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/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-502d2f4 [2018-10-12 20:44:23,355 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-12 20:44:23,357 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-12 20:44:23,369 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-12 20:44:23,370 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-12 20:44:23,371 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-12 20:44:23,372 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-12 20:44:23,374 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-12 20:44:23,376 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-12 20:44:23,377 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-12 20:44:23,378 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-12 20:44:23,402 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-12 20:44:23,412 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-12 20:44:23,412 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-12 20:44:23,413 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-12 20:44:23,413 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-12 20:44:23,413 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-12 20:44:23,414 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-12 20:44:23,414 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-12 20:44:23,415 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-12 20:44:23,415 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-12 20:44:23,415 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-12 20:44:23,415 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-12 20:44:23,415 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-12 20:44:23,416 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-12 20:44:23,417 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-12 20:44:23,417 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-12 20:44:23,461 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-12 20:44:23,474 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-12 20:44:23,477 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-12 20:44:23,479 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-12 20:44:23,479 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-12 20:44:23,480 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl [2018-10-12 20:44:23,481 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-free.i_5.bpl' [2018-10-12 20:44:23,541 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-12 20:44:23,543 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-12 20:44:23,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-12 20:44:23,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-12 20:44:23,544 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-12 20:44:23,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/1) ... [2018-10-12 20:44:23,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/1) ... [2018-10-12 20:44:23,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/1) ... [2018-10-12 20:44:23,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/1) ... [2018-10-12 20:44:23,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/1) ... [2018-10-12 20:44:23,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/1) ... [2018-10-12 20:44:23,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/1) ... [2018-10-12 20:44:23,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-12 20:44:23,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-12 20:44:23,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-12 20:44:23,599 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-12 20:44:23,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (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 [2018-10-12 20:44:23,662 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-12 20:44:23,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-12 20:44:23,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-12 20:44:24,130 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-12 20:44:24,131 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:44:24 BoogieIcfgContainer [2018-10-12 20:44:24,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-12 20:44:24,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-12 20:44:24,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-12 20:44:24,136 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-12 20:44:24,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/2) ... [2018-10-12 20:44:24,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1f1761 and model type 960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:44:24, skipping insertion in model container [2018-10-12 20:44:24,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-free.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:44:24" (2/2) ... [2018-10-12 20:44:24,140 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1_false-valid-free.i_5.bpl [2018-10-12 20:44:24,150 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-12 20:44:24,161 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-12 20:44:24,179 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-12 20:44:24,208 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-12 20:44:24,209 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-12 20:44:24,209 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-12 20:44:24,209 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-12 20:44:24,209 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-12 20:44:24,210 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-12 20:44:24,210 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-12 20:44:24,210 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-12 20:44:24,210 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-12 20:44:24,231 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2018-10-12 20:44:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-12 20:44:24,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:24,251 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:44:24,253 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:24,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:24,261 INFO L82 PathProgramCache]: Analyzing trace with hash -412527006, now seen corresponding path program 1 times [2018-10-12 20:44:24,326 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:44:25,442 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-12 20:44:25,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-10-12 20:44:25,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-12 20:44:25,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-12 20:44:25,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-12 20:44:25,468 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 14 states. [2018-10-12 20:44:26,079 WARN L178 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-12 20:44:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:27,020 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-12 20:44:27,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-12 20:44:27,023 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2018-10-12 20:44:27,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:27,036 INFO L225 Difference]: With dead ends: 74 [2018-10-12 20:44:27,036 INFO L226 Difference]: Without dead ends: 74 [2018-10-12 20:44:27,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2018-10-12 20:44:27,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-12 20:44:27,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2018-10-12 20:44:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-12 20:44:27,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-12 20:44:27,101 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 51 [2018-10-12 20:44:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:27,102 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-12 20:44:27,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-12 20:44:27,102 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-12 20:44:27,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-12 20:44:27,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:27,105 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:44:27,105 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:27,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:27,106 INFO L82 PathProgramCache]: Analyzing trace with hash 349139816, now seen corresponding path program 1 times [2018-10-12 20:44:27,107 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:44:27,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:27,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-12 20:44:27,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-12 20:44:27,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-12 20:44:27,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-10-12 20:44:27,676 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2018-10-12 20:44:28,316 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-10-12 20:44:29,417 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-12 20:44:29,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:29,580 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-12 20:44:29,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-12 20:44:29,580 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-12 20:44:29,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:29,583 INFO L225 Difference]: With dead ends: 86 [2018-10-12 20:44:29,583 INFO L226 Difference]: Without dead ends: 86 [2018-10-12 20:44:29,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2018-10-12 20:44:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-12 20:44:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-10-12 20:44:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-12 20:44:29,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-12 20:44:29,595 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 63 [2018-10-12 20:44:29,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:29,596 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-12 20:44:29,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-12 20:44:29,596 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-12 20:44:29,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-12 20:44:29,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:29,599 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:44:29,599 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:29,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:29,600 INFO L82 PathProgramCache]: Analyzing trace with hash -939247762, now seen corresponding path program 2 times [2018-10-12 20:44:29,601 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:44:30,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:30,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-12 20:44:30,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-12 20:44:30,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-12 20:44:30,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-12 20:44:30,150 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2018-10-12 20:44:31,020 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-10-12 20:44:31,612 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-12 20:44:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:32,227 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-12 20:44:32,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-12 20:44:32,228 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-12 20:44:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:32,230 INFO L225 Difference]: With dead ends: 98 [2018-10-12 20:44:32,230 INFO L226 Difference]: Without dead ends: 98 [2018-10-12 20:44:32,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2018-10-12 20:44:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-12 20:44:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2018-10-12 20:44:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-12 20:44:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-12 20:44:32,240 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 75 [2018-10-12 20:44:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:32,241 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-12 20:44:32,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-12 20:44:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-12 20:44:32,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-12 20:44:32,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:32,243 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:44:32,243 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:32,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:32,243 INFO L82 PathProgramCache]: Analyzing trace with hash 893723252, now seen corresponding path program 3 times [2018-10-12 20:44:32,244 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:44:32,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:32,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-12 20:44:32,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-12 20:44:32,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-12 20:44:32,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-10-12 20:44:32,868 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 22 states. [2018-10-12 20:44:34,685 