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/AutomizerBpl.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181015-LoopsPathprograms/count_by_k_true-unreach-call_true-termination.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2d08e6e [2018-10-15 12:26:37,351 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-15 12:26:37,354 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-15 12:26:37,371 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-15 12:26:37,372 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-15 12:26:37,373 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-15 12:26:37,374 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-15 12:26:37,377 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-15 12:26:37,381 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-15 12:26:37,386 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-15 12:26:37,386 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-15 12:26:37,423 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-15 12:26:37,435 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-15 12:26:37,436 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-15 12:26:37,436 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-15 12:26:37,437 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-15 12:26:37,437 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-15 12:26:37,438 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-15 12:26:37,438 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-15 12:26:37,439 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-15 12:26:37,439 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-15 12:26:37,439 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-15 12:26:37,439 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-15 12:26:37,439 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-15 12:26:37,440 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-15 12:26:37,441 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-15 12:26:37,441 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-15 12:26:37,512 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-15 12:26:37,527 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-15 12:26:37,534 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-15 12:26:37,536 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-15 12:26:37,536 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-15 12:26:37,537 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181015-LoopsPathprograms/count_by_k_true-unreach-call_true-termination.i_3.bpl [2018-10-15 12:26:37,537 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181015-LoopsPathprograms/count_by_k_true-unreach-call_true-termination.i_3.bpl' [2018-10-15 12:26:37,595 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-15 12:26:37,596 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-15 12:26:37,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-15 12:26:37,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-15 12:26:37,597 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-15 12:26:37,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:26:37" (1/1) ... [2018-10-15 12:26:37,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:26:37" (1/1) ... [2018-10-15 12:26:37,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:26:37" (1/1) ... [2018-10-15 12:26:37,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:26:37" (1/1) ... [2018-10-15 12:26:37,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:26:37" (1/1) ... [2018-10-15 12:26:37,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:26:37" (1/1) ... [2018-10-15 12:26:37,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:26:37" (1/1) ... [2018-10-15 12:26:37,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-15 12:26:37,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-15 12:26:37,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-15 12:26:37,647 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-15 12:26:37,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:26:37" (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:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-15 12:26:37,721 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-15 12:26:37,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-15 12:26:37,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-15 12:26:37,928 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-15 12:26:37,929 INFO L202 PluginConnector]: Adding new model count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:26:37 BoogieIcfgContainer [2018-10-15 12:26:37,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-15 12:26:37,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-15 12:26:37,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-15 12:26:37,933 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-15 12:26:37,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 12:26:37" (1/2) ... [2018-10-15 12:26:37,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685642a8 and model type count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:26:37, skipping insertion in model container [2018-10-15 12:26:37,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k_true-unreach-call_true-termination.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:26:37" (2/2) ... [2018-10-15 12:26:37,936 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k_true-unreach-call_true-termination.i_3.bpl [2018-10-15 12:26:37,946 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-15 12:26:37,954 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-15 12:26:37,972 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-15 12:26:38,002 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-15 12:26:38,003 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-15 12:26:38,003 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-15 12:26:38,003 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-15 12:26:38,003 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-15 12:26:38,003 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-15 12:26:38,004 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-15 12:26:38,004 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-15 12:26:38,004 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-15 12:26:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-15 12:26:38,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-15 12:26:38,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:38,030 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:38,031 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:38,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:38,038 INFO L82 PathProgramCache]: Analyzing trace with hash -545477558, now seen corresponding path program 1 times [2018-10-15 12:26:38,097 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:38,527 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-15 12:26:38,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-15 12:26:38,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-15 12:26:38,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-15 12:26:38,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-15 12:26:38,546 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2018-10-15 12:26:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:38,987 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-15 12:26:38,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-15 12:26:38,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-10-15 12:26:38,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:39,001 INFO L225 Difference]: With dead ends: 22 [2018-10-15 12:26:39,001 INFO L226 Difference]: Without dead ends: 18 [2018-10-15 12:26:39,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-10-15 12:26:39,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-15 12:26:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-15 12:26:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-15 12:26:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-15 12:26:39,041 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-15 12:26:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:39,041 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-15 12:26:39,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-15 12:26:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-15 12:26:39,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-15 12:26:39,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:39,042 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:39,043 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:39,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:39,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1675078357, now seen corresponding path program 1 times [2018-10-15 12:26:39,044 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:39,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:26:39,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-15 12:26:39,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-15 12:26:39,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-15 12:26:39,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-15 12:26:39,161 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2018-10-15 12:26:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:39,276 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-15 12:26:39,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-15 12:26:39,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-10-15 12:26:39,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:39,277 INFO L225 Difference]: With dead ends: 22 [2018-10-15 12:26:39,278 INFO L226 Difference]: Without dead ends: 22 [2018-10-15 12:26:39,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-15 12:26:39,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-15 12:26:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-15 12:26:39,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-15 12:26:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-15 12:26:39,283 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 17 [2018-10-15 12:26:39,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:39,284 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-15 12:26:39,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-15 12:26:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-15 12:26:39,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-15 12:26:39,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:39,285 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:39,285 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:39,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:39,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1752720851, now seen corresponding path program 2 times [2018-10-15 12:26:39,286 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:39,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:26:39,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-15 12:26:39,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-15 12:26:39,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-15 12:26:39,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-15 12:26:39,482 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2018-10-15 12:26:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:39,848 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-15 12:26:39,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-15 12:26:39,848 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-10-15 12:26:39,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:39,849 INFO L225 Difference]: With dead ends: 26 [2018-10-15 12:26:39,850 INFO L226 Difference]: Without dead ends: 26 [2018-10-15 12:26:39,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-10-15 12:26:39,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-15 12:26:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-15 12:26:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-15 12:26:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-15 12:26:39,855 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 21 [2018-10-15 12:26:39,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:39,856 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-15 12:26:39,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-15 12:26:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-15 12:26:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-15 12:26:39,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:39,857 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:39,858 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:39,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:39,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1747415505, now seen corresponding path program 3 times [2018-10-15 12:26:39,860 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:40,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:26:40,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-15 12:26:40,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-15 12:26:40,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-15 12:26:40,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-15 12:26:40,292 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2018-10-15 12:26:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:40,684 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-15 12:26:40,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-15 12:26:40,685 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-10-15 12:26:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:40,686 INFO L225 Difference]: With dead ends: 30 [2018-10-15 12:26:40,686 INFO L226 Difference]: Without dead ends: 30 [2018-10-15 12:26:40,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2018-10-15 12:26:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-15 12:26:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-15 12:26:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-15 12:26:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-15 12:26:40,692 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 25 [2018-10-15 12:26:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:40,692 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-15 12:26:40,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-15 12:26:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-15 12:26:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-15 12:26:40,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:40,694 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:40,694 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:40,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:40,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1588310321, now seen corresponding path program 4 times [2018-10-15 12:26:40,695 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:41,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:26:41,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-15 12:26:41,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-15 12:26:41,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-15 12:26:41,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-15 12:26:41,300 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 11 states. [2018-10-15 12:26:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:41,775 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-15 12:26:41,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-15 12:26:41,779 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-10-15 12:26:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:41,780 INFO L225 Difference]: With dead ends: 34 [2018-10-15 12:26:41,780 INFO L226 Difference]: Without dead ends: 34 [2018-10-15 12:26:41,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2018-10-15 12:26:41,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-15 12:26:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-15 12:26:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-15 12:26:41,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-15 12:26:41,785 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 29 [2018-10-15 12:26:41,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:41,786 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-15 12:26:41,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-15 12:26:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-15 12:26:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-15 12:26:41,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:41,788 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:41,788 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:41,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:41,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1901167411, now seen corresponding path program 5 times [2018-10-15 12:26:41,789 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:42,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:26:42,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-15 12:26:42,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-15 12:26:42,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-15 12:26:42,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-15 12:26:42,020 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 13 states. [2018-10-15 12:26:42,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:42,695 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-15 12:26:42,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-15 12:26:42,695 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2018-10-15 12:26:42,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:42,698 INFO L225 Difference]: With dead ends: 38 [2018-10-15 12:26:42,698 INFO L226 Difference]: Without dead ends: 38 [2018-10-15 12:26:42,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2018-10-15 12:26:42,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-15 12:26:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-15 12:26:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-15 12:26:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-15 12:26:42,710 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 33 [2018-10-15 12:26:42,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:42,710 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-15 12:26:42,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-15 12:26:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-15 12:26:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-15 12:26:42,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:42,714 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:42,714 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:42,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:42,715 INFO L82 PathProgramCache]: Analyzing trace with hash 953844789, now seen corresponding path program 6 times [2018-10-15 12:26:42,717 