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-deref.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-502d2f4 [2018-10-12 20:44:23,316 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-12 20:44:23,319 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-12 20:44:23,331 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-12 20:44:23,331 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-12 20:44:23,332 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-12 20:44:23,334 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-12 20:44:23,335 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-12 20:44:23,337 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-12 20:44:23,338 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-12 20:44:23,339 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-12 20:44:23,365 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 20:44:23,379 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-12 20:44:23,379 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-12 20:44:23,381 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-12 20:44:23,381 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-12 20:44:23,382 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-12 20:44:23,382 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-12 20:44:23,383 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-12 20:44:23,386 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-12 20:44:23,386 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-12 20:44:23,386 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-12 20:44:23,386 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-12 20:44:23,387 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-12 20:44:23,387 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-12 20:44:23,389 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-12 20:44:23,390 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-12 20:44:23,446 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-12 20:44:23,466 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-12 20:44:23,470 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-12 20:44:23,472 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-12 20:44:23,473 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-12 20:44:23,474 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-deref.i_5.bpl [2018-10-12 20:44:23,474 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_false-valid-deref.i_5.bpl' [2018-10-12 20:44:23,560 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-12 20:44:23,562 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-12 20:44:23,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-12 20:44:23,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-12 20:44:23,564 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-12 20:44:23,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/1) ... [2018-10-12 20:44:23,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/1) ... [2018-10-12 20:44:23,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/1) ... [2018-10-12 20:44:23,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/1) ... [2018-10-12 20:44:23,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/1) ... [2018-10-12 20:44:23,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/1) ... [2018-10-12 20:44:23,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/1) ... [2018-10-12 20:44:23,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-12 20:44:23,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-12 20:44:23,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-12 20:44:23,632 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-12 20:44:23,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "960521-1_false-valid-deref.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 20:44:23,708 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-12 20:44:23,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-12 20:44:23,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-12 20:44:24,216 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-12 20:44:24,217 INFO L202 PluginConnector]: Adding new model 960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:44:24 BoogieIcfgContainer [2018-10-12 20:44:24,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-12 20:44:24,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-12 20:44:24,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-12 20:44:24,222 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-12 20:44:24,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:44:23" (1/2) ... [2018-10-12 20:44:24,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5395b6d1 and model type 960521-1_false-valid-deref.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 20:44:24,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_false-valid-deref.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:44:24" (2/2) ... [2018-10-12 20:44:24,228 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1_false-valid-deref.i_5.bpl [2018-10-12 20:44:24,238 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-12 20:44:24,247 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-12 20:44:24,265 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-12 20:44:24,296 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-12 20:44:24,297 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-12 20:44:24,297 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-12 20:44:24,297 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-12 20:44:24,297 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-12 20:44:24,297 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-12 20:44:24,298 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-12 20:44:24,298 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-12 20:44:24,298 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-12 20:44:24,317 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2018-10-12 20:44:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-12 20:44:24,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:24,331 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 20:44:24,332 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:24,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:24,340 INFO L82 PathProgramCache]: Analyzing trace with hash -412527006, now seen corresponding path program 1 times [2018-10-12 20:44:24,392 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:25,473 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 20:44:25,476 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-12 20:44:25,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-10-12 20:44:25,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-12 20:44:25,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-12 20:44:25,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-12 20:44:25,503 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 14 states. [2018-10-12 20:44:26,138 WARN L178 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-12 20:44:27,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:27,017 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-12 20:44:27,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-12 20:44:27,019 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2018-10-12 20:44:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:27,031 INFO L225 Difference]: With dead ends: 74 [2018-10-12 20:44:27,032 INFO L226 Difference]: Without dead ends: 74 [2018-10-12 20:44:27,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2018-10-12 20:44:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-12 20:44:27,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2018-10-12 20:44:27,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-12 20:44:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-12 20:44:27,082 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 51 [2018-10-12 20:44:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:27,083 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-12 20:44:27,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-12 20:44:27,083 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-12 20:44:27,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-12 20:44:27,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:27,086 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 20:44:27,086 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:27,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:27,087 INFO L82 PathProgramCache]: Analyzing trace with hash 349139816, now seen corresponding path program 1 times [2018-10-12 20:44:27,088 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:27,686 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 20:44:27,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:27,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-12 20:44:27,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-12 20:44:27,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-12 20:44:27,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-10-12 20:44:27,690 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2018-10-12 20:44:28,312 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-10-12 20:44:29,446 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-12 20:44:29,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:29,612 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-12 20:44:29,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-12 20:44:29,617 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-12 20:44:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:29,619 INFO L225 Difference]: With dead ends: 86 [2018-10-12 20:44:29,619 INFO L226 Difference]: Without dead ends: 86 [2018-10-12 20:44:29,621 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 20:44:29,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-12 20:44:29,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-10-12 20:44:29,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-12 20:44:29,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-12 20:44:29,630 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 63 [2018-10-12 20:44:29,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:29,631 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-12 20:44:29,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-12 20:44:29,631 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-12 20:44:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-12 20:44:29,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:29,633 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 20:44:29,633 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:29,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:29,634 INFO L82 PathProgramCache]: Analyzing trace with hash -939247762, now seen corresponding path program 2 times [2018-10-12 20:44:29,635 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:30,139 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 20:44:30,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:30,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-12 20:44:30,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-12 20:44:30,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-12 20:44:30,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-12 20:44:30,141 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2018-10-12 20:44:31,053 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-10-12 20:44:31,664 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-12 20:44:32,142 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2018-10-12 20:44:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:32,446 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-12 20:44:32,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-12 20:44:32,448 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-12 20:44:32,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:32,450 INFO L225 Difference]: With dead ends: 98 [2018-10-12 20:44:32,450 INFO L226 Difference]: Without dead ends: 98 [2018-10-12 20:44:32,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2018-10-12 20:44:32,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-12 20:44:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2018-10-12 20:44:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-12 20:44:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-12 20:44:32,460 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 75 [2018-10-12 20:44:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:32,460 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-12 20:44:32,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-12 20:44:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-12 20:44:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-12 20:44:32,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:32,462 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 20:44:32,463 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:32,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:32,463 INFO L82 PathProgramCache]: Analyzing