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-12 20:44:35,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:35,473 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-12 20:44:35,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-12 20:44:35,473 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2018-10-12 20:44:35,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:35,476 INFO L225 Difference]: With dead ends: 110 [2018-10-12 20:44:35,477 INFO L226 Difference]: Without dead ends: 110 [2018-10-12 20:44:35,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2018-10-12 20:44:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-12 20:44:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-10-12 20:44:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-12 20:44:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-12 20:44:35,489 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 87 [2018-10-12 20:44:35,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:35,490 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-12 20:44:35,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-12 20:44:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-12 20:44:35,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-12 20:44:35,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:35,492 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:44:35,492 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:35,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:35,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1601194886, now seen corresponding path program 4 times [2018-10-12 20:44:35,494 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:44:36,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:36,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-12 20:44:36,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-12 20:44:36,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-12 20:44:36,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2018-10-12 20:44:36,053 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 24 states. [2018-10-12 20:44:38,920 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-10-12 20:44:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:39,019 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-12 20:44:39,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-12 20:44:39,025 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2018-10-12 20:44:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:39,028 INFO L225 Difference]: With dead ends: 122 [2018-10-12 20:44:39,028 INFO L226 Difference]: Without dead ends: 122 [2018-10-12 20:44:39,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2018-10-12 20:44:39,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-12 20:44:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2018-10-12 20:44:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-12 20:44:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-12 20:44:39,039 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 99 [2018-10-12 20:44:39,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:39,039 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-12 20:44:39,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-12 20:44:39,040 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-12 20:44:39,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-12 20:44:39,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:39,041 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:44:39,042 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:39,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:39,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1113494144, now seen corresponding path program 5 times [2018-10-12 20:44:39,043 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:44:40,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:40,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-12 20:44:40,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-12 20:44:40,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-12 20:44:40,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2018-10-12 20:44:40,117 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 28 states. [2018-10-12 20:44:42,076 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:44:42,582 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:44:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:43,725 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-12 20:44:43,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-12 20:44:43,726 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2018-10-12 20:44:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:43,728 INFO L225 Difference]: With dead ends: 134 [2018-10-12 20:44:43,728 INFO L226 Difference]: Without dead ends: 134 [2018-10-12 20:44:43,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1004, Invalid=3156, Unknown=0, NotChecked=0, Total=4160 [2018-10-12 20:44:43,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-12 20:44:43,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2018-10-12 20:44:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-12 20:44:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-12 20:44:43,738 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 111 [2018-10-12 20:44:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:43,738 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-12 20:44:43,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-12 20:44:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-12 20:44:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-12 20:44:43,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:43,741 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:44:43,741 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:43,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:43,741 INFO L82 PathProgramCache]: Analyzing trace with hash 267898246, now seen corresponding path program 6 times [2018-10-12 20:44:43,742 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:44:44,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:44,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-12 20:44:44,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-12 20:44:44,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-12 20:44:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2018-10-12 20:44:44,800 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 30 states. [2018-10-12 20:44:46,623 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2018-10-12 20:44:47,186 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 20:44:47,345 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:44:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:48,976 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-12 20:44:48,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-12 20:44:48,976 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2018-10-12 20:44:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:48,978 INFO L225 Difference]: With dead ends: 146 [2018-10-12 20:44:48,978 INFO L226 Difference]: Without dead ends: 146 [2018-10-12 20:44:48,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1064, Invalid=3628, Unknown=0, NotChecked=0, Total=4692 [2018-10-12 20:44:48,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-12 20:44:48,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-12 20:44:48,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-12 20:44:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-12 20:44:48,988 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 123 [2018-10-12 20:44:48,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:48,989 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-12 20:44:48,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-12 20:44:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-12 20:44:48,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-12 20:44:48,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:48,991 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:44:48,992 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:48,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:48,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1255167116, now seen corresponding path program 7 times [2018-10-12 20:44:48,993 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:44:49,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:49,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-12 20:44:49,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-12 20:44:49,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-12 20:44:49,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2018-10-12 20:44:49,928 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 32 states. [2018-10-12 20:44:50,621 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-12 20:44:53,402 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:44:55,449 WARN L178 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-10-12 20:44:56,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:56,077 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-12 20:44:56,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-12 20:44:56,078 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-12 20:44:56,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:56,080 INFO L225 Difference]: With dead ends: 158 [2018-10-12 20:44:56,080 INFO L226 Difference]: Without dead ends: 158 [2018-10-12 20:44:56,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2018-10-12 20:44:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-12 20:44:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2018-10-12 20:44:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-12 20:44:56,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-12 20:44:56,088 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 135 [2018-10-12 20:44:56,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:56,089 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-12 20:44:56,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-12 20:44:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-12 20:44:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-12 20:44:56,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:56,091 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:44:56,091 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:56,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:56,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1322745198, now seen corresponding path program 8 times [2018-10-12 20:44:56,092 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:56,620 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-12 20:44:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:44:57,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:57,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-12 20:44:57,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-12 20:44:57,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-12 20:44:57,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-10-12 20:44:57,707 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 32 states. [2018-10-12 20:45:01,955 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-12 20:45:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:45:02,966 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-12 20:45:02,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-12 20:45:02,967 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2018-10-12 20:45:02,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:45:02,969 INFO L225 Difference]: With dead ends: 170 [2018-10-12 20:45:02,969 INFO L226 Difference]: Without dead ends: 170 [2018-10-12 20:45:02,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=927, Invalid=4623, Unknown=0, NotChecked=0, Total=5550 [2018-10-12 20:45:02,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-12 20:45:02,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2018-10-12 20:45:02,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-12 20:45:02,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-12 20:45:02,977 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 147 [2018-10-12 20:45:02,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:45:02,978 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-12 20:45:02,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-12 20:45:02,978 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-12 20:45:02,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-12 20:45:02,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:45:02,980 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:45:02,980 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:45:02,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:45:02,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1975375768, now seen corresponding path program 9 times [2018-10-12 20:45:02,982 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:45:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:45:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:45:03,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:45:03,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-12 20:45:03,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-12 20:45:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-12 