 23:07:24,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:24,631 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 1627 transitions. [2018-09-30 23:07:24,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:07:24,631 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1627 transitions. [2018-09-30 23:07:24,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:07:24,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:24,632 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:24,632 INFO L423 AbstractCegarLoop]: === Iteration 29 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:24,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:24,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2129075237, now seen corresponding path program 1 times [2018-09-30 23:07:24,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:24,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:24,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:24,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:24,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:24,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:24,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:24,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:24,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:24,840 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:07:24,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-30 23:07:24,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:07:24,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:07:24,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:07:24,841 INFO L87 Difference]: Start difference. First operand 995 states and 1627 transitions. Second operand 14 states. [2018-09-30 23:07:27,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:27,076 INFO L93 Difference]: Finished difference Result 2724 states and 4397 transitions. [2018-09-30 23:07:27,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:07:27,076 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 23:07:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:27,082 INFO L225 Difference]: With dead ends: 2724 [2018-09-30 23:07:27,082 INFO L226 Difference]: Without dead ends: 1719 [2018-09-30 23:07:27,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=660, Invalid=3122, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:07:27,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2018-09-30 23:07:27,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1241. [2018-09-30 23:07:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1241 states. [2018-09-30 23:07:27,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2017 transitions. [2018-09-30 23:07:27,318 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2017 transitions. Word has length 13 [2018-09-30 23:07:27,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:27,318 INFO L480 AbstractCegarLoop]: Abstraction has 1241 states and 2017 transitions. [2018-09-30 23:07:27,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:07:27,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2017 transitions. [2018-09-30 23:07:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:07:27,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:27,319 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:27,320 INFO L423 AbstractCegarLoop]: === Iteration 30 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:27,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:27,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1374164806, now seen corresponding path program 1 times [2018-09-30 23:07:27,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:27,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:27,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:27,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:27,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:27,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:27,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:27,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:27,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:27,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:27,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2018-09-30 23:07:27,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:07:27,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:07:27,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:27,587 INFO L87 Difference]: Start difference. First operand 1241 states and 2017 transitions. Second operand 15 states. [2018-09-30 23:07:29,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:29,008 INFO L93 Difference]: Finished difference Result 1442 states and 2324 transitions. [2018-09-30 23:07:29,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:07:29,009 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 23:07:29,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:29,015 INFO L225 Difference]: With dead ends: 1442 [2018-09-30 23:07:29,015 INFO L226 Difference]: Without dead ends: 1440 [2018-09-30 23:07:29,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:07:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2018-09-30 23:07:29,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1225. [2018-09-30 23:07:29,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2018-09-30 23:07:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1983 transitions. [2018-09-30 23:07:29,251 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1983 transitions. Word has length 15 [2018-09-30 23:07:29,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:29,251 INFO L480 AbstractCegarLoop]: Abstraction has 1225 states and 1983 transitions. [2018-09-30 23:07:29,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:07:29,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1983 transitions. [2018-09-30 23:07:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:07:29,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:29,252 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:29,252 INFO L423 AbstractCegarLoop]: === Iteration 31 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:29,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:29,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1511389740, now seen corresponding path program 1 times [2018-09-30 23:07:29,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:29,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:29,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:29,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:29,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:30,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:30,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:30,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:30,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:30,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:30,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2018-09-30 23:07:30,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:07:30,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:07:30,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:07:30,155 INFO L87 Difference]: Start difference. First operand 1225 states and 1983 transitions. Second operand 12 states. [2018-09-30 23:07:31,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:31,250 INFO L93 Difference]: Finished difference Result 1389 states and 2225 transitions. [2018-09-30 23:07:31,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:07:31,251 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-09-30 23:07:31,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:31,255 INFO L225 Difference]: With dead ends: 1389 [2018-09-30 23:07:31,255 INFO L226 Difference]: Without dead ends: 1387 [2018-09-30 23:07:31,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:07:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2018-09-30 23:07:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1211. [2018-09-30 23:07:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2018-09-30 23:07:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1953 transitions. [2018-09-30 23:07:31,493 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1953 transitions. Word has length 15 [2018-09-30 23:07:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:31,493 INFO L480 AbstractCegarLoop]: Abstraction has 1211 states and 1953 transitions. [2018-09-30 23:07:31,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:07:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1953 transitions. [2018-09-30 23:07:31,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:07:31,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:31,494 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:31,495 INFO L423 AbstractCegarLoop]: === Iteration 32 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:31,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:31,496 INFO L82 PathProgramCache]: Analyzing trace with hash -593242831, now seen corresponding path program 1 times [2018-09-30 23:07:31,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:31,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:31,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:31,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:31,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:31,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:31,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:31,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:31,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:31,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:31,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2018-09-30 23:07:31,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:07:31,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:07:31,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:07:31,895 INFO L87 Difference]: Start difference. First operand 1211 states and 1953 transitions. Second operand 14 states. [2018-09-30 23:07:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:33,604 INFO L93 Difference]: Finished difference Result 1445 states and 2303 transitions. [2018-09-30 23:07:33,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:07:33,604 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2018-09-30 23:07:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:33,610 INFO L225 Difference]: With dead ends: 1445 [2018-09-30 23:07:33,611 INFO L226 Difference]: Without dead ends: 1443 [2018-09-30 23:07:33,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:07:33,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2018-09-30 23:07:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1205. [2018-09-30 23:07:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-30 23:07:33,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-30 23:07:33,859 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-30 23:07:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:33,859 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-30 23:07:33,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:07:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-30 23:07:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:07:33,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:33,860 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:33,860 INFO L423 AbstractCegarLoop]: === Iteration 33 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:33,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:33,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1223170690, now seen corresponding path program 1 times [2018-09-30 23:07:33,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:33,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:33,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:33,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:33,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:33,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:33,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:33,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:33,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:34,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:34,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-09-30 23:07:34,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:07:34,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:07:34,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:07:34,128 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 12 states. [2018-09-30 23:07:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:35,766 INFO L93 Difference]: Finished difference Result 1420 states and 2265 transitions. [2018-09-30 23:07:35,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:07:35,766 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-09-30 23:07:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:35,771 INFO L225 Difference]: With dead ends: 1420 [2018-09-30 23:07:35,771 INFO L226 Difference]: Without dead ends: 1418 [2018-09-30 23:07:35,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:07:35,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2018-09-30 23:07:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1213. [2018-09-30 23:07:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1213 states. [2018-09-30 23:07:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1951 transitions. [2018-09-30 23:07:36,016 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1951 transitions. Word has length 16 [2018-09-30 23:07:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:36,017 INFO L480 AbstractCegarLoop]: Abstraction has 1213 states and 1951 transitions. [2018-09-30 23:07:36,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:07:36,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1951 transitions. [2018-09-30 23:07:36,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:07:36,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:36,018 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:36,018 INFO L423 AbstractCegarLoop]: === Iteration 34 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:36,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:36,018 INFO L82 PathProgramCache]: Analyzing trace with hash -767609008, now seen corresponding path program 2 times [2018-09-30 23:07:36,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:36,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:36,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:36,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:36,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:36,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:36,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:36,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:07:36,122 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:07:36,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:07:36,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:36,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:36,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-30 23:07:36,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:07:36,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:07:36,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:07:36,197 INFO L87 Difference]: Start difference. First operand 1213 states and 1951 transitions. Second operand 11 states. [2018-09-30 23:07:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:37,109 INFO L93 Difference]: Finished difference Result 1334 states and 2129 transitions. [2018-09-30 23:07:37,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:07:37,110 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-09-30 23:07:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:37,115 INFO L225 Difference]: With dead ends: 1334 [2018-09-30 23:07:37,115 INFO L226 Difference]: Without dead ends: 1332 [2018-09-30 23:07:37,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:07:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2018-09-30 23:07:37,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1205. [2018-09-30 23:07:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-30 23:07:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-30 23:07:37,365 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-30 23:07:37,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:37,365 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-30 23:07:37,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:07:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-30 23:07:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:07:37,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:37,366 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:37,367 INFO L423 AbstractCegarLoop]: === Iteration 35 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:37,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:37,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1823106549, now seen corresponding path program 1 times [2018-09-30 23:07:37,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:37,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:37,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:37,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:07:37,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:37,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:37,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:37,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:37,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:37,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:37,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-30 23:07:37,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:07:37,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:07:37,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:07:37,565 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 11 states. [2018-09-30 23:07:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:38,383 INFO L93 Difference]: Finished difference Result 1330 states and 2118 transitions. [2018-09-30 23:07:38,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:07:38,383 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-09-30 23:07:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:38,389 INFO L225 Difference]: With dead ends: 1330 [2018-09-30 23:07:38,389 INFO L226 Difference]: Without dead ends: 1328 [2018-09-30 23:07:38,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:07:38,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2018-09-30 23:07:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1211. [2018-09-30 23:07:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2018-09-30 23:07:38,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1948 transitions. [2018-09-30 23:07:38,627 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1948 transitions. Word has length 16 [2018-09-30 23:07:38,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:38,628 INFO L480 AbstractCegarLoop]: Abstraction has 1211 states and 1948 transitions. [2018-09-30 23:07:38,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:07:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1948 transitions. [2018-09-30 23:07:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:07:38,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:38,629 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:38,629 INFO L423 AbstractCegarLoop]: === Iteration 36 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:38,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:38,630 INFO L82 PathProgramCache]: Analyzing trace with hash 481081049, now seen corresponding path program 2 times [2018-09-30 23:07:38,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:38,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:38,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:38,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:38,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:38,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:38,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:38,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:07:38,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:07:38,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:07:38,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:38,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:38,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-09-30 23:07:38,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:07:38,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:07:38,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:07:38,822 INFO L87 Difference]: Start difference. First operand 1211 states and 1948 transitions. Second operand 12 states. [2018-09-30 23:07:40,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:40,327 INFO L93 Difference]: Finished difference Result 1430 states and 2273 transitions. [2018-09-30 23:07:40,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:07:40,327 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-09-30 23:07:40,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:40,331 