trace with hash 893723252, now seen corresponding path program 3 times [2018-10-12 20:44:32,464 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:33,026 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 20:44:33,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:33,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-12 20:44:33,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-12 20:44:33,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-12 20:44:33,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-10-12 20:44:33,028 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 22 states. [2018-10-12 20:44:34,909 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-12 20:44:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:35,747 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-12 20:44:35,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-12 20:44:35,748 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2018-10-12 20:44:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:35,754 INFO L225 Difference]: With dead ends: 110 [2018-10-12 20:44:35,755 INFO L226 Difference]: Without dead ends: 110 [2018-10-12 20:44:35,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2018-10-12 20:44:35,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-12 20:44:35,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-10-12 20:44:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-12 20:44:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-12 20:44:35,767 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 87 [2018-10-12 20:44:35,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:35,768 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-12 20:44:35,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-12 20:44:35,768 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-12 20:44:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-12 20:44:35,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:35,770 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 20:44:35,771 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:35,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1601194886, now seen corresponding path program 4 times [2018-10-12 20:44:35,772 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:36,487 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 20:44:36,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:36,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-12 20:44:36,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-12 20:44:36,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-12 20:44:36,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2018-10-12 20:44:36,489 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 24 states. [2018-10-12 20:44:39,314 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-10-12 20:44:39,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:39,406 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-12 20:44:39,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-12 20:44:39,407 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2018-10-12 20:44:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:39,409 INFO L225 Difference]: With dead ends: 122 [2018-10-12 20:44:39,410 INFO L226 Difference]: Without dead ends: 122 [2018-10-12 20:44:39,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2018-10-12 20:44:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-12 20:44:39,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2018-10-12 20:44:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-12 20:44:39,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-12 20:44:39,428 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 99 [2018-10-12 20:44:39,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:39,428 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-12 20:44:39,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-12 20:44:39,429 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-12 20:44:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-12 20:44:39,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:39,432 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 20:44:39,433 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:39,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:39,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1113494144, now seen corresponding path program 5 times [2018-10-12 20:44:39,434 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:40,239 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 20:44:40,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:40,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-12 20:44:40,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-12 20:44:40,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-12 20:44:40,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2018-10-12 20:44:40,241 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 28 states. [2018-10-12 20:44:42,201 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:44:43,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:43,828 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-12 20:44:43,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-12 20:44:43,829 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2018-10-12 20:44:43,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:43,831 INFO L225 Difference]: With dead ends: 134 [2018-10-12 20:44:43,831 INFO L226 Difference]: Without dead ends: 134 [2018-10-12 20:44:43,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1004, Invalid=3156, Unknown=0, NotChecked=0, Total=4160 [2018-10-12 20:44:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-12 20:44:43,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2018-10-12 20:44:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-12 20:44:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-12 20:44:43,839 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 111 [2018-10-12 20:44:43,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:43,840 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-12 20:44:43,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-12 20:44:43,840 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-12 20:44:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-12 20:44:43,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:43,844 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 20:44:43,844 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:43,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:43,844 INFO L82 PathProgramCache]: Analyzing trace with hash 267898246, now seen corresponding path program 6 times [2018-10-12 20:44:43,845 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:44,787 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-12 20:44:45,371 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 20:44:45,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:45,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-12 20:44:45,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-12 20:44:45,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-12 20:44:45,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2018-10-12 20:44:45,373 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 30 states. [2018-10-12 20:44:47,659 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 20:44:47,992 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:44:48,460 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:44:49,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:49,629 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-12 20:44:49,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-12 20:44:49,629 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2018-10-12 20:44:49,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:49,631 INFO L225 Difference]: With dead ends: 146 [2018-10-12 20:44:49,631 INFO L226 Difference]: Without dead ends: 146 [2018-10-12 20:44:49,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1064, Invalid=3628, Unknown=0, NotChecked=0, Total=4692 [2018-10-12 20:44:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-12 20:44:49,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-12 20:44:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-12 20:44:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-12 20:44:49,639 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 123 [2018-10-12 20:44:49,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:49,640 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-12 20:44:49,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-12 20:44:49,640 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-12 20:44:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-12 20:44:49,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:49,642 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 20:44:49,642 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:49,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:49,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1255167116, now seen corresponding path program 7 times [2018-10-12 20:44:49,644 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:50,759 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 20:44:50,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:50,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-12 20:44:50,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-12 20:44:50,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-12 20:44:50,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2018-10-12 20:44:50,761 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 32 states. [2018-10-12 20:44:51,462 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-12 20:44:54,566 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:44:55,759 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-10-12 20:44:56,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:44:56,392 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-12 20:44:56,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-12 20:44:56,393 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-12 20:44:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:44:56,395 INFO L225 Difference]: With dead ends: 158 [2018-10-12 20:44:56,395 INFO L226 Difference]: Without dead ends: 158 [2018-10-12 20:44:56,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2018-10-12 20:44:56,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-12 20:44:56,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2018-10-12 20:44:56,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-12 20:44:56,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-12 20:44:56,403 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 135 [2018-10-12 20:44:56,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:44:56,404 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-12 20:44:56,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-12 20:44:56,404 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-12 20:44:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-12 20:44:56,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:44:56,406 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 20:44:56,407 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:44:56,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:44:56,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1322745198, now seen corresponding path program 8 times [2018-10-12 20:44:56,408 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:44:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:44:57,593 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 20:44:57,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:44:57,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-12 20:44:57,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-12 20:44:57,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-12 20:44:57,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-10-12 20:44:57,595 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 32 states. [2018-10-12 20:45:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:45:02,278 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-12 20:45:02,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-12 20:45:02,278 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2018-10-12 20:45:02,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:45:02,280 INFO L225 Difference]: With dead ends: 170 [2018-10-12 20:45:02,280 INFO L226 Difference]: Without dead ends: 170 [2018-10-12 20:45:02,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=927, Invalid=4623, Unknown=0, NotChecked=0, Total=5550 [2018-10-12 20:45:02,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-12 20:45:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2018-10-12 20:45:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-12 20:45:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-12 20:45:02,287 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 147 [2018-10-12 20:45:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:45:02,288 