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:43,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:26:43,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-15 12:26:43,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-15 12:26:43,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-15 12:26:43,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-15 12:26:43,024 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 15 states. [2018-10-15 12:26:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:43,765 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-15 12:26:43,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-15 12:26:43,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2018-10-15 12:26:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:43,774 INFO L225 Difference]: With dead ends: 42 [2018-10-15 12:26:43,774 INFO L226 Difference]: Without dead ends: 42 [2018-10-15 12:26:43,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2018-10-15 12:26:43,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-15 12:26:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-15 12:26:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-15 12:26:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-15 12:26:43,780 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 37 [2018-10-15 12:26:43,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:43,780 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-15 12:26:43,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-15 12:26:43,781 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-15 12:26:43,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-15 12:26:43,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:43,782 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:43,782 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:43,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:43,783 INFO L82 PathProgramCache]: Analyzing trace with hash 571946039, now seen corresponding path program 7 times [2018-10-15 12:26:43,784 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:44,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:26:44,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-15 12:26:44,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-15 12:26:44,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-15 12:26:44,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-15 12:26:44,143 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 17 states. [2018-10-15 12:26:44,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:44,939 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-15 12:26:44,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-15 12:26:44,941 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2018-10-15 12:26:44,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:44,942 INFO L225 Difference]: With dead ends: 46 [2018-10-15 12:26:44,942 INFO L226 Difference]: Without dead ends: 46 [2018-10-15 12:26:44,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=269, Invalid=661, Unknown=0, NotChecked=0, Total=930 [2018-10-15 12:26:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-15 12:26:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-15 12:26:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-15 12:26:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-15 12:26:44,948 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 41 [2018-10-15 12:26:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:44,949 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-15 12:26:44,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-15 12:26:44,949 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-15 12:26:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-15 12:26:44,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:44,950 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:44,950 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:44,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:44,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1114107079, now seen corresponding path program 8 times [2018-10-15 12:26:44,952 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:45,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:26:45,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-15 12:26:45,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-15 12:26:45,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-15 12:26:45,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-15 12:26:45,274 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 19 states. [2018-10-15 12:26:45,697 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 11 [2018-10-15 12:26:46,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:46,323 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-15 12:26:46,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-15 12:26:46,323 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2018-10-15 12:26:46,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:46,325 INFO L225 Difference]: With dead ends: 50 [2018-10-15 12:26:46,325 INFO L226 Difference]: Without dead ends: 50 [2018-10-15 12:26:46,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=339, Invalid=851, Unknown=0, NotChecked=0, Total=1190 [2018-10-15 12:26:46,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-15 12:26:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-15 12:26:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-15 12:26:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-15 12:26:46,331 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 45 [2018-10-15 12:26:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:46,331 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-15 12:26:46,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-15 12:26:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-15 12:26:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-15 12:26:46,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:46,333 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:46,333 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:46,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:46,333 INFO L82 PathProgramCache]: Analyzing trace with hash -542269125, now seen corresponding path program 9 times [2018-10-15 12:26:46,334 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:46,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:26:46,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-15 12:26:46,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-15 12:26:46,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-15 12:26:46,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-15 12:26:46,728 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 21 states. [2018-10-15 12:26:47,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:47,643 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-15 12:26:47,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-15 12:26:47,644 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2018-10-15 12:26:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:47,645 INFO L225 Difference]: With dead ends: 54 [2018-10-15 12:26:47,645 INFO L226 Difference]: Without dead ends: 54 [2018-10-15 12:26:47,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=417, Invalid=1065, Unknown=0, NotChecked=0, Total=1482 [2018-10-15 12:26:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-15 12:26:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-15 12:26:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-15 12:26:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-15 12:26:47,652 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 49 [2018-10-15 12:26:47,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:47,653 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-15 12:26:47,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-15 12:26:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-15 12:26:47,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-15 12:26:47,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:47,654 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:47,654 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:47,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:47,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1066901955, now seen corresponding path program 10 times [2018-10-15 12:26:47,655 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:47,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:26:47,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-15 12:26:47,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-15 12:26:47,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-15 12:26:47,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-15 12:26:47,994 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 23 states. [2018-10-15 12:26:49,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:49,148 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-15 12:26:49,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-15 12:26:49,149 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2018-10-15 12:26:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:49,150 INFO L225 Difference]: With dead ends: 58 [2018-10-15 12:26:49,150 INFO L226 Difference]: Without dead ends: 58 [2018-10-15 12:26:49,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2018-10-15 12:26:49,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-15 12:26:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-15 12:26:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-15 12:26:49,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-15 12:26:49,157 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 53 [2018-10-15 12:26:49,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:49,157 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-15 12:26:49,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-15 12:26:49,157 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-15 12:26:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-15 12:26:49,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:49,158 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:49,159 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:49,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:49,159 INFO L82 PathProgramCache]: Analyzing trace with hash 462998079, now seen corresponding path program 11 times [2018-10-15 12:26:49,160 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:49,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:26:49,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-15 12:26:49,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-15 12:26:49,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-15 12:26:49,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-15 12:26:49,612 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 25 states. [2018-10-15 12:26:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:51,245 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-15 12:26:51,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-15 12:26:51,246 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2018-10-15 12:26:51,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:51,247 INFO L225 Difference]: With dead ends: 62 [2018-10-15 12:26:51,247 INFO L226 Difference]: Without dead ends: 62 [2018-10-15 12:26:51,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2018-10-15 12:26:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-15 12:26:51,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-15 12:26:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-15 12:26:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-15 12:26:51,253 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 57 [2018-10-15 12:26:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:51,253 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-15 12:26:51,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-15 12:26:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-15 12:26:51,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-15 12:26:51,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:51,255 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:51,255 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:51,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:51,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1355769153, now seen corresponding path program 12 times [2018-10-15 12:26:51,256 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:51,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:26:51,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-15 12:26:51,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-15 12:26:51,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-15 12:26:51,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-15 12:26:51,974 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 27 states. [2018-10-15 12:26:53,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:53,473 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-15 12:26:53,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-15 12:26:53,474 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2018-10-15 12:26:53,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:53,474 INFO L225 Difference]: With dead ends: 66 [2018-10-15 12:26:53,475 INFO L226 Difference]: Without dead ends: 66 [2018-10-15 12:26:53,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=699, Invalid=1851, Unknown=0, NotChecked=0, Total=2550 [2018-10-15 12:26:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-15 12:26:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-15 12:26:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-15 12:26:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-15 12:26:53,482 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 61 [2018-10-15 12:26:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:53,482 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-15 12:26:53,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-15 12:26:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-15 12:26:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-15 12:26:53,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:53,484 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:53,484 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:53,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:53,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2091077821, now seen corresponding path program 13 times [2018-10-15 12:26:53,485 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:54,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:26:54,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-15 12:26:54,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-15 12:26:54,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-15 12:26:54,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-15 12:26:54,199 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 29 states. [2018-10-15 12:26:54,461 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 10 [2018-10-15 12:26:56,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:56,207 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-15 12:26:56,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-15 12:26:56,208 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2018-10-15 12:26:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:56,209 INFO L225 Difference]: With dead ends: 70 [2018-10-15 12:26:56,209 INFO L226 Difference]: Without dead ends: 70 [2018-10-15 12:26:56,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=809, Invalid=2161, Unknown=0, NotChecked=0, Total=2970 [2018-10-15 12:26:56,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-15 12:26:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-15 12:26:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-15 12:26:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-15 12:26:56,216 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 65 [2018-10-15 12:26:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:56,216 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-15 12:26:56,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-15 12:26:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-15 12:26:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-15 12:26:56,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:56,217 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:56,218 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:56,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:56,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1169086395, now seen corresponding path program 14 times [2018-10-15 12:26:56,219 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:26:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:26:57,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:26:57,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-15 12:26:57,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-15 12:26:57,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-15 12:26:57,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-15 12:26:57,146 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 31 states. [2018-10-15 12:26:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:26:59,230 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-15 12:26:59,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-15 12:26:59,230 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2018-10-15 12:26:59,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:26:59,231 INFO L225 Difference]: With dead ends: 74 [2018-10-15 12:26:59,231 INFO L226 Difference]: Without dead ends: 74 [2018-10-15 12:26:59,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=927, Invalid=2495, Unknown=0, NotChecked=0, Total=3422 [2018-10-15 12:26:59,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-15 12:26:59,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-15 12:26:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-15 12:26:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-15 12:26:59,239 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 69 [2018-10-15 12:26:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:26:59,240 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-15 12:26:59,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-15 12:26:59,240 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-15 12:26:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-15 12:26:59,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:26:59,241 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:26:59,241 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:26:59,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:26:59,242 INFO L82 PathProgramCache]: Analyzing trace with hash 8212551, now seen corresponding path program 15 times [2018-10-15 12:26:59,242 