INFO L225 Difference]: With dead ends: 1430 [2018-09-30 23:07:40,331 INFO L226 Difference]: Without dead ends: 1428 [2018-09-30 23:07:40,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:07:40,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2018-09-30 23:07:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1205. [2018-09-30 23:07:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-30 23:07:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-30 23:07:40,578 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-30 23:07:40,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:40,578 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-30 23:07:40,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:07:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-30 23:07:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:07:40,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:40,579 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:40,580 INFO L423 AbstractCegarLoop]: === Iteration 37 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:40,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:40,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1936399254, now seen corresponding path program 1 times [2018-09-30 23:07:40,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:40,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:40,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:40,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:07:40,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:40,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:40,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:40,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:41,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:41,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:41,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2018-09-30 23:07:41,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:07:41,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:07:41,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:41,114 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 13 states. [2018-09-30 23:07:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:42,875 INFO L93 Difference]: Finished difference Result 1432 states and 2278 transitions. [2018-09-30 23:07:42,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:07:42,875 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2018-09-30 23:07:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:42,878 INFO L225 Difference]: With dead ends: 1432 [2018-09-30 23:07:42,879 INFO L226 Difference]: Without dead ends: 1430 [2018-09-30 23:07:42,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:07:42,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2018-09-30 23:07:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1199. [2018-09-30 23:07:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1199 states. [2018-09-30 23:07:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1923 transitions. [2018-09-30 23:07:43,132 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1923 transitions. Word has length 16 [2018-09-30 23:07:43,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:43,132 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 1923 transitions. [2018-09-30 23:07:43,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:07:43,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1923 transitions. [2018-09-30 23:07:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:43,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:43,133 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:43,133 INFO L423 AbstractCegarLoop]: === Iteration 38 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:43,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:43,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1085218294, now seen corresponding path program 1 times [2018-09-30 23:07:43,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:43,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:43,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:43,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:43,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:43,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:43,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:43,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:43,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:43,352 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:07:43,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2018-09-30 23:07:43,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:07:43,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:07:43,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:07:43,353 INFO L87 Difference]: Start difference. First operand 1199 states and 1923 transitions. Second operand 17 states. [2018-09-30 23:07:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:46,130 INFO L93 Difference]: Finished difference Result 1695 states and 2653 transitions. [2018-09-30 23:07:46,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:07:46,131 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2018-09-30 23:07:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:46,133 INFO L225 Difference]: With dead ends: 1695 [2018-09-30 23:07:46,133 INFO L226 Difference]: Without dead ends: 1376 [2018-09-30 23:07:46,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=596, Invalid=4660, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:07:46,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2018-09-30 23:07:46,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1028. [2018-09-30 23:07:46,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2018-09-30 23:07:46,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1643 transitions. [2018-09-30 23:07:46,408 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1643 transitions. Word has length 18 [2018-09-30 23:07:46,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:46,408 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 1643 transitions. [2018-09-30 23:07:46,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:07:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1643 transitions. [2018-09-30 23:07:46,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:46,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:46,409 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:46,409 INFO L423 AbstractCegarLoop]: === Iteration 39 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:46,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:46,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1597439053, now seen corresponding path program 1 times [2018-09-30 23:07:46,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:46,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:46,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:46,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:46,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:46,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:46,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:46,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:46,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:46,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:46,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2018-09-30 23:07:46,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:07:46,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:07:46,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:07:46,640 INFO L87 Difference]: Start difference. First operand 1028 states and 1643 transitions. Second operand 16 states. [2018-09-30 23:07:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:48,630 INFO L93 Difference]: Finished difference Result 1514 states and 2354 transitions. [2018-09-30 23:07:48,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:07:48,630 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-30 23:07:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:48,633 INFO L225 Difference]: With dead ends: 1514 [2018-09-30 23:07:48,633 INFO L226 Difference]: Without dead ends: 1219 [2018-09-30 23:07:48,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:07:48,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2018-09-30 23:07:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1024. [2018-09-30 23:07:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2018-09-30 23:07:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1632 transitions. [2018-09-30 23:07:49,008 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1632 transitions. Word has length 18 [2018-09-30 23:07:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:49,008 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 1632 transitions. [2018-09-30 23:07:49,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:07:49,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1632 transitions. [2018-09-30 23:07:49,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:49,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:49,009 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:49,010 INFO L423 AbstractCegarLoop]: === Iteration 40 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:49,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:49,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1672170852, now seen corresponding path program 1 times [2018-09-30 23:07:49,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:49,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:49,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:49,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:49,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:07:49,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:49,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:49,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:49,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:49,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:49,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2018-09-30 23:07:49,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:07:49,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:07:49,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:07:49,792 INFO L87 Difference]: Start difference. First operand 1024 states and 1632 transitions. Second operand 16 states. [2018-09-30 23:07:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:51,516 INFO L93 Difference]: Finished difference Result 2556 states and 4045 transitions. [2018-09-30 23:07:51,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:07:51,517 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-30 23:07:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:51,519 INFO L225 Difference]: With dead ends: 2556 [2018-09-30 23:07:51,519 INFO L226 Difference]: Without dead ends: 1529 [2018-09-30 23:07:51,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:07:51,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2018-09-30 23:07:51,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1073. [2018-09-30 23:07:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1073 states. [2018-09-30 23:07:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1703 transitions. [2018-09-30 23:07:51,857 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1703 transitions. Word has length 18 [2018-09-30 23:07:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:51,857 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 1703 transitions. [2018-09-30 23:07:51,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:07:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1703 transitions. [2018-09-30 23:07:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:51,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:51,858 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:51,858 INFO L423 AbstractCegarLoop]: === Iteration 41 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:51,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:51,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1136854538, now seen corresponding path program 1 times [2018-09-30 23:07:51,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:51,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:51,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:51,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:51,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:51,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:51,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:51,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:51,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:52,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:52,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-30 23:07:52,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:07:52,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:07:52,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:52,075 INFO L87 Difference]: Start difference. First operand 1073 states and 1703 transitions. Second operand 15 states. [2018-09-30 23:07:53,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:53,680 INFO L93 Difference]: Finished difference Result 1546 states and 2389 transitions. [2018-09-30 23:07:53,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:07:53,680 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-09-30 23:07:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:53,683 INFO L225 Difference]: With dead ends: 1546 [2018-09-30 23:07:53,683 INFO L226 Difference]: Without dead ends: 1291 [2018-09-30 23:07:53,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:07:53,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2018-09-30 23:07:53,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1056. [2018-09-30 23:07:53,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2018-09-30 23:07:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1674 transitions. [2018-09-30 23:07:53,990 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1674 transitions. Word has length 18 [2018-09-30 23:07:53,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:53,991 INFO L480 AbstractCegarLoop]: Abstraction has 1056 states and 1674 transitions. [2018-09-30 23:07:53,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:07:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1674 transitions. [2018-09-30 23:07:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:53,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:53,992 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:53,992 INFO L423 AbstractCegarLoop]: === Iteration 42 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:53,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:53,992 INFO L82 PathProgramCache]: Analyzing trace with hash 975863549, now seen corresponding path program 1 times [2018-09-30 23:07:53,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:53,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:53,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:53,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:53,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:54,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:54,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:54,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:54,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:54,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:54,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:07:54,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:07:54,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:07:54,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:07:54,099 INFO L87 Difference]: Start difference. First operand 1056 states and 1674 transitions. Second operand 7 states. [2018-09-30 23:07:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:54,735 INFO L93 Difference]: Finished difference Result 1635 states and 2515 transitions. [2018-09-30 23:07:54,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:07:54,736 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2018-09-30 23:07:54,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:54,738 INFO L225 Difference]: With dead ends: 1635 [2018-09-30 23:07:54,738 INFO L226 Difference]: Without dead ends: 1494 [2018-09-30 23:07:54,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:54,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2018-09-30 23:07:55,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1094. [2018-09-30 23:07:55,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2018-09-30 23:07:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1728 transitions. [2018-09-30 23:07:55,105 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1728 transitions. Word has length 18 [2018-09-30 23:07:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:55,105 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 1728 transitions. [2018-09-30 23:07:55,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:07:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1728 transitions. [2018-09-30 23:07:55,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:07:55,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:55,106 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:07:55,106 INFO L423 AbstractCegarLoop]: === Iteration 43 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:55,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:55,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1152261854, now seen corresponding path program 1 times [2018-09-30 23:07:55,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:55,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:55,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:55,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:55,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:55,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:55,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:55,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:55,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:55,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:55,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 16 [2018-09-30 23:07:55,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:07:55,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:07:55,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:07:55,352 INFO L87 Difference]: Start difference. First operand 1094 states and 1728 transitions. Second operand 17 states. [2018-09-30 23:07:58,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:58,797 INFO L93 Difference]: Finished difference Result 2230 states and 3534 transitions. [2018-09-30 23:07:58,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:07:58,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-09-30 23:07:58,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:58,804 INFO L225 Difference]: With dead ends: 2230 [2018-09-30 23:07:58,804 INFO L226 Difference]: Without dead ends: 2180 [2018-09-30 23:07:58,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1477, Invalid=4529, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:07:58,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2018-09-30 23:07:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1150. [2018-09-30 23:07:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2018-09-30 23:07:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1853 transitions. [2018-09-30 23:07:59,201 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1853 transitions. Word has length 20 [2018-09-30 23:07:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:59,201 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 1853 transitions. [2018-09-30 23:07:59,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:07:59,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1853 transitions. [2018-09-30 23:07:59,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:07:59,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:59,202 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:59,202 INFO L423 AbstractCegarLoop]: === Iteration 44 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:59,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:59,202 INFO L82 PathProgramCache]: Analyzing trace with hash -79326665, now seen corresponding path program 1 times [2018-09-30 23:07:59,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:59,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:59,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:59,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:59,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:07:59,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:59,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:59,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:59,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:07:59,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:59,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:07:59,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:07:59,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:07:59,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:07:59,309 