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-12 20:45:02,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-12 20:45:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-12 20:45:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-12 20:45:02,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:45:02,290 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 20:45:02,291 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:45:02,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:45:02,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1975375768, now seen corresponding path program 9 times [2018-10-12 20:45:02,292 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:45:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:45:03,112 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 20:45:03,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:45:03,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-12 20:45:03,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-12 20:45:03,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-12 20:45:03,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-12 20:45:03,114 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 36 states. [2018-10-12 20:45:07,082 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:45:09,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:45:09,020 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-12 20:45:09,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-12 20:45:09,020 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2018-10-12 20:45:09,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:45:09,022 INFO L225 Difference]: With dead ends: 182 [2018-10-12 20:45:09,022 INFO L226 Difference]: Without dead ends: 182 [2018-10-12 20:45:09,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1890, Invalid=5942, Unknown=0, NotChecked=0, Total=7832 [2018-10-12 20:45:09,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-12 20:45:09,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2018-10-12 20:45:09,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-12 20:45:09,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-12 20:45:09,029 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 159 [2018-10-12 20:45:09,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:45:09,029 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-12 20:45:09,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-12 20:45:09,030 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-12 20:45:09,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-12 20:45:09,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:45:09,032 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 20:45:09,032 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:45:09,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:45:09,032 INFO L82 PathProgramCache]: Analyzing trace with hash 453890974, now seen corresponding path program 10 times [2018-10-12 20:45:09,033 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:45:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:45:09,947 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 20:45:09,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:45:09,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-12 20:45:09,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-12 20:45:09,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-12 20:45:09,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2018-10-12 20:45:09,949 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 38 states. [2018-10-12 20:45:12,301 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 20:45:12,492 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:45:13,422 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:13,986 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:14,234 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:45:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:45:16,591 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-12 20:45:16,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-12 20:45:16,591 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 171 [2018-10-12 20:45:16,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:45:16,593 INFO L225 Difference]: With dead ends: 194 [2018-10-12 20:45:16,593 INFO L226 Difference]: Without dead ends: 194 [2018-10-12 20:45:16,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1966, Invalid=6590, Unknown=0, NotChecked=0, Total=8556 [2018-10-12 20:45:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-12 20:45:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2018-10-12 20:45:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-12 20:45:16,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-12 20:45:16,599 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 171 [2018-10-12 20:45:16,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:45:16,599 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-12 20:45:16,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-12 20:45:16,600 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-12 20:45:16,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-12 20:45:16,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:45:16,601 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 20:45:16,601 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:45:16,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:45:16,601 INFO L82 PathProgramCache]: Analyzing trace with hash -749341020, now seen corresponding path program 11 times [2018-10-12 20:45:16,602 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:45:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:45:17,957 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 20:45:17,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:45:17,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-12 20:45:17,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-12 20:45:17,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-12 20:45:17,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2018-10-12 20:45:17,959 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 40 states. [2018-10-12 20:45:22,764 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:45:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:45:25,467 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-10-12 20:45:25,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-12 20:45:25,469 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 183 [2018-10-12 20:45:25,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:45:25,470 INFO L225 Difference]: With dead ends: 206 [2018-10-12 20:45:25,470 INFO L226 Difference]: Without dead ends: 206 [2018-10-12 20:45:25,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2435, Invalid=7665, Unknown=0, NotChecked=0, Total=10100 [2018-10-12 20:45:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-12 20:45:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2018-10-12 20:45:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-12 20:45:25,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-12 20:45:25,477 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 183 [2018-10-12 20:45:25,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:45:25,477 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-12 20:45:25,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-12 20:45:25,478 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-12 20:45:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-12 20:45:25,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:45:25,479 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 20:45:25,479 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:45:25,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:45:25,480 INFO L82 PathProgramCache]: Analyzing trace with hash -527187798, now seen corresponding path program 12 times [2018-10-12 20:45:25,481 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:45:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:45:26,545 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 20:45:26,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:45:26,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-12 20:45:26,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-12 20:45:26,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-12 20:45:26,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2018-10-12 20:45:26,547 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 42 states. [2018-10-12 20:45:30,421 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-12 20:45:30,589 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:45:31,055 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:45:31,217 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:45:31,659 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:45:31,833 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:45:32,285 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:45:32,458 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-12 20:45:32,775 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2018-10-12 20:45:32,983 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-12 20:45:33,155 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-12 20:45:33,468 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-12 20:45:33,943 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-12 20:45:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:45:34,800 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-12 20:45:34,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-12 20:45:34,801 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2018-10-12 20:45:34,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:45:34,802 INFO L225 Difference]: With dead ends: 218 [2018-10-12 20:45:34,802 INFO L226 Difference]: Without dead ends: 218 [2018-10-12 20:45:34,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2185, Invalid=8321, Unknown=0, NotChecked=0, Total=10506 [2018-10-12 20:45:34,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-12 20:45:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2018-10-12 20:45:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-12 20:45:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-12 20:45:34,807 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 195 [2018-10-12 20:45:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:45:34,807 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-12 20:45:34,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-12 20:45:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-12 20:45:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-12 20:45:34,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:45:34,809 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 20:45:34,809 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:45:34,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:45:34,810 INFO L82 PathProgramCache]: Analyzing trace with hash -192630352, now seen corresponding path program 13 times [2018-10-12 20:45:34,810 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:45:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:45:35,992 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 20:45:35,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:45:35,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-12 20:45:35,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-12 20:45:35,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-12 20:45:35,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2018-10-12 20:45:35,994 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 44 states. [2018-10-12 20:45:37,869 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2018-10-12 20:45:43,072 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:45:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:45:44,613 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-10-12 20:45:44,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-12 20:45:44,613 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 207 [2018-10-12 20:45:44,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:45:44,615 INFO L225 Difference]: With dead ends: 230 [2018-10-12 20:45:44,615 INFO L226 Difference]: Without dead ends: 230 [2018-10-12 20:45:44,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3048, Invalid=9608, Unknown=0, NotChecked=0, Total=12656 [2018-10-12 20:45:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-12 20:45:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-10-12 20:45:44,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-12 20:45:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-12 20:45:44,620 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 207 [2018-10-12 20:45:44,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:45:44,621 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-12 20:45:44,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-12 20:45:44,621 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-12 20:45:44,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-12 