20:45:03,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-12 20:45:03,821 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 36 states. [2018-10-12 20:45:07,222 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:45:08,332 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:45:09,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:45:09,801 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-12 20:45:09,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-12 20:45:09,802 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2018-10-12 20:45:09,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:45:09,803 INFO L225 Difference]: With dead ends: 182 [2018-10-12 20:45:09,804 INFO L226 Difference]: Without dead ends: 182 [2018-10-12 20:45:09,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1890, Invalid=5942, Unknown=0, NotChecked=0, Total=7832 [2018-10-12 20:45:09,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-12 20:45:09,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2018-10-12 20:45:09,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-12 20:45:09,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-12 20:45:09,810 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 159 [2018-10-12 20:45:09,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:45:09,811 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-12 20:45:09,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-12 20:45:09,811 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-12 20:45:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-12 20:45:09,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:45:09,818 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:45:09,818 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:45:09,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:45:09,818 INFO L82 PathProgramCache]: Analyzing trace with hash 453890974, now seen corresponding path program 10 times [2018-10-12 20:45:09,819 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:45:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:45:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:45:10,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:45:10,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-12 20:45:10,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-12 20:45:10,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-12 20:45:10,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2018-10-12 20:45:10,819 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 38 states. [2018-10-12 20:45:13,247 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 20:45:13,796 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:14,338 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:14,521 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:45:15,151 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:45:15,554 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:16,115 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:17,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:45:17,696 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-12 20:45:17,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-12 20:45:17,697 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 171 [2018-10-12 20:45:17,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:45:17,698 INFO L225 Difference]: With dead ends: 194 [2018-10-12 20:45:17,698 INFO L226 Difference]: Without dead ends: 194 [2018-10-12 20:45:17,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1966, Invalid=6590, Unknown=0, NotChecked=0, Total=8556 [2018-10-12 20:45:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-12 20:45:17,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2018-10-12 20:45:17,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-12 20:45:17,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-12 20:45:17,705 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 171 [2018-10-12 20:45:17,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:45:17,706 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-12 20:45:17,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-12 20:45:17,706 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-12 20:45:17,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-12 20:45:17,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:45:17,708 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:45:17,708 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:45:17,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:45:17,709 INFO L82 PathProgramCache]: Analyzing trace with hash -749341020, now seen corresponding path program 11 times [2018-10-12 20:45:17,709 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:45:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:45:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:45:18,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:45:18,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-12 20:45:18,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-12 20:45:18,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-12 20:45:18,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2018-10-12 20:45:18,634 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 40 states. [2018-10-12 20:45:22,398 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:45:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:45:26,195 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-10-12 20:45:26,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-12 20:45:26,196 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 183 [2018-10-12 20:45:26,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:45:26,198 INFO L225 Difference]: With dead ends: 206 [2018-10-12 20:45:26,198 INFO L226 Difference]: Without dead ends: 206 [2018-10-12 20:45:26,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2435, Invalid=7665, Unknown=0, NotChecked=0, Total=10100 [2018-10-12 20:45:26,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-12 20:45:26,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2018-10-12 20:45:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-12 20:45:26,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-12 20:45:26,204 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 183 [2018-10-12 20:45:26,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:45:26,204 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-12 20:45:26,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-12 20:45:26,205 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-12 20:45:26,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-12 20:45:26,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:45:26,206 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:45:26,207 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:45:26,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:45:26,207 INFO L82 PathProgramCache]: Analyzing trace with hash -527187798, now seen corresponding path program 12 times [2018-10-12 20:45:26,208 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:45:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:45:27,623 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-12 20:45:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:45:28,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:45:28,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-12 20:45:28,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-12 20:45:28,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-12 20:45:28,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2018-10-12 20:45:28,753 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 42 states. [2018-10-12 20:45:32,534 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-12 20:45:32,766 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:45:32,938 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-12 20:45:33,301 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:45:33,470 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:45:33,911 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:45:34,091 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:45:34,546 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:45:34,723 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-12 20:45:35,171 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-12 20:45:35,342 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-12 20:45:35,671 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-12 20:45:36,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:45:36,989 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-12 20:45:36,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-12 20:45:36,990 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2018-10-12 20:45:36,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:45:36,991 INFO L225 Difference]: With dead ends: 218 [2018-10-12 20:45:36,991 INFO L226 Difference]: Without dead ends: 218 [2018-10-12 20:45:36,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2185, Invalid=8321, Unknown=0, NotChecked=0, Total=10506 [2018-10-12 20:45:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-12 20:45:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2018-10-12 20:45:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-12 20:45:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-12 20:45:36,996 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 195 [2018-10-12 20:45:36,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:45:36,997 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-12 20:45:36,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-12 20:45:36,997 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-12 20:45:36,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-12 20:45:36,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:45:36,998 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:45:36,999 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:45:36,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:45:36,999 INFO L82 PathProgramCache]: Analyzing trace with hash -192630352, now seen corresponding path program 13 times [2018-10-12 20:45:37,000 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:45:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:45:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:45:38,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:45:38,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-12 20:45:38,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-12 20:45:38,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-12 20:45:38,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2018-10-12 20:45:38,423 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 44 states. [2018-10-12 20:45:41,960 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:45:42,125 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:45:42,913 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-12 20:45:43,087 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:45:47,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:45:47,076 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-10-12 20:45:47,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-12 20:45:47,077 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 207 [2018-10-12 20:45:47,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:45:47,079 INFO L225 Difference]: With dead ends: 230 [2018-10-12 20:45:47,079 INFO L226 Difference]: Without dead ends: 230 [2018-10-12 20:45:47,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3048, Invalid=9608, Unknown=0, NotChecked=0, Total=12656 [2018-10-12 20:45:47,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-12 20:45:47,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-10-12 20:45:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-12 20:45:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-12 20:45:47,084 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 207 [2018-10-12 20:45:47,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:45:47,084 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-12 20:45:47,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-12 20:45:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-12 20:45:47,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-12 20:45:47,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:45:47,085 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:45:47,086 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:45:47,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:45:47,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1868150346, now seen corresponding path program 14 times [2018-10-12 20:45:47,086 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:45:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:45:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:45:48,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:45:48,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-12 20:45:48,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-12 20:45:48,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-12 20:45:48,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2018-10-12 20:45:48,555 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 46 states. [2018-10-12 20:45:51,288 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:45:51,718 