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:26:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:27:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:27:00,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:27:00,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-15 12:27:00,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-15 12:27:00,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-15 12:27:00,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-15 12:27:00,159 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 33 states. [2018-10-15 12:27:02,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:27:02,576 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-15 12:27:02,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-15 12:27:02,576 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2018-10-15 12:27:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:27:02,577 INFO L225 Difference]: With dead ends: 78 [2018-10-15 12:27:02,577 INFO L226 Difference]: Without dead ends: 78 [2018-10-15 12:27:02,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1053, Invalid=2853, Unknown=0, NotChecked=0, Total=3906 [2018-10-15 12:27:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-15 12:27:02,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-15 12:27:02,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-15 12:27:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-15 12:27:02,584 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 73 [2018-10-15 12:27:02,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:27:02,584 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-15 12:27:02,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-15 12:27:02,584 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-15 12:27:02,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-15 12:27:02,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:27:02,585 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:27:02,586 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:27:02,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:27:02,586 INFO L82 PathProgramCache]: Analyzing trace with hash -2072926391, now seen corresponding path program 16 times [2018-10-15 12:27:02,587 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:27:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:27:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:27:03,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:27:03,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-15 12:27:03,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-15 12:27:03,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-15 12:27:03,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-15 12:27:03,253 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 35 states. [2018-10-15 12:27:05,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:27:05,980 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-15 12:27:05,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-15 12:27:05,981 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2018-10-15 12:27:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:27:05,982 INFO L225 Difference]: With dead ends: 82 [2018-10-15 12:27:05,982 INFO L226 Difference]: Without dead ends: 82 [2018-10-15 12:27:05,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1187, Invalid=3235, Unknown=0, NotChecked=0, Total=4422 [2018-10-15 12:27:05,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-15 12:27:05,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-15 12:27:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-15 12:27:05,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-15 12:27:05,989 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 77 [2018-10-15 12:27:05,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:27:05,989 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-15 12:27:05,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-15 12:27:05,989 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-15 12:27:05,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-15 12:27:05,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:27:05,991 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:27:05,991 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:27:05,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:27:05,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1199657653, now seen corresponding path program 17 times [2018-10-15 12:27:05,993 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:27:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:27:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:27:07,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:27:07,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-15 12:27:07,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-15 12:27:07,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-15 12:27:07,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-15 12:27:07,429 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 37 states. [2018-10-15 12:27:10,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:27:10,152 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-15 12:27:10,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-15 12:27:10,153 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2018-10-15 12:27:10,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:27:10,154 INFO L225 Difference]: With dead ends: 86 [2018-10-15 12:27:10,154 INFO L226 Difference]: Without dead ends: 86 [2018-10-15 12:27:10,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1329, Invalid=3641, Unknown=0, NotChecked=0, Total=4970 [2018-10-15 12:27:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-15 12:27:10,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-15 12:27:10,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-15 12:27:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-15 12:27:10,160 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 81 [2018-10-15 12:27:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:27:10,160 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-15 12:27:10,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-15 12:27:10,160 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-15 12:27:10,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-15 12:27:10,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:27:10,163 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:27:10,163 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:27:10,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:27:10,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1924457037, now seen corresponding path program 18 times [2018-10-15 12:27:10,164 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:27:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:27:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:27:11,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:27:11,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-15 12:27:11,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-15 12:27:11,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-15 12:27:11,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-15 12:27:11,304 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 39 states. [2018-10-15 12:27:14,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:27:14,424 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-15 12:27:14,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-15 12:27:14,425 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 85 [2018-10-15 12:27:14,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:27:14,426 INFO L225 Difference]: With dead ends: 90 [2018-10-15 12:27:14,426 INFO L226 Difference]: Without dead ends: 90 [2018-10-15 12:27:14,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1479, Invalid=4071, Unknown=0, NotChecked=0, Total=5550 [2018-10-15 12:27:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-15 12:27:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-15 12:27:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-15 12:27:14,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-15 12:27:14,431 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 85 [2018-10-15 12:27:14,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:27:14,431 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-15 12:27:14,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-15 12:27:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-15 12:27:14,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-15 12:27:14,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:27:14,433 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:27:14,433 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:27:14,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:27:14,433 INFO L82 PathProgramCache]: Analyzing trace with hash 216319567, now seen corresponding path program 19 times [2018-10-15 12:27:14,434 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:27:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:27:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:27:15,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:27:15,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-15 12:27:15,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-15 12:27:15,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-15 12:27:15,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-15 12:27:15,295 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 41 states. [2018-10-15 12:27:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:27:18,879 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-15 12:27:18,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-15 12:27:18,880 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 89 [2018-10-15 12:27:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:27:18,881 INFO L225 Difference]: With dead ends: 94 [2018-10-15 12:27:18,881 INFO L226 Difference]: Without dead ends: 94 [2018-10-15 12:27:18,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1637, Invalid=4525, Unknown=0, NotChecked=0, Total=6162 [2018-10-15 12:27:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-15 12:27:18,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-15 12:27:18,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-15 12:27:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-15 12:27:18,886 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 89 [2018-10-15 12:27:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:27:18,887 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-15 12:27:18,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-15 12:27:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-15 12:27:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-15 12:27:18,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:27:18,888 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:27:18,888 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:27:18,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:27:18,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2069964463, now seen corresponding path program 20 times [2018-10-15 12:27:18,889 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:27:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:27:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:27:20,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:27:20,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-15 12:27:20,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-15 12:27:20,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-15 12:27:20,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-15 12:27:20,006 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 43 states. [2018-10-15 12:27:23,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:27:23,891 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-15 12:27:23,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-15 12:27:23,891 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 93 [2018-10-15 12:27:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:27:23,893 INFO L225 Difference]: With dead ends: 98 [2018-10-15 12:27:23,893 INFO L226 Difference]: Without dead ends: 98 [2018-10-15 12:27:23,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1803, Invalid=5003, Unknown=0, NotChecked=0, Total=6806 [2018-10-15 12:27:23,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-15 12:27:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-15 12:27:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-15 12:27:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-15 12:27:23,899 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 93 [2018-10-15 12:27:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:27:23,899 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-15 12:27:23,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-15 12:27:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-15 12:27:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-15 12:27:23,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:27:23,900 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:27:23,901 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:27:23,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:27:23,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1691116717, now seen corresponding path program 21 times [2018-10-15 12:27:23,902 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:27:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:27:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:27:25,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:27:25,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-15 12:27:25,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-15 12:27:25,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-15 12:27:25,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-15 12:27:25,121 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 45 states. [2018-10-15 12:27:29,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:27:29,573 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-15 12:27:29,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-15 12:27:29,575 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 97 [2018-10-15 12:27:29,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:27:29,576 INFO L225 Difference]: With dead ends: 102 [2018-10-15 12:27:29,576 INFO L226 Difference]: Without dead ends: 102 [2018-10-15 12:27:29,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1977, Invalid=5505, Unknown=0, NotChecked=0, Total=7482 [2018-10-15 12:27:29,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-15 12:27:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-15 12:27:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-15 12:27:29,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-15 12:27:29,579 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 97 [2018-10-15 12:27:29,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:27:29,579 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-15 12:27:29,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-15 12:27:29,579 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-15 12:27:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-15 12:27:29,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:27:29,580 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:27:29,581 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:27:29,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:27:29,581 INFO L82 PathProgramCache]: Analyzing trace with hash -172782507, now seen corresponding path program 22 times [2018-10-15 12:27:29,582 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:27:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:27:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:27:30,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:27:30,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-15 12:27:30,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-15 12:27:30,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-15 12:27:30,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-15 12:27:30,698 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 47 states. [2018-10-15 12:27:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:27:35,460 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-15 12:27:35,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-15 12:27:35,460 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 101 [2018-10-15 12:27:35,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:27:35,461 INFO L225 Difference]: With dead ends: 106 [2018-10-15 12:27:35,461 INFO L226 Difference]: Without dead ends: 106 [2018-10-15 12:27:35,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2159, Invalid=6031, Unknown=0, NotChecked=0, Total=8190 [2018-10-15 12:27:35,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-15 12:27:35,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-15 12:27:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-15 12:27:35,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-15 12:27:35,466 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 101 [2018-10-15 12:27:35,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:27:35,466 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-15 12:27:35,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-15 12:27:35,466 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-15 12:27:35,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-15 12:27:35,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:27:35,467 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:27:35,467 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:27:35,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:27:35,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1022307415, now seen corresponding path program 23 times [2018-10-15 12:27:35,468 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:27:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:27:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:27:36,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:27:36,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-15 12:27:36,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-15 12:27:36,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-15 12:27:36,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-15 12:27:36,778 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 49 states. [2018-10-15 12:27:37,413 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-10-15 12:27:37,684 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-10-15 12:27:41,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:27:41,980 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-15 12:27:41,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-15 12:27:41,981 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 105 [2018-10-15 12:27:41,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:27:41,982 