INFO L87 Difference]: Start difference. First operand 1150 states and 1853 transitions. Second operand 7 states. [2018-09-30 23:07:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:59,840 INFO L93 Difference]: Finished difference Result 1760 states and 2751 transitions. [2018-09-30 23:07:59,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:07:59,840 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-09-30 23:07:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:59,842 INFO L225 Difference]: With dead ends: 1760 [2018-09-30 23:07:59,842 INFO L226 Difference]: Without dead ends: 1507 [2018-09-30 23:07:59,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:07:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2018-09-30 23:08:00,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1026. [2018-09-30 23:08:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1026 states. [2018-09-30 23:08:00,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1655 transitions. [2018-09-30 23:08:00,104 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1655 transitions. Word has length 20 [2018-09-30 23:08:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:00,104 INFO L480 AbstractCegarLoop]: Abstraction has 1026 states and 1655 transitions. [2018-09-30 23:08:00,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:08:00,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1655 transitions. [2018-09-30 23:08:00,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:08:00,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:00,105 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:08:00,106 INFO L423 AbstractCegarLoop]: === Iteration 45 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:00,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:00,106 INFO L82 PathProgramCache]: Analyzing trace with hash -79325383, now seen corresponding path program 1 times [2018-09-30 23:08:00,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:00,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:00,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:00,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:00,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:00,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:00,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:00,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:00,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:00,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:00,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2018-09-30 23:08:00,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:08:00,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:08:00,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:08:00,363 INFO L87 Difference]: Start difference. First operand 1026 states and 1655 transitions. Second operand 13 states. [2018-09-30 23:08:02,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:02,438 INFO L93 Difference]: Finished difference Result 1878 states and 3019 transitions. [2018-09-30 23:08:02,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:08:02,439 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2018-09-30 23:08:02,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:02,441 INFO L225 Difference]: With dead ends: 1878 [2018-09-30 23:08:02,441 INFO L226 Difference]: Without dead ends: 1729 [2018-09-30 23:08:02,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:08:02,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2018-09-30 23:08:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1013. [2018-09-30 23:08:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1013 states. [2018-09-30 23:08:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1646 transitions. [2018-09-30 23:08:02,722 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1646 transitions. Word has length 20 [2018-09-30 23:08:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:02,722 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 1646 transitions. [2018-09-30 23:08:02,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:08:02,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1646 transitions. [2018-09-30 23:08:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:08:02,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:02,723 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:02,723 INFO L423 AbstractCegarLoop]: === Iteration 46 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:02,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:02,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1614386347, now seen corresponding path program 1 times [2018-09-30 23:08:02,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:02,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:02,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:02,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:02,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:08:02,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:02,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:02,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:02,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:03,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:03,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-30 23:08:03,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:08:03,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:08:03,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:08:03,042 INFO L87 Difference]: Start difference. First operand 1013 states and 1646 transitions. Second operand 20 states. [2018-09-30 23:08:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:06,783 INFO L93 Difference]: Finished difference Result 2738 states and 4441 transitions. [2018-09-30 23:08:06,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:08:06,784 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-30 23:08:06,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:06,786 INFO L225 Difference]: With dead ends: 2738 [2018-09-30 23:08:06,786 INFO L226 Difference]: Without dead ends: 1726 [2018-09-30 23:08:06,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1197, Invalid=6813, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:08:06,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2018-09-30 23:08:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1481. [2018-09-30 23:08:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1481 states. [2018-09-30 23:08:07,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2418 transitions. [2018-09-30 23:08:07,131 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2418 transitions. Word has length 21 [2018-09-30 23:08:07,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:07,131 INFO L480 AbstractCegarLoop]: Abstraction has 1481 states and 2418 transitions. [2018-09-30 23:08:07,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:08:07,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2418 transitions. [2018-09-30 23:08:07,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:08:07,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:07,132 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:07,132 INFO L423 AbstractCegarLoop]: === Iteration 47 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:07,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:07,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1615679213, now seen corresponding path program 1 times [2018-09-30 23:08:07,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:07,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:07,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:07,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:07,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:07,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:07,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:07,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:07,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:07,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:07,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-30 23:08:07,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:08:07,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:08:07,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:08:07,400 INFO L87 Difference]: Start difference. First operand 1481 states and 2418 transitions. Second operand 18 states. [2018-09-30 23:08:11,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:11,542 INFO L93 Difference]: Finished difference Result 2759 states and 4491 transitions. [2018-09-30 23:08:11,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:08:11,543 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-30 23:08:11,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:11,545 INFO L225 Difference]: With dead ends: 2759 [2018-09-30 23:08:11,545 INFO L226 Difference]: Without dead ends: 2757 [2018-09-30 23:08:11,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=899, Invalid=4503, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:08:11,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2018-09-30 23:08:11,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 1886. [2018-09-30 23:08:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2018-09-30 23:08:11,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3096 transitions. [2018-09-30 23:08:11,975 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3096 transitions. Word has length 21 [2018-09-30 23:08:11,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:11,976 INFO L480 AbstractCegarLoop]: Abstraction has 1886 states and 3096 transitions. [2018-09-30 23:08:11,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:08:11,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3096 transitions. [2018-09-30 23:08:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:08:11,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:11,977 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:11,977 INFO L423 AbstractCegarLoop]: === Iteration 48 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:11,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:11,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1336385522, now seen corresponding path program 1 times [2018-09-30 23:08:11,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:11,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:11,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:11,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:11,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:12,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:12,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:12,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:12,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:12,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:12,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2018-09-30 23:08:12,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:08:12,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:08:12,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:08:12,904 INFO L87 Difference]: Start difference. First operand 1886 states and 3096 transitions. Second operand 16 states. [2018-09-30 23:08:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:16,380 INFO L93 Difference]: Finished difference Result 2657 states and 4320 transitions. [2018-09-30 23:08:16,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:08:16,380 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2018-09-30 23:08:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:16,384 INFO L225 Difference]: With dead ends: 2657 [2018-09-30 23:08:16,384 INFO L226 Difference]: Without dead ends: 2655 [2018-09-30 23:08:16,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=659, Invalid=2647, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:08:16,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2018-09-30 23:08:16,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 1726. [2018-09-30 23:08:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1726 states. [2018-09-30 23:08:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2827 transitions. [2018-09-30 23:08:16,872 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2827 transitions. Word has length 21 [2018-09-30 23:08:16,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:16,872 INFO L480 AbstractCegarLoop]: Abstraction has 1726 states and 2827 transitions. [2018-09-30 23:08:16,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:08:16,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2827 transitions. [2018-09-30 23:08:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:08:16,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:16,873 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:16,873 INFO L423 AbstractCegarLoop]: === Iteration 49 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:16,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:16,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1327798635, now seen corresponding path program 1 times [2018-09-30 23:08:16,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:16,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:16,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:16,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:16,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:16,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:16,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:16,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:17,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:17,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:17,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2018-09-30 23:08:17,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:08:17,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:08:17,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:08:17,153 INFO L87 Difference]: Start difference. First operand 1726 states and 2827 transitions. Second operand 17 states. [2018-09-30 23:08:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:21,058 INFO L93 Difference]: Finished difference Result 2434 states and 3937 transitions. [2018-09-30 23:08:21,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:08:21,058 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2018-09-30 23:08:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:21,061 INFO L225 Difference]: With dead ends: 2434 [2018-09-30 23:08:21,061 INFO L226 Difference]: Without dead ends: 2432 [2018-09-30 23:08:21,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=632, Invalid=3150, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:08:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2018-09-30 23:08:21,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1872. [2018-09-30 23:08:21,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2018-09-30 23:08:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 3060 transitions. [2018-09-30 23:08:21,916 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 3060 transitions. Word has length 21 [2018-09-30 23:08:21,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:21,916 INFO L480 AbstractCegarLoop]: Abstraction has 1872 states and 3060 transitions. [2018-09-30 23:08:21,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:08:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 3060 transitions. [2018-09-30 23:08:21,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:08:21,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:21,918 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:21,918 INFO L423 AbstractCegarLoop]: === Iteration 50 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:21,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:21,918 INFO L82 PathProgramCache]: Analyzing trace with hash 133649308, now seen corresponding path program 2 times [2018-09-30 23:08:21,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:21,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:21,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:21,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:21,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:23,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:23,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:23,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:08:23,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:08:23,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:08:23,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:08:23,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:23,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2018-09-30 23:08:23,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:08:23,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:08:23,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:08:23,525 INFO L87 Difference]: Start difference. First operand 1872 states and 3060 transitions. Second operand 16 states. [2018-09-30 23:08:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:26,492 INFO L93 Difference]: Finished difference Result 2526 states and 4072 transitions. [2018-09-30 23:08:26,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:08:26,493 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2018-09-30 23:08:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:26,495 INFO L225 Difference]: With dead ends: 2526 [2018-09-30 23:08:26,495 INFO L226 Difference]: Without dead ends: 2334 [2018-09-30 23:08:26,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=543, Invalid=2763, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:08:26,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2018-09-30 23:08:27,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 2001. [2018-09-30 23:08:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2001 states. [2018-09-30 23:08:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 3219 transitions. [2018-09-30 23:08:27,026 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 3219 transitions. Word has length 21 [2018-09-30 23:08:27,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:27,026 INFO L480 AbstractCegarLoop]: Abstraction has 2001 states and 3219 transitions. [2018-09-30 23:08:27,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:08:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 3219 transitions. [2018-09-30 23:08:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:08:27,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:27,027 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:27,028 INFO L423 AbstractCegarLoop]: === Iteration 51 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:27,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:27,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1958649716, now seen corresponding path program 1 times [2018-09-30 23:08:27,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:27,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:27,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:27,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:08:27,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:27,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:27,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:27,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:27,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:28,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:28,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-09-30 23:08:28,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:08:28,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:08:28,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:08:28,062 INFO L87 Difference]: Start difference. First operand 2001 states and 3219 transitions. Second operand 18 states. [2018-09-30 23:08:33,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:33,646 INFO L93 Difference]: Finished difference Result 2607 states and 4131 transitions. [2018-09-30 23:08:33,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:08:33,647 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-30 23:08:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:33,649 INFO L225 Difference]: With dead ends: 2607 [2018-09-30 23:08:33,649 INFO L226 Difference]: Without dead ends: 2605 [2018-09-30 23:08:33,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1198, Invalid=4808, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:08:33,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2018-09-30 23:08:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1559. [2018-09-30 23:08:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1559 states. [2018-09-30 23:08:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 2486 transitions. [2018-09-30 23:08:34,112 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 2486 transitions. Word has length 21 [2018-09-30 23:08:34,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:34,112 INFO L480 AbstractCegarLoop]: Abstraction has 1559 states and 2486 transitions. [2018-09-30 