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:51,862 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:45:52,248 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:53,470 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:54,056 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:54,655 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:54,826 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:45:55,263 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:55,449 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:45:56,566 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:58,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:45:58,193 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-10-12 20:45:58,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-12 20:45:58,193 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2018-10-12 20:45:58,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:45:58,195 INFO L225 Difference]: With dead ends: 242 [2018-10-12 20:45:58,195 INFO L226 Difference]: Without dead ends: 242 [2018-10-12 20:45:58,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3140, Invalid=10432, Unknown=0, NotChecked=0, Total=13572 [2018-10-12 20:45:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-12 20:45:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2018-10-12 20:45:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-12 20:45:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-12 20:45:58,201 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 219 [2018-10-12 20:45:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:45:58,201 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-12 20:45:58,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-12 20:45:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-12 20:45:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-12 20:45:58,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:45:58,203 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:45:58,203 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:45:58,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:45:58,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1714817212, now seen corresponding path program 15 times [2018-10-12 20:45:58,204 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:45:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:45:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:45:59,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:45:59,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-12 20:45:59,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-12 20:45:59,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-12 20:45:59,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2018-10-12 20:45:59,641 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 48 states. [2018-10-12 20:46:03,486 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:46:08,426 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:46:08,681 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-12 20:46:09,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:46:09,655 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-10-12 20:46:09,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-12 20:46:09,655 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2018-10-12 20:46:09,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:46:09,657 INFO L225 Difference]: With dead ends: 254 [2018-10-12 20:46:09,657 INFO L226 Difference]: Without dead ends: 254 [2018-10-12 20:46:09,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=3729, Invalid=11771, Unknown=0, NotChecked=0, Total=15500 [2018-10-12 20:46:09,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-12 20:46:09,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2018-10-12 20:46:09,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-12 20:46:09,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-12 20:46:09,663 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 231 [2018-10-12 20:46:09,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:46:09,664 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-12 20:46:09,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-12 20:46:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-12 20:46:09,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-12 20:46:09,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:46:09,666 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:46:09,666 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:46:09,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:46:09,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1238274366, now seen corresponding path program 16 times [2018-10-12 20:46:09,667 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:46:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:46:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:46:11,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:46:11,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-12 20:46:11,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-12 20:46:11,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-12 20:46:11,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2018-10-12 20:46:11,332 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 48 states. [2018-10-12 20:46:22,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:46:22,126 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2018-10-12 20:46:22,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-12 20:46:22,127 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 243 [2018-10-12 20:46:22,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:46:22,128 INFO L225 Difference]: With dead ends: 266 [2018-10-12 20:46:22,128 INFO L226 Difference]: Without dead ends: 266 [2018-10-12 20:46:22,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1535, Invalid=11575, Unknown=0, NotChecked=0, Total=13110 [2018-10-12 20:46:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-12 20:46:22,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2018-10-12 20:46:22,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-12 20:46:22,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-12 20:46:22,134 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 243 [2018-10-12 20:46:22,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:46:22,135 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-12 20:46:22,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-12 20:46:22,135 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-12 20:46:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-12 20:46:22,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:46:22,136 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:46:22,137 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:46:22,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:46:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1319765048, now seen corresponding path program 17 times [2018-10-12 20:46:22,138 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:46:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:46:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:46:23,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:46:23,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-12 20:46:23,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-12 20:46:23,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-12 20:46:23,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2018-10-12 20:46:23,607 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 52 states. [2018-10-12 20:46:29,261 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:46:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:46:36,540 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-10-12 20:46:36,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-12 20:46:36,541 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 255 [2018-10-12 20:46:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:46:36,543 INFO L225 Difference]: With dead ends: 278 [2018-10-12 20:46:36,543 INFO L226 Difference]: Without dead ends: 278 [2018-10-12 20:46:36,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=4478, Invalid=14154, Unknown=0, NotChecked=0, Total=18632 [2018-10-12 20:46:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-12 20:46:36,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2018-10-12 20:46:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-12 20:46:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-12 20:46:36,549 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 255 [2018-10-12 20:46:36,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:46:36,550 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-12 20:46:36,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-12 20:46:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-12 20:46:36,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-12 20:46:36,551 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:46:36,552 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:46:36,552 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:46:36,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:46:36,552 INFO L82 PathProgramCache]: Analyzing trace with hash -668913714, now seen corresponding path program 18 times [2018-10-12 20:46:36,553 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:46:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:46:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:46:38,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:46:38,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-12 20:46:38,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-12 20:46:38,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-12 20:46:38,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2018-10-12 20:46:38,213 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 54 states. [2018-10-12 20:46:41,889 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:42,031 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:46:42,446 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:42,595 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:46:43,072 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:43,227 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:46:43,665 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:43,829 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:46:44,283 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:44,485 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:46:44,985 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:45,158 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:46:45,634 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:45,810 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:46:46,296 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:46,497 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:46:46,976 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:47,167 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:46:47,673 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:47,876 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:46:48,407 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:48,614 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:46:49,142 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:49,355 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:46:49,988 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:50,204 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 20:46:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:46:51,866 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2018-10-12 20:46:51,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-12 20:46:51,875 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2018-10-12 20:46:51,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:46:51,877 INFO L225 Difference]: With dead ends: 290 [2018-10-12 20:46:51,877 INFO L226 Difference]: Without dead ends: 290 [2018-10-12 20:46:51,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=4586, Invalid=15154, Unknown=0, NotChecked=0, Total=19740 [2018-10-12 20:46:51,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-12 20:46:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2018-10-12 20:46:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-12 20:46:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-12 20:46:51,884 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 267 [2018-10-12 20:46:51,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:46:51,885 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-12 20:46:51,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-12 20:46:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-12 20:46:51,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-12 20:46:51,887 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:46:51,887 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:46:51,887 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:46:51,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:46:51,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1523616468, now seen corresponding path program 19 times [2018-10-12 20:46:51,888 