INFO L225 Difference]: With dead ends: 110 [2018-10-15 12:27:41,982 INFO L226 Difference]: Without dead ends: 110 [2018-10-15 12:27:41,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2349, Invalid=6581, Unknown=0, NotChecked=0, Total=8930 [2018-10-15 12:27:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-15 12:27:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-15 12:27:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-15 12:27:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-15 12:27:41,985 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 105 [2018-10-15 12:27:41,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:27:41,985 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-15 12:27:41,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-15 12:27:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-15 12:27:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-15 12:27:41,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:27:41,986 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:27:41,986 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:27:41,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:27:41,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1031207769, now seen corresponding path program 24 times [2018-10-15 12:27:41,987 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:27:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:27:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:27:43,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:27:43,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-15 12:27:43,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-15 12:27:43,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-15 12:27:43,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-15 12:27:43,694 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 51 states. [2018-10-15 12:27:44,116 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-10-15 12:27:49,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:27:49,561 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-15 12:27:49,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-15 12:27:49,562 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 109 [2018-10-15 12:27:49,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:27:49,563 INFO L225 Difference]: With dead ends: 114 [2018-10-15 12:27:49,563 INFO L226 Difference]: Without dead ends: 114 [2018-10-15 12:27:49,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2547, Invalid=7155, Unknown=0, NotChecked=0, Total=9702 [2018-10-15 12:27:49,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-15 12:27:49,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-15 12:27:49,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-15 12:27:49,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-15 12:27:49,568 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 109 [2018-10-15 12:27:49,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:27:49,568 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-15 12:27:49,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-15 12:27:49,568 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-15 12:27:49,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-15 12:27:49,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:27:49,569 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:27:49,569 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:27:49,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:27:49,570 INFO L82 PathProgramCache]: Analyzing trace with hash 127629659, now seen corresponding path program 25 times [2018-10-15 12:27:49,570 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:27:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:27:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:27:50,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:27:50,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-15 12:27:50,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-15 12:27:50,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-15 12:27:50,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-15 12:27:50,988 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 53 states. [2018-10-15 12:27:51,317 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 10 [2018-10-15 12:27:51,438 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2018-10-15 12:27:51,563 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:27:51,690 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:27:51,825 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 12:27:57,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:27:57,244 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-10-15 12:27:57,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-15 12:27:57,247 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 113 [2018-10-15 12:27:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:27:57,248 INFO L225 Difference]: With dead ends: 118 [2018-10-15 12:27:57,248 INFO L226 Difference]: Without dead ends: 118 [2018-10-15 12:27:57,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2753, Invalid=7753, Unknown=0, NotChecked=0, Total=10506 [2018-10-15 12:27:57,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-15 12:27:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-15 12:27:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-15 12:27:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-15 12:27:57,253 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 113 [2018-10-15 12:27:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:27:57,253 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-15 12:27:57,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-15 12:27:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-15 12:27:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-15 12:27:57,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:27:57,254 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:27:57,255 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:27:57,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:27:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash 258811485, now seen corresponding path program 26 times [2018-10-15 12:27:57,256 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:27:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:27:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:27:59,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:27:59,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-15 12:27:59,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-15 12:27:59,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-15 12:27:59,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-15 12:27:59,321 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 55 states. [2018-10-15 12:27:59,659 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 10 [2018-10-15 12:27:59,779 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2018-10-15 12:27:59,908 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:28:00,432 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 12:28:06,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:28:06,201 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-15 12:28:06,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-15 12:28:06,201 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 117 [2018-10-15 12:28:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:28:06,203 INFO L225 Difference]: With dead ends: 122 [2018-10-15 12:28:06,203 INFO L226 Difference]: Without dead ends: 122 [2018-10-15 12:28:06,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2967, Invalid=8375, Unknown=0, NotChecked=0, Total=11342 [2018-10-15 12:28:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-15 12:28:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-15 12:28:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-15 12:28:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-15 12:28:06,208 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 117 [2018-10-15 12:28:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:28:06,208 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-15 12:28:06,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-15 12:28:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-15 12:28:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-15 12:28:06,209 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:28:06,209 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:28:06,209 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:28:06,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:28:06,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1287422559, now seen corresponding path program 27 times [2018-10-15 12:28:06,210 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:28:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:28:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:28:07,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:28:07,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-15 12:28:07,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-15 12:28:07,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-15 12:28:07,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-15 12:28:07,843 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 57 states. [2018-10-15 12:28:08,211 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 10 [2018-10-15 12:28:08,358 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-10-15 12:28:08,501 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:28:08,642 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:28:08,777 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:28:08,922 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:28:09,067 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:28:09,220 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:28:15,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:28:15,471 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-10-15 12:28:15,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-15 12:28:15,471 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 121 [2018-10-15 12:28:15,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:28:15,472 INFO L225 Difference]: With dead ends: 126 [2018-10-15 12:28:15,472 INFO L226 Difference]: Without dead ends: 126 [2018-10-15 12:28:15,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3189, Invalid=9021, Unknown=0, NotChecked=0, Total=12210 [2018-10-15 12:28:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-15 12:28:15,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-15 12:28:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-15 12:28:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-15 12:28:15,476 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 121 [2018-10-15 12:28:15,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:28:15,476 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-15 12:28:15,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-15 12:28:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-15 12:28:15,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-15 12:28:15,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:28:15,477 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:28:15,477 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:28:15,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:28:15,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1528434017, now seen corresponding path program 28 times [2018-10-15 12:28:15,478 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:28:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:28:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:28:17,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:28:17,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-15 12:28:17,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-15 12:28:17,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-15 12:28:17,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-15 12:28:17,268 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 59 states. [2018-10-15 12:28:17,639 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 10 [2018-10-15 12:28:17,775 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2018-10-15 12:28:17,923 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:28:18,076 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:28:18,223 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:28:18,371 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:28:18,566 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:28:18,736 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:28:18,890 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:28:19,048 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:28:25,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:28:25,810 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-10-15 12:28:25,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-15 12:28:25,811 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 125 [2018-10-15 12:28:25,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:28:25,812 INFO L225 Difference]: With dead ends: 130 [2018-10-15 12:28:25,813 INFO L226 Difference]: Without dead ends: 130 [2018-10-15 12:28:25,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=3419, Invalid=9691, Unknown=0, NotChecked=0, Total=13110 [2018-10-15 12:28:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-15 12:28:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-15 12:28:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-15 12:28:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-15 12:28:25,817 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 125 [2018-10-15 12:28:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:28:25,817 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-15 12:28:25,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-15 12:28:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-15 12:28:25,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-15 12:28:25,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:28:25,819 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:28:25,819 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:28:25,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:28:25,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1714010269, now seen corresponding path program 29 times [2018-10-15 12:28:25,820 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:28:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:28:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:28:27,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:28:27,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-15 12:28:27,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-15 12:28:27,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-15 12:28:27,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-15 12:28:27,842 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 61 states. [2018-10-15 12:28:28,216 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 10 [2018-10-15 12:28:28,357 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2018-10-15 12:28:28,504 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:28:28,677 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:28:28,863 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:28:29,031 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:28:29,187 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:28:29,350 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:28:29,515 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:28:29,681 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:28:29,847 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:28:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:28:36,894 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-15 12:28:36,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-15 12:28:36,895 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 129 [2018-10-15 12:28:36,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:28:36,896 INFO L225 Difference]: With dead ends: 134 [2018-10-15 12:28:36,896 INFO L226 Difference]: Without dead ends: 134 [2018-10-15 12:28:36,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3657, Invalid=10385, Unknown=0, NotChecked=0, Total=14042 [2018-10-15 12:28:36,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-15 12:28:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-15 12:28:36,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-15 12:28:36,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-15 12:28:36,900 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 129 [2018-10-15 12:28:36,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:28:36,900 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-15 12:28:36,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-15 12:28:36,900 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-15 12:28:36,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-15 12:28:36,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:28:36,901 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:28:36,901 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:28:36,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:28:36,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1275179109, now seen corresponding path program 30 times [2018-10-15 12:28:36,902 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:28:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:28:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:28:38,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:28:38,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-15 12:28:38,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-15 12:28:38,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-15 12:28:38,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-15 12:28:38,948 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 63 states. [2018-10-15 12:28:39,485 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 10 [2018-10-15 12:28:39,633 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-10-15 12:28:39,794 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:28:39,968 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:28:40,132 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:28:40,297 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:28:40,482 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:28:40,652 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:28:40,822 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:28:40,997 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:28:41,165 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:28:41,343 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:28:41,527 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:28:44,163 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 