23:08:34,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:08:34,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 2486 transitions. [2018-09-30 23:08:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:08:34,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:34,113 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:34,113 INFO L423 AbstractCegarLoop]: === Iteration 52 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:34,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:34,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1950062829, now seen corresponding path program 1 times [2018-09-30 23:08:34,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:34,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:34,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:34,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:34,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:34,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:34,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:34,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:34,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:34,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:34,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-30 23:08:34,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:08:34,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:08:34,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:08:34,593 INFO L87 Difference]: Start difference. First operand 1559 states and 2486 transitions. Second operand 18 states. [2018-09-30 23:08:39,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:39,825 INFO L93 Difference]: Finished difference Result 2107 states and 3306 transitions. [2018-09-30 23:08:39,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:08:39,825 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-30 23:08:39,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:39,827 INFO L225 Difference]: With dead ends: 2107 [2018-09-30 23:08:39,827 INFO L226 Difference]: Without dead ends: 2105 [2018-09-30 23:08:39,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1282, Invalid=6200, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:08:39,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2018-09-30 23:08:40,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1432. [2018-09-30 23:08:40,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1432 states. [2018-09-30 23:08:40,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2283 transitions. [2018-09-30 23:08:40,227 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2283 transitions. Word has length 21 [2018-09-30 23:08:40,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:40,227 INFO L480 AbstractCegarLoop]: Abstraction has 1432 states and 2283 transitions. [2018-09-30 23:08:40,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:08:40,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2283 transitions. [2018-09-30 23:08:40,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:08:40,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:40,228 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:40,229 INFO L423 AbstractCegarLoop]: === Iteration 53 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:40,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:40,229 INFO L82 PathProgramCache]: Analyzing trace with hash 830618954, now seen corresponding path program 2 times [2018-09-30 23:08:40,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:40,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:40,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:40,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:40,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:40,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:40,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:40,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:08:40,364 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:08:40,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:08:40,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:08:40,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:40,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2018-09-30 23:08:40,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:08:40,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:08:40,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:08:40,451 INFO L87 Difference]: Start difference. First operand 1432 states and 2283 transitions. Second operand 15 states. [2018-09-30 23:08:43,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:43,659 INFO L93 Difference]: Finished difference Result 1886 states and 2991 transitions. [2018-09-30 23:08:43,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:08:43,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-30 23:08:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:43,661 INFO L225 Difference]: With dead ends: 1886 [2018-09-30 23:08:43,662 INFO L226 Difference]: Without dead ends: 1884 [2018-09-30 23:08:43,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=644, Invalid=3138, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:08:43,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2018-09-30 23:08:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1404. [2018-09-30 23:08:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2018-09-30 23:08:44,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2237 transitions. [2018-09-30 23:08:44,100 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2237 transitions. Word has length 21 [2018-09-30 23:08:44,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:44,100 INFO L480 AbstractCegarLoop]: Abstraction has 1404 states and 2237 transitions. [2018-09-30 23:08:44,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:08:44,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2237 transitions. [2018-09-30 23:08:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:08:44,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:44,101 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:44,101 INFO L423 AbstractCegarLoop]: === Iteration 54 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:44,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:44,101 INFO L82 PathProgramCache]: Analyzing trace with hash 822030785, now seen corresponding path program 1 times [2018-09-30 23:08:44,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:44,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:44,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:44,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:08:44,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:08:44,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:44,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:44,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:44,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:44,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:44,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-30 23:08:44,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:08:44,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:08:44,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:08:44,439 INFO L87 Difference]: Start difference. First operand 1404 states and 2237 transitions. Second operand 20 states. [2018-09-30 23:08:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:49,500 INFO L93 Difference]: Finished difference Result 2676 states and 4218 transitions. [2018-09-30 23:08:49,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:08:49,501 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-30 23:08:49,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:49,502 INFO L225 Difference]: With dead ends: 2676 [2018-09-30 23:08:49,502 INFO L226 Difference]: Without dead ends: 1637 [2018-09-30 23:08:49,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1444, Invalid=7486, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:08:49,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2018-09-30 23:08:49,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1391. [2018-09-30 23:08:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1391 states. [2018-09-30 23:08:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2209 transitions. [2018-09-30 23:08:49,977 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2209 transitions. Word has length 21 [2018-09-30 23:08:49,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:49,977 INFO L480 AbstractCegarLoop]: Abstraction has 1391 states and 2209 transitions. [2018-09-30 23:08:49,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:08:49,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2209 transitions. [2018-09-30 23:08:49,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:08:49,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:49,978 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:49,978 INFO L423 AbstractCegarLoop]: === Iteration 55 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:49,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:49,978 INFO L82 PathProgramCache]: Analyzing trace with hash 822032067, now seen corresponding path program 2 times [2018-09-30 23:08:49,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:49,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:49,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:49,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:49,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:50,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:50,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:50,090 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:08:50,103 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:08:50,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:08:50,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:08:50,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:50,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2018-09-30 23:08:50,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:08:50,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:08:50,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:08:50,246 INFO L87 Difference]: Start difference. First operand 1391 states and 2209 transitions. Second operand 18 states. [2018-09-30 23:08:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:54,834 INFO L93 Difference]: Finished difference Result 2169 states and 3390 transitions. [2018-09-30 23:08:54,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:08:54,835 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-30 23:08:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:54,837 INFO L225 Difference]: With dead ends: 2169 [2018-09-30 23:08:54,837 INFO L226 Difference]: Without dead ends: 2167 [2018-09-30 23:08:54,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1116, Invalid=5856, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:08:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2018-09-30 23:08:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1375. [2018-09-30 23:08:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1375 states. [2018-09-30 23:08:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 2186 transitions. [2018-09-30 23:08:55,328 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 2186 transitions. Word has length 21 [2018-09-30 23:08:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:55,328 INFO L480 AbstractCegarLoop]: Abstraction has 1375 states and 2186 transitions. [2018-09-30 23:08:55,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:08:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 2186 transitions. [2018-09-30 23:08:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:08:55,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:55,329 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:55,330 INFO L423 AbstractCegarLoop]: === Iteration 56 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:55,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:55,330 INFO L82 PathProgramCache]: Analyzing trace with hash -97849607, now seen corresponding path program 1 times [2018-09-30 23:08:55,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:55,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:55,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:55,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:08:55,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:08:55,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:55,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:55,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:55,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:55,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:55,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-30 23:08:55,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:08:55,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:08:55,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:08:55,629 INFO L87 Difference]: Start difference. First operand 1375 states and 2186 transitions. Second operand 19 states. [2018-09-30 23:08:58,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:58,864 INFO L93 Difference]: Finished difference Result 3096 states and 4913 transitions. [2018-09-30 23:08:58,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:08:58,865 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2018-09-30 23:08:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:58,866 INFO L225 Difference]: With dead ends: 3096 [2018-09-30 23:08:58,866 INFO L226 Difference]: Without dead ends: 1770 [2018-09-30 23:08:58,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=571, Invalid=2735, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:08:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2018-09-30 23:08:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1381. [2018-09-30 23:08:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1381 states. [2018-09-30 23:08:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 2193 transitions. [2018-09-30 23:08:59,398 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 2193 transitions. Word has length 21 [2018-09-30 23:08:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:59,398 INFO L480 AbstractCegarLoop]: Abstraction has 1381 states and 2193 transitions. [2018-09-30 23:08:59,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:08:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 2193 transitions. [2018-09-30 23:08:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:08:59,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:59,400 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:59,400 INFO L423 AbstractCegarLoop]: === Iteration 57 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:59,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:59,400 INFO L82 PathProgramCache]: Analyzing trace with hash 437466707, now seen corresponding path program 1 times [2018-09-30 23:08:59,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:59,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:59,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:59,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:59,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:59,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:59,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:59,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:59,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:08:59,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:59,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2018-09-30 23:08:59,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:08:59,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:08:59,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:08:59,606 INFO L87 Difference]: Start difference. First operand 1381 states and 2193 transitions. Second operand 13 states. [2018-09-30 23:09:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:01,502 INFO L93 Difference]: Finished difference Result 1858 states and 2972 transitions. [2018-09-30 23:09:01,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:09:01,503 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2018-09-30 23:09:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:01,504 INFO L225 Difference]: With dead ends: 1858 [2018-09-30 23:09:01,505 INFO L226 Difference]: Without dead ends: 1856 [2018-09-30 23:09:01,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:09:01,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2018-09-30 23:09:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1551. [2018-09-30 23:09:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1551 states. [2018-09-30 23:09:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 2486 transitions. [2018-09-30 23:09:02,057 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 2486 transitions. Word has length 21 [2018-09-30 23:09:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:02,057 INFO L480 AbstractCegarLoop]: Abstraction has 1551 states and 2486 transitions. [2018-09-30 23:09:02,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:09:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 2486 transitions. [2018-09-30 23:09:02,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:09:02,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:02,059 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:09:02,059 INFO L423 AbstractCegarLoop]: === Iteration 58 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:02,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:02,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2130898623, now seen corresponding path program 2 times [2018-09-30 23:09:02,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:02,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:02,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:02,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:02,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:09:02,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:02,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:02,173 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:09:02,181 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:09:02,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:09:02,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:09:02,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:02,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-09-30 23:09:02,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:09:02,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:09:02,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:09:02,378 INFO L87 Difference]: Start difference. First operand 1551 states and 2486 transitions. Second operand 19 states. [2018-09-30 23:09:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:05,844 INFO L93 Difference]: Finished difference Result 1901 states and 3071 transitions. [2018-09-30 23:09:05,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:09:05,845 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2018-09-30 23:09:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:05,846 INFO L225 Difference]: With dead ends: 1901 [2018-09-30 23:09:05,846 INFO L226 Difference]: Without dead ends: 1899 [2018-09-30 23:09:05,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=509, Invalid=3031, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:09:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2018-09-30 23:09:06,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1583. [2018-09-30 23:09:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1583 states. [2018-09-30 23:09:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2523 transitions. [2018-09-30 23:09:06,405 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2523 transitions. Word has length 21 [2018-09-30 23:09:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:06,406 INFO L480 AbstractCegarLoop]: Abstraction has 1583 states and 2523 transitions. [2018-09-30 23:09:06,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:09:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2523 transitions. [2018-09-30 23:09:06,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:09:06,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:06,407 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:09:06,407 INFO L423 AbstractCegarLoop]: === Iteration 59 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:06,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:06,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2139486792, now seen corresponding path program 1 times [2018-09-30 23:09:06,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:06,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:06,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:06,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:09:06,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:06,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:06,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:06,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:06,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:09:06,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:06,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2018-09-30 