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:46:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:46:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:46:53,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:46:53,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-12 20:46:53,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-12 20:46:53,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-12 20:46:53,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2018-10-12 20:46:53,721 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 56 states. [2018-10-12 20:46:58,011 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:47:00,176 WARN L178 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-12 20:47:04,971 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:47:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:47:08,223 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-12 20:47:08,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-12 20:47:08,224 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 279 [2018-10-12 20:47:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:47:08,225 INFO L225 Difference]: With dead ends: 302 [2018-10-12 20:47:08,226 INFO L226 Difference]: Without dead ends: 302 [2018-10-12 20:47:08,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=5295, Invalid=16757, Unknown=0, NotChecked=0, Total=22052 [2018-10-12 20:47:08,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-12 20:47:08,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 292. [2018-10-12 20:47:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-12 20:47:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-12 20:47:08,232 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 279 [2018-10-12 20:47:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:47:08,233 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-12 20:47:08,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-12 20:47:08,233 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-12 20:47:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-12 20:47:08,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:47:08,235 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:47:08,235 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:47:08,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:47:08,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2036436186, now seen corresponding path program 20 times [2018-10-12 20:47:08,236 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:47:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:47:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:47:10,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:47:10,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-12 20:47:10,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-12 20:47:10,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-12 20:47:10,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2018-10-12 20:47:10,064 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 58 states. [2018-10-12 20:47:14,023 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-12 20:47:14,168 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-12 20:47:14,784 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-12 20:47:14,964 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:15,152 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-12 20:47:15,414 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-12 20:47:15,590 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:15,769 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:16,262 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:16,445 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:16,939 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:17,129 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:17,629 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:17,816 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:18,337 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:18,538 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:19,087 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:19,301 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:19,837 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:20,049 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:20,242 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-12 20:47:20,455 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-12 20:47:20,675 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:20,903 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:21,260 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-12 20:47:21,484 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:21,710 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:22,304 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:22,546 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:23,180 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:23,410 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-12 20:47:24,150 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-12 20:47:24,376 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-12 20:47:24,783 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-12 20:47:25,001 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-12 20:47:25,437 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-12 20:47:26,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:47:26,647 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2018-10-12 20:47:26,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-12 20:47:26,647 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 291 [2018-10-12 20:47:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:47:26,649 INFO L225 Difference]: With dead ends: 314 [2018-10-12 20:47:26,650 INFO L226 Difference]: Without dead ends: 314 [2018-10-12 20:47:26,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=4885, Invalid=17765, Unknown=0, NotChecked=0, Total=22650 [2018-10-12 20:47:26,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-12 20:47:26,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2018-10-12 20:47:26,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-12 20:47:26,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-12 20:47:26,656 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 291 [2018-10-12 20:47:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:47:26,657 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-12 20:47:26,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-12 20:47:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-12 20:47:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-12 20:47:26,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:47:26,659 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:47:26,659 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:47:26,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:47:26,659 INFO L82 PathProgramCache]: Analyzing trace with hash -476989984, now seen corresponding path program 21 times [2018-10-12 20:47:26,660 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:47:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:47:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:47:28,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:47:28,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-12 20:47:28,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-12 20:47:28,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-12 20:47:28,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2018-10-12 20:47:28,807 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 60 states. [2018-10-12 20:47:33,124 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:47:35,553 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:47:40,961 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:47:43,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:47:43,828 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2018-10-12 20:47:43,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-12 20:47:43,834 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 303 [2018-10-12 20:47:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:47:43,836 INFO L225 Difference]: With dead ends: 326 [2018-10-12 20:47:43,836 INFO L226 Difference]: Without dead ends: 326 [2018-10-12 20:47:43,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=6180, Invalid=19580, Unknown=0, NotChecked=0, Total=25760 [2018-10-12 20:47:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-10-12 20:47:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2018-10-12 20:47:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-12 20:47:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-12 20:47:43,842 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 303 [2018-10-12 20:47:43,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:47:43,843 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-12 20:47:43,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-12 20:47:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-12 20:47:43,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-12 20:47:43,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:47:43,845 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:47:43,845 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:47:43,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:47:43,846 INFO L82 PathProgramCache]: Analyzing trace with hash 417236454, now seen corresponding path program 22 times [2018-10-12 20:47:43,846 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:47:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:47:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:47:46,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:47:46,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-12 20:47:46,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-12 20:47:46,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-12 20:47:46,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2018-10-12 20:47:46,561 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 62 states. [2018-10-12 20:47:49,911 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:50,055 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:47:50,905 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 20:47:51,101 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:51,308 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:47:51,735 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:52,353 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:52,521 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:47:52,992 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:53,168 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:47:53,644 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:53,821 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:47:54,313 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:54,505 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:47:55,016 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:55,215 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:47:55,712 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:55,946 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:47:56,160 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-12 20:47:56,382 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 20:47:56,569 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:57,284 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:58,007 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:58,761 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:59,529 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:59,750 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:48:00,304 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:48:01,110 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:48:01,383 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 20:48:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:48:03,220 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-12 20:48:03,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-12 20:48:03,221 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 315 [2018-10-12 20:48:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:48:03,223 INFO L225 Difference]: With dead ends: 338 [2018-10-12 20:48:03,224 INFO L226 Difference]: Without dead ends: 338 [2018-10-12 20:48:03,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=6304, Invalid=20756, Unknown=0, NotChecked=0, Total=27060 [2018-10-12 20:48:03,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-12 20:48:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-10-12 20:48:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-12 20:48:03,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-12 20:48:03,230 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 315 [2018-10-12 20:48:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:48:03,231 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-12 20:48:03,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-12 20:48:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-12 20:48:03,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-12 20:48:03,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:48:03,233 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:48:03,233 