11 [2018-10-15 12:28:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:28:48,835 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-10-15 12:28:48,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-15 12:28:48,836 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 133 [2018-10-15 12:28:48,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:28:48,837 INFO L225 Difference]: With dead ends: 138 [2018-10-15 12:28:48,837 INFO L226 Difference]: Without dead ends: 138 [2018-10-15 12:28:48,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=3903, Invalid=11103, Unknown=0, NotChecked=0, Total=15006 [2018-10-15 12:28:48,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-15 12:28:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-15 12:28:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-15 12:28:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-15 12:28:48,841 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 133 [2018-10-15 12:28:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:28:48,842 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-15 12:28:48,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-15 12:28:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-15 12:28:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-15 12:28:48,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:28:48,843 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:28:48,843 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:28:48,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:28:48,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1200830361, now seen corresponding path program 31 times [2018-10-15 12:28:48,844 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:28:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:28:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:28:51,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:28:51,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-15 12:28:51,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-15 12:28:51,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-15 12:28:51,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-15 12:28:51,286 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 65 states. [2018-10-15 12:28:51,701 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 10 [2018-10-15 12:28:51,858 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2018-10-15 12:28:52,025 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:28:52,200 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:28:52,360 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:28:52,536 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:28:52,711 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:28:52,885 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:28:53,058 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:28:53,253 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:28:53,443 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:28:53,630 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:28:53,818 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:28:54,017 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:28:54,209 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:28:54,430 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:28:54,640 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 12:29:01,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:29:01,889 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-15 12:29:01,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-15 12:29:01,889 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 137 [2018-10-15 12:29:01,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:29:01,891 INFO L225 Difference]: With dead ends: 142 [2018-10-15 12:29:01,891 INFO L226 Difference]: Without dead ends: 142 [2018-10-15 12:29:01,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=4157, Invalid=11845, Unknown=0, NotChecked=0, Total=16002 [2018-10-15 12:29:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-15 12:29:01,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-15 12:29:01,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-15 12:29:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-15 12:29:01,896 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 137 [2018-10-15 12:29:01,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:29:01,896 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-15 12:29:01,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-15 12:29:01,896 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-15 12:29:01,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-15 12:29:01,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:29:01,897 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:29:01,897 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:29:01,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:29:01,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1235750761, now seen corresponding path program 32 times [2018-10-15 12:29:01,902 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:29:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:29:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:29:04,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:29:04,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-15 12:29:04,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-15 12:29:04,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-15 12:29:04,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-15 12:29:04,314 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 67 states. [2018-10-15 12:29:04,934 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 10 [2018-10-15 12:29:05,099 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2018-10-15 12:29:05,271 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:29:05,450 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:29:05,624 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:29:05,802 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:29:05,994 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:29:06,177 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:29:06,362 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:29:06,555 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:29:06,749 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:29:06,945 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:29:07,141 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:29:07,342 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:29:07,541 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:29:07,737 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:29:08,130 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:29:08,539 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 12:29:15,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:29:15,977 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-15 12:29:15,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-15 12:29:15,984 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 141 [2018-10-15 12:29:15,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:29:15,985 INFO L225 Difference]: With dead ends: 146 [2018-10-15 12:29:15,985 INFO L226 Difference]: Without dead ends: 146 [2018-10-15 12:29:15,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=4419, Invalid=12611, Unknown=0, NotChecked=0, Total=17030 [2018-10-15 12:29:15,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-15 12:29:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-15 12:29:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-15 12:29:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-15 12:29:15,989 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 141 [2018-10-15 12:29:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:29:15,989 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-15 12:29:15,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-15 12:29:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-15 12:29:15,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-15 12:29:15,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:29:15,990 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:29:15,990 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:29:15,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:29:15,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1375468181, now seen corresponding path program 33 times [2018-10-15 12:29:15,991 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:29:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:29:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:29:18,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:29:18,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-15 12:29:18,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-15 12:29:18,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-15 12:29:18,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-10-15 12:29:18,493 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 69 states. [2018-10-15 12:29:18,943 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 10 [2018-10-15 12:29:19,120 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-10-15 12:29:19,308 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:29:19,496 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:29:19,678 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:29:19,891 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:29:20,105 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:29:20,310 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:29:20,508 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:29:20,721 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:29:20,923 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:29:21,219 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:29:21,485 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:29:21,696 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:29:21,899 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:29:22,111 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:29:22,314 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:29:22,529 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:29:22,737 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:29:22,962 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:29:23,383 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 12:29:31,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:29:31,062 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-10-15 12:29:31,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-15 12:29:31,062 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 145 [2018-10-15 12:29:31,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:29:31,064 INFO L225 Difference]: With dead ends: 150 [2018-10-15 12:29:31,064 INFO L226 Difference]: Without dead ends: 150 [2018-10-15 12:29:31,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=4689, Invalid=13401, Unknown=0, NotChecked=0, Total=18090 [2018-10-15 12:29:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-15 12:29:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-15 12:29:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-15 12:29:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-15 12:29:31,068 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 145 [2018-10-15 12:29:31,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:29:31,068 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-15 12:29:31,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-15 12:29:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-15 12:29:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-15 12:29:31,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:29:31,070 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:29:31,070 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:29:31,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:29:31,070 INFO L82 PathProgramCache]: Analyzing trace with hash -141481363, now seen corresponding path program 34 times [2018-10-15 12:29:31,071 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:29:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:29:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:29:33,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:29:33,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-10-15 12:29:33,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-15 12:29:33,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-15 12:29:33,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-15 12:29:33,906 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 71 states. [2018-10-15 12:29:34,390 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 10 [2018-10-15 12:29:34,575 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2018-10-15 12:29:34,758 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:29:34,954 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:29:35,152 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:29:35,384 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:29:35,610 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:29:35,808 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:29:36,027 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:29:36,241 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:29:36,459 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:29:36,681 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:29:36,905 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:29:37,127 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:29:37,344 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:29:37,566 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:29:37,787 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:29:38,010 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:29:38,233 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:29:38,454 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:29:38,900 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:29:40,516 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 11 [2018-10-15 12:29:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:29:47,316 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-10-15 12:29:47,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-15 12:29:47,316 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 149 [2018-10-15 12:29:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:29:47,318 INFO L225 Difference]: With dead ends: 154 [2018-10-15 12:29:47,318 INFO L226 Difference]: Without dead ends: 154 [2018-10-15 12:29:47,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=4967, Invalid=14215, Unknown=0, NotChecked=0, Total=19182 [2018-10-15 12:29:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-15 12:29:47,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-15 12:29:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-15 12:29:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-15 12:29:47,322 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 149 [2018-10-15 12:29:47,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:29:47,322 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-15 12:29:47,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-15 12:29:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-15 12:29:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-15 12:29:47,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:29:47,324 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:29:47,324 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:29:47,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:29:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1138753937, now seen corresponding path program 35 times [2018-10-15 12:29:47,325 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:29:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:29:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:29:50,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:29:50,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-10-15 12:29:50,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-15 12:29:50,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-15 12:29:50,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-10-15 12:29:50,279 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 73 states. [2018-10-15 12:29:50,885 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 10 [2018-10-15 12:29:51,079 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2018-10-15 12:29:51,266 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:29:51,466 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:29:51,670 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:29:51,878 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:29:52,097 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:29:52,306 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:29:52,518 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:29:52,739 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:29:52,960 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:29:53,184 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:29:53,411 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:29:53,643 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:29:53,864 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:29:54,101 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:29:54,330 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:29:54,569 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:29:54,811 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:29:55,048 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:29:55,275 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:29:55,510 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:29:55,766 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:29:56,019 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:30:04,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:30:04,622 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-15 12:30:04,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-15 12:30:04,623 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 153 [2018-10-15 12:30:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:30:04,624 INFO L225 Difference]: With dead ends: 158 [2018-10-15 12:30:04,624 INFO L226 Difference]: Without dead ends: 158 [2018-10-15 12:30:04,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=5253, Invalid=15053, Unknown=0, NotChecked=0, Total=20306 [2018-10-15 12:30:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-15 12:30:04,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-15 12:30:04,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-15 12:30:04,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-15 12:30:04,629 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 153 [2018-10-15 