20:45:44,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:45:44,623 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 20:45:44,623 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:45:44,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:45:44,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1868150346, now seen corresponding path program 14 times [2018-10-12 20:45:44,624 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:45:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:45:45,984 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 20:45:45,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:45:45,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-12 20:45:45,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-12 20:45:45,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-12 20:45:45,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2018-10-12 20:45:45,986 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 46 states. [2018-10-12 20:45:47,997 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-12 20:45:50,789 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:51,943 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:53,250 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:53,489 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:45:53,663 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-12 20:45:53,975 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:45:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:45:55,558 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-10-12 20:45:55,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-12 20:45:55,559 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2018-10-12 20:45:55,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:45:55,561 INFO L225 Difference]: With dead ends: 242 [2018-10-12 20:45:55,561 INFO L226 Difference]: Without dead ends: 242 [2018-10-12 20:45:55,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3140, Invalid=10432, Unknown=0, NotChecked=0, Total=13572 [2018-10-12 20:45:55,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-12 20:45:55,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2018-10-12 20:45:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-12 20:45:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-12 20:45:55,567 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 219 [2018-10-12 20:45:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:45:55,567 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-12 20:45:55,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-12 20:45:55,568 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-12 20:45:55,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-12 20:45:55,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:45:55,569 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 20:45:55,569 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:45:55,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:45:55,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1714817212, now seen corresponding path program 15 times [2018-10-12 20:45:55,570 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:45:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:45:57,018 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 20:45:57,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:45:57,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-12 20:45:57,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-12 20:45:57,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-12 20:45:57,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2018-10-12 20:45:57,020 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 48 states. [2018-10-12 20:46:06,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:46:06,837 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-10-12 20:46:06,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-12 20:46:06,838 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2018-10-12 20:46:06,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:46:06,839 INFO L225 Difference]: With dead ends: 254 [2018-10-12 20:46:06,839 INFO L226 Difference]: Without dead ends: 254 [2018-10-12 20:46:06,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=3729, Invalid=11771, Unknown=0, NotChecked=0, Total=15500 [2018-10-12 20:46:06,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-12 20:46:06,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2018-10-12 20:46:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-12 20:46:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-12 20:46:06,845 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 231 [2018-10-12 20:46:06,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:46:06,846 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-12 20:46:06,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-12 20:46:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-12 20:46:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-12 20:46:06,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:46:06,847 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 20:46:06,848 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:46:06,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:46:06,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1238274366, now seen corresponding path program 16 times [2018-10-12 20:46:06,849 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:46:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:46:08,564 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 20:46:08,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:46:08,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-12 20:46:08,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-12 20:46:08,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-12 20:46:08,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2018-10-12 20:46:08,565 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 48 states. [2018-10-12 20:46:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:46:19,257 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2018-10-12 20:46:19,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-12 20:46:19,258 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 243 [2018-10-12 20:46:19,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:46:19,259 INFO L225 Difference]: With dead ends: 266 [2018-10-12 20:46:19,259 INFO L226 Difference]: Without dead ends: 266 [2018-10-12 20:46:19,260 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 20:46:19,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-12 20:46:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2018-10-12 20:46:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-12 20:46:19,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-12 20:46:19,265 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 243 [2018-10-12 20:46:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:46:19,265 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-12 20:46:19,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-12 20:46:19,266 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-12 20:46:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-12 20:46:19,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:46:19,267 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 20:46:19,267 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:46:19,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:46:19,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1319765048, now seen corresponding path program 17 times [2018-10-12 20:46:19,268 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:46:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:46:20,226 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-12 20:46:21,640 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 20:46:21,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:46:21,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-12 20:46:21,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-12 20:46:21,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-12 20:46:21,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2018-10-12 20:46:21,642 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 52 states. [2018-10-12 20:46:28,989 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:46:29,213 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:46:34,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:46:34,227 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-10-12 20:46:34,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-12 20:46:34,228 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 255 [2018-10-12 20:46:34,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:46:34,230 INFO L225 Difference]: With dead ends: 278 [2018-10-12 20:46:34,230 INFO L226 Difference]: Without dead ends: 278 [2018-10-12 20:46:34,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=4478, Invalid=14154, Unknown=0, NotChecked=0, Total=18632 [2018-10-12 20:46:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-12 20:46:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2018-10-12 20:46:34,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-12 20:46:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-12 20:46:34,236 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 255 [2018-10-12 20:46:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:46:34,237 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-12 20:46:34,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-12 20:46:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-12 20:46:34,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-12 20:46:34,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:46:34,239 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 20:46:34,239 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:46:34,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:46:34,240 INFO L82 PathProgramCache]: Analyzing trace with hash -668913714, now seen corresponding path program 18 times [2018-10-12 20:46:34,240 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:46:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:46:36,359 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 20:46:36,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:46:36,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-12 20:46:36,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-12 20:46:36,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-12 20:46:36,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2018-10-12 20:46:36,361 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 54 states. [2018-10-12 20:46:39,218 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 20:46:39,395 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:46:40,923 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:41,482 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:43,874 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:44,594 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:45,275 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:46:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:46:49,158 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2018-10-12 20:46:49,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-12 20:46:49,158 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2018-10-12 20:46:49,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:46:49,160 INFO L225 Difference]: With dead ends: 290 [2018-10-12 20:46:49,160 INFO L226 Difference]: Without dead ends: 290 [2018-10-12 20:46:49,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=4586, Invalid=15154, Unknown=0, NotChecked=0, Total=19740 [2018-10-12 20:46:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-12 20:46:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2018-10-12 20:46:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-12 20:46:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-12 20:46:49,166 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 267 [2018-10-12 20:46:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:46:49,166 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-12 20:46:49,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-12 20:46:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-12 20:46:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-12 20:46:49,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:46:49,168 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 20:46:49,168 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:46:49,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:46:49,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1523616468, now seen corresponding path program 19 times [2018-10-12 20:46:49,169 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:46:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:46:51,032 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 20:46:51,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:46:51,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-12 