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:48:03,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:48:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash -930775828, now seen corresponding path program 23 times [2018-10-12 20:48:03,234 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:48:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:48:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:48:05,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:48:05,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-12 20:48:05,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-12 20:48:05,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-12 20:48:05,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2018-10-12 20:48:05,538 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 64 states. [2018-10-12 20:48:11,348 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:48:16,459 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:48:16,673 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:48:23,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:48:23,385 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2018-10-12 20:48:23,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-12 20:48:23,385 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 327 [2018-10-12 20:48:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:48:23,387 INFO L225 Difference]: With dead ends: 350 [2018-10-12 20:48:23,387 INFO L226 Difference]: Without dead ends: 350 [2018-10-12 20:48:23,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7091 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=7133, Invalid=22623, Unknown=0, NotChecked=0, Total=29756 [2018-10-12 20:48:23,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-12 20:48:23,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2018-10-12 20:48:23,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-12 20:48:23,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-12 20:48:23,393 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 327 [2018-10-12 20:48:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:48:23,394 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-12 20:48:23,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-12 20:48:23,394 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-12 20:48:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-12 20:48:23,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:48:23,396 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:48:23,396 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:48:23,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:48:23,397 INFO L82 PathProgramCache]: Analyzing trace with hash 830741234, now seen corresponding path program 24 times [2018-10-12 20:48:23,397 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:48:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:48:23,973 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-12 20:48:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:48:26,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:48:26,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-12 20:48:26,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-12 20:48:26,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-12 20:48:26,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2018-10-12 20:48:26,703 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 66 states. [2018-10-12 20:48:30,482 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-12 20:48:30,647 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-12 20:48:31,219 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-10-12 20:48:31,401 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-10-12 20:48:32,043 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-10-12 20:48:32,262 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2018-10-12 20:48:32,896 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2018-10-12 20:48:33,106 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2018-10-12 20:48:33,793 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2018-10-12 20:48:34,019 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2018-10-12 20:48:34,378 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2018-10-12 20:48:34,700 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2018-10-12 20:48:34,950 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 20:48:35,127 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 20:48:35,346 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 20:48:35,588 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 20:48:35,829 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 20:48:36,001 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 20:48:36,185 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 20:48:36,446 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 20:48:36,697 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 20:48:36,876 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 20:48:37,157 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 20:48:37,412 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 20:48:37,670 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 20:48:37,852 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 20:48:38,046 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 20:48:38,301 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 20:48:38,570 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 20:48:38,758 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 20:48:38,960 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 20:48:39,223 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 20:48:39,493 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 20:48:39,686 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 20:48:39,886 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 20:48:40,154 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 20:48:40,437 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 20:48:40,630 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 20:48:40,830 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 20:48:41,110 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 20:48:41,402 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2018-10-12 20:48:41,598 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-10-12 20:48:41,798 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-10-12 20:48:42,093 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2018-10-12 20:48:42,440 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2018-10-12 20:48:42,925 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2018-10-12 20:48:43,196 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2018-10-12 20:48:43,666 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-10-12 20:48:43,934 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2018-10-12 20:48:44,382 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-10-12 20:48:44,632 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2018-10-12 20:48:45,070 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-10-12 20:48:45,300 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-12 20:48:45,725 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2018-10-12 20:48:47,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:48:47,705 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2018-10-12 20:48:47,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-12 20:48:47,705 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 339 [2018-10-12 20:48:47,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:48:47,707 INFO L225 Difference]: With dead ends: 362 [2018-10-12 20:48:47,707 INFO L226 Difference]: Without dead ends: 362 [2018-10-12 20:48:47,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=5471, Invalid=23599, Unknown=0, NotChecked=0, Total=29070 [2018-10-12 20:48:47,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-12 20:48:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2018-10-12 20:48:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-12 20:48:47,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-10-12 20:48:47,714 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 339 [2018-10-12 20:48:47,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:48:47,715 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-10-12 20:48:47,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-12 20:48:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-10-12 20:48:47,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-12 20:48:47,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:48:47,717 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:48:47,717 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:48:47,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:48:47,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2103975944, now seen corresponding path program 25 times [2018-10-12 20:48:47,718 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:48:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:48:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:48:51,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:48:51,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-12 20:48:51,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-12 20:48:51,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-12 20:48:51,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2018-10-12 20:48:51,159 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 68 states. [2018-10-12 20:48:57,569 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:48:57,747 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:49:01,535 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:49:07,849 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:49:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:49:10,846 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2018-10-12 20:49:10,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-12 20:49:10,846 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 351 [2018-10-12 20:49:10,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:49:10,848 INFO L225 Difference]: With dead ends: 374 [2018-10-12 20:49:10,848 INFO L226 Difference]: Without dead ends: 374 [2018-10-12 20:49:10,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8218 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=8154, Invalid=25886, Unknown=0, NotChecked=0, Total=34040 [2018-10-12 20:49:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-10-12 20:49:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2018-10-12 20:49:10,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-12 20:49:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-10-12 20:49:10,855 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 351 [2018-10-12 20:49:10,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:49:10,855 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-10-12 20:49:10,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-12 20:49:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-10-12 20:49:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-12 20:49:10,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:49:10,858 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:49:10,858 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:49:10,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:49:10,858 INFO L82 PathProgramCache]: Analyzing trace with hash 977161214, now seen corresponding path program 26 times [2018-10-12 20:49:10,859 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:49:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:49:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:49:13,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:49:13,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-12 20:49:13,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-12 20:49:13,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-12 20:49:13,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2018-10-12 20:49:13,782 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 70 states. [2018-10-12 20:49:16,171 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:16,594 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:16,737 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:17,163 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:17,313 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:17,751 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:17,910 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:18,482 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:18,643 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:19,109 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:19,277 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:19,752 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:19,927 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:20,412 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:20,594 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:21,094 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:21,800 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:21,991 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:22,522 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:22,721 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:23,303 