23:09:06,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:09:06,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:09:06,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:09:06,678 INFO L87 Difference]: Start difference. First operand 1583 states and 2523 transitions. Second operand 13 states. [2018-09-30 23:09:09,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:09,548 INFO L93 Difference]: Finished difference Result 2207 states and 3564 transitions. [2018-09-30 23:09:09,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:09:09,548 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2018-09-30 23:09:09,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:09,550 INFO L225 Difference]: With dead ends: 2207 [2018-09-30 23:09:09,550 INFO L226 Difference]: Without dead ends: 2205 [2018-09-30 23:09:09,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:09:09,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2018-09-30 23:09:10,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1741. [2018-09-30 23:09:10,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1741 states. [2018-09-30 23:09:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2777 transitions. [2018-09-30 23:09:10,151 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2777 transitions. Word has length 21 [2018-09-30 23:09:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:10,151 INFO L480 AbstractCegarLoop]: Abstraction has 1741 states and 2777 transitions. [2018-09-30 23:09:10,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:09:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2777 transitions. [2018-09-30 23:09:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:09:10,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:10,152 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:09:10,152 INFO L423 AbstractCegarLoop]: === Iteration 60 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:10,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:10,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1673653662, now seen corresponding path program 2 times [2018-09-30 23:09:10,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:10,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:10,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:10,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:10,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:10,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:10,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:10,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:09:10,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:09:10,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:09:10,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:10,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:10,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-09-30 23:09:10,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:09:10,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:09:10,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:09:10,378 INFO L87 Difference]: Start difference. First operand 1741 states and 2777 transitions. Second operand 15 states. [2018-09-30 23:09:14,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:14,775 INFO L93 Difference]: Finished difference Result 3370 states and 5507 transitions. [2018-09-30 23:09:14,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:09:14,775 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-30 23:09:14,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:14,778 INFO L225 Difference]: With dead ends: 3370 [2018-09-30 23:09:14,778 INFO L226 Difference]: Without dead ends: 3368 [2018-09-30 23:09:14,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=719, Invalid=2941, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:09:14,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2018-09-30 23:09:15,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2044. [2018-09-30 23:09:15,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2018-09-30 23:09:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 3284 transitions. [2018-09-30 23:09:15,418 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 3284 transitions. Word has length 21 [2018-09-30 23:09:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:15,418 INFO L480 AbstractCegarLoop]: Abstraction has 2044 states and 3284 transitions. [2018-09-30 23:09:15,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:09:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 3284 transitions. [2018-09-30 23:09:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:09:15,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:15,419 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:09:15,420 INFO L423 AbstractCegarLoop]: === Iteration 61 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:15,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:15,420 INFO L82 PathProgramCache]: Analyzing trace with hash 212422270, now seen corresponding path program 2 times [2018-09-30 23:09:15,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:15,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:15,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:15,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:09:15,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-30 23:09:15,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:15,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:15,498 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:09:15,508 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:09:15,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:09:15,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:09:15,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:15,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-09-30 23:09:15,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:09:15,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:09:15,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:09:15,595 INFO L87 Difference]: Start difference. First operand 2044 states and 3284 transitions. Second operand 12 states. [2018-09-30 23:09:18,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:18,268 INFO L93 Difference]: Finished difference Result 5216 states and 8321 transitions. [2018-09-30 23:09:18,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:09:18,269 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-09-30 23:09:18,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:18,271 INFO L225 Difference]: With dead ends: 5216 [2018-09-30 23:09:18,271 INFO L226 Difference]: Without dead ends: 3229 [2018-09-30 23:09:18,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:09:18,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2018-09-30 23:09:19,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2942. [2018-09-30 23:09:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2942 states. [2018-09-30 23:09:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 4622 transitions. [2018-09-30 23:09:19,266 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 4622 transitions. Word has length 21 [2018-09-30 23:09:19,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:19,266 INFO L480 AbstractCegarLoop]: Abstraction has 2942 states and 4622 transitions. [2018-09-30 23:09:19,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:09:19,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 4622 transitions. [2018-09-30 23:09:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:09:19,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:19,267 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:09:19,268 INFO L423 AbstractCegarLoop]: === Iteration 62 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:19,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:19,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1977173104, now seen corresponding path program 1 times [2018-09-30 23:09:19,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:19,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:19,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:19,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:09:19,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:19,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:19,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:19,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:19,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:19,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:19,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2018-09-30 23:09:19,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:09:19,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:09:19,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:09:19,623 INFO L87 Difference]: Start difference. First operand 2942 states and 4622 transitions. Second operand 22 states. [2018-09-30 23:09:28,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:28,148 INFO L93 Difference]: Finished difference Result 4706 states and 7339 transitions. [2018-09-30 23:09:28,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 23:09:28,148 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2018-09-30 23:09:28,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:28,152 INFO L225 Difference]: With dead ends: 4706 [2018-09-30 23:09:28,152 INFO L226 Difference]: Without dead ends: 4704 [2018-09-30 23:09:28,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5067 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2033, Invalid=12009, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:09:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2018-09-30 23:09:29,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3514. [2018-09-30 23:09:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3514 states. [2018-09-30 23:09:29,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 5500 transitions. [2018-09-30 23:09:29,727 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 5500 transitions. Word has length 23 [2018-09-30 23:09:29,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:29,727 INFO L480 AbstractCegarLoop]: Abstraction has 3514 states and 5500 transitions. [2018-09-30 23:09:29,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:09:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 5500 transitions. [2018-09-30 23:09:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:09:29,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:29,729 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:09:29,729 INFO L423 AbstractCegarLoop]: === Iteration 63 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:29,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1266805704, now seen corresponding path program 1 times [2018-09-30 23:09:29,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:29,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:29,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:29,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:29,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:29,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:29,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:29,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:29,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:09:30,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:30,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2018-09-30 23:09:30,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:09:30,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:09:30,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:09:30,072 INFO L87 Difference]: Start difference. First operand 3514 states and 5500 transitions. Second operand 21 states. [2018-09-30 23:09:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:36,914 INFO L93 Difference]: Finished difference Result 4911 states and 7636 transitions. [2018-09-30 23:09:36,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:09:36,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2018-09-30 23:09:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:36,919 INFO L225 Difference]: With dead ends: 4911 [2018-09-30 23:09:36,919 INFO L226 Difference]: Without dead ends: 4904 [2018-09-30 23:09:36,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=802, Invalid=3890, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:09:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4904 states. [2018-09-30 23:09:38,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4904 to 2925. [2018-09-30 23:09:38,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2925 states. [2018-09-30 23:09:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 4501 transitions. [2018-09-30 23:09:38,751 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 4501 transitions. Word has length 23 [2018-09-30 23:09:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:38,751 INFO L480 AbstractCegarLoop]: Abstraction has 2925 states and 4501 transitions. [2018-09-30 23:09:38,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:09:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 4501 transitions. [2018-09-30 23:09:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:09:38,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:38,753 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:09:38,753 INFO L423 AbstractCegarLoop]: === Iteration 64 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:38,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:38,753 INFO L82 PathProgramCache]: Analyzing trace with hash -407447728, now seen corresponding path program 1 times [2018-09-30 23:09:38,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:38,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:38,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:38,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:38,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:39,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:39,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:39,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:39,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:09:39,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:39,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2018-09-30 23:09:39,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:09:39,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:09:39,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:09:39,215 INFO L87 Difference]: Start difference. First operand 2925 states and 4501 transitions. Second operand 22 states. [2018-09-30 23:09:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:44,609 INFO L93 Difference]: Finished difference Result 3641 states and 5640 transitions. [2018-09-30 23:09:44,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:09:44,609 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2018-09-30 23:09:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:44,612 INFO L225 Difference]: With dead ends: 3641 [2018-09-30 23:09:44,612 INFO L226 Difference]: Without dead ends: 3634 [2018-09-30 23:09:44,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=768, Invalid=3788, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:09:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2018-09-30 23:09:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 2472. [2018-09-30 23:09:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2472 states. [2018-09-30 23:09:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3826 transitions. [2018-09-30 23:09:45,873 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3826 transitions. Word has length 23 [2018-09-30 23:09:45,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:45,873 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 3826 transitions. [2018-09-30 23:09:45,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:09:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3826 transitions. [2018-09-30 23:09:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:09:45,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:45,875 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:09:45,875 INFO L423 AbstractCegarLoop]: === Iteration 65 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:45,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:45,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1545525427, now seen corresponding path program 1 times [2018-09-30 23:09:45,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:45,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:45,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:45,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:45,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:46,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:46,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:46,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:46,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:09:46,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:46,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2018-09-30 23:09:46,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:09:46,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:09:46,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:09:46,133 INFO L87 Difference]: Start difference. First operand 2472 states and 3826 transitions. Second operand 15 states. [2018-09-30 23:09:50,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:50,040 INFO L93 Difference]: Finished difference Result 3028 states and 4680 transitions. [2018-09-30 23:09:50,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:09:50,041 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2018-09-30 23:09:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:50,044 INFO L225 Difference]: With dead ends: 3028 [2018-09-30 23:09:50,044 INFO L226 Difference]: Without dead ends: 3026 [2018-09-30 23:09:50,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:09:50,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2018-09-30 23:09:51,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2443. [2018-09-30 23:09:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2443 states. [2018-09-30 23:09:51,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3774 transitions. [2018-09-30 23:09:51,480 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3774 transitions. Word has length 24 [2018-09-30 23:09:51,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:51,480 INFO L480 AbstractCegarLoop]: Abstraction has 2443 states and 3774 transitions. [2018-09-30 23:09:51,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:09:51,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3774 transitions. [2018-09-30 23:09:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:09:51,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:51,481 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 23:09:51,482 INFO L423 AbstractCegarLoop]: === Iteration 66 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:51,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash -136248690, now seen corresponding path program 3 times [2018-09-30 23:09:51,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:51,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:51,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:51,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:51,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:09:51,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:51,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:51,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:09:51,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-09-30 23:09:51,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:09:51,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-30 23:09:51,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:51,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-09-30 23:09:51,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:09:51,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:09:51,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:09:51,710 INFO L87 Difference]: Start difference. First operand 2443 states and 3774 transitions. Second operand 15 states. [2018-09-30 23:09:54,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:54,682 INFO L93 Difference]: Finished difference Result 2592 states and 4005 transitions. [2018-09-30 23:09:54,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:09:54,683 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2018-09-30 23:09:54,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:54,685 INFO L225 Difference]: With dead ends: 2592 [2018-09-30 23:09:54,685 INFO L226 Difference]: Without dead ends: 2590 [2018-09-30 23:09:54,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:09:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2018-09-30 23:09:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2279. [2018-09-30 23:09:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2279 