12:30:04,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:30:04,629 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-15 12:30:04,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-15 12:30:04,629 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-15 12:30:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-15 12:30:04,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:30:04,630 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:30:04,630 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:30:04,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:30:04,631 INFO L82 PathProgramCache]: Analyzing trace with hash 893452657, now seen corresponding path program 36 times [2018-10-15 12:30:04,631 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:30:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:30:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:30:08,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:30:08,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-10-15 12:30:08,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-15 12:30:08,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-15 12:30:08,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-10-15 12:30:08,549 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 75 states. [2018-10-15 12:30:09,055 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 10 [2018-10-15 12:30:09,244 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-10-15 12:30:09,448 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:30:09,660 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:30:09,873 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:30:10,087 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:30:10,313 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:30:10,532 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:30:10,751 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:30:11,039 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:30:11,288 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:30:11,550 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:30:11,785 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:30:12,028 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:30:12,267 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:30:12,514 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:30:12,763 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:30:13,011 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:30:13,263 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:30:13,515 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:30:13,763 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:30:14,017 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:30:14,261 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:30:14,513 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:30:14,757 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:30:15,001 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:30:16,302 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-10-15 12:30:21,686 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 11 [2018-10-15 12:30:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:30:24,315 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-10-15 12:30:24,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-15 12:30:24,316 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 157 [2018-10-15 12:30:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:30:24,317 INFO L225 Difference]: With dead ends: 162 [2018-10-15 12:30:24,317 INFO L226 Difference]: Without dead ends: 162 [2018-10-15 12:30:24,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=5547, Invalid=15915, Unknown=0, NotChecked=0, Total=21462 [2018-10-15 12:30:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-15 12:30:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-15 12:30:24,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-15 12:30:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-10-15 12:30:24,322 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 157 [2018-10-15 12:30:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:30:24,322 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-10-15 12:30:24,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-15 12:30:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-10-15 12:30:24,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-15 12:30:24,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:30:24,323 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:30:24,323 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:30:24,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:30:24,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1615115123, now seen corresponding path program 37 times [2018-10-15 12:30:24,324 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:30:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:30:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:30:28,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:30:28,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-10-15 12:30:28,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-15 12:30:28,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-15 12:30:28,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-10-15 12:30:28,133 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 77 states. [2018-10-15 12:30:28,654 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 10 [2018-10-15 12:30:28,862 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2018-10-15 12:30:29,079 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 12:30:29,307 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 12:30:29,528 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:30:29,763 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:30:29,999 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:30:30,228 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:30:30,469 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:30:30,723 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:30:30,963 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:30:31,212 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:30:31,453 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:30:31,737 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:30:31,993 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:30:32,250 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:30:32,504 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:30:32,773 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:30:33,023 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:30:33,280 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:30:33,536 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:30:33,787 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:30:34,053 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:30:34,306 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:30:34,569 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:30:34,834 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:30:35,092 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:30:36,703 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-10-15 12:30:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:30:44,971 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-10-15 12:30:44,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-15 12:30:44,971 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 161 [2018-10-15 12:30:44,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:30:44,973 INFO L225 Difference]: With dead ends: 166 [2018-10-15 12:30:44,973 INFO L226 Difference]: Without dead ends: 166 [2018-10-15 12:30:44,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=5849, Invalid=16801, Unknown=0, NotChecked=0, Total=22650 [2018-10-15 12:30:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-15 12:30:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-15 12:30:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-15 12:30:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-10-15 12:30:44,976 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 161 [2018-10-15 12:30:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:30:44,976 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-10-15 12:30:44,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-15 12:30:44,977 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-10-15 12:30:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-15 12:30:44,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:30:44,977 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:30:44,977 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:30:44,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:30:44,978 INFO L82 PathProgramCache]: Analyzing trace with hash 507221109, now seen corresponding path program 38 times [2018-10-15 12:30:44,978 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:30:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:30:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:30:49,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:30:49,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-10-15 12:30:49,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-15 12:30:49,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-15 12:30:49,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-10-15 12:30:49,014 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 79 states. [2018-10-15 12:30:49,541 WARN L179 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 10 [2018-10-15 12:30:49,759 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2018-10-15 12:30:49,979 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 12:30:50,227 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 12:30:50,453 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 12:30:50,692 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 12:30:50,938 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:30:51,185 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:30:51,434 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:30:51,689 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:30:51,965 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:30:52,253 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:30:52,520 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:30:52,775 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:30:53,035 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:30:53,302 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:30:53,578 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:30:53,851 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:30:54,106 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:30:54,368 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:30:54,636 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:30:54,907 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:30:55,173 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:30:55,449 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:30:55,741 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:30:56,016 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:30:56,291 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:30:56,559 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:30:57,115 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:30:57,426 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 12:31:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:31:06,891 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-15 12:31:06,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-15 12:31:06,892 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 165 [2018-10-15 12:31:06,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:31:06,893 INFO L225 Difference]: With dead ends: 170 [2018-10-15 12:31:06,893 INFO L226 Difference]: Without dead ends: 170 [2018-10-15 12:31:06,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=6159, Invalid=17711, Unknown=0, NotChecked=0, Total=23870 [2018-10-15 12:31:06,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-15 12:31:06,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-10-15 12:31:06,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-15 12:31:06,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-10-15 12:31:06,898 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 165 [2018-10-15 12:31:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:31:06,898 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-10-15 12:31:06,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-15 12:31:06,898 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-10-15 12:31:06,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-15 12:31:06,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:31:06,899 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:31:06,899 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:31:06,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:31:06,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1408640119, now seen corresponding path program 39 times [2018-10-15 12:31:06,900 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:31:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:31:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:31:10,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:31:10,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-10-15 12:31:10,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-15 12:31:10,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-15 12:31:10,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-10-15 12:31:10,430 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 81 states. [2018-10-15 12:31:10,973 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 10 [2018-10-15 12:31:11,204 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 9 [2018-10-15 12:31:11,438 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 12:31:11,674 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 12:31:11,914 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 12:31:12,179 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 12:31:12,439 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 12:31:12,715 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 12:31:12,977 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:31:13,232 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:31:13,501 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:31:13,775 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:31:14,044 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:31:14,324 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:31:14,602 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:31:14,876 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:31:15,163 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:31:15,444 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:31:15,731 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:31:16,017 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:31:16,289 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:31:16,576 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:31:16,857 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:31:17,146 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:31:17,425 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:31:17,741 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:31:18,034 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:31:18,318 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:31:18,599 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:31:18,875 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:31:19,156 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:31:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:31:29,538 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2018-10-15 12:31:29,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-15 12:31:29,539 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 169 [2018-10-15 12:31:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:31:29,540 INFO L225 Difference]: With dead ends: 174 [2018-10-15 12:31:29,540 INFO L226 Difference]: Without dead ends: 174 [2018-10-15 12:31:29,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=6477, Invalid=18645, Unknown=0, NotChecked=0, Total=25122 [2018-10-15 12:31:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-15 12:31:29,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-10-15 12:31:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-15 12:31:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-10-15 12:31:29,545 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 169 [2018-10-15 12:31:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:31:29,545 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-10-15 12:31:29,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-15 12:31:29,545 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-10-15 12:31:29,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-15 12:31:29,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:31:29,546 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:31:29,547 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:31:29,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:31:29,547 INFO L82 PathProgramCache]: Analyzing trace with hash 168092537, now seen corresponding path program 40 times [2018-10-15 12:31:29,547 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:31:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:31:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:31:32,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:31:33,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-10-15 12:31:33,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-15 12:31:33,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-15 12:31:33,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-10-15 12:31:33,000 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 83 states. [2018-10-15 12:31:33,708 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 10 [2018-10-15 12:31:33,940 WARN L179 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 9 [2018-10-15 12:31:34,176 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 12:31:34,424 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 12:31:34,667 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 12:31:34,930 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 12:31:35,192 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 12:31:35,465 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 12:31:35,740 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 12:31:36,007 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 12:31:36,286 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:31:36,563 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:31:36,843 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:31:37,137 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:31:37,419 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:31:37,694 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:31:37,981 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:31:38,317 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:31:38,631 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:31:38,924 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:31:39,205 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:31:39,489 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:31:39,785 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:31:40,085 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:31:40,380 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:31:40,673 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:31:40,966 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:31:41,270 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:31:41,571 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:31:41,875 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:31:42,169 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:31:42,473 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:31:42,764 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:31:43,067 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:31:43,391 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 12:31:53,129 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-15 12:31:53,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:31:53,936 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-10-15 12:31:53,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-15 12:31:53,937 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 173 [2018-10-15 12:31:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:31:53,938 INFO L225 Difference]: With dead ends: 178 [2018-10-15 12:31:53,938 INFO L226 Difference]: Without dead ends: 178 [2018-10-15 12:31:53,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=6803, Invalid=19603, Unknown=0, NotChecked=0, Total=26406 [2018-10-15 12:31:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-15 12:31:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-10-15 12:31:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-15 12:31:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-10-15 12:31:53,943 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 173 [2018-10-15 12:31:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:31:53,943 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-10-15 12:31:53,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-15 12:31:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-10-15 12:31:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-15 12:31:53,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:31:53,944 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:31:53,944 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:31:53,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:31:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1934077573, now seen corresponding path program 41 times [2018-10-15 12:31:53,945 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:31:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:31:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:31:57,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:31:57,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-10-15 12:31:57,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-15 12:31:57,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-15 12:31:57,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2018-10-15 12:31:57,643 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 85 states. [2018-10-15 12:31:58,226 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 10 [2018-10-15 12:31:58,461 WARN L179 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 9 [2018-10-15 12:31:58,759 WARN L179 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 12:31:59,026 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 12:31:59,281 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 12:31:59,543 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 12:31:59,823 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 12:32:00,095 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 12:32:00,371 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 12:32:00,647 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 12:32:00,926 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 12:32:01,217 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 12:32:01,515 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:32:01,818 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:32:02,109 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:32:02,411 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:32:02,706 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:32:03,002 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:32:03,312 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:32:03,624 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:32:03,949 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:32:04,257 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:32:04,553 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:32:04,853 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:32:05,155 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:32:05,463 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:32:05,771 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:32:06,100 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:32:06,401 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:32:06,708 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:32:07,022 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:32:07,345 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:32:07,645 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:32:07,953 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:32:08,261 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:32:08,574 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:32:08,911 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 12:32:09,235 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 12:32:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:32:19,115 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-15 12:32:19,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-15 12:32:19,115 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 177 [2018-10-15 12:32:19,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:32:19,116 INFO L225 Difference]: With dead ends: 182 [2018-10-15 12:32:19,116 INFO L226 Difference]: Without dead ends: 182 [2018-10-15 12:32:19,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=7137, Invalid=20585, Unknown=0, NotChecked=0, Total=27722 [2018-10-15 12:32:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-15 12:32:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-10-15 12:32:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-15 12:32:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-10-15 12:32:19,120 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 177 [2018-10-15 12:32:19,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:32:19,121 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-10-15 12:32:19,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-15 12:32:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-10-15 12:32:19,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-15 12:32:19,122 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:32:19,122 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:32:19,122 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:32:19,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:32:19,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1943998851, now seen corresponding path program 42 times [2018-10-15 12:32:19,123 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:32:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:32:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:32:22,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:32:22,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-10-15 12:32:22,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-15 12:32:22,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-15 12:32:22,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2018-10-15 12:32:22,914 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 87 states. [2018-10-15 12:32:23,642 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 10 [2018-10-15 12:32:23,900 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 9 [2018-10-15 12:32:24,161 WARN L179 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 12:32:24,452 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 12:32:24,717 WARN L179 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 12:32:25,001 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 12:32:25,292 WARN L179 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 12:32:25,574 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 12:32:25,866 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 12:32:26,152 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 12:32:26,495 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 12:32:26,799 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 12:32:27,102 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 12:32:27,412 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 12:32:27,724 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:32:28,037 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:32:28,345 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:32:28,668 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:32:28,985 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:32:29,329 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:32:29,663 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:32:30,001 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:32:30,322 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:32:30,656 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:32:30,990 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:32:31,315 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:32:31,637 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:32:31,962 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:32:32,283 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:32:32,620 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:32:32,955 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:32:33,287 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:32:33,622 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:32:33,944 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:32:34,264 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:32:34,628 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:32:35,282 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:32:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:32:46,232 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2018-10-15 12:32:46,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-15 12:32:46,233 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 181 [2018-10-15 12:32:46,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:32:46,234 INFO L225 Difference]: With dead ends: 186 [2018-10-15 12:32:46,234 INFO L226 Difference]: Without dead ends: 186 [2018-10-15 12:32:46,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=7479, Invalid=21591, Unknown=0, NotChecked=0, Total=29070 [2018-10-15 12:32:46,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-15 12:32:46,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-10-15 12:32:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-10-15 12:32:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2018-10-15 12:32:46,238 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 181 [2018-10-15 12:32:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:32:46,239 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2018-10-15 12:32:46,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-15 12:32:46,239 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2018-10-15 12:32:46,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-15 12:32:46,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:32:46,240 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:32:46,240 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:32:46,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:32:46,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1007630975, now seen corresponding path program 43 times [2018-10-15 12:32:46,241 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:32:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:32:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:32:50,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:32:50,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-10-15 12:32:50,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-15 12:32:50,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-15 12:32:50,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2018-10-15 12:32:50,504 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 89 states. [2018-10-15 12:32:51,187 WARN L179 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 10 [2018-10-15 12:32:51,443 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 9 [2018-10-15 12:32:51,721 WARN L179 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-10-15 12:32:51,995 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-10-15 12:32:52,278 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 12:32:52,564 WARN L179 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 12:32:52,865 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 12:32:53,152 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 12:32:53,459 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 12:32:53,770 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 12:32:54,092 WARN L179 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 12:32:54,408 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 12:32:54,719 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 12:32:55,072 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 12:32:55,413 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 12:32:55,740 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 12:32:56,067 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:32:56,428 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:32:56,749 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:32:57,076 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:32:57,396 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:32:57,725 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:32:58,049 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:32:58,380 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:32:58,748 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:32:59,086 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:32:59,420 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:32:59,775 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:33:00,177 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:33:00,518 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:33:00,841 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:33:01,177 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:33:01,516 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:33:01,859 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:33:02,199 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:33:02,533 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:33:02,888 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:33:03,226 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:33:03,558 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:33:05,287 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-10-15 12:33:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:33:15,004 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-10-15 12:33:15,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-15 12:33:15,004 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 185 [2018-10-15 12:33:15,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:33:15,005 INFO L225 Difference]: With dead ends: 190 [2018-10-15 12:33:15,005 INFO L226 Difference]: Without dead ends: 190 [2018-10-15 12:33:15,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=7829, Invalid=22621, Unknown=0, NotChecked=0, Total=30450 [2018-10-15 12:33:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-15 12:33:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-10-15 12:33:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-15 12:33:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2018-10-15 12:33:15,009 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 185 [2018-10-15 12:33:15,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:33:15,009 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2018-10-15 12:33:15,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-15 12:33:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2018-10-15 12:33:15,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-15 12:33:15,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:33:15,011 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:33:15,011 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:33:15,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:33:15,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1947448705, now seen corresponding path program 44 times [2018-10-15 12:33:15,012 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:33:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:33:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:33:19,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:33:19,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-10-15 12:33:19,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-15 12:33:19,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-15 12:33:19,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2018-10-15 12:33:19,295 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 91 states. [2018-10-15 12:33:19,939 WARN L179 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 10 [2018-10-15 12:33:20,205 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 9 [2018-10-15 12:33:20,500 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-10-15 12:33:20,825 WARN L179 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-10-15 12:33:21,107 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-10-15 12:33:21,397 WARN L179 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-10-15 12:33:21,746 WARN L179 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 12:33:22,057 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 12:33:22,352 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 12:33:22,683 WARN L179 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 12:33:23,007 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 12:33:23,332 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 12:33:23,654 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 12:33:23,995 WARN L179 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 12:33:24,328 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 12:33:24,670 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 12:33:25,005 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 12:33:25,352 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 12:33:25,740 WARN L179 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:33:26,083 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:33:26,430 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:33:26,818 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:33:27,159 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:33:27,495 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:33:27,866 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:33:28,217 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:33:28,570 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:33:28,926 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:33:29,287 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:33:29,646 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:33:29,993 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:33:30,365 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:33:30,733 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:33:31,124 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:33:31,489 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:33:31,839 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:33:32,188 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:33:32,528 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:33:32,879 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:33:33,221 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:33:33,561 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:33:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:33:45,509 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-15 12:33:45,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-15 12:33:45,510 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 189 [2018-10-15 12:33:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:33:45,511 INFO L225 Difference]: With dead ends: 194 [2018-10-15 12:33:45,511 INFO L226 Difference]: Without dead ends: 194 [2018-10-15 12:33:45,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=8187, Invalid=23675, Unknown=0, NotChecked=0, Total=31862 [2018-10-15 12:33:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-15 12:33:45,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-10-15 12:33:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-15 12:33:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-10-15 12:33:45,516 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 189 [2018-10-15 12:33:45,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:33:45,516 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-10-15 12:33:45,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-15 12:33:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-10-15 12:33:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-15 12:33:45,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:33:45,517 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:33:45,517 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:33:45,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:33:45,517 INFO L82 PathProgramCache]: Analyzing trace with hash -813768829, now seen corresponding path program 45 times [2018-10-15 12:33:45,518 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:33:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:33:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:33:50,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:33:50,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-10-15 12:33:50,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-15 12:33:50,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-15 12:33:50,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2018-10-15 12:33:50,152 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 93 states. [2018-10-15 12:33:50,820 WARN L179 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 10 [2018-10-15 12:33:51,108 WARN L179 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 9 [2018-10-15 12:33:51,419 WARN L179 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-10-15 12:33:51,740 WARN L179 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-10-15 12:33:52,042 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-10-15 12:33:52,347 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-10-15 12:33:52,666 WARN L179 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-10-15 12:33:52,974 WARN L179 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-10-15 12:33:53,294 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 12:33:53,626 WARN L179 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 12:33:53,972 WARN L179 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 12:33:54,308 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 12:33:54,650 WARN L179 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 12:33:55,004 WARN L179 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 12:33:55,345 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 12:33:55,729 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 12:33:56,086 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 12:33:56,474 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 12:33:56,847 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 12:33:57,198 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 12:33:57,563 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:33:57,919 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:33:58,282 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:33:58,641 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:33:59,010 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:33:59,385 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:33:59,759 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:34:00,147 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:34:00,508 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:34:00,881 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:34:01,253 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:34:01,640 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:34:02,006 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:34:02,376 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:34:02,790 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:34:03,164 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:34:03,538 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:34:03,913 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:34:04,274 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:34:04,631 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:34:04,986 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:34:05,365 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:34:06,434 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-15 12:34:06,838 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-15 12:34:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:34:18,063 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2018-10-15 12:34:18,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-15 12:34:18,064 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 193 [2018-10-15 12:34:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:34:18,064 INFO L225 Difference]: With dead ends: 198 [2018-10-15 12:34:18,065 INFO L226 Difference]: Without dead ends: 198 [2018-10-15 12:34:18,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=8553, Invalid=24753, Unknown=0, NotChecked=0, Total=33306 [2018-10-15 12:34:18,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-15 12:34:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-10-15 12:34:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-10-15 12:34:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-10-15 12:34:18,067 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 193 [2018-10-15 12:34:18,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:34:18,068 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-10-15 12:34:18,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-15 12:34:18,068 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-10-15 12:34:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-15 12:34:18,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:34:18,069 INFO L375 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:34:18,069 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:34:18,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:34:18,069 INFO L82 PathProgramCache]: Analyzing trace with hash -849266555, now seen corresponding path program 46 times [2018-10-15 12:34:18,070 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:34:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:34:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:34:22,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:34:22,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-10-15 12:34:22,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-15 12:34:22,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-15 12:34:22,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2018-10-15 12:34:22,919 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 95 states. [2018-10-15 12:34:23,606 WARN L179 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 10 [2018-10-15 12:34:23,901 WARN L179 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 9 [2018-10-15 12:34:24,195 WARN L179 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-10-15 12:34:24,531 WARN L179 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-10-15 12:34:24,838 WARN L179 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-10-15 12:34:25,160 WARN L179 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-10-15 12:34:25,494 WARN L179 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-10-15 12:34:25,818 WARN L179 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-10-15 12:34:26,147 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-10-15 12:34:26,495 WARN L179 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-10-15 12:34:26,842 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 12:34:27,236 WARN L179 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 12:34:27,588 WARN L179 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 12:34:27,945 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 12:34:28,295 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 12:34:28,661 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 12:34:29,009 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 12:34:29,374 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 12:34:29,745 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 12:34:30,121 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 12:34:30,482 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 12:34:30,859 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 12:34:31,227 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:34:31,596 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:34:31,983 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:34:32,404 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:34:32,794 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:34:33,176 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:34:33,591 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:34:33,999 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:34:34,380 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:34:34,756 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:34:35,143 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:34:35,546 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:34:35,939 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:34:36,319 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:34:36,704 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:34:37,098 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:34:37,497 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:34:37,883 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:34:38,257 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:34:38,643 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:34:39,016 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:34:39,388 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:34:39,760 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:34:40,115 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-15 12:34:41,547 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-10-15 12:34:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 12:34:52,175 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-10-15 12:34:52,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-15 12:34:52,176 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 197 [2018-10-15 12:34:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 12:34:52,177 INFO L225 Difference]: With dead ends: 202 [2018-10-15 12:34:52,177 INFO L226 Difference]: Without dead ends: 202 [2018-10-15 12:34:52,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4186 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=8927, Invalid=25855, Unknown=0, NotChecked=0, Total=34782 [2018-10-15 12:34:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-10-15 12:34:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-10-15 12:34:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-10-15 12:34:52,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2018-10-15 12:34:52,180 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 197 [2018-10-15 12:34:52,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 12:34:52,180 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2018-10-15 12:34:52,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-15 12:34:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2018-10-15 12:34:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-15 12:34:52,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 12:34:52,181 INFO L375 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 12:34:52,181 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 12:34:52,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 12:34:52,182 INFO L82 PathProgramCache]: Analyzing trace with hash -259309433, now seen corresponding path program 47 times [2018-10-15 12:34:52,182 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 12:34:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 12:34:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 12:34:57,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 12:34:57,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-10-15 12:34:57,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-15 12:34:57,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-15 12:34:57,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2018-10-15 12:34:57,078 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 97 states. [2018-10-15 12:34:57,803 WARN L179 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 10 [2018-10-15 12:34:58,130 WARN L179 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 9 [2018-10-15 12:34:58,431 WARN L179 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-10-15 12:34:58,754 WARN L179 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-10-15 12:34:59,076 WARN L179 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-10-15 12:34:59,415 WARN L179 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-10-15 12:34:59,751 WARN L179 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-10-15 12:35:00,092 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-10-15 12:35:00,431 WARN L179 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-10-15 12:35:00,784 WARN L179 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-10-15 12:35:01,148 WARN L179 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-10-15 12:35:01,516 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-10-15 12:35:01,882 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-10-15 12:35:02,235 WARN L179 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-10-15 12:35:02,604 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-10-15 12:35:02,997 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-15 12:35:03,391 WARN L179 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-15 12:35:03,780 WARN L179 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-15 12:35:04,163 WARN L179 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-15 12:35:04,545 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-15 12:35:04,921 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-15 12:35:05,318 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-15 12:35:05,715 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-15 12:35:06,097 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-15 12:35:06,481 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-15 12:35:06,869 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-15 12:35:07,284 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-15 12:35:07,683 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-15 12:35:08,100 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-15 12:35:08,518 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-15 12:35:08,912 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-15 12:35:09,310 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-15 12:35:09,697 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-15 12:35:10,086 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-15 12:35:10,473 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-15 12:35:10,853 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-15 12:35:11,235 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-15 12:35:11,627 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-15 12:35:12,011 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-15 12:35:12,409 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-15 12:35:12,791 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-15 12:35:13,204 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-15 12:35:13,603 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-15 12:35:13,977 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-15 12:35:14,356 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-15 12:35:14,740 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-15 12:35:15,124 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-15 12:35:15,499 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11