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:24,799 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:25,555 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:26,320 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:27,921 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:28,177 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:29,688 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:49:33,755 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-12 20:49:33,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-12 20:49:33,755 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 363 [2018-10-12 20:49:33,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:49:33,757 INFO L225 Difference]: With dead ends: 386 [2018-10-12 20:49:33,757 INFO L226 Difference]: Without dead ends: 386 [2018-10-12 20:49:33,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8540 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=8294, Invalid=27238, Unknown=0, NotChecked=0, Total=35532 [2018-10-12 20:49:33,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-12 20:49:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2018-10-12 20:49:33,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-12 20:49:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-10-12 20:49:33,763 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 363 [2018-10-12 20:49:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:49:33,764 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-10-12 20:49:33,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-12 20:49:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-10-12 20:49:33,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-12 20:49:33,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:49:33,766 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:49:33,766 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:49:33,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:49:33,767 INFO L82 PathProgramCache]: Analyzing trace with hash -2034966780, now seen corresponding path program 27 times [2018-10-12 20:49:33,767 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:49:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:49:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:49:36,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:49:36,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-12 20:49:36,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-12 20:49:36,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-12 20:49:36,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-10-12 20:49:36,397 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 72 states. [2018-10-12 20:49:45,539 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:49:48,999 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:49:50,702 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:49:53,948 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:49:55,730 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:49:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:49:57,911 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-10-12 20:49:57,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-12 20:49:57,911 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 375 [2018-10-12 20:49:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:49:57,913 INFO L225 Difference]: With dead ends: 398 [2018-10-12 20:49:57,913 INFO L226 Difference]: Without dead ends: 398 [2018-10-12 20:49:57,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=9243, Invalid=29369, Unknown=0, NotChecked=0, Total=38612 [2018-10-12 20:49:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-12 20:49:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 388. [2018-10-12 20:49:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-12 20:49:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-12 20:49:57,919 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 375 [2018-10-12 20:49:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:49:57,919 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-12 20:49:57,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-12 20:49:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-12 20:49:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-12 20:49:57,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:49:57,922 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:49:57,922 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:49:57,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:49:57,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1510401782, now seen corresponding path program 28 times [2018-10-12 20:49:57,923 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:49:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:50:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:50:00,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:50:00,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-12 20:50:00,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-12 20:50:00,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-12 20:50:00,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=4619, Unknown=0, NotChecked=0, Total=5402 [2018-10-12 20:50:00,912 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 74 states. [2018-10-12 20:50:04,121 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-12 20:50:04,304 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-12 20:50:04,852 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-12 20:50:05,021 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:05,527 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:05,692 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:06,167 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:06,340 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:06,823 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:07,004 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:07,173 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-12 20:50:07,522 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:07,707 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:08,232 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:08,431 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:08,978 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:09,211 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:09,846 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:10,067 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:10,647 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:10,872 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:11,458 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:11,698 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:12,284 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:12,510 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:13,094 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:13,323 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:13,926 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:14,170 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:14,399 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-12 20:50:14,892 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:15,141 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:15,800 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:16,070 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:16,730 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:17,009 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:17,692 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:17,975 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:18,669 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:18,957 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:19,416 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-12 20:50:19,741 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:20,023 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:20,721 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:21,006 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-12 20:50:21,698 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-12 20:50:21,992 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-12 20:50:22,517 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-12 20:50:22,792 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-12 20:50:23,300 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-12 20:50:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:50:24,870 INFO L93 Difference]: Finished difference Result 410 states and 410 transitions. [2018-10-12 20:50:24,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-12 20:50:24,874 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 387 [2018-10-12 20:50:24,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:50:24,876 INFO L225 Difference]: With dead ends: 410 [2018-10-12 20:50:24,876 INFO L226 Difference]: Without dead ends: 410 [2018-10-12 20:50:24,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9425 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=8673, Invalid=30729, Unknown=0, NotChecked=0, Total=39402 [2018-10-12 20:50:24,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-10-12 20:50:24,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 400. [2018-10-12 20:50:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-12 20:50:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-10-12 20:50:24,882 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 387 [2018-10-12 20:50:24,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:50:24,883 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-10-12 20:50:24,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-12 20:50:24,883 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-10-12 20:50:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-12 20:50:24,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:50:24,885 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:50:24,886 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:50:24,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:50:24,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1170766352, now seen corresponding path program 29 times [2018-10-12 20:50:24,887 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:50:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:50:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:50:27,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:50:27,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-12 20:50:27,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-12 20:50:27,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-12 20:50:27,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4697, Unknown=0, NotChecked=0, Total=5700 [2018-10-12 20:50:27,806 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 76 states. [2018-10-12 20:50:31,201 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:50:33,804 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:50:39,908 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:50:42,030 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:50:51,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:50:51,454 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-12 20:50:51,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-12 20:50:51,454 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 399 [2018-10-12 20:50:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:50:51,456 INFO L225 Difference]: With dead ends: 422 [2018-10-12 20:50:51,456 INFO L226 Difference]: Without dead ends: 422 [2018-10-12 20:50:51,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10724 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=10400, Invalid=33072, Unknown=0, NotChecked=0, Total=43472 [2018-10-12 20:50:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-12 20:50:51,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2018-10-12 20:50:51,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-12 20:50:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-10-12 20:50:51,463 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 399 [2018-10-12 20:50:51,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:50:51,463 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-10-12 20:50:51,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-12 20:50:51,464 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-10-12 20:50:51,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-12 20:50:51,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:50:51,466 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:50:51,467 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:50:51,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:50:51,467 INFO L82 PathProgramCache]: Analyzing trace with hash -476020202, now seen corresponding path program 30 times [2018-10-12 20:50:51,468 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:50:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:50:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:50:55,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:50:55,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-12 20:50:55,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-12 20:50:55,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-12 20:50:55,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2018-10-12 20:50:55,292 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 78 states. [2018-10-12 20:50:58,193 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 20:50:58,339 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:50:58,806 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:50:58,950 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:50:59,384 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:50:59,533 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:50:59,989 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:00,141 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:51:00,492 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 20:51:00,672 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:01,308 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:01,474 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:51:01,960 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:02,133 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:51:02,637 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:02,818 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:51:03,326 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:03,510 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:51:04,031 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:04,223 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:51:04,763 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:05,543 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:05,784 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:51:07,843 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:08,626 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:09,423 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:10,245 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:11,198 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:12,923 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:13,799 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:14,702 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:15,643 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:16,008 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:51:16,675 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:17,629 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:17,914 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 20:51:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:51:20,101 INFO L93 Difference]: Finished difference Result 434 states and 434 transitions. [2018-10-12 20:51:20,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-12 20:51:20,102 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 411 [2018-10-12 20:51:20,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:51:20,103 INFO L225 Difference]: With dead ends: 434 [2018-10-12 20:51:20,103 INFO L226 Difference]: Without dead ends: 434 [2018-10-12 20:51:20,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11090 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=10556, Invalid=34600, Unknown=0, NotChecked=0, Total=45156 [2018-10-12 20:51:20,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-12 20:51:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2018-10-12 20:51:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-12 20:51:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-12 20:51:20,110 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 411 [2018-10-12 20:51:20,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:51:20,111 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-12 20:51:20,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-12 20:51:20,111 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-12 20:51:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-12 20:51:20,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:51:20,114 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:51:20,114 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:51:20,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:51:20,114 INFO L82 PathProgramCache]: Analyzing trace with hash 750694684, now seen corresponding path program 31 times [2018-10-12 20:51:20,115 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:51:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:51:23,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:51:23,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:51:23,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-12 20:51:23,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-12 20:51:23,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-12 20:51:23,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=5189, Unknown=0, NotChecked=0, Total=6320 [2018-10-12 20:51:23,810 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 80 states. [2018-10-12 20:51:27,260 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-12 20:51:31,079 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-12 20:51:31,348 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-12 20:51:36,240 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:51:36,544 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:51:46,475 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:51:50,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:51:50,274 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2018-10-12 20:51:50,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-12 20:51:50,274 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 423 [2018-10-12 20:51:50,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:51:50,276 INFO L225 Difference]: With dead ends: 446 [2018-10-12 20:51:50,276 INFO L226 Difference]: Without dead ends: 446 [2018-10-12 20:51:50,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12103 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=11625, Invalid=36995, Unknown=0, NotChecked=0, Total=48620 [2018-10-12 20:51:50,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-10-12 20:51:50,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2018-10-12 20:51:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-12 20:51:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-10-12 20:51:50,283 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 423 [2018-10-12 20:51:50,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:51:50,283 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-10-12 20:51:50,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-12 20:51:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-10-12 20:51:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-12 20:51:50,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:51:50,286 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:51:50,287 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:51:50,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:51:50,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1579190050, now seen corresponding path program 32 times [2018-10-12 20:51:50,288 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:51:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:51:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:51:54,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:51:54,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-12 20:51:54,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-12 20:51:54,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-12 20:51:54,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6090, Unknown=0, NotChecked=0, Total=6320 [2018-10-12 20:51:55,000 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 80 states. [2018-10-12 20:52:25,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:52:25,918 INFO L93 Difference]: Finished difference Result 458 states and 458 transitions. [2018-10-12 20:52:25,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-10-12 20:52:25,918 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 435 [2018-10-12 20:52:25,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:52:25,920 INFO L225 Difference]: With dead ends: 458 [2018-10-12 20:52:25,920 INFO L226 Difference]: Without dead ends: 458 [2018-10-12 20:52:25,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6811 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=2751, Invalid=35079, Unknown=0, NotChecked=0, Total=37830 [2018-10-12 20:52:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-10-12 20:52:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 448. [2018-10-12 20:52:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-10-12 20:52:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 448 transitions. [2018-10-12 20:52:25,926 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 448 transitions. Word has length 435 [2018-10-12 20:52:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:52:25,926 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 448 transitions. [2018-10-12 20:52:25,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-12 20:52:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 448 transitions. [2018-10-12 20:52:25,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-10-12 20:52:25,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:52:25,929 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:52:25,930 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:52:25,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:52:25,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1534884824, now seen corresponding path program 33 times [2018-10-12 20:52:25,931 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:52:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:52:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:52:29,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:52:29,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-10-12 20:52:29,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-12 20:52:29,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-12 20:52:29,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1267, Invalid=5705, Unknown=0, NotChecked=0, Total=6972 [2018-10-12 20:52:29,640 INFO L87 Difference]: Start difference. First operand 448 states and 448 transitions. Second operand 84 states. [2018-10-12 20:52:33,970 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:52:37,557 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:52:39,535 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:52:47,376 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:52:48,044 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:52:52,501 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:52:58,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:52:58,570 INFO L93 Difference]: Finished difference Result 470 states and 470 transitions. [2018-10-12 20:52:58,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-10-12 20:52:58,570 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 447 [2018-10-12 20:52:58,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:52:58,572 INFO L225 Difference]: With dead ends: 470 [2018-10-12 20:52:58,572 INFO L226 Difference]: Without dead ends: 470 [2018-10-12 20:52:58,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13566 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=12918, Invalid=41138, Unknown=0, NotChecked=0, Total=54056 [2018-10-12 20:52:58,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-10-12 20:52:58,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 460. [2018-10-12 20:52:58,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-10-12 20:52:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 460 transitions. [2018-10-12 20:52:58,578 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 460 transitions. Word has length 447 [2018-10-12 20:52:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:52:58,579 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 460 transitions. [2018-10-12 20:52:58,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-12 20:52:58,579 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 460 transitions. [2018-10-12 20:52:58,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-10-12 20:52:58,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:52:58,582 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-12 20:52:58,582 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:52:58,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:52:58,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2087004206, now seen corresponding path program 34 times [2018-10-12 20:52:58,583 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:52:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:53:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:53:02,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:53:02,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-10-12 20:53:02,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-12 20:53:02,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-12 20:53:02,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1271, Invalid=6039, Unknown=0, NotChecked=0, Total=7310 [2018-10-12 20:53:02,509 INFO L87 Difference]: Start difference. First operand 460 states and 460 transitions. Second operand 86 states. [2018-10-12 20:53:05,516 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 20:53:05,672 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57