20:46:51,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-12 20:46:51,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-12 20:46:51,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2018-10-12 20:46:51,033 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 56 states. [2018-10-12 20:46:54,616 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:46:57,165 WARN L178 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-12 20:46:59,745 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:46:59,942 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:47:01,283 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:47:05,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:47:05,271 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-12 20:47:05,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-12 20:47:05,271 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 279 [2018-10-12 20:47:05,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:47:05,272 INFO L225 Difference]: With dead ends: 302 [2018-10-12 20:47:05,273 INFO L226 Difference]: Without dead ends: 302 [2018-10-12 20:47:05,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=5295, Invalid=16757, Unknown=0, NotChecked=0, Total=22052 [2018-10-12 20:47:05,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-12 20:47:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 292. [2018-10-12 20:47:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-12 20:47:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-12 20:47:05,278 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 279 [2018-10-12 20:47:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:47:05,278 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-12 20:47:05,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-12 20:47:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-12 20:47:05,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-12 20:47:05,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:47:05,280 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 20:47:05,281 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:47:05,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:47:05,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2036436186, now seen corresponding path program 20 times [2018-10-12 20:47:05,282 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:47:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:47:07,463 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 20:47:07,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:47:07,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-12 20:47:07,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-12 20:47:07,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-12 20:47:07,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2018-10-12 20:47:07,464 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 58 states. [2018-10-12 20:47:09,955 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-12 20:47:10,113 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2018-10-12 20:47:12,030 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-12 20:47:12,200 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:12,719 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:12,889 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:13,350 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:13,525 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:13,997 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:14,181 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:14,669 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:14,860 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:15,025 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-12 20:47:15,220 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-12 20:47:15,437 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:15,633 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:16,144 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:16,348 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:16,879 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:17,091 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:17,624 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:17,841 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:18,394 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:18,620 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:19,211 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:19,438 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:47:20,020 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:47:20,280 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-12 20:47:20,535 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2018-10-12 20:47:20,923 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-12 20:47:21,149 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-12 20:47:21,575 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-12 20:47:21,790 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-12 20:47:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:47:23,322 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2018-10-12 20:47:23,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-12 20:47:23,323 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 291 [2018-10-12 20:47:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:47:23,324 INFO L225 Difference]: With dead ends: 314 [2018-10-12 20:47:23,324 INFO L226 Difference]: Without dead ends: 314 [2018-10-12 20:47:23,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=4885, Invalid=17765, Unknown=0, NotChecked=0, Total=22650 [2018-10-12 20:47:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-12 20:47:23,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2018-10-12 20:47:23,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-12 20:47:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-12 20:47:23,331 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 291 [2018-10-12 20:47:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:47:23,331 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-12 20:47:23,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-12 20:47:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-12 20:47:23,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-12 20:47:23,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:47:23,333 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 20:47:23,333 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:47:23,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:47:23,334 INFO L82 PathProgramCache]: Analyzing trace with hash -476989984, now seen corresponding path program 21 times [2018-10-12 20:47:23,335 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:47:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:47:25,307 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 20:47:25,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:47:25,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-12 20:47:25,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-12 20:47:25,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-12 20:47:25,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2018-10-12 20:47:25,309 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 60 states. [2018-10-12 20:47:30,808 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:47:40,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:47:40,178 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2018-10-12 20:47:40,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-12 20:47:40,180 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 303 [2018-10-12 20:47:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:47:40,183 INFO L225 Difference]: With dead ends: 326 [2018-10-12 20:47:40,183 INFO L226 Difference]: Without dead ends: 326 [2018-10-12 20:47:40,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=6180, Invalid=19580, Unknown=0, NotChecked=0, Total=25760 [2018-10-12 20:47:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-10-12 20:47:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2018-10-12 20:47:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-12 20:47:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-12 20:47:40,188 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 303 [2018-10-12 20:47:40,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:47:40,188 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-12 20:47:40,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-12 20:47:40,188 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-12 20:47:40,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-12 20:47:40,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:47:40,190 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 20:47:40,190 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:47:40,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:47:40,191 INFO L82 PathProgramCache]: Analyzing trace with hash 417236454, now seen corresponding path program 22 times [2018-10-12 20:47:40,191 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:47:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:47:42,584 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 20:47:42,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:47:42,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-12 20:47:42,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-12 20:47:42,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-12 20:47:42,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2018-10-12 20:47:42,586 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 62 states. [2018-10-12 20:47:46,043 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:46,220 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:47:46,620 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:47,190 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:47,775 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:49,601 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:49,784 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:47:49,955 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-12 20:47:50,277 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:50,961 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:51,194 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:47:53,112 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:53,853 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:54,600 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:55,369 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:56,221 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:57,066 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:47:57,304 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-10-12 20:47:59,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:47:59,101 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-12 20:47:59,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-12 20:47:59,101 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 315 [2018-10-12 20:47:59,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:47:59,103 INFO L225 Difference]: With dead ends: 338 [2018-10-12 20:47:59,103 INFO L226 Difference]: Without dead ends: 338 [2018-10-12 20:47:59,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=6304, Invalid=20756, Unknown=0, NotChecked=0, Total=27060 [2018-10-12 20:47:59,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-12 20:47:59,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-10-12 20:47:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-12 20:47:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-12 20:47:59,109 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 315 [2018-10-12 20:47:59,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:47:59,109 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-12 20:47:59,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-12 20:47:59,110 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-12 20:47:59,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-12 20:47:59,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:47:59,111 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 20:47:59,112 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:47:59,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:47:59,112 INFO L82 PathProgramCache]: Analyzing trace with hash -930775828, now seen corresponding path program 23 times [2018-10-12 20:47:59,113 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:47:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:48:01,336 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 20:48:01,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:48:01,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-12 20:48:01,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-12 20:48:01,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-12 20:48:01,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2018-10-12 20:48:01,338 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 64 states. [2018-10-12 20:48:06,236 