states. [2018-09-30 23:09:56,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3506 transitions. [2018-09-30 23:09:56,087 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3506 transitions. Word has length 24 [2018-09-30 23:09:56,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:56,087 INFO L480 AbstractCegarLoop]: Abstraction has 2279 states and 3506 transitions. [2018-09-30 23:09:56,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:09:56,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3506 transitions. [2018-09-30 23:09:56,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:09:56,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:56,089 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:09:56,089 INFO L423 AbstractCegarLoop]: === Iteration 67 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:56,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:56,089 INFO L82 PathProgramCache]: Analyzing trace with hash -518454402, now seen corresponding path program 1 times [2018-09-30 23:09:56,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:56,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:56,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:56,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:09:56,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:56,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:56,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:56,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:56,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:09:56,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:56,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2018-09-30 23:09:56,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:09:56,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:09:56,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:09:56,327 INFO L87 Difference]: Start difference. First operand 2279 states and 3506 transitions. Second operand 16 states. [2018-09-30 23:09:59,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:59,570 INFO L93 Difference]: Finished difference Result 2414 states and 3709 transitions. [2018-09-30 23:09:59,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:09:59,571 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2018-09-30 23:09:59,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:59,573 INFO L225 Difference]: With dead ends: 2414 [2018-09-30 23:09:59,573 INFO L226 Difference]: Without dead ends: 2412 [2018-09-30 23:09:59,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:09:59,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2018-09-30 23:10:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2274. [2018-09-30 23:10:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2274 states. [2018-09-30 23:10:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 3496 transitions. [2018-09-30 23:10:00,880 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 3496 transitions. Word has length 24 [2018-09-30 23:10:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:10:00,880 INFO L480 AbstractCegarLoop]: Abstraction has 2274 states and 3496 transitions. [2018-09-30 23:10:00,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:10:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 3496 transitions. [2018-09-30 23:10:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:10:00,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:10:00,882 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:10:00,882 INFO L423 AbstractCegarLoop]: === Iteration 68 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:10:00,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:10:00,883 INFO L82 PathProgramCache]: Analyzing trace with hash -916627202, now seen corresponding path program 1 times [2018-09-30 23:10:00,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:10:00,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:10:00,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:00,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:00,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:10:01,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:10:01,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:10:01,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:01,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:10:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:10:01,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:10:01,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2018-09-30 23:10:01,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:10:01,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:10:01,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:10:01,207 INFO L87 Difference]: Start difference. First operand 2274 states and 3496 transitions. Second operand 16 states. [2018-09-30 23:10:04,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:10:04,840 INFO L93 Difference]: Finished difference Result 2734 states and 4210 transitions. [2018-09-30 23:10:04,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:10:04,840 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2018-09-30 23:10:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:10:04,842 INFO L225 Difference]: With dead ends: 2734 [2018-09-30 23:10:04,843 INFO L226 Difference]: Without dead ends: 2732 [2018-09-30 23:10:04,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:10:04,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2018-09-30 23:10:06,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2357. [2018-09-30 23:10:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2357 states. [2018-09-30 23:10:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 3634 transitions. [2018-09-30 23:10:06,303 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 3634 transitions. Word has length 29 [2018-09-30 23:10:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:10:06,303 INFO L480 AbstractCegarLoop]: Abstraction has 2357 states and 3634 transitions. [2018-09-30 23:10:06,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:10:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 3634 transitions. [2018-09-30 23:10:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:10:06,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:10:06,304 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:10:06,305 INFO L423 AbstractCegarLoop]: === Iteration 69 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:10:06,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:10:06,305 INFO L82 PathProgramCache]: Analyzing trace with hash 524508242, now seen corresponding path program 1 times [2018-09-30 23:10:06,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:10:06,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:10:06,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:06,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:06,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:10:06,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:10:06,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:10:06,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:06,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:10:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:10:06,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:10:06,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-30 23:10:06,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:10:06,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:10:06,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:10:06,587 INFO L87 Difference]: Start difference. First operand 2357 states and 3634 transitions. Second operand 17 states. [2018-09-30 23:10:16,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:10:16,028 INFO L93 Difference]: Finished difference Result 5146 states and 8058 transitions. [2018-09-30 23:10:16,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:10:16,028 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2018-09-30 23:10:16,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:10:16,032 INFO L225 Difference]: With dead ends: 5146 [2018-09-30 23:10:16,032 INFO L226 Difference]: Without dead ends: 5144 [2018-09-30 23:10:16,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1591, Invalid=7915, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:10:16,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2018-09-30 23:10:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 3465. [2018-09-30 23:10:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3465 states. [2018-09-30 23:10:18,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5438 transitions. [2018-09-30 23:10:18,117 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 5438 transitions. Word has length 29 [2018-09-30 23:10:18,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:10:18,117 INFO L480 AbstractCegarLoop]: Abstraction has 3465 states and 5438 transitions. [2018-09-30 23:10:18,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:10:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 5438 transitions. [2018-09-30 23:10:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:10:18,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:10:18,119 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:10:18,119 INFO L423 AbstractCegarLoop]: === Iteration 70 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:10:18,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:10:18,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1958472419, now seen corresponding path program 4 times [2018-09-30 23:10:18,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:10:18,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:10:18,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:18,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:18,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:10:18,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:10:18,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:10:18,383 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:10:18,392 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:10:18,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:10:18,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:10:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:10:18,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:10:18,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-30 23:10:18,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:10:18,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:10:18,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:10:18,596 INFO L87 Difference]: Start difference. First operand 3465 states and 5438 transitions. Second operand 17 states. [2018-09-30 23:10:27,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:10:27,646 INFO L93 Difference]: Finished difference Result 4974 states and 7795 transitions. [2018-09-30 23:10:27,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:10:27,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2018-09-30 23:10:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:10:27,651 INFO L225 Difference]: With dead ends: 4974 [2018-09-30 23:10:27,651 INFO L226 Difference]: Without dead ends: 4972 [2018-09-30 23:10:27,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1292, Invalid=5350, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:10:27,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2018-09-30 23:10:29,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 3050. [2018-09-30 23:10:29,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3050 states. [2018-09-30 23:10:29,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 4722 transitions. [2018-09-30 23:10:29,651 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 4722 transitions. Word has length 29 [2018-09-30 23:10:29,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:10:29,651 INFO L480 AbstractCegarLoop]: Abstraction has 3050 states and 4722 transitions. [2018-09-30 23:10:29,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:10:29,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 4722 transitions. [2018-09-30 23:10:29,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 23:10:29,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:10:29,653 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:10:29,653 INFO L423 AbstractCegarLoop]: === Iteration 71 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:10:29,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:10:29,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1748672885, now seen corresponding path program 1 times [2018-09-30 23:10:29,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:10:29,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:10:29,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:29,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:10:29,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:10:29,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:10:29,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:10:29,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:29,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:10:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:10:30,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:10:30,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2018-09-30 23:10:30,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:10:30,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:10:30,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:10:30,137 INFO L87 Difference]: Start difference. First operand 3050 states and 4722 transitions. Second operand 24 states. [2018-09-30 23:10:51,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:10:51,024 INFO L93 Difference]: Finished difference Result 8298 states and 13026 transitions. [2018-09-30 23:10:51,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2018-09-30 23:10:51,025 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2018-09-30 23:10:51,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:10:51,033 INFO L225 Difference]: With dead ends: 8298 [2018-09-30 23:10:51,033 INFO L226 Difference]: Without dead ends: 8296 [2018-09-30 23:10:51,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18877 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=5438, Invalid=41868, Unknown=0, NotChecked=0, Total=47306 [2018-09-30 23:10:51,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8296 states. [2018-09-30 23:10:54,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8296 to 5309. [2018-09-30 23:10:54,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5309 states. [2018-09-30 23:10:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5309 states to 5309 states and 8285 transitions. [2018-09-30 23:10:54,047 INFO L78 Accepts]: Start accepts. Automaton has 5309 states and 8285 transitions. Word has length 31 [2018-09-30 23:10:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:10:54,047 INFO L480 AbstractCegarLoop]: Abstraction has 5309 states and 8285 transitions. [2018-09-30 23:10:54,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:10:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 5309 states and 8285 transitions. [2018-09-30 23:10:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:10:54,049 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:10:54,049 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2018-09-30 23:10:54,050 INFO L423 AbstractCegarLoop]: === Iteration 72 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:10:54,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:10:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2080043466, now seen corresponding path program 2 times [2018-09-30 23:10:54,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:10:54,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:10:54,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:54,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:54,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:10:54,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:10:54,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:10:54,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:10:54,818 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:10:54,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:10:54,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:10:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-30 23:10:55,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:10:55,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 25 [2018-09-30 23:10:55,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:10:55,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:10:55,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:10:55,012 INFO L87 Difference]: Start difference. First operand 5309 states and 8285 transitions. Second operand 25 states. [2018-09-30 23:11:02,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:11:02,848 INFO L93 Difference]: Finished difference Result 11346 states and 17672 transitions. [2018-09-30 23:11:02,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:11:02,848 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2018-09-30 23:11:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:11:02,853 INFO L225 Difference]: With dead ends: 11346 [2018-09-30 23:11:02,853 INFO L226 Difference]: Without dead ends: 6015 [2018-09-30 23:11:02,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=623, Invalid=3933, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:11:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6015 states. [2018-09-30 23:11:05,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6015 to 5268. [2018-09-30 23:11:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5268 states. [2018-09-30 23:11:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 8224 transitions. [2018-09-30 23:11:05,889 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 8224 transitions. Word has length 32 [2018-09-30 23:11:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:11:05,890 INFO L480 AbstractCegarLoop]: Abstraction has 5268 states and 8224 transitions. [2018-09-30 23:11:05,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:11:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 8224 transitions. [2018-09-30 23:11:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:11:05,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:11:05,892 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:11:05,892 INFO L423 AbstractCegarLoop]: === Iteration 73 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:11:05,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:11:05,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1941088948, now seen corresponding path program 1 times [2018-09-30 23:11:05,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:11:05,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:11:05,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:05,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:11:05,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:11:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:11:06,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:11:06,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:11:06,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:11:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:11:06,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:11:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:11:06,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:11:06,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 19 [2018-09-30 23:11:06,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:11:06,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:11:06,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:11:06,254 INFO L87 Difference]: Start difference. First operand 5268 states and 8224 transitions. Second operand 20 states. [2018-09-30 23:11:15,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:11:15,067 INFO L93 Difference]: Finished difference Result 6787 states and 10528 transitions. [2018-09-30 23:11:15,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:11:15,067 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2018-09-30 23:11:15,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:11:15,073 INFO L225 Difference]: With dead ends: 6787 [2018-09-30 23:11:15,073 INFO L226 Difference]: Without dead ends: 6785 [2018-09-30 23:11:15,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=528, Invalid=2894, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:11:15,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6785 states. [2018-09-30 23:11:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6785 to 5578. [2018-09-30 23:11:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5578 states. [2018-09-30 23:11:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 8706 transitions. [2018-09-30 23:11:18,635 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 8706 transitions. Word has length 32 [2018-09-30 23:11:18,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:11:18,636 INFO L480 AbstractCegarLoop]: Abstraction has 5578 states and 8706 transitions. [2018-09-30 23:11:18,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:11:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 8706 transitions. [2018-09-30 23:11:18,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:11:18,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:11:18,638 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:11:18,638 INFO L423 AbstractCegarLoop]: === Iteration 74 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:11:18,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:11:18,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1235175139, now seen corresponding path program 1 times [2018-09-30 23:11:18,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:11:18,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:11:18,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:18,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:11:18,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:11:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:11:18,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:11:18,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:11:18,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:11:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:11:18,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:11:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:11:18,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:11:18,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2018-09-30 23:11:18,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:11:18,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:11:18,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:11:18,914 INFO L87 Difference]: Start difference. First operand 5578 states and 8706 transitions. Second operand 17 states. [2018-09-30 23:11:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:11:24,711 INFO L93 Difference]: Finished difference Result 5917 states and 9225 transitions. [2018-09-30 23:11:24,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:11:24,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 23:11:24,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:11:24,717 INFO L225 Difference]: With dead ends: 5917 [2018-09-30 23:11:24,717 INFO L226 Difference]: Without dead ends: 5915 [2018-09-30 23:11:24,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:11:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2018-09-30 23:11:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 5610. [2018-09-30 23:11:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5610 states. [2018-09-30 23:11:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5610 states to 5610 states and 8755 transitions. [2018-09-30 23:11:28,566 INFO L78 Accepts]: Start accepts. Automaton has 5610 states and 8755 transitions. Word has length 32 [2018-09-30 23:11:28,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:11:28,566 INFO L480 AbstractCegarLoop]: Abstraction has 5610 states and 8755 transitions. [2018-09-30 23:11:28,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:11:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand 5610 states and 8755 transitions. [2018-09-30 23:11:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:11:28,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:11:28,570 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2018-09-30 23:11:28,570 INFO L423 AbstractCegarLoop]: === Iteration 75 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:11:28,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:11:28,570 INFO L82 PathProgramCache]: Analyzing trace with hash -243064214, now seen corresponding path program 2 times [2018-09-30 23:11:28,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:11:28,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:11:28,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:28,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:11:28,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:11:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:11:28,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:11:28,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:11:28,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:11:28,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:11:28,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:11:28,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:11:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 47 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-30 23:11:28,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:11:28,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 26 [2018-09-30 23:11:28,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:11:28,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:11:28,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:11:28,961 INFO L87 Difference]: Start difference. First operand 5610 states and 8755 transitions. Second operand 26 states. [2018-09-30 23:11:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:11:46,013 INFO L93 Difference]: Finished difference Result 18298 states and 28539 transitions. [2018-09-30 23:11:46,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:11:46,013 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 40 [2018-09-30 23:11:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:11:46,023 INFO L225 Difference]: With dead ends: 18298 [2018-09-30 23:11:46,023 INFO L226 Difference]: Without dead ends: 12604 [2018-09-30 23:11:46,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3584 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1841, Invalid=10369, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:11:46,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12604 states. [2018-09-30 23:11:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12604 to 10950. [2018-09-30 23:11:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10950 states. [2018-09-30 23:11:52,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10950 states to 10950 states and 16957 transitions. [2018-09-30 23:11:52,758 INFO L78 Accepts]: Start accepts. Automaton has 10950 states and 16957 transitions. Word has length 40 [2018-09-30 23:11:52,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:11:52,758 INFO L480 AbstractCegarLoop]: Abstraction has 10950 states and 16957 transitions. [2018-09-30 23:11:52,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:11:52,758 INFO L276 IsEmpty]: Start isEmpty. Operand 10950 states and 16957 transitions. [2018-09-30 23:11:52,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:11:52,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:11:52,763 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1] [2018-09-30 23:11:52,763 INFO L423 AbstractCegarLoop]: === Iteration 76 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:11:52,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:11:52,764 INFO L82 PathProgramCache]: Analyzing trace with hash -535149308, now seen corresponding path program 5 times [2018-09-30 23:11:52,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:11:52,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:11:52,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:52,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:11:52,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:11:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 98 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-30 23:11:52,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:11:52,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:11:52,915 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:11:52,932 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:11:52,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:11:52,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:11:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 60 proven. 18 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-09-30 23:11:53,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:11:53,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 22 [2018-09-30 23:11:53,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:11:53,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:11:53,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:11:53,159 INFO L87 Difference]: Start difference. First operand 10950 states and 16957 transitions. Second operand 22 states. [2018-09-30 23:12:06,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:12:06,889 INFO L93 Difference]: Finished difference Result 26523 states and 41066 transitions. [2018-09-30 23:12:06,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:12:06,890 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 40 [2018-09-30 23:12:06,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:12:06,906 INFO L225 Difference]: With dead ends: 26523 [2018-09-30 23:12:06,906 INFO L226 Difference]: Without dead ends: 15504 [2018-09-30 23:12:06,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=622, Invalid=4490, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:12:06,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15504 states. [2018-09-30 23:12:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15504 to 13604. [2018-09-30 23:12:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13604 states. [2018-09-30 23:12:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13604 states to 13604 states and 21162 transitions. [2018-09-30 23:12:15,017 INFO L78 Accepts]: Start accepts. Automaton has 13604 states and 21162 transitions. Word has length 40 [2018-09-30 23:12:15,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:12:15,018 INFO L480 AbstractCegarLoop]: Abstraction has 13604 states and 21162 transitions. [2018-09-30 23:12:15,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:12:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 13604 states and 21162 transitions. [2018-09-30 23:12:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:12:15,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:12:15,024 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1] [2018-09-30 23:12:15,025 INFO L423 AbstractCegarLoop]: === Iteration 77 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:12:15,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:12:15,025 INFO L82 PathProgramCache]: Analyzing trace with hash -825462232, now seen corresponding path program 6 times [2018-09-30 23:12:15,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:12:15,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:12:15,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:12:15,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:12:15,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:12:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:12:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 3 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:12:15,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:12:15,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:12:15,179 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:12:15,192 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 23:12:15,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:12:15,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:12:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 41 proven. 51 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-30 23:12:15,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:12:15,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2018-09-30 23:12:15,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:12:15,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:12:15,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:12:15,361 INFO L87 Difference]: Start difference. First operand 13604 states and 21162 transitions. Second operand 21 states. [2018-09-30 23:12:42,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:12:42,535 INFO L93 Difference]: Finished difference Result 38219 states and 59042 transitions. [2018-09-30 23:12:42,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-09-30 23:12:42,536 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 23:12:42,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:12:42,559 INFO L225 Difference]: With dead ends: 38219 [2018-09-30 23:12:42,559 INFO L226 Difference]: Without dead ends: 24368 [2018-09-30 23:12:42,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12379 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5678, Invalid=26542, Unknown=0, NotChecked=0, Total=32220 [2018-09-30 23:12:42,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24368 states. [2018-09-30 23:12:50,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24368 to 9167. [2018-09-30 23:12:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9167 states. [2018-09-30 23:12:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9167 states to 9167 states and 13526 transitions. [2018-09-30 23:12:50,156 INFO L78 Accepts]: Start accepts. Automaton has 9167 states and 13526 transitions. Word has length 40 [2018-09-30 23:12:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:12:50,156 INFO L480 AbstractCegarLoop]: Abstraction has 9167 states and 13526 transitions. [2018-09-30 23:12:50,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:12:50,156 INFO L276 IsEmpty]: Start isEmpty. Operand 9167 states and 13526 transitions. [2018-09-30 23:12:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:12:50,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:12:50,162 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:12:50,163 INFO L423 AbstractCegarLoop]: === Iteration 78 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:12:50,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:12:50,163 INFO L82 PathProgramCache]: Analyzing trace with hash -180478706, now seen corresponding path program 1 times [2018-09-30 23:12:50,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:12:50,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:12:50,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:12:50,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:12:50,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:12:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:12:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:12:50,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:12:50,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:12:50,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:12:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:12:50,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:12:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:12:50,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:12:50,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2018-09-30 23:12:50,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:12:50,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:12:50,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:12:50,832 INFO L87 Difference]: Start difference. First operand 9167 states and 13526 transitions. Second operand 27 states. [2018-09-30 23:13:10,364 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2018-09-30 23:13:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:13:27,475 INFO L93 Difference]: Finished difference Result 16946 states and 25287 transitions. [2018-09-30 23:13:27,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-09-30 23:13:27,475 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 42 [2018-09-30 23:13:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:13:27,493 INFO L225 Difference]: With dead ends: 16946 [2018-09-30 23:13:27,493 INFO L226 Difference]: Without dead ends: 16944 [2018-09-30 23:13:27,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11462 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=6032, Invalid=25120, Unknown=0, NotChecked=0, Total=31152 [2018-09-30 23:13:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16944 states. [2018-09-30 23:13:37,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16944 to 10564. [2018-09-30 23:13:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10564 states. [2018-09-30 23:13:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 15634 transitions. [2018-09-30 23:13:37,978 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 15634 transitions. Word has length 42 [2018-09-30 23:13:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:13:37,978 INFO L480 AbstractCegarLoop]: Abstraction has 10564 states and 15634 transitions. [2018-09-30 23:13:37,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:13:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 15634 transitions. [2018-09-30 23:13:37,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:13:37,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:13:37,986 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:13:37,986 INFO L423 AbstractCegarLoop]: === Iteration 79 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:13:37,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:13:37,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1371594221, now seen corresponding path program 1 times [2018-09-30 23:13:37,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:13:37,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:13:37,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:13:37,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:13:37,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:13:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:13:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:13:38,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:13:38,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:13:38,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:13:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:13:38,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:13:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:13:38,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:13:38,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-09-30 23:13:38,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:13:38,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:13:38,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:13:38,447 INFO L87 Difference]: Start difference. First operand 10564 states and 15634 transitions. Second operand 20 states. [2018-09-30 23:14:09,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:14:09,184 INFO L93 Difference]: Finished difference Result 20838 states and 30986 transitions. [2018-09-30 23:14:09,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:14:09,185 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2018-09-30 23:14:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:14:09,200 INFO L225 Difference]: With dead ends: 20838 [2018-09-30 23:14:09,200 INFO L226 Difference]: Without dead ends: 20836 [2018-09-30 23:14:09,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5563 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2332, Invalid=13670, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:14:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20836 states. [2018-09-30 23:14:21,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20836 to 11643. [2018-09-30 23:14:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11643 states. [2018-09-30 23:14:21,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11643 states to 11643 states and 17302 transitions. [2018-09-30 23:14:21,288 INFO L78 Accepts]: Start accepts. Automaton has 11643 states and 17302 transitions. Word has length 42 [2018-09-30 23:14:21,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:14:21,288 INFO L480 AbstractCegarLoop]: Abstraction has 11643 states and 17302 transitions. [2018-09-30 23:14:21,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:14:21,288 INFO L276 IsEmpty]: Start isEmpty. Operand 11643 states and 17302 transitions. [2018-09-30 23:14:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:14:21,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:14:21,296 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:14:21,296 INFO L423 AbstractCegarLoop]: === Iteration 80 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:14:21,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:14:21,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1715616855, now seen corresponding path program 1 times [2018-09-30 23:14:21,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:14:21,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:14:21,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:14:21,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:14:21,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:14:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:14:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 1 proven. 