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:48:06,433 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:48:16,590 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:48:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:48:18,654 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2018-10-12 20:48:18,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-12 20:48:18,654 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 327 [2018-10-12 20:48:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:48:18,656 INFO L225 Difference]: With dead ends: 350 [2018-10-12 20:48:18,656 INFO L226 Difference]: Without dead ends: 350 [2018-10-12 20:48:18,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7091 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=7133, Invalid=22623, Unknown=0, NotChecked=0, Total=29756 [2018-10-12 20:48:18,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-12 20:48:18,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2018-10-12 20:48:18,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-12 20:48:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-12 20:48:18,662 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 327 [2018-10-12 20:48:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:48:18,662 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-12 20:48:18,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-12 20:48:18,662 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-12 20:48:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-12 20:48:18,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:48:18,664 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 20:48:18,665 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:48:18,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:48:18,665 INFO L82 PathProgramCache]: Analyzing trace with hash 830741234, now seen corresponding path program 24 times [2018-10-12 20:48:18,666 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:48:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:48:21,429 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 20:48:21,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:48:21,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-12 20:48:21,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-12 20:48:21,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-12 20:48:21,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2018-10-12 20:48:21,431 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 66 states. [2018-10-12 20:48:25,966 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-10-12 20:48:26,141 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-10-12 20:48:26,732 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-10-12 20:48:26,965 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2018-10-12 20:48:27,608 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2018-10-12 20:48:27,808 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2018-10-12 20:48:28,439 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2018-10-12 20:48:28,655 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2018-10-12 20:48:29,011 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2018-10-12 20:48:29,338 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2018-10-12 20:48:29,588 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 20:48:29,768 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 20:48:29,999 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 20:48:30,249 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 20:48:30,492 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 20:48:30,665 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 20:48:30,852 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 20:48:31,098 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 20:48:31,340 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 20:48:31,517 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 20:48:31,702 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 20:48:31,992 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 20:48:32,286 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 20:48:32,472 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 20:48:32,684 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 20:48:32,977 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 20:48:33,240 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 20:48:33,430 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 20:48:33,622 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 20:48:33,884 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 20:48:34,159 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 20:48:34,353 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 20:48:34,552 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 20:48:34,818 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 20:48:35,109 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-12 20:48:35,308 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-12 20:48:35,503 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-12 20:48:35,777 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-12 20:48:36,064 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2018-10-12 20:48:36,267 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-10-12 20:48:36,464 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-10-12 20:48:36,732 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2018-10-12 20:48:37,043 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2018-10-12 20:48:37,273 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2018-10-12 20:48:37,577 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2018-10-12 20:48:37,844 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2018-10-12 20:48:38,314 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-10-12 20:48:38,570 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2018-10-12 20:48:39,017 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-10-12 20:48:39,255 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2018-10-12 20:48:39,716 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-10-12 20:48:39,948 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-12 20:48:40,393 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2018-10-12 20:48:42,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:48:42,518 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2018-10-12 20:48:42,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-12 20:48:42,519 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 339 [2018-10-12 20:48:42,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:48:42,521 INFO L225 Difference]: With dead ends: 362 [2018-10-12 20:48:42,521 INFO L226 Difference]: Without dead ends: 362 [2018-10-12 20:48:42,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=5471, Invalid=23599, Unknown=0, NotChecked=0, Total=29070 [2018-10-12 20:48:42,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-12 20:48:42,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2018-10-12 20:48:42,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-12 20:48:42,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-10-12 20:48:42,526 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 339 [2018-10-12 20:48:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:48:42,527 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-10-12 20:48:42,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-12 20:48:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-10-12 20:48:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-12 20:48:42,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:48:42,529 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 20:48:42,529 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:48:42,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:48:42,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2103975944, now seen corresponding path program 25 times [2018-10-12 20:48:42,531 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:48:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:48:44,916 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 20:48:44,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:48:44,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-12 20:48:44,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-12 20:48:44,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-12 20:48:44,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2018-10-12 20:48:44,918 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 68 states. [2018-10-12 20:48:52,417 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:48:52,647 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:49:02,057 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:49:04,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:49:04,517 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2018-10-12 20:49:04,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-12 20:49:04,518 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 351 [2018-10-12 20:49:04,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:49:04,520 INFO L225 Difference]: With dead ends: 374 [2018-10-12 20:49:04,520 INFO L226 Difference]: Without dead ends: 374 [2018-10-12 20:49:04,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8218 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=8154, Invalid=25886, Unknown=0, NotChecked=0, Total=34040 [2018-10-12 20:49:04,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-10-12 20:49:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2018-10-12 20:49:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-12 20:49:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-10-12 20:49:04,543 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 351 [2018-10-12 20:49:04,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:49:04,543 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-10-12 20:49:04,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-12 20:49:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-10-12 20:49:04,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-12 20:49:04,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:49:04,545 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 20:49:04,545 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:49:04,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:49:04,545 INFO L82 PathProgramCache]: Analyzing trace with hash 977161214, now seen corresponding path program 26 times [2018-10-12 20:49:04,546 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:49:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:49:07,086 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 20:49:07,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:49:07,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-12 20:49:07,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-12 20:49:07,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-12 20:49:07,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2018-10-12 20:49:07,088 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 70 states. [2018-10-12 20:49:10,106 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:10,654 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:11,224 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:11,387 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:12,415 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:12,938 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 20:49:13,135 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:13,796 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:15,821 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:16,022 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:16,533 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:18,016 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:18,825 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:19,597 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:20,632 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:22,029 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:22,871 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:23,135 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:49:23,867 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:49:26,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:49:26,959 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-12 20:49:26,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-12 20:49:26,960 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 363 [2018-10-12 20:49:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:49:26,962 INFO L225 Difference]: With dead ends: 386 [2018-10-12 20:49:26,963 INFO L226 Difference]: Without dead ends: 386 [2018-10-12 20:49:26,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8540 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=8294, Invalid=27238, Unknown=0, NotChecked=0, Total=35532 [2018-10-12 20:49:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-12 20:49:26,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2018-10-12 20:49:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-12 20:49:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-10-12 20:49:26,971 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 363 [2018-10-12 20:49:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:49:26,971 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-10-12 20:49:26,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-12 20:49:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-10-12 20:49:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-12 20:49:26,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:49:26,974 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 20:49:26,974 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:49:26,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:49:26,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2034966780, now seen corresponding path program 27 times [2018-10-12 20:49:26,975 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:49:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:49:30,025 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 20:49:30,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:49:30,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-12 20:49:30,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-12 20:49:30,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-12 20:49:30,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-10-12 20:49:30,027 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 72 states. [2018-10-12 20:49:33,664 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:49:43,713 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-12 20:49:49,018 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:49:51,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:49:51,463 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-10-12 20:49:51,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-12 20:49:51,463 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 375 [2018-10-12 20:49:51,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:49:51,465 INFO L225 Difference]: With dead ends: 398 [2018-10-12 20:49:51,465 INFO L226 Difference]: Without dead ends: 398 [2018-10-12 20:49:51,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=9243, Invalid=29369, Unknown=0, NotChecked=0, Total=38612 [2018-10-12 20:49:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-12 20:49:51,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 388. [2018-10-12 20:49:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-12 20:49:51,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-12 20:49:51,471 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 375 [2018-10-12 20:49:51,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:49:51,472 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-12 20:49:51,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-12 20:49:51,472 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-12 20:49:51,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-12 20:49:51,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:49:51,474 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 20:49:51,474 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:49:51,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:49:51,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1510401782, now seen corresponding path program 28 times [2018-10-12 20:49:51,475 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:49:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:49:54,551 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 20:49:54,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:49:54,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-12 20:49:54,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-12 20:49:54,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-12 20:49:54,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=4619, Unknown=0, NotChecked=0, Total=5402 [2018-10-12 20:49:54,553 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 74 states. [2018-10-12 20:49:58,367 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-12 20:49:58,549 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:49:58,886 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-12 20:49:59,100 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:49:59,307 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:49:59,782 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:49:59,957 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:00,457 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:00,638 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:01,147 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:01,336 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:01,862 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:02,059 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:02,583 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:02,784 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:02,968 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-12 20:50:03,336 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:03,548 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:04,134 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:04,385 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:04,950 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:05,170 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:05,756 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:05,986 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:06,572 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:06,806 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:07,416 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:07,658 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:08,276 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:08,526 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:09,173 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:09,482 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:10,131 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:10,397 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:11,055 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:11,327 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:12,009 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:12,289 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:12,955 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:13,239 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-12 20:50:13,923 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-12 20:50:14,236 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-12 20:50:14,986 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-12 20:50:15,267 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-12 20:50:15,772 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-12 20:50:17,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:50:17,934 INFO L93 Difference]: Finished difference Result 410 states and 410 transitions. [2018-10-12 20:50:17,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-12 20:50:17,934 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 387 [2018-10-12 20:50:17,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:50:17,936 INFO L225 Difference]: With dead ends: 410 [2018-10-12 20:50:17,936 INFO L226 Difference]: Without dead ends: 410 [2018-10-12 20:50:17,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9425 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=8673, Invalid=30729, Unknown=0, NotChecked=0, Total=39402 [2018-10-12 20:50:17,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-10-12 20:50:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 400. [2018-10-12 20:50:17,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-12 20:50:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-10-12 20:50:17,943 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 387 [2018-10-12 20:50:17,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:50:17,943 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-10-12 20:50:17,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-12 20:50:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-10-12 20:50:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-12 20:50:17,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:50:17,946 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 20:50:17,946 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:50:17,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:50:17,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1170766352, now seen corresponding path program 29 times [2018-10-12 20:50:17,947 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:50:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:50:21,145 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 20:50:21,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:50:21,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-12 20:50:21,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-12 20:50:21,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-12 20:50:21,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4697, Unknown=0, NotChecked=0, Total=5700 [2018-10-12 20:50:21,147 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 76 states. [2018-10-12 20:50:29,575 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:50:29,804 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:50:34,814 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:50:42,159 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:50:44,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:50:44,718 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-12 20:50:44,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-12 20:50:44,719 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 399 [2018-10-12 20:50:44,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:50:44,720 INFO L225 Difference]: With dead ends: 422 [2018-10-12 20:50:44,721 INFO L226 Difference]: Without dead ends: 422 [2018-10-12 20:50:44,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10724 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=10400, Invalid=33072, Unknown=0, NotChecked=0, Total=43472 [2018-10-12 20:50:44,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-12 20:50:44,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2018-10-12 20:50:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-12 20:50:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-10-12 20:50:44,728 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 399 [2018-10-12 20:50:44,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:50:44,728 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-10-12 20:50:44,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-12 20:50:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-10-12 20:50:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-12 20:50:44,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:50:44,730 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 20:50:44,731 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:50:44,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:50:44,731 INFO L82 PathProgramCache]: Analyzing trace with hash -476020202, now seen corresponding path program 30 times [2018-10-12 20:50:44,732 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:50:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:50:47,930 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 20:50:47,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:50:47,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-12 20:50:47,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-12 20:50:47,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-12 20:50:47,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2018-10-12 20:50:47,932 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 78 states. [2018-10-12 20:50:50,166 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-12 20:50:51,392 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:50:52,532 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:50:53,151 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:50:53,311 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:50:53,767 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:50:55,221 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:50:56,507 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:50:57,191 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:50:59,368 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:00,143 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:00,390 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:51:00,680 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-12 20:51:01,855 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:04,391 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:05,270 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:05,551 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:51:06,509 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:51:07,149 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:08,061 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:08,321 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:51:08,999 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:09,956 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:51:12,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:51:12,517 INFO L93 Difference]: Finished difference Result 434 states and 434 transitions. [2018-10-12 20:51:12,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-12 20:51:12,518 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 411 [2018-10-12 20:51:12,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:51:12,519 INFO L225 Difference]: With dead ends: 434 [2018-10-12 20:51:12,519 INFO L226 Difference]: Without dead ends: 434 [2018-10-12 20:51:12,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11090 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=10556, Invalid=34600, Unknown=0, NotChecked=0, Total=45156 [2018-10-12 20:51:12,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-12 20:51:12,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2018-10-12 20:51:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-12 20:51:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-12 20:51:12,525 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 411 [2018-10-12 20:51:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:51:12,526 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-12 20:51:12,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-12 20:51:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-12 20:51:12,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-12 20:51:12,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:51:12,528 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 20:51:12,529 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:51:12,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:51:12,529 INFO L82 PathProgramCache]: Analyzing trace with hash 750694684, now seen corresponding path program 31 times [2018-10-12 20:51:12,530 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:51:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:51:15,812 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 20:51:15,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:51:15,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-12 20:51:15,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-12 20:51:15,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-12 20:51:15,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=5189, Unknown=0, NotChecked=0, Total=6320 [2018-10-12 20:51:15,813 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 80 states. [2018-10-12 20:51:20,954 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:51:25,988 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:51:31,121 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:51:35,421 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:51:36,407 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:51:38,484 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:51:41,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:51:41,918 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2018-10-12 20:51:41,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-12 20:51:41,918 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 423 [2018-10-12 20:51:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:51:41,920 INFO L225 Difference]: With dead ends: 446 [2018-10-12 20:51:41,920 INFO L226 Difference]: Without dead ends: 446 [2018-10-12 20:51:41,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12103 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=11625, Invalid=36995, Unknown=0, NotChecked=0, Total=48620 [2018-10-12 20:51:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-10-12 20:51:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2018-10-12 20:51:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-12 20:51:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-10-12 20:51:41,927 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 423 [2018-10-12 20:51:41,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:51:41,927 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-10-12 20:51:41,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-12 20:51:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-10-12 20:51:41,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-12 20:51:41,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:51:41,930 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 20:51:41,931 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:51:41,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:51:41,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1579190050, now seen corresponding path program 32 times [2018-10-12 20:51:41,932 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:51:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:51:47,451 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 20:51:47,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:51:47,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-12 20:51:47,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-12 20:51:47,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-12 20:51:47,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6090, Unknown=0, NotChecked=0, Total=6320 [2018-10-12 20:51:47,453 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 80 states. [2018-10-12 20:52:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:52:18,477 INFO L93 Difference]: Finished difference Result 458 states and 458 transitions. [2018-10-12 20:52:18,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-10-12 20:52:18,477 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 435 [2018-10-12 20:52:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:52:18,479 INFO L225 Difference]: With dead ends: 458 [2018-10-12 20:52:18,479 INFO L226 Difference]: Without dead ends: 458 [2018-10-12 20:52:18,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6811 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=2751, Invalid=35079, Unknown=0, NotChecked=0, Total=37830 [2018-10-12 20:52:18,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-10-12 20:52:18,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 448. [2018-10-12 20:52:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-10-12 20:52:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 448 transitions. [2018-10-12 20:52:18,484 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 448 transitions. Word has length 435 [2018-10-12 20:52:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:52:18,485 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 448 transitions. [2018-10-12 20:52:18,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-12 20:52:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 448 transitions. [2018-10-12 20:52:18,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-10-12 20:52:18,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:52:18,488 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 20:52:18,488 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:52:18,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:52:18,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1534884824, now seen corresponding path program 33 times [2018-10-12 20:52:18,489 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:52:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:52:22,319 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 20:52:22,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:52:22,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-10-12 20:52:22,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-12 20:52:22,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-12 20:52:22,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1267, Invalid=5705, Unknown=0, NotChecked=0, Total=6972 [2018-10-12 20:52:22,321 INFO L87 Difference]: Start difference. First operand 448 states and 448 transitions. Second operand 84 states. [2018-10-12 20:52:27,493 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:52:27,670 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:52:28,251 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:52:32,015 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:52:32,545 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:52:32,766 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:52:33,493 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-12 20:52:37,887 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:52:38,714 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:52:41,250 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:52:42,824 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-12 20:52:43,099 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-12 20:52:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:52:50,642 INFO L93 Difference]: Finished difference Result 470 states and 470 transitions. [2018-10-12 20:52:50,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-10-12 20:52:50,642 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 447 [2018-10-12 20:52:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:52:50,644 INFO L225 Difference]: With dead ends: 470 [2018-10-12 20:52:50,644 INFO L226 Difference]: Without dead ends: 470 [2018-10-12 20:52:50,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13566 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=12918, Invalid=41138, Unknown=0, NotChecked=0, Total=54056 [2018-10-12 20:52:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-10-12 20:52:50,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 460. [2018-10-12 20:52:50,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-10-12 20:52:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 460 transitions. [2018-10-12 20:52:50,650 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 460 transitions. Word has length 447 [2018-10-12 20:52:50,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:52:50,650 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 460 transitions. [2018-10-12 20:52:50,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-12 20:52:50,651 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 460 transitions. [2018-10-12 20:52:50,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-10-12 20:52:50,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:52:50,653 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 20:52:50,654 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:52:50,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:52:50,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2087004206, now seen corresponding path program 34 times [2018-10-12 20:52:50,655 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:52:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:52:54,852 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 20:52:54,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:52:54,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-10-12 20:52:54,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-12 20:52:54,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-12 20:52:54,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1271, Invalid=6039, Unknown=0, NotChecked=0, Total=7310 [2018-10-12 20:52:54,854 INFO L87 Difference]: Start difference. First operand 460 states and 460 transitions. Second operand 86 states. [2018-10-12 20:52:57,609 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-12 20:52:57,748 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:52:58,078 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 20:52:58,275 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:52:58,442 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:52:58,876 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:52:59,022 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:52:59,634 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:53:00,089 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:53:00,247 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:53:00,709 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:53:01,346 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:53:01,516 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:53:02,040 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:53:02,219 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:53:02,724 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:53:02,910 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:53:03,290 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-12 20:53:03,534 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:53:03,723 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:53:04,247 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:53:04,438 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:53:04,972 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-12 20:53:05,186 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-12 20:53:05,725 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56