101 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:14:21,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:14:21,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:14:21,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:14:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:14:21,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:14:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 11 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:14:21,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:14:21,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-09-30 23:14:21,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:14:21,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:14:21,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:14:21,663 INFO L87 Difference]: Start difference. First operand 11643 states and 17302 transitions. Second operand 20 states. [2018-09-30 23:14:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:14:49,111 INFO L93 Difference]: Finished difference Result 17058 states and 25378 transitions. [2018-09-30 23:14:49,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:14:49,112 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2018-09-30 23:14:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:14:49,127 INFO L225 Difference]: With dead ends: 17058 [2018-09-30 23:14:49,127 INFO L226 Difference]: Without dead ends: 17056 [2018-09-30 23:14:49,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1534, Invalid=7972, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:14:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17056 states. [2018-09-30 23:15:01,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17056 to 11577. [2018-09-30 23:15:01,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11577 states. [2018-09-30 23:15:01,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11577 states to 11577 states and 17232 transitions. [2018-09-30 23:15:01,326 INFO L78 Accepts]: Start accepts. Automaton has 11577 states and 17232 transitions. Word has length 42 [2018-09-30 23:15:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:15:01,326 INFO L480 AbstractCegarLoop]: Abstraction has 11577 states and 17232 transitions. [2018-09-30 23:15:01,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:15:01,327 INFO L276 IsEmpty]: Start isEmpty. Operand 11577 states and 17232 transitions. [2018-09-30 23:15:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 23:15:01,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:15:01,333 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:15:01,333 INFO L423 AbstractCegarLoop]: === Iteration 81 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:15:01,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:15:01,333 INFO L82 PathProgramCache]: Analyzing trace with hash -937555222, now seen corresponding path program 1 times [2018-09-30 23:15:01,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:15:01,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:15:01,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:15:01,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:15:01,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:15:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:15:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-30 23:15:01,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:15:01,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:15:01,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:15:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:15:01,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:15:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-30 23:15:01,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:15:01,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2018-09-30 23:15:01,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:15:01,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:15:01,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:15:01,732 INFO L87 Difference]: Start difference. First operand 11577 states and 17232 transitions. Second operand 21 states. [2018-09-30 23:15:24,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:15:24,819 INFO L93 Difference]: Finished difference Result 26695 states and 39801 transitions. [2018-09-30 23:15:24,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:15:24,819 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2018-09-30 23:15:24,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:15:24,832 INFO L225 Difference]: With dead ends: 26695 [2018-09-30 23:15:24,832 INFO L226 Difference]: Without dead ends: 16206 [2018-09-30 23:15:24,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=934, Invalid=6038, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:15:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16206 states. [2018-09-30 23:15:37,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16206 to 13128. [2018-09-30 23:15:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13128 states. [2018-09-30 23:15:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13128 states to 13128 states and 19578 transitions. [2018-09-30 23:15:37,728 INFO L78 Accepts]: Start accepts. Automaton has 13128 states and 19578 transitions. Word has length 43 [2018-09-30 23:15:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:15:37,728 INFO L480 AbstractCegarLoop]: Abstraction has 13128 states and 19578 transitions. [2018-09-30 23:15:37,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:15:37,728 INFO L276 IsEmpty]: Start isEmpty. Operand 13128 states and 19578 transitions. [2018-09-30 23:15:37,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 23:15:37,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:15:37,734 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:15:37,734 INFO L423 AbstractCegarLoop]: === Iteration 82 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:15:37,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:15:37,734 INFO L82 PathProgramCache]: Analyzing trace with hash -531315181, now seen corresponding path program 1 times [2018-09-30 23:15:37,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:15:37,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:15:37,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:15:37,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:15:37,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:15:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:15:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 9 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:15:37,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:15:37,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:15:37,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:15:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:15:37,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:15:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-30 23:15:38,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:15:38,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 28 [2018-09-30 23:15:38,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:15:38,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:15:38,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:15:38,392 INFO L87 Difference]: Start difference. First operand 13128 states and 19578 transitions. Second operand 28 states. [2018-09-30 23:16:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:16:07,335 INFO L93 Difference]: Finished difference Result 29443 states and 43775 transitions. [2018-09-30 23:16:07,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:16:07,336 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 45 [2018-09-30 23:16:07,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:16:07,351 INFO L225 Difference]: With dead ends: 29443 [2018-09-30 23:16:07,352 INFO L226 Difference]: Without dead ends: 16258 [2018-09-30 23:16:07,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5224 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2481, Invalid=14549, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:16:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16258 states. [2018-09-30 23:16:17,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16258 to 10949. [2018-09-30 23:16:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10949 states. [2018-09-30 23:16:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10949 states to 10949 states and 16299 transitions. [2018-09-30 23:16:17,119 INFO L78 Accepts]: Start accepts. Automaton has 10949 states and 16299 transitions. Word has length 45 [2018-09-30 23:16:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:16:17,120 INFO L480 AbstractCegarLoop]: Abstraction has 10949 states and 16299 transitions. [2018-09-30 23:16:17,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:16:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 10949 states and 16299 transitions. [2018-09-30 23:16:17,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:16:17,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:16:17,123 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:16:17,124 INFO L423 AbstractCegarLoop]: === Iteration 83 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:16:17,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:16:17,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1920928118, now seen corresponding path program 2 times [2018-09-30 23:16:17,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:16:17,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:16:17,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:16:17,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:16:17,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:16:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:16:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-30 23:16:17,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:16:17,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:16:17,308 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:16:17,321 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:16:17,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:16:17,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:16:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-09-30 23:16:17,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:16:17,457 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2018-09-30 23:16:17,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:16:17,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:16:17,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:16:17,458 INFO L87 Difference]: Start difference. First operand 10949 states and 16299 transitions. Second operand 18 states. [2018-09-30 23:16:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:16:45,077 INFO L93 Difference]: Finished difference Result 33273 states and 49431 transitions. [2018-09-30 23:16:45,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-09-30 23:16:45,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2018-09-30 23:16:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:16:45,100 INFO L225 Difference]: With dead ends: 33273 [2018-09-30 23:16:45,101 INFO L226 Difference]: Without dead ends: 23081 [2018-09-30 23:16:45,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12509 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4577, Invalid=25873, Unknown=0, NotChecked=0, Total=30450 [2018-09-30 23:16:45,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23081 states. [2018-09-30 23:17:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23081 to 19195. [2018-09-30 23:17:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19195 states. [2018-09-30 23:17:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19195 states to 19195 states and 28265 transitions. [2018-09-30 23:17:02,658 INFO L78 Accepts]: Start accepts. Automaton has 19195 states and 28265 transitions. Word has length 46 [2018-09-30 23:17:02,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:02,659 INFO L480 AbstractCegarLoop]: Abstraction has 19195 states and 28265 transitions. [2018-09-30 23:17:02,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:17:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 19195 states and 28265 transitions. [2018-09-30 23:17:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:17:02,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:02,666 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:17:02,666 INFO L423 AbstractCegarLoop]: === Iteration 84 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:02,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:02,666 INFO L82 PathProgramCache]: Analyzing trace with hash -229853503, now seen corresponding path program 1 times [2018-09-30 23:17:02,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:02,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:02,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:02,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:02,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-30 23:17:02,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:02,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:02,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:17:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:02,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 71 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-09-30 23:17:03,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:03,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 22 [2018-09-30 23:17:03,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:17:03,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:17:03,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:17:03,150 INFO L87 Difference]: Start difference. First operand 19195 states and 28265 transitions. Second operand 22 states. [2018-09-30 23:17:30,249 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2018-09-30 23:17:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:48,022 INFO L93 Difference]: Finished difference Result 52342 states and 76616 transitions. [2018-09-30 23:17:48,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:17:48,023 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2018-09-30 23:17:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:48,051 INFO L225 Difference]: With dead ends: 52342 [2018-09-30 23:17:48,052 INFO L226 Difference]: Without dead ends: 32665 [2018-09-30 23:17:48,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3848 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1802, Invalid=11080, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:17:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32665 states. [2018-09-30 23:18:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32665 to 18776. [2018-09-30 23:18:06,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18776 states. [2018-09-30 23:18:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18776 states to 18776 states and 27562 transitions. [2018-09-30 23:18:06,502 INFO L78 Accepts]: Start accepts. Automaton has 18776 states and 27562 transitions. Word has length 46 [2018-09-30 23:18:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:18:06,502 INFO L480 AbstractCegarLoop]: Abstraction has 18776 states and 27562 transitions. [2018-09-30 23:18:06,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:18:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 18776 states and 27562 transitions. [2018-09-30 23:18:06,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 23:18:06,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:18:06,510 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:18:06,510 INFO L423 AbstractCegarLoop]: === Iteration 85 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:18:06,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:18:06,510 INFO L82 PathProgramCache]: Analyzing trace with hash 724108476, now seen corresponding path program 2 times [2018-09-30 23:18:06,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:18:06,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:18:06,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:06,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:18:06,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 69 proven. 9 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-09-30 23:18:06,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:18:06,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:18:06,705 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:18:06,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:18:06,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:18:06,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:18:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:18:06,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:18:06,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2018-09-30 23:18:06,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:18:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:18:06,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:18:06,989 INFO L87 Difference]: Start difference. First operand 18776 states and 27562 transitions. Second operand 24 states. [2018-09-30 23:19:05,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:05,615 INFO L93 Difference]: Finished difference Result 31989 states and 47097 transitions. [2018-09-30 23:19:05,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2018-09-30 23:19:05,615 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2018-09-30 23:19:05,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:05,642 INFO L225 Difference]: With dead ends: 31989 [2018-09-30 23:19:05,642 INFO L226 Difference]: Without dead ends: 31987 [2018-09-30 23:19:05,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16389 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=7563, Invalid=35909, Unknown=0, NotChecked=0, Total=43472 [2018-09-30 23:19:05,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31987 states. [2018-09-30 23:19:26,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31987 to 20921. [2018-09-30 23:19:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20921 states. [2018-09-30 23:19:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20921 states to 20921 states and 30756 transitions. [2018-09-30 23:19:26,739 INFO L78 Accepts]: Start accepts. Automaton has 20921 states and 30756 transitions. Word has length 49 [2018-09-30 23:19:26,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:26,739 INFO L480 AbstractCegarLoop]: Abstraction has 20921 states and 30756 transitions. [2018-09-30 23:19:26,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:19:26,740 INFO L276 IsEmpty]: Start isEmpty. Operand 20921 states and 30756 transitions. [2018-09-30 23:19:26,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 23:19:26,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:26,750 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 6, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1] [2018-09-30 23:19:26,750 INFO L423 AbstractCegarLoop]: === Iteration 86 === [productErr0ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:26,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:26,751 INFO L82 PathProgramCache]: Analyzing trace with hash 810098989, now seen corresponding path program 3 times [2018-09-30 23:19:26,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:26,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:26,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:26,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:26,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 27 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:19:27,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:27,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:27,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:27,125 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:19:27,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:27,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 2 proven. 132 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-30 23:19:27,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:27,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 34 [2018-09-30 23:19:27,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:19:27,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:19:27,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:19:27,426 INFO L87 Difference]: Start difference. First operand 20921 states and 30756 transitions. Second operand 35 states. [2018-09-30 23:20:24,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:24,463 INFO L93 Difference]: Finished difference Result 30368 states and 44770 transitions. [2018-09-30 23:20:24,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2018-09-30 23:20:24,463 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 51 [2018-09-30 23:20:24,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:24,489 INFO L225 Difference]: With dead ends: 30368 [2018-09-30 23:20:24,489 INFO L226 Difference]: Without dead ends: 30366 [2018-09-30 23:20:24,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18640 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=7858, Invalid=42094, Unknown=0, NotChecked=0, Total=49952 [2018-09-30 23:20:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30366 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown