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/AutomizerBplTransformed.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181015-LoopsPathprograms/gj2007_true-unreach-call_true-termination.c.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2d08e6e [2018-10-15 13:04:02,225 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-15 13:04:02,227 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-15 13:04:02,246 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-15 13:04:02,309 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-15 13:04:02,331 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-15 13:04:02,332 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-15 13:04:02,333 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-15 13:04:02,333 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-15 13:04:02,333 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-15 13:04:02,333 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-15 13:04:02,334 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-15 13:04:02,335 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-15 13:04:02,335 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-15 13:04:02,335 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-15 13:04:02,335 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-15 13:04:02,335 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-15 13:04:02,336 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-15 13:04:02,337 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-15 13:04:02,337 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-15 13:04:02,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-15 13:04:02,428 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-15 13:04:02,433 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-15 13:04:02,435 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-15 13:04:02,435 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-15 13:04:02,436 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181015-LoopsPathprograms/gj2007_true-unreach-call_true-termination.c.i_4.bpl [2018-10-15 13:04:02,437 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181015-LoopsPathprograms/gj2007_true-unreach-call_true-termination.c.i_4.bpl' [2018-10-15 13:04:02,498 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-15 13:04:02,500 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-15 13:04:02,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-15 13:04:02,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-15 13:04:02,501 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-15 13:04:02,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 01:04:02" (1/1) ... [2018-10-15 13:04:02,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 01:04:02" (1/1) ... [2018-10-15 13:04:02,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 01:04:02" (1/1) ... [2018-10-15 13:04:02,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 01:04:02" (1/1) ... [2018-10-15 13:04:02,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 01:04:02" (1/1) ... [2018-10-15 13:04:02,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 01:04:02" (1/1) ... [2018-10-15 13:04:02,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 01:04:02" (1/1) ... [2018-10-15 13:04:02,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-15 13:04:02,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-15 13:04:02,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-15 13:04:02,557 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-15 13:04:02,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 01:04:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-15 13:04:02,629 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-15 13:04:02,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-15 13:04:02,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-15 13:04:02,886 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-15 13:04:02,887 INFO L202 PluginConnector]: Adding new model gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:04:02 BoogieIcfgContainer [2018-10-15 13:04:02,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-15 13:04:02,888 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2018-10-15 13:04:02,888 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2018-10-15 13:04:02,889 INFO L276 PluginConnector]: IcfgTransformer initialized [2018-10-15 13:04:02,893 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:04:02" (1/1) ... [2018-10-15 13:04:02,898 WARN L219 ansformationObserver]: HeapSeparator: input icfg has no '#valid' array -- returning unchanged Icfg! [2018-10-15 13:04:02,914 INFO L202 PluginConnector]: Adding new model gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 15.10 01:04:02 BasicIcfg [2018-10-15 13:04:02,914 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2018-10-15 13:04:02,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-15 13:04:02,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-15 13:04:02,919 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-15 13:04:02,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.10 01:04:02" (1/3) ... [2018-10-15 13:04:02,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737f924 and model type gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:04:02, skipping insertion in model container [2018-10-15 13:04:02,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:04:02" (2/3) ... [2018-10-15 13:04:02,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737f924 and model type gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:04:02, skipping insertion in model container [2018-10-15 13:04:02,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 15.10 01:04:02" (3/3) ... [2018-10-15 13:04:02,923 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007_true-unreach-call_true-termination.c.i_4.bplleft_unchanged_by_heapseparator [2018-10-15 13:04:02,934 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-15 13:04:02,942 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-15 13:04:02,961 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-15 13:04:02,991 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-15 13:04:02,992 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-15 13:04:02,992 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-15 13:04:02,992 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-15 13:04:02,993 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-15 13:04:02,993 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-15 13:04:02,993 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-15 13:04:02,993 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-15 13:04:02,993 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-15 13:04:03,008 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-10-15 13:04:03,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-15 13:04:03,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:03,018 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:03,019 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:03,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:03,026 INFO L82 PathProgramCache]: Analyzing trace with hash 211182857, now seen corresponding path program 1 times [2018-10-15 13:04:03,081 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:03,204 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-15 13:04:03,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-15 13:04:03,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-15 13:04:03,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-15 13:04:03,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-15 13:04:03,249 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2018-10-15 13:04:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:03,385 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2018-10-15 13:04:03,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-15 13:04:03,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-10-15 13:04:03,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:03,398 INFO L225 Difference]: With dead ends: 18 [2018-10-15 13:04:03,398 INFO L226 Difference]: Without dead ends: 18 [2018-10-15 13:04:03,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-15 13:04:03,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-15 13:04:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-15 13:04:03,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-15 13:04:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-15 13:04:03,434 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2018-10-15 13:04:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:03,435 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-15 13:04:03,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-15 13:04:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-15 13:04:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-15 13:04:03,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:03,436 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:03,436 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:03,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash -192295544, now seen corresponding path program 1 times [2018-10-15 13:04:03,438 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:03,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:03,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-10-15 13:04:03,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-15 13:04:03,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-15 13:04:03,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-15 13:04:03,491 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2018-10-15 13:04:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:03,570 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-15 13:04:03,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-15 13:04:03,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-15 13:04:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:03,573 INFO L225 Difference]: With dead ends: 21 [2018-10-15 13:04:03,573 INFO L226 Difference]: Without dead ends: 21 [2018-10-15 13:04:03,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-15 13:04:03,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-15 13:04:03,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-10-15 13:04:03,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-15 13:04:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-15 13:04:03,578 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2018-10-15 13:04:03,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:03,579 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-15 13:04:03,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-15 13:04:03,579 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-15 13:04:03,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-15 13:04:03,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:03,580 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:03,580 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:03,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:03,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1396121769, now seen corresponding path program 2 times [2018-10-15 13:04:03,582 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-15 13:04:03,643 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-15 13:04:03,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-15 13:04:03,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-15 13:04:03,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-15 13:04:03,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-15 13:04:03,644 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2018-10-15 13:04:03,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:03,701 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-10-15 13:04:03,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-15 13:04:03,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-10-15 13:04:03,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:03,702 INFO L225 Difference]: With dead ends: 23 [2018-10-15 13:04:03,703 INFO L226 Difference]: Without dead ends: 23 [2018-10-15 13:04:03,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-15 13:04:03,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-15 13:04:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-10-15 13:04:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-15 13:04:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-15 13:04:03,708 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2018-10-15 13:04:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:03,709 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-15 13:04:03,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-15 13:04:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-15 13:04:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-15 13:04:03,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:03,710 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:03,711 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:03,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:03,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1141758994, now seen corresponding path program 1 times [2018-10-15 13:04:03,712 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:03,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:03,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-15 13:04:03,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-15 13:04:03,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-15 13:04:03,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-15 13:04:03,799 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-10-15 13:04:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:04,096 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-15 13:04:04,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-15 13:04:04,097 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-15 13:04:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:04,098 INFO L225 Difference]: With dead ends: 25 [2018-10-15 13:04:04,098 INFO L226 Difference]: Without dead ends: 25 [2018-10-15 13:04:04,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-15 13:04:04,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-15 13:04:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-10-15 13:04:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-15 13:04:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-15 13:04:04,103 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2018-10-15 13:04:04,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:04,103 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-15 13:04:04,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-15 13:04:04,103 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-15 13:04:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-15 13:04:04,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:04,105 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:04,105 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:04,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:04,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1446525357, now seen corresponding path program 2 times [2018-10-15 13:04:04,107 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:04,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:04,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-15 13:04:04,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-15 13:04:04,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-15 13:04:04,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-15 13:04:04,236 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2018-10-15 13:04:04,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:04,305 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-10-15 13:04:04,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-15 13:04:04,306 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-10-15 13:04:04,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:04,307 INFO L225 Difference]: With dead ends: 28 [2018-10-15 13:04:04,307 INFO L226 Difference]: Without dead ends: 28 [2018-10-15 13:04:04,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-15 13:04:04,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-15 13:04:04,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-10-15 13:04:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-15 13:04:04,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-15 13:04:04,313 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2018-10-15 13:04:04,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:04,314 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-15 13:04:04,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-15 13:04:04,314 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-15 13:04:04,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-15 13:04:04,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:04,316 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:04,316 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:04,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:04,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1477760910, now seen corresponding path program 3 times [2018-10-15 13:04:04,317 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:04,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:04,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-15 13:04:04,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-15 13:04:04,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-15 13:04:04,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-15 13:04:04,443 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2018-10-15 13:04:04,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:04,621 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-15 13:04:04,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-15 13:04:04,622 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-10-15 13:04:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:04,623 INFO L225 Difference]: With dead ends: 31 [2018-10-15 13:04:04,623 INFO L226 Difference]: Without dead ends: 31 [2018-10-15 13:04:04,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-15 13:04:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-15 13:04:04,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-10-15 13:04:04,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-15 13:04:04,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-15 13:04:04,629 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2018-10-15 13:04:04,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:04,630 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-15 13:04:04,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-15 13:04:04,630 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-15 13:04:04,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-15 13:04:04,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:04,631 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:04,631 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:04,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:04,632 INFO L82 PathProgramCache]: Analyzing trace with hash 8217101, now seen corresponding path program 4 times [2018-10-15 13:04:04,633 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:04,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:04,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-15 13:04:04,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-15 13:04:04,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-15 13:04:04,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-15 13:04:04,760 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 8 states. [2018-10-15 13:04:04,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:04,891 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-10-15 13:04:04,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-15 13:04:04,891 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-10-15 13:04:04,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:04,892 INFO L225 Difference]: With dead ends: 34 [2018-10-15 13:04:04,892 INFO L226 Difference]: Without dead ends: 34 [2018-10-15 13:04:04,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-15 13:04:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-15 13:04:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-10-15 13:04:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-15 13:04:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-15 13:04:04,897 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2018-10-15 13:04:04,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:04,898 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-15 13:04:04,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-15 13:04:04,898 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-15 13:04:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-15 13:04:04,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:04,899 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:04,900 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:04,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:04,900 INFO L82 PathProgramCache]: Analyzing trace with hash -569748690, now seen corresponding path program 5 times [2018-10-15 13:04:04,901 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 7 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:05,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:05,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-15 13:04:05,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-15 13:04:05,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-15 13:04:05,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-15 13:04:05,308 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 9 states. [2018-10-15 13:04:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:05,401 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-15 13:04:05,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-15 13:04:05,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2018-10-15 13:04:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:05,403 INFO L225 Difference]: With dead ends: 37 [2018-10-15 13:04:05,404 INFO L226 Difference]: Without dead ends: 37 [2018-10-15 13:04:05,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-15 13:04:05,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-15 13:04:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2018-10-15 13:04:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-15 13:04:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-15 13:04:05,408 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2018-10-15 13:04:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:05,409 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-15 13:04:05,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-15 13:04:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-15 13:04:05,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-15 13:04:05,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:05,410 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:05,411 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:05,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:05,411 INFO L82 PathProgramCache]: Analyzing trace with hash -224738707, now seen corresponding path program 6 times [2018-10-15 13:04:05,412 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:05,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:05,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-15 13:04:05,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-15 13:04:05,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-15 13:04:05,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-15 13:04:05,584 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 10 states. [2018-10-15 13:04:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:05,666 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-10-15 13:04:05,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-15 13:04:05,669 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2018-10-15 13:04:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:05,670 INFO L225 Difference]: With dead ends: 40 [2018-10-15 13:04:05,670 INFO L226 Difference]: Without dead ends: 40 [2018-10-15 13:04:05,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-15 13:04:05,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-15 13:04:05,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2018-10-15 13:04:05,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-15 13:04:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-15 13:04:05,675 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2018-10-15 13:04:05,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:05,675 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-15 13:04:05,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-15 13:04:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-15 13:04:05,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-15 13:04:05,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:05,677 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:05,677 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:05,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:05,678 INFO L82 PathProgramCache]: Analyzing trace with hash 110925518, now seen corresponding path program 7 times [2018-10-15 13:04:05,679 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 9 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:05,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:05,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-15 13:04:05,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-15 13:04:05,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-15 13:04:05,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-15 13:04:05,823 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 11 states. [2018-10-15 13:04:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:06,269 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-15 13:04:06,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-15 13:04:06,270 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-10-15 13:04:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:06,271 INFO L225 Difference]: With dead ends: 43 [2018-10-15 13:04:06,271 INFO L226 Difference]: Without dead ends: 43 [2018-10-15 13:04:06,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-15 13:04:06,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-15 13:04:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-10-15 13:04:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-15 13:04:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-15 13:04:06,279 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2018-10-15 13:04:06,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:06,279 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-15 13:04:06,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-15 13:04:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-15 13:04:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-15 13:04:06,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:06,281 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:06,281 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:06,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1199987405, now seen corresponding path program 8 times [2018-10-15 13:04:06,282 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:06,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:06,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-15 13:04:06,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-15 13:04:06,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-15 13:04:06,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-15 13:04:06,633 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2018-10-15 13:04:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:06,758 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-10-15 13:04:06,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-15 13:04:06,761 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2018-10-15 13:04:06,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:06,762 INFO L225 Difference]: With dead ends: 46 [2018-10-15 13:04:06,762 INFO L226 Difference]: Without dead ends: 46 [2018-10-15 13:04:06,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-15 13:04:06,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-15 13:04:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2018-10-15 13:04:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-15 13:04:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-15 13:04:06,770 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2018-10-15 13:04:06,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:06,771 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-15 13:04:06,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-15 13:04:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-15 13:04:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-15 13:04:06,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:06,772 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:06,773 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:06,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1259709038, now seen corresponding path program 9 times [2018-10-15 13:04:06,774 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 11 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:06,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:06,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-15 13:04:06,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-15 13:04:06,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-15 13:04:06,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-15 13:04:06,955 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 13 states. [2018-10-15 13:04:07,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:07,063 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-15 13:04:07,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-15 13:04:07,064 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2018-10-15 13:04:07,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:07,066 INFO L225 Difference]: With dead ends: 49 [2018-10-15 13:04:07,066 INFO L226 Difference]: Without dead ends: 49 [2018-10-15 13:04:07,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-15 13:04:07,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-15 13:04:07,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2018-10-15 13:04:07,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-15 13:04:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-15 13:04:07,071 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2018-10-15 13:04:07,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:07,071 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-15 13:04:07,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-15 13:04:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-15 13:04:07,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-15 13:04:07,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:07,073 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:07,073 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:07,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:07,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1984550099, now seen corresponding path program 10 times [2018-10-15 13:04:07,074 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 12 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:07,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:07,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-15 13:04:07,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-15 13:04:07,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-15 13:04:07,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-15 13:04:07,246 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 14 states. [2018-10-15 13:04:07,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:07,370 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-10-15 13:04:07,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-15 13:04:07,371 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2018-10-15 13:04:07,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:07,373 INFO L225 Difference]: With dead ends: 52 [2018-10-15 13:04:07,373 INFO L226 Difference]: Without dead ends: 52 [2018-10-15 13:04:07,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-15 13:04:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-15 13:04:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2018-10-15 13:04:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-15 13:04:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-15 13:04:07,378 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2018-10-15 13:04:07,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:07,379 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-15 13:04:07,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-15 13:04:07,379 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-15 13:04:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-15 13:04:07,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:07,380 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:07,381 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:07,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:07,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2059438578, now seen corresponding path program 11 times [2018-10-15 13:04:07,382 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 13 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:07,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:07,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-15 13:04:07,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-15 13:04:07,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-15 13:04:07,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-15 13:04:07,569 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 15 states. [2018-10-15 13:04:07,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:07,679 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-15 13:04:07,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-15 13:04:07,680 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2018-10-15 13:04:07,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:07,681 INFO L225 Difference]: With dead ends: 55 [2018-10-15 13:04:07,682 INFO L226 Difference]: Without dead ends: 55 [2018-10-15 13:04:07,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-15 13:04:07,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-15 13:04:07,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2018-10-15 13:04:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-15 13:04:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-15 13:04:07,687 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2018-10-15 13:04:07,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:07,687 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-15 13:04:07,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-15 13:04:07,687 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-15 13:04:07,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-15 13:04:07,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:07,689 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:07,689 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:07,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:07,689 INFO L82 PathProgramCache]: Analyzing trace with hash 320877453, now seen corresponding path program 12 times [2018-10-15 13:04:07,690 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 14 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:07,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:07,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-15 13:04:07,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-15 13:04:07,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-15 13:04:07,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-15 13:04:07,904 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 16 states. [2018-10-15 13:04:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:08,028 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-10-15 13:04:08,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-15 13:04:08,035 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2018-10-15 13:04:08,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:08,036 INFO L225 Difference]: With dead ends: 58 [2018-10-15 13:04:08,036 INFO L226 Difference]: Without dead ends: 58 [2018-10-15 13:04:08,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-15 13:04:08,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-15 13:04:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-10-15 13:04:08,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-15 13:04:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-15 13:04:08,041 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2018-10-15 13:04:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:08,041 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-15 13:04:08,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-15 13:04:08,042 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-15 13:04:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-15 13:04:08,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:08,043 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:08,043 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:08,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:08,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1889267282, now seen corresponding path program 13 times [2018-10-15 13:04:08,044 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 15 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:08,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:08,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-15 13:04:08,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-15 13:04:08,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-15 13:04:08,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-15 13:04:08,306 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 17 states. [2018-10-15 13:04:08,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:08,422 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-15 13:04:08,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-15 13:04:08,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 56 [2018-10-15 13:04:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:08,424 INFO L225 Difference]: With dead ends: 61 [2018-10-15 13:04:08,425 INFO L226 Difference]: Without dead ends: 61 [2018-10-15 13:04:08,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-15 13:04:08,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-15 13:04:08,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2018-10-15 13:04:08,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-15 13:04:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-15 13:04:08,430 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2018-10-15 13:04:08,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:08,430 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-15 13:04:08,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-15 13:04:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-15 13:04:08,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-15 13:04:08,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:08,433 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:08,433 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:08,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:08,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1832547309, now seen corresponding path program 14 times [2018-10-15 13:04:08,434 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 16 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:09,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:09,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-15 13:04:09,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-15 13:04:09,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-15 13:04:09,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-15 13:04:09,197 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 18 states. [2018-10-15 13:04:09,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:09,308 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-10-15 13:04:09,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-15 13:04:09,308 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2018-10-15 13:04:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:09,310 INFO L225 Difference]: With dead ends: 64 [2018-10-15 13:04:09,310 INFO L226 Difference]: Without dead ends: 64 [2018-10-15 13:04:09,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-15 13:04:09,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-15 13:04:09,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2018-10-15 13:04:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-15 13:04:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-15 13:04:09,315 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 59 [2018-10-15 13:04:09,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:09,316 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-15 13:04:09,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-15 13:04:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-15 13:04:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-15 13:04:09,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:09,317 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:09,317 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:09,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:09,318 INFO L82 PathProgramCache]: Analyzing trace with hash -464685746, now seen corresponding path program 15 times [2018-10-15 13:04:09,319 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 17 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:09,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:09,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-15 13:04:09,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-15 13:04:09,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-15 13:04:09,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-15 13:04:09,791 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 19 states. [2018-10-15 13:04:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:10,050 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-15 13:04:10,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-15 13:04:10,050 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2018-10-15 13:04:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:10,051 INFO L225 Difference]: With dead ends: 67 [2018-10-15 13:04:10,051 INFO L226 Difference]: Without dead ends: 67 [2018-10-15 13:04:10,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-15 13:04:10,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-15 13:04:10,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2018-10-15 13:04:10,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-15 13:04:10,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-15 13:04:10,055 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2018-10-15 13:04:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:10,056 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-15 13:04:10,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-15 13:04:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-15 13:04:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-15 13:04:10,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:10,057 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:10,057 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:10,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:10,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1325732787, now seen corresponding path program 16 times [2018-10-15 13:04:10,058 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 18 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:10,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:10,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-15 13:04:10,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-15 13:04:10,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-15 13:04:10,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-15 13:04:10,301 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 20 states. [2018-10-15 13:04:10,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:10,463 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-10-15 13:04:10,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-15 13:04:10,464 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2018-10-15 13:04:10,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:10,465 INFO L225 Difference]: With dead ends: 70 [2018-10-15 13:04:10,465 INFO L226 Difference]: Without dead ends: 70 [2018-10-15 13:04:10,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-15 13:04:10,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-15 13:04:10,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2018-10-15 13:04:10,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-15 13:04:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-15 13:04:10,469 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2018-10-15 13:04:10,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:10,469 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-15 13:04:10,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-15 13:04:10,469 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-15 13:04:10,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-15 13:04:10,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:10,470 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:10,470 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:10,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:10,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1061527790, now seen corresponding path program 17 times [2018-10-15 13:04:10,472 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 19 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:10,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:10,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-15 13:04:10,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-15 13:04:10,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-15 13:04:10,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-15 13:04:10,763 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 21 states. [2018-10-15 13:04:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:10,958 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-15 13:04:10,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-15 13:04:10,959 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2018-10-15 13:04:10,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:10,960 INFO L225 Difference]: With dead ends: 73 [2018-10-15 13:04:10,960 INFO L226 Difference]: Without dead ends: 73 [2018-10-15 13:04:10,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-15 13:04:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-15 13:04:10,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2018-10-15 13:04:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-15 13:04:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-15 13:04:10,964 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2018-10-15 13:04:10,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:10,965 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-15 13:04:10,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-15 13:04:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-15 13:04:10,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-15 13:04:10,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:10,966 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:10,966 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:10,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:10,966 INFO L82 PathProgramCache]: Analyzing trace with hash -422077267, now seen corresponding path program 18 times [2018-10-15 13:04:10,967 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 20 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:11,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:11,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-15 13:04:11,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-15 13:04:11,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-15 13:04:11,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-15 13:04:11,435 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 22 states. [2018-10-15 13:04:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:11,585 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-10-15 13:04:11,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-15 13:04:11,586 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 71 [2018-10-15 13:04:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:11,586 INFO L225 Difference]: With dead ends: 76 [2018-10-15 13:04:11,587 INFO L226 Difference]: Without dead ends: 76 [2018-10-15 13:04:11,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-15 13:04:11,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-15 13:04:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2018-10-15 13:04:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-15 13:04:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-15 13:04:11,590 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2018-10-15 13:04:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:11,590 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-15 13:04:11,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-15 13:04:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-15 13:04:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-15 13:04:11,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:11,591 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:11,592 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:11,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:11,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1008112782, now seen corresponding path program 19 times [2018-10-15 13:04:11,593 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 21 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:12,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:12,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-15 13:04:12,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-15 13:04:12,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-15 13:04:12,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-15 13:04:12,658 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 23 states. [2018-10-15 13:04:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:12,821 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-15 13:04:12,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-15 13:04:12,823 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 74 [2018-10-15 13:04:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:12,824 INFO L225 Difference]: With dead ends: 79 [2018-10-15 13:04:12,824 INFO L226 Difference]: Without dead ends: 79 [2018-10-15 13:04:12,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-15 13:04:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-15 13:04:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2018-10-15 13:04:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-15 13:04:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-15 13:04:12,827 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2018-10-15 13:04:12,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:12,827 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-15 13:04:12,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-15 13:04:12,827 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-15 13:04:12,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-15 13:04:12,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:12,828 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:12,828 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:12,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:12,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1724286221, now seen corresponding path program 20 times [2018-10-15 13:04:12,829 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 22 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:13,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:13,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-15 13:04:13,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-15 13:04:13,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-15 13:04:13,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-15 13:04:13,203 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 24 states. [2018-10-15 13:04:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:13,384 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-10-15 13:04:13,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-15 13:04:13,385 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2018-10-15 13:04:13,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:13,386 INFO L225 Difference]: With dead ends: 82 [2018-10-15 13:04:13,386 INFO L226 Difference]: Without dead ends: 82 [2018-10-15 13:04:13,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-15 13:04:13,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-15 13:04:13,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2018-10-15 13:04:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-15 13:04:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-15 13:04:13,390 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2018-10-15 13:04:13,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:13,390 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-15 13:04:13,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-15 13:04:13,390 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-15 13:04:13,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-15 13:04:13,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:13,391 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:13,392 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:13,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:13,392 INFO L82 PathProgramCache]: Analyzing trace with hash -150319058, now seen corresponding path program 21 times [2018-10-15 13:04:13,393 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 23 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:13,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:13,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-15 13:04:13,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-15 13:04:13,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-15 13:04:13,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-15 13:04:13,722 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-10-15 13:04:13,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:13,959 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-15 13:04:13,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-15 13:04:13,959 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-10-15 13:04:13,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:13,960 INFO L225 Difference]: With dead ends: 85 [2018-10-15 13:04:13,960 INFO L226 Difference]: Without dead ends: 85 [2018-10-15 13:04:13,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-15 13:04:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-15 13:04:13,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2018-10-15 13:04:13,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-15 13:04:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-15 13:04:13,963 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2018-10-15 13:04:13,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:13,963 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-15 13:04:13,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-15 13:04:13,963 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-15 13:04:13,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-15 13:04:13,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:13,964 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:13,965 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:13,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:13,965 INFO L82 PathProgramCache]: Analyzing trace with hash 943564141, now seen corresponding path program 22 times [2018-10-15 13:04:13,966 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 24 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:14,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:14,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-15 13:04:14,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-15 13:04:14,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-15 13:04:14,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-15 13:04:14,504 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 26 states. [2018-10-15 13:04:14,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:14,761 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2018-10-15 13:04:14,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-15 13:04:14,762 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 83 [2018-10-15 13:04:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:14,763 INFO L225 Difference]: With dead ends: 88 [2018-10-15 13:04:14,763 INFO L226 Difference]: Without dead ends: 88 [2018-10-15 13:04:14,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-15 13:04:14,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-15 13:04:14,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2018-10-15 13:04:14,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-15 13:04:14,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-15 13:04:14,768 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 83 [2018-10-15 13:04:14,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:14,768 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-15 13:04:14,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-15 13:04:14,769 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-15 13:04:14,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-15 13:04:14,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:14,770 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:14,770 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:14,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:14,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1393896498, now seen corresponding path program 23 times [2018-10-15 13:04:14,771 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 25 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:15,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:15,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-15 13:04:15,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-15 13:04:15,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-15 13:04:15,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-15 13:04:15,436 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 27 states. [2018-10-15 13:04:15,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:15,597 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-10-15 13:04:15,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-15 13:04:15,598 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 86 [2018-10-15 13:04:15,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:15,599 INFO L225 Difference]: With dead ends: 91 [2018-10-15 13:04:15,599 INFO L226 Difference]: Without dead ends: 91 [2018-10-15 13:04:15,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-15 13:04:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-15 13:04:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2018-10-15 13:04:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-15 13:04:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-15 13:04:15,603 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2018-10-15 13:04:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:15,603 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-15 13:04:15,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-15 13:04:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-15 13:04:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-15 13:04:15,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:15,604 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:15,604 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:15,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:15,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1915944397, now seen corresponding path program 24 times [2018-10-15 13:04:15,605 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 26 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:16,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:16,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-15 13:04:16,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-15 13:04:16,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-15 13:04:16,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-15 13:04:16,316 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 28 states. [2018-10-15 13:04:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:16,483 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2018-10-15 13:04:16,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-15 13:04:16,484 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 89 [2018-10-15 13:04:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:16,485 INFO L225 Difference]: With dead ends: 94 [2018-10-15 13:04:16,485 INFO L226 Difference]: Without dead ends: 94 [2018-10-15 13:04:16,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-15 13:04:16,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-15 13:04:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2018-10-15 13:04:16,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-15 13:04:16,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-15 13:04:16,488 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 89 [2018-10-15 13:04:16,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:16,488 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-15 13:04:16,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-15 13:04:16,488 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-15 13:04:16,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-15 13:04:16,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:16,489 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:16,489 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:16,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:16,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1526865774, now seen corresponding path program 25 times [2018-10-15 13:04:16,491 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 27 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:17,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:17,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-15 13:04:17,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-15 13:04:17,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-15 13:04:17,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-15 13:04:17,712 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 29 states. [2018-10-15 13:04:17,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:17,975 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-15 13:04:17,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-15 13:04:17,976 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2018-10-15 13:04:17,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:17,977 INFO L225 Difference]: With dead ends: 97 [2018-10-15 13:04:17,977 INFO L226 Difference]: Without dead ends: 97 [2018-10-15 13:04:17,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-15 13:04:17,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-15 13:04:17,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2018-10-15 13:04:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-15 13:04:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-10-15 13:04:17,981 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2018-10-15 13:04:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:17,981 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-10-15 13:04:17,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-15 13:04:17,981 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-10-15 13:04:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-15 13:04:17,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:17,982 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:17,982 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:17,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:17,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1692627411, now seen corresponding path program 26 times [2018-10-15 13:04:17,983 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 28 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:18,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:18,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-15 13:04:18,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-15 13:04:18,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-15 13:04:18,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-15 13:04:18,404 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 30 states. [2018-10-15 13:04:18,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:18,604 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2018-10-15 13:04:18,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-15 13:04:18,609 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 95 [2018-10-15 13:04:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:18,610 INFO L225 Difference]: With dead ends: 100 [2018-10-15 13:04:18,610 INFO L226 Difference]: Without dead ends: 100 [2018-10-15 13:04:18,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-15 13:04:18,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-15 13:04:18,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2018-10-15 13:04:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-15 13:04:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-15 13:04:18,615 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 95 [2018-10-15 13:04:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:18,616 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-15 13:04:18,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-15 13:04:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-15 13:04:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-15 13:04:18,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:18,617 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:18,617 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:18,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:18,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1595552526, now seen corresponding path program 27 times [2018-10-15 13:04:18,618 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 29 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:19,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:19,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-15 13:04:19,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-15 13:04:19,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-15 13:04:19,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-15 13:04:19,549 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 31 states. [2018-10-15 13:04:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:19,717 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-10-15 13:04:19,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-15 13:04:19,717 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 98 [2018-10-15 13:04:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:19,718 INFO L225 Difference]: With dead ends: 103 [2018-10-15 13:04:19,718 INFO L226 Difference]: Without dead ends: 103 [2018-10-15 13:04:19,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-15 13:04:19,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-15 13:04:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2018-10-15 13:04:19,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-15 13:04:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-15 13:04:19,722 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 98 [2018-10-15 13:04:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:19,722 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-15 13:04:19,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-15 13:04:19,722 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-15 13:04:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-15 13:04:19,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:19,723 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:19,723 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:19,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:19,723 INFO L82 PathProgramCache]: Analyzing trace with hash 149968525, now seen corresponding path program 28 times [2018-10-15 13:04:19,724 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 30 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:20,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:20,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-15 13:04:20,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-15 13:04:20,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-15 13:04:20,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-15 13:04:20,181 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 32 states. [2018-10-15 13:04:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:20,485 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2018-10-15 13:04:20,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-15 13:04:20,486 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 101 [2018-10-15 13:04:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:20,487 INFO L225 Difference]: With dead ends: 106 [2018-10-15 13:04:20,487 INFO L226 Difference]: Without dead ends: 106 [2018-10-15 13:04:20,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-15 13:04:20,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-15 13:04:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2018-10-15 13:04:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-15 13:04:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-15 13:04:20,492 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 101 [2018-10-15 13:04:20,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:20,493 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-15 13:04:20,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-15 13:04:20,493 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-15 13:04:20,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-15 13:04:20,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:20,494 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:20,494 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:20,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:20,495 INFO L82 PathProgramCache]: Analyzing trace with hash 394071726, now seen corresponding path program 29 times [2018-10-15 13:04:20,495 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 31 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:21,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:21,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-15 13:04:21,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-15 13:04:21,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-15 13:04:21,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-15 13:04:21,072 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 33 states. [2018-10-15 13:04:21,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:21,342 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-15 13:04:21,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-15 13:04:21,342 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 104 [2018-10-15 13:04:21,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:21,343 INFO L225 Difference]: With dead ends: 109 [2018-10-15 13:04:21,343 INFO L226 Difference]: Without dead ends: 109 [2018-10-15 13:04:21,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-15 13:04:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-15 13:04:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2018-10-15 13:04:21,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-15 13:04:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-15 13:04:21,346 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2018-10-15 13:04:21,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:21,347 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-15 13:04:21,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-15 13:04:21,347 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-15 13:04:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-15 13:04:21,347 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:21,348 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:21,348 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:21,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:21,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1092900589, now seen corresponding path program 30 times [2018-10-15 13:04:21,349 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 32 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:22,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:22,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-15 13:04:22,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-15 13:04:22,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-15 13:04:22,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-15 13:04:22,047 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 34 states. [2018-10-15 13:04:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:22,259 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2018-10-15 13:04:22,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-15 13:04:22,259 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 107 [2018-10-15 13:04:22,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:22,260 INFO L225 Difference]: With dead ends: 112 [2018-10-15 13:04:22,261 INFO L226 Difference]: Without dead ends: 112 [2018-10-15 13:04:22,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-15 13:04:22,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-15 13:04:22,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2018-10-15 13:04:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-15 13:04:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-15 13:04:22,264 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 107 [2018-10-15 13:04:22,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:22,264 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-15 13:04:22,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-15 13:04:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-15 13:04:22,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-15 13:04:22,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:22,265 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:22,266 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:22,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:22,266 INFO L82 PathProgramCache]: Analyzing trace with hash -2097892786, now seen corresponding path program 31 times [2018-10-15 13:04:22,266 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1585 backedges. 33 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:22,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:22,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-15 13:04:22,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-15 13:04:22,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-15 13:04:22,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-15 13:04:22,916 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 35 states. [2018-10-15 13:04:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:23,144 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-10-15 13:04:23,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-15 13:04:23,149 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 110 [2018-10-15 13:04:23,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:23,150 INFO L225 Difference]: With dead ends: 115 [2018-10-15 13:04:23,150 INFO L226 Difference]: Without dead ends: 115 [2018-10-15 13:04:23,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-15 13:04:23,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-15 13:04:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2018-10-15 13:04:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-15 13:04:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-10-15 13:04:23,153 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 110 [2018-10-15 13:04:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:23,153 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-10-15 13:04:23,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-15 13:04:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-10-15 13:04:23,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-15 13:04:23,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:23,154 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:23,155 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:23,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:23,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1487834957, now seen corresponding path program 32 times [2018-10-15 13:04:23,156 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 34 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:23,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:23,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-15 13:04:23,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-15 13:04:23,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-15 13:04:23,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-15 13:04:23,695 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 36 states. [2018-10-15 13:04:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:23,910 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2018-10-15 13:04:23,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-15 13:04:23,911 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 113 [2018-10-15 13:04:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:23,912 INFO L225 Difference]: With dead ends: 118 [2018-10-15 13:04:23,912 INFO L226 Difference]: Without dead ends: 118 [2018-10-15 13:04:23,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-15 13:04:23,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-15 13:04:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2018-10-15 13:04:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-15 13:04:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-15 13:04:23,916 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2018-10-15 13:04:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:23,916 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-15 13:04:23,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-15 13:04:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-15 13:04:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-15 13:04:23,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:23,916 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:23,917 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:23,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:23,917 INFO L82 PathProgramCache]: Analyzing trace with hash -523559442, now seen corresponding path program 33 times [2018-10-15 13:04:23,918 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 35 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:24,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:24,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-15 13:04:24,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-15 13:04:24,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-15 13:04:24,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-15 13:04:24,776 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 37 states. [2018-10-15 13:04:24,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:24,940 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-15 13:04:24,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-15 13:04:24,940 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 116 [2018-10-15 13:04:24,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:24,942 INFO L225 Difference]: With dead ends: 121 [2018-10-15 13:04:24,942 INFO L226 Difference]: Without dead ends: 121 [2018-10-15 13:04:24,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-15 13:04:24,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-15 13:04:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2018-10-15 13:04:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-15 13:04:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-10-15 13:04:24,946 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2018-10-15 13:04:24,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:24,946 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-10-15 13:04:24,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-15 13:04:24,946 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-10-15 13:04:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-15 13:04:24,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:24,947 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:24,948 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:24,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:24,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1409613741, now seen corresponding path program 34 times [2018-10-15 13:04:24,949 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 36 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:25,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:25,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-15 13:04:25,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-15 13:04:25,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-15 13:04:25,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-15 13:04:25,768 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 38 states. [2018-10-15 13:04:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:25,990 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2018-10-15 13:04:25,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-15 13:04:25,990 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 119 [2018-10-15 13:04:25,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:25,991 INFO L225 Difference]: With dead ends: 124 [2018-10-15 13:04:25,991 INFO L226 Difference]: Without dead ends: 124 [2018-10-15 13:04:25,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-15 13:04:25,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-15 13:04:25,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2018-10-15 13:04:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-15 13:04:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-15 13:04:25,994 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 119 [2018-10-15 13:04:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:25,995 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-15 13:04:25,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-15 13:04:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-15 13:04:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-15 13:04:25,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:25,996 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:25,996 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:25,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1355436430, now seen corresponding path program 35 times [2018-10-15 13:04:25,997 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1999 backedges. 37 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:26,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:26,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-15 13:04:26,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-15 13:04:26,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-15 13:04:26,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-15 13:04:26,647 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 39 states. [2018-10-15 13:04:26,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:26,951 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2018-10-15 13:04:26,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-15 13:04:26,951 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 122 [2018-10-15 13:04:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:26,952 INFO L225 Difference]: With dead ends: 127 [2018-10-15 13:04:26,952 INFO L226 Difference]: Without dead ends: 127 [2018-10-15 13:04:26,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-15 13:04:26,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-15 13:04:26,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2018-10-15 13:04:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-15 13:04:26,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-10-15 13:04:26,956 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 122 [2018-10-15 13:04:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:26,957 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-10-15 13:04:26,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-15 13:04:26,957 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-10-15 13:04:26,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-15 13:04:26,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:26,958 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:26,958 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:26,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:26,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2028099571, now seen corresponding path program 36 times [2018-10-15 13:04:26,959 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2110 backedges. 38 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:27,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:27,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-15 13:04:27,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-15 13:04:27,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-15 13:04:27,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-15 13:04:27,729 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 40 states. [2018-10-15 13:04:28,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:28,009 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2018-10-15 13:04:28,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-15 13:04:28,010 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 125 [2018-10-15 13:04:28,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:28,011 INFO L225 Difference]: With dead ends: 130 [2018-10-15 13:04:28,011 INFO L226 Difference]: Without dead ends: 130 [2018-10-15 13:04:28,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-15 13:04:28,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-15 13:04:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2018-10-15 13:04:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-15 13:04:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-15 13:04:28,015 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 125 [2018-10-15 13:04:28,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:28,015 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-15 13:04:28,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-15 13:04:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-15 13:04:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-15 13:04:28,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:28,016 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:28,016 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:28,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:28,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1933331758, now seen corresponding path program 37 times [2018-10-15 13:04:28,017 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2224 backedges. 39 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:29,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:29,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-15 13:04:29,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-15 13:04:29,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-15 13:04:29,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-15 13:04:29,137 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 41 states. [2018-10-15 13:04:29,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:29,726 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-15 13:04:29,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-15 13:04:29,727 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 128 [2018-10-15 13:04:29,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:29,730 INFO L225 Difference]: With dead ends: 133 [2018-10-15 13:04:29,730 INFO L226 Difference]: Without dead ends: 133 [2018-10-15 13:04:29,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-15 13:04:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-15 13:04:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2018-10-15 13:04:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-15 13:04:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2018-10-15 13:04:29,733 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2018-10-15 13:04:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:29,733 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2018-10-15 13:04:29,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-15 13:04:29,733 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2018-10-15 13:04:29,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-15 13:04:29,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:29,734 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:29,734 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:29,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:29,734 INFO L82 PathProgramCache]: Analyzing trace with hash -177305491, now seen corresponding path program 38 times [2018-10-15 13:04:29,735 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2341 backedges. 40 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:30,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:30,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-15 13:04:30,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-15 13:04:30,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-15 13:04:30,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-15 13:04:30,830 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 42 states. [2018-10-15 13:04:31,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:31,016 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2018-10-15 13:04:31,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-15 13:04:31,017 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 131 [2018-10-15 13:04:31,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:31,018 INFO L225 Difference]: With dead ends: 136 [2018-10-15 13:04:31,018 INFO L226 Difference]: Without dead ends: 136 [2018-10-15 13:04:31,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-15 13:04:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-15 13:04:31,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2018-10-15 13:04:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-15 13:04:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-15 13:04:31,023 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 131 [2018-10-15 13:04:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:31,023 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-15 13:04:31,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-15 13:04:31,024 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-15 13:04:31,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-15 13:04:31,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:31,024 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:31,025 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:31,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:31,025 INFO L82 PathProgramCache]: Analyzing trace with hash 149622990, now seen corresponding path program 39 times [2018-10-15 13:04:31,026 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2461 backedges. 41 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:32,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:32,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-15 13:04:32,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-15 13:04:32,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-15 13:04:32,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-15 13:04:32,123 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 43 states. [2018-10-15 13:04:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:34,066 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2018-10-15 13:04:34,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-15 13:04:34,067 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 134 [2018-10-15 13:04:34,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:34,068 INFO L225 Difference]: With dead ends: 139 [2018-10-15 13:04:34,068 INFO L226 Difference]: Without dead ends: 139 [2018-10-15 13:04:34,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-15 13:04:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-15 13:04:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2018-10-15 13:04:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-15 13:04:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-10-15 13:04:34,073 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 134 [2018-10-15 13:04:34,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:34,073 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-10-15 13:04:34,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-15 13:04:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-10-15 13:04:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-15 13:04:34,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:34,074 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:34,075 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:34,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:34,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1309826867, now seen corresponding path program 40 times [2018-10-15 13:04:34,076 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 42 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:35,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:35,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-15 13:04:35,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-15 13:04:35,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-15 13:04:35,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-15 13:04:35,250 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 44 states. [2018-10-15 13:04:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:35,523 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2018-10-15 13:04:35,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-15 13:04:35,523 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 137 [2018-10-15 13:04:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:35,524 INFO L225 Difference]: With dead ends: 142 [2018-10-15 13:04:35,524 INFO L226 Difference]: Without dead ends: 142 [2018-10-15 13:04:35,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-15 13:04:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-15 13:04:35,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2018-10-15 13:04:35,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-15 13:04:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-15 13:04:35,528 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 137 [2018-10-15 13:04:35,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:35,528 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-15 13:04:35,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-15 13:04:35,529 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-15 13:04:35,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-15 13:04:35,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:35,530 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:35,530 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:35,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:35,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1826579346, now seen corresponding path program 41 times [2018-10-15 13:04:35,531 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 43 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:36,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:36,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-15 13:04:36,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-15 13:04:36,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-15 13:04:36,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-15 13:04:36,702 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 45 states. [2018-10-15 13:04:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:36,890 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-15 13:04:36,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-15 13:04:36,890 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 140 [2018-10-15 13:04:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:36,891 INFO L225 Difference]: With dead ends: 145 [2018-10-15 13:04:36,891 INFO L226 Difference]: Without dead ends: 145 [2018-10-15 13:04:36,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-15 13:04:36,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-15 13:04:36,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2018-10-15 13:04:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-15 13:04:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2018-10-15 13:04:36,896 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2018-10-15 13:04:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:36,896 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2018-10-15 13:04:36,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-15 13:04:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2018-10-15 13:04:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-15 13:04:36,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:36,897 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:36,898 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:36,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:36,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1058074925, now seen corresponding path program 42 times [2018-10-15 13:04:36,898 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 44 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:38,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:38,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-15 13:04:38,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-15 13:04:38,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-15 13:04:38,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-15 13:04:38,520 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 46 states. [2018-10-15 13:04:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:38,806 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2018-10-15 13:04:38,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-15 13:04:38,806 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 143 [2018-10-15 13:04:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:38,807 INFO L225 Difference]: With dead ends: 148 [2018-10-15 13:04:38,808 INFO L226 Difference]: Without dead ends: 148 [2018-10-15 13:04:38,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-15 13:04:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-15 13:04:38,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2018-10-15 13:04:38,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-15 13:04:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-15 13:04:38,811 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 143 [2018-10-15 13:04:38,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:38,812 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-15 13:04:38,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-15 13:04:38,812 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-15 13:04:38,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-15 13:04:38,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:38,813 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:38,813 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:38,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:38,813 INFO L82 PathProgramCache]: Analyzing trace with hash -207163378, now seen corresponding path program 43 times [2018-10-15 13:04:38,814 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 45 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:39,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:39,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-15 13:04:39,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-15 13:04:39,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-15 13:04:39,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-15 13:04:39,988 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 47 states. [2018-10-15 13:04:40,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:40,305 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2018-10-15 13:04:40,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-15 13:04:40,305 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 146 [2018-10-15 13:04:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:40,307 INFO L225 Difference]: With dead ends: 151 [2018-10-15 13:04:40,307 INFO L226 Difference]: Without dead ends: 151 [2018-10-15 13:04:40,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-15 13:04:40,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-15 13:04:40,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2018-10-15 13:04:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-15 13:04:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-10-15 13:04:40,310 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 146 [2018-10-15 13:04:40,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:40,310 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-10-15 13:04:40,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-15 13:04:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-10-15 13:04:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-15 13:04:40,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:40,311 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:40,311 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:40,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:40,311 INFO L82 PathProgramCache]: Analyzing trace with hash -288458355, now seen corresponding path program 44 times [2018-10-15 13:04:40,312 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3106 backedges. 46 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:41,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:41,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-15 13:04:41,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-15 13:04:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-15 13:04:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-15 13:04:41,419 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 48 states. [2018-10-15 13:04:41,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:41,654 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2018-10-15 13:04:41,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-15 13:04:41,654 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 149 [2018-10-15 13:04:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:41,656 INFO L225 Difference]: With dead ends: 154 [2018-10-15 13:04:41,656 INFO L226 Difference]: Without dead ends: 154 [2018-10-15 13:04:41,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-15 13:04:41,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-15 13:04:41,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2018-10-15 13:04:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-15 13:04:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-15 13:04:41,660 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 149 [2018-10-15 13:04:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:41,660 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-15 13:04:41,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-15 13:04:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-15 13:04:41,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-15 13:04:41,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:41,661 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:41,662 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:41,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:41,662 INFO L82 PathProgramCache]: Analyzing trace with hash 214436782, now seen corresponding path program 45 times [2018-10-15 13:04:41,663 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3244 backedges. 47 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:42,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:42,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-15 13:04:42,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-15 13:04:42,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-15 13:04:42,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-15 13:04:42,608 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 49 states. [2018-10-15 13:04:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:42,935 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-15 13:04:42,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-15 13:04:42,936 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 152 [2018-10-15 13:04:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:42,937 INFO L225 Difference]: With dead ends: 157 [2018-10-15 13:04:42,937 INFO L226 Difference]: Without dead ends: 157 [2018-10-15 13:04:42,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-15 13:04:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-15 13:04:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2018-10-15 13:04:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-15 13:04:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-10-15 13:04:42,941 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2018-10-15 13:04:42,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:42,941 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-10-15 13:04:42,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-15 13:04:42,941 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-10-15 13:04:42,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-15 13:04:42,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:42,942 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:42,942 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:42,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:42,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1117534701, now seen corresponding path program 46 times [2018-10-15 13:04:42,943 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3385 backedges. 48 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:44,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:44,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-15 13:04:44,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-15 13:04:44,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-15 13:04:44,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-15 13:04:44,005 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 50 states. [2018-10-15 13:04:44,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:44,251 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2018-10-15 13:04:44,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-15 13:04:44,252 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 155 [2018-10-15 13:04:44,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:44,253 INFO L225 Difference]: With dead ends: 160 [2018-10-15 13:04:44,253 INFO L226 Difference]: Without dead ends: 160 [2018-10-15 13:04:44,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-15 13:04:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-15 13:04:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2018-10-15 13:04:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-15 13:04:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-15 13:04:44,258 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 155 [2018-10-15 13:04:44,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:44,258 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-15 13:04:44,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-15 13:04:44,258 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-15 13:04:44,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-15 13:04:44,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:44,259 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:44,260 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:44,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:44,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1632497486, now seen corresponding path program 47 times [2018-10-15 13:04:44,261 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3529 backedges. 49 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:45,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:45,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-15 13:04:45,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-15 13:04:45,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-15 13:04:45,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-15 13:04:45,766 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 51 states. [2018-10-15 13:04:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:46,088 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2018-10-15 13:04:46,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-15 13:04:46,089 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 158 [2018-10-15 13:04:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:46,090 INFO L225 Difference]: With dead ends: 163 [2018-10-15 13:04:46,090 INFO L226 Difference]: Without dead ends: 163 [2018-10-15 13:04:46,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-15 13:04:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-15 13:04:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2018-10-15 13:04:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-15 13:04:46,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2018-10-15 13:04:46,094 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 158 [2018-10-15 13:04:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:46,094 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2018-10-15 13:04:46,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-15 13:04:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2018-10-15 13:04:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-15 13:04:46,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:46,095 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:46,096 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:46,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:46,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1265644109, now seen corresponding path program 48 times [2018-10-15 13:04:46,097 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3676 backedges. 50 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-15 13:04:49,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:49,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-15 13:04:49,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-15 13:04:49,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-15 13:04:49,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-15 13:04:49,369 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 52 states. [2018-10-15 13:04:49,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:49,719 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-10-15 13:04:49,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-15 13:04:49,719 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 161 [2018-10-15 13:04:49,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:49,720 INFO L225 Difference]: With dead ends: 165 [2018-10-15 13:04:49,720 INFO L226 Difference]: Without dead ends: 165 [2018-10-15 13:04:49,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-15 13:04:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-15 13:04:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-15 13:04:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-15 13:04:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-15 13:04:49,724 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 161 [2018-10-15 13:04:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:49,724 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-15 13:04:49,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-15 13:04:49,724 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-15 13:04:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-15 13:04:49,725 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:49,725 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:49,725 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:49,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:49,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1266509074, now seen corresponding path program 49 times [2018-10-15 13:04:49,726 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3826 backedges. 199 proven. 1 refuted. 0 times theorem prover too weak. 3626 trivial. 0 not checked. [2018-10-15 13:04:50,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:50,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-15 13:04:50,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-15 13:04:50,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-15 13:04:50,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-15 13:04:50,003 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 5 states. [2018-10-15 13:04:50,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:50,256 INFO L93 Difference]: Finished difference Result 171 states and 174 transitions. [2018-10-15 13:04:50,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-15 13:04:50,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2018-10-15 13:04:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:50,259 INFO L225 Difference]: With dead ends: 171 [2018-10-15 13:04:50,259 INFO L226 Difference]: Without dead ends: 171 [2018-10-15 13:04:50,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-15 13:04:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-15 13:04:50,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2018-10-15 13:04:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-15 13:04:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-10-15 13:04:50,265 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2018-10-15 13:04:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:50,265 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-10-15 13:04:50,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-15 13:04:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-10-15 13:04:50,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-15 13:04:50,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:50,267 INFO L375 BasicCegarLoop]: trace histogram [52, 50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:50,267 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:50,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:50,267 INFO L82 PathProgramCache]: Analyzing trace with hash 985461683, now seen corresponding path program 50 times [2018-10-15 13:04:50,268 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3931 backedges. 573 proven. 21 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:04:50,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:50,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-15 13:04:50,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-15 13:04:50,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-15 13:04:50,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-15 13:04:50,935 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 8 states. [2018-10-15 13:04:51,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:51,473 INFO L93 Difference]: Finished difference Result 183 states and 189 transitions. [2018-10-15 13:04:51,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-15 13:04:51,474 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 168 [2018-10-15 13:04:51,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:51,477 INFO L225 Difference]: With dead ends: 183 [2018-10-15 13:04:51,478 INFO L226 Difference]: Without dead ends: 183 [2018-10-15 13:04:51,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-15 13:04:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-15 13:04:51,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2018-10-15 13:04:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-15 13:04:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 186 transitions. [2018-10-15 13:04:51,482 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 186 transitions. Word has length 168 [2018-10-15 13:04:51,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:51,482 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 186 transitions. [2018-10-15 13:04:51,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-15 13:04:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 186 transitions. [2018-10-15 13:04:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-15 13:04:51,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:51,487 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 50, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:51,487 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:51,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:51,488 INFO L82 PathProgramCache]: Analyzing trace with hash -700875006, now seen corresponding path program 51 times [2018-10-15 13:04:51,488 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4270 backedges. 861 proven. 72 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:04:51,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:51,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-15 13:04:51,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-15 13:04:51,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-15 13:04:51,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-15 13:04:51,703 INFO L87 Difference]: Start difference. First operand 181 states and 186 transitions. Second operand 11 states. [2018-10-15 13:04:51,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:51,761 INFO L93 Difference]: Finished difference Result 195 states and 204 transitions. [2018-10-15 13:04:51,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-15 13:04:51,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 180 [2018-10-15 13:04:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:51,765 INFO L225 Difference]: With dead ends: 195 [2018-10-15 13:04:51,765 INFO L226 Difference]: Without dead ends: 195 [2018-10-15 13:04:51,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-15 13:04:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-15 13:04:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2018-10-15 13:04:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-15 13:04:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 201 transitions. [2018-10-15 13:04:51,769 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 201 transitions. Word has length 180 [2018-10-15 13:04:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:51,769 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 201 transitions. [2018-10-15 13:04:51,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-15 13:04:51,770 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 201 transitions. [2018-10-15 13:04:51,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-15 13:04:51,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:51,771 INFO L375 BasicCegarLoop]: trace histogram [58, 50, 50, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:51,771 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:51,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:51,772 INFO L82 PathProgramCache]: Analyzing trace with hash -693335087, now seen corresponding path program 52 times [2018-10-15 13:04:51,773 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4645 backedges. 1149 proven. 159 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:04:52,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:52,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-15 13:04:52,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-15 13:04:52,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-15 13:04:52,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-15 13:04:52,207 INFO L87 Difference]: Start difference. First operand 193 states and 201 transitions. Second operand 14 states. [2018-10-15 13:04:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:52,278 INFO L93 Difference]: Finished difference Result 207 states and 219 transitions. [2018-10-15 13:04:52,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-15 13:04:52,278 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 192 [2018-10-15 13:04:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:52,280 INFO L225 Difference]: With dead ends: 207 [2018-10-15 13:04:52,280 INFO L226 Difference]: Without dead ends: 207 [2018-10-15 13:04:52,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-15 13:04:52,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-15 13:04:52,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2018-10-15 13:04:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-15 13:04:52,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 216 transitions. [2018-10-15 13:04:52,285 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 216 transitions. Word has length 192 [2018-10-15 13:04:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:52,286 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 216 transitions. [2018-10-15 13:04:52,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-15 13:04:52,286 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 216 transitions. [2018-10-15 13:04:52,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-15 13:04:52,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:52,287 INFO L375 BasicCegarLoop]: trace histogram [61, 50, 50, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:52,287 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:52,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:52,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1025517024, now seen corresponding path program 53 times [2018-10-15 13:04:52,288 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5056 backedges. 1437 proven. 282 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:04:52,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:52,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-15 13:04:52,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-15 13:04:52,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-15 13:04:52,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-15 13:04:52,539 INFO L87 Difference]: Start difference. First operand 205 states and 216 transitions. Second operand 17 states. [2018-10-15 13:04:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:52,622 INFO L93 Difference]: Finished difference Result 219 states and 234 transitions. [2018-10-15 13:04:52,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-15 13:04:52,622 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 204 [2018-10-15 13:04:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:52,624 INFO L225 Difference]: With dead ends: 219 [2018-10-15 13:04:52,625 INFO L226 Difference]: Without dead ends: 219 [2018-10-15 13:04:52,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-15 13:04:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-15 13:04:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2018-10-15 13:04:52,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-10-15 13:04:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 231 transitions. [2018-10-15 13:04:52,630 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 231 transitions. Word has length 204 [2018-10-15 13:04:52,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:52,630 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 231 transitions. [2018-10-15 13:04:52,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-15 13:04:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 231 transitions. [2018-10-15 13:04:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-15 13:04:52,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:52,632 INFO L375 BasicCegarLoop]: trace histogram [64, 50, 50, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:52,632 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:52,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:52,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2130892305, now seen corresponding path program 54 times [2018-10-15 13:04:52,633 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5503 backedges. 1725 proven. 441 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:04:53,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:53,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-15 13:04:53,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-15 13:04:53,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-15 13:04:53,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-15 13:04:53,007 INFO L87 Difference]: Start difference. First operand 217 states and 231 transitions. Second operand 20 states. [2018-10-15 13:04:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:53,158 INFO L93 Difference]: Finished difference Result 231 states and 249 transitions. [2018-10-15 13:04:53,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-15 13:04:53,159 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 216 [2018-10-15 13:04:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:53,161 INFO L225 Difference]: With dead ends: 231 [2018-10-15 13:04:53,161 INFO L226 Difference]: Without dead ends: 231 [2018-10-15 13:04:53,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-15 13:04:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-15 13:04:53,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2018-10-15 13:04:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-15 13:04:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 246 transitions. [2018-10-15 13:04:53,166 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 246 transitions. Word has length 216 [2018-10-15 13:04:53,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:53,166 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 246 transitions. [2018-10-15 13:04:53,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-15 13:04:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 246 transitions. [2018-10-15 13:04:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-15 13:04:53,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:53,167 INFO L375 BasicCegarLoop]: trace histogram [67, 50, 50, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:53,168 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:53,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:53,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1183726398, now seen corresponding path program 55 times [2018-10-15 13:04:53,169 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 2013 proven. 636 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:04:53,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:53,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-15 13:04:53,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-15 13:04:53,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-15 13:04:53,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-15 13:04:53,499 INFO L87 Difference]: Start difference. First operand 229 states and 246 transitions. Second operand 23 states. [2018-10-15 13:04:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:53,634 INFO L93 Difference]: Finished difference Result 243 states and 264 transitions. [2018-10-15 13:04:53,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-15 13:04:53,635 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 228 [2018-10-15 13:04:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:53,636 INFO L225 Difference]: With dead ends: 243 [2018-10-15 13:04:53,637 INFO L226 Difference]: Without dead ends: 243 [2018-10-15 13:04:53,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-15 13:04:53,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-15 13:04:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 241. [2018-10-15 13:04:53,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-10-15 13:04:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 261 transitions. [2018-10-15 13:04:53,641 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 261 transitions. Word has length 228 [2018-10-15 13:04:53,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:53,641 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 261 transitions. [2018-10-15 13:04:53,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-15 13:04:53,641 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 261 transitions. [2018-10-15 13:04:53,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-10-15 13:04:53,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:53,642 INFO L375 BasicCegarLoop]: trace histogram [70, 50, 50, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:53,643 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:53,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:53,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2005086707, now seen corresponding path program 56 times [2018-10-15 13:04:53,643 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6505 backedges. 2301 proven. 867 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:04:53,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:53,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-15 13:04:53,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-15 13:04:53,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-15 13:04:53,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-15 13:04:53,994 INFO L87 Difference]: Start difference. First operand 241 states and 261 transitions. Second operand 26 states. [2018-10-15 13:04:54,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:54,260 INFO L93 Difference]: Finished difference Result 255 states and 279 transitions. [2018-10-15 13:04:54,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-15 13:04:54,261 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 240 [2018-10-15 13:04:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:54,263 INFO L225 Difference]: With dead ends: 255 [2018-10-15 13:04:54,263 INFO L226 Difference]: Without dead ends: 255 [2018-10-15 13:04:54,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-15 13:04:54,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-15 13:04:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2018-10-15 13:04:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-10-15 13:04:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 276 transitions. [2018-10-15 13:04:54,268 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 276 transitions. Word has length 240 [2018-10-15 13:04:54,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:54,268 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 276 transitions. [2018-10-15 13:04:54,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-15 13:04:54,269 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 276 transitions. [2018-10-15 13:04:54,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-10-15 13:04:54,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:54,270 INFO L375 BasicCegarLoop]: trace histogram [73, 50, 50, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:54,270 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:54,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:54,271 INFO L82 PathProgramCache]: Analyzing trace with hash -351100324, now seen corresponding path program 57 times [2018-10-15 13:04:54,271 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7060 backedges. 2589 proven. 1134 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:04:54,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:54,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-15 13:04:54,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-15 13:04:54,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-15 13:04:54,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-15 13:04:54,852 INFO L87 Difference]: Start difference. First operand 253 states and 276 transitions. Second operand 29 states. [2018-10-15 13:04:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:55,188 INFO L93 Difference]: Finished difference Result 267 states and 294 transitions. [2018-10-15 13:04:55,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-15 13:04:55,188 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 252 [2018-10-15 13:04:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:55,191 INFO L225 Difference]: With dead ends: 267 [2018-10-15 13:04:55,192 INFO L226 Difference]: Without dead ends: 267 [2018-10-15 13:04:55,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-15 13:04:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-15 13:04:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2018-10-15 13:04:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-10-15 13:04:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 291 transitions. [2018-10-15 13:04:55,198 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 291 transitions. Word has length 252 [2018-10-15 13:04:55,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:55,198 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 291 transitions. [2018-10-15 13:04:55,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-15 13:04:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 291 transitions. [2018-10-15 13:04:55,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-10-15 13:04:55,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:55,200 INFO L375 BasicCegarLoop]: trace histogram [76, 50, 50, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:55,200 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:55,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:55,200 INFO L82 PathProgramCache]: Analyzing trace with hash 838432811, now seen corresponding path program 58 times [2018-10-15 13:04:55,202 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7651 backedges. 2877 proven. 1437 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:04:55,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:55,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-15 13:04:55,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-15 13:04:55,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-15 13:04:55,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-15 13:04:55,684 INFO L87 Difference]: Start difference. First operand 265 states and 291 transitions. Second operand 32 states. [2018-10-15 13:04:55,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:55,902 INFO L93 Difference]: Finished difference Result 279 states and 309 transitions. [2018-10-15 13:04:55,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-15 13:04:55,903 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 264 [2018-10-15 13:04:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:55,905 INFO L225 Difference]: With dead ends: 279 [2018-10-15 13:04:55,905 INFO L226 Difference]: Without dead ends: 279 [2018-10-15 13:04:55,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-15 13:04:55,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-15 13:04:55,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 277. [2018-10-15 13:04:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-10-15 13:04:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 306 transitions. [2018-10-15 13:04:55,910 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 306 transitions. Word has length 264 [2018-10-15 13:04:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:55,910 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 306 transitions. [2018-10-15 13:04:55,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-15 13:04:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 306 transitions. [2018-10-15 13:04:55,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-10-15 13:04:55,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:55,912 INFO L375 BasicCegarLoop]: trace histogram [79, 50, 50, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:55,912 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:55,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:55,913 INFO L82 PathProgramCache]: Analyzing trace with hash 809176954, now seen corresponding path program 59 times [2018-10-15 13:04:55,913 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8278 backedges. 3165 proven. 1776 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:04:56,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:56,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-15 13:04:56,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-15 13:04:56,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-15 13:04:56,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-15 13:04:56,499 INFO L87 Difference]: Start difference. First operand 277 states and 306 transitions. Second operand 35 states. [2018-10-15 13:04:56,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:56,742 INFO L93 Difference]: Finished difference Result 291 states and 324 transitions. [2018-10-15 13:04:56,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-15 13:04:56,750 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 276 [2018-10-15 13:04:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:56,752 INFO L225 Difference]: With dead ends: 291 [2018-10-15 13:04:56,752 INFO L226 Difference]: Without dead ends: 291 [2018-10-15 13:04:56,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-15 13:04:56,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-15 13:04:56,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2018-10-15 13:04:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-10-15 13:04:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 321 transitions. [2018-10-15 13:04:56,756 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 321 transitions. Word has length 276 [2018-10-15 13:04:56,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:56,757 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 321 transitions. [2018-10-15 13:04:56,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-15 13:04:56,757 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 321 transitions. [2018-10-15 13:04:56,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-10-15 13:04:56,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:56,759 INFO L375 BasicCegarLoop]: trace histogram [82, 50, 50, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:56,759 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:56,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:56,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1203689399, now seen corresponding path program 60 times [2018-10-15 13:04:56,760 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8941 backedges. 3453 proven. 2151 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:04:57,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:57,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-15 13:04:57,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-15 13:04:57,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-15 13:04:57,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-15 13:04:57,422 INFO L87 Difference]: Start difference. First operand 289 states and 321 transitions. Second operand 38 states. [2018-10-15 13:04:57,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:57,748 INFO L93 Difference]: Finished difference Result 303 states and 339 transitions. [2018-10-15 13:04:57,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-15 13:04:57,749 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 288 [2018-10-15 13:04:57,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:57,750 INFO L225 Difference]: With dead ends: 303 [2018-10-15 13:04:57,750 INFO L226 Difference]: Without dead ends: 303 [2018-10-15 13:04:57,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-15 13:04:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-15 13:04:57,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2018-10-15 13:04:57,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-10-15 13:04:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 336 transitions. [2018-10-15 13:04:57,755 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 336 transitions. Word has length 288 [2018-10-15 13:04:57,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:57,756 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 336 transitions. [2018-10-15 13:04:57,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-15 13:04:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 336 transitions. [2018-10-15 13:04:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-10-15 13:04:57,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:57,758 INFO L375 BasicCegarLoop]: trace histogram [85, 50, 50, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:57,758 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:57,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:57,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1948941672, now seen corresponding path program 61 times [2018-10-15 13:04:57,759 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:04:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 3741 proven. 2562 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:04:58,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:04:58,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-15 13:04:58,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-15 13:04:58,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-15 13:04:58,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-15 13:04:58,752 INFO L87 Difference]: Start difference. First operand 301 states and 336 transitions. Second operand 41 states. [2018-10-15 13:04:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:04:59,068 INFO L93 Difference]: Finished difference Result 315 states and 354 transitions. [2018-10-15 13:04:59,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-15 13:04:59,068 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 300 [2018-10-15 13:04:59,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:04:59,071 INFO L225 Difference]: With dead ends: 315 [2018-10-15 13:04:59,071 INFO L226 Difference]: Without dead ends: 315 [2018-10-15 13:04:59,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-15 13:04:59,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-15 13:04:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 313. [2018-10-15 13:04:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-10-15 13:04:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 351 transitions. [2018-10-15 13:04:59,077 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 351 transitions. Word has length 300 [2018-10-15 13:04:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:04:59,077 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 351 transitions. [2018-10-15 13:04:59,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-15 13:04:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 351 transitions. [2018-10-15 13:04:59,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-10-15 13:04:59,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:04:59,079 INFO L375 BasicCegarLoop]: trace histogram [88, 50, 50, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:04:59,080 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:04:59,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:04:59,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1277288039, now seen corresponding path program 62 times [2018-10-15 13:04:59,081 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:04:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:05:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 4029 proven. 3009 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:05:00,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:05:00,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-15 13:05:00,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-15 13:05:00,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-15 13:05:00,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-15 13:05:00,662 INFO L87 Difference]: Start difference. First operand 313 states and 351 transitions. Second operand 44 states. [2018-10-15 13:05:00,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:05:00,982 INFO L93 Difference]: Finished difference Result 327 states and 369 transitions. [2018-10-15 13:05:00,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-15 13:05:00,982 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 312 [2018-10-15 13:05:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:05:00,983 INFO L225 Difference]: With dead ends: 327 [2018-10-15 13:05:00,984 INFO L226 Difference]: Without dead ends: 327 [2018-10-15 13:05:00,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-15 13:05:00,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-15 13:05:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 325. [2018-10-15 13:05:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-10-15 13:05:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 366 transitions. [2018-10-15 13:05:00,988 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 366 transitions. Word has length 312 [2018-10-15 13:05:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:05:00,988 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 366 transitions. [2018-10-15 13:05:00,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-15 13:05:00,988 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 366 transitions. [2018-10-15 13:05:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-10-15 13:05:00,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:05:00,990 INFO L375 BasicCegarLoop]: trace histogram [91, 50, 50, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:05:00,990 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:05:00,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:05:00,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1773140918, now seen corresponding path program 63 times [2018-10-15 13:05:00,991 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:05:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:05:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11146 backedges. 4317 proven. 3492 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:05:02,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:05:02,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-15 13:05:02,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-15 13:05:02,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-15 13:05:02,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-15 13:05:02,014 INFO L87 Difference]: Start difference. First operand 325 states and 366 transitions. Second operand 47 states. [2018-10-15 13:05:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:05:02,388 INFO L93 Difference]: Finished difference Result 339 states and 384 transitions. [2018-10-15 13:05:02,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-15 13:05:02,388 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 324 [2018-10-15 13:05:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:05:02,389 INFO L225 Difference]: With dead ends: 339 [2018-10-15 13:05:02,389 INFO L226 Difference]: Without dead ends: 339 [2018-10-15 13:05:02,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-15 13:05:02,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-15 13:05:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2018-10-15 13:05:02,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2018-10-15 13:05:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 381 transitions. [2018-10-15 13:05:02,394 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 381 transitions. Word has length 324 [2018-10-15 13:05:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:05:02,395 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 381 transitions. [2018-10-15 13:05:02,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-15 13:05:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 381 transitions. [2018-10-15 13:05:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-10-15 13:05:02,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:05:02,396 INFO L375 BasicCegarLoop]: trace histogram [94, 50, 50, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:05:02,396 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:05:02,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:05:02,397 INFO L82 PathProgramCache]: Analyzing trace with hash 342465157, now seen corresponding path program 64 times [2018-10-15 13:05:02,397 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:05:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:05:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11953 backedges. 4605 proven. 4011 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:05:03,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:05:03,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-15 13:05:03,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-15 13:05:03,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-15 13:05:03,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-15 13:05:03,452 INFO L87 Difference]: Start difference. First operand 337 states and 381 transitions. Second operand 50 states. [2018-10-15 13:05:03,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:05:03,842 INFO L93 Difference]: Finished difference Result 351 states and 399 transitions. [2018-10-15 13:05:03,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-15 13:05:03,842 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 336 [2018-10-15 13:05:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:05:03,844 INFO L225 Difference]: With dead ends: 351 [2018-10-15 13:05:03,844 INFO L226 Difference]: Without dead ends: 351 [2018-10-15 13:05:03,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-15 13:05:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-10-15 13:05:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 349. [2018-10-15 13:05:03,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-10-15 13:05:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 396 transitions. [2018-10-15 13:05:03,849 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 396 transitions. Word has length 336 [2018-10-15 13:05:03,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:05:03,849 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 396 transitions. [2018-10-15 13:05:03,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-15 13:05:03,849 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 396 transitions. [2018-10-15 13:05:03,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-10-15 13:05:03,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:05:03,851 INFO L375 BasicCegarLoop]: trace histogram [97, 50, 50, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:05:03,852 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:05:03,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:05:03,852 INFO L82 PathProgramCache]: Analyzing trace with hash 731413204, now seen corresponding path program 65 times [2018-10-15 13:05:03,853 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:05:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:05:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12796 backedges. 4893 proven. 4566 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2018-10-15 13:05:04,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:05:04,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-15 13:05:04,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-15 13:05:04,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-15 13:05:04,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-15 13:05:04,999 INFO L87 Difference]: Start difference. First operand 349 states and 396 transitions. Second operand 53 states. [2018-10-15 13:05:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:05:05,570 INFO L93 Difference]: Finished difference Result 361 states and 411 transitions. [2018-10-15 13:05:05,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-15 13:05:05,577 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 348 [2018-10-15 13:05:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:05:05,579 INFO L225 Difference]: With dead ends: 361 [2018-10-15 13:05:05,579 INFO L226 Difference]: Without dead ends: 361 [2018-10-15 13:05:05,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-15 13:05:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2018-10-15 13:05:05,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2018-10-15 13:05:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-10-15 13:05:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 411 transitions. [2018-10-15 13:05:05,584 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 411 transitions. Word has length 348 [2018-10-15 13:05:05,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:05:05,584 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 411 transitions. [2018-10-15 13:05:05,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-15 13:05:05,584 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 411 transitions. [2018-10-15 13:05:05,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-10-15 13:05:05,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:05:05,587 INFO L375 BasicCegarLoop]: trace histogram [100, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:05:05,587 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:05:05,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:05:05,587 INFO L82 PathProgramCache]: Analyzing trace with hash 770071715, now seen corresponding path program 66 times [2018-10-15 13:05:05,588 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:05:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:05:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13675 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2018-10-15 13:05:08,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-15 13:05:08,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-15 13:05:08,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-15 13:05:08,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-15 13:05:08,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-15 13:05:08,162 INFO L87 Difference]: Start difference. First operand 361 states and 411 transitions. Second operand 55 states. [2018-10-15 13:05:10,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:05:10,402 INFO L93 Difference]: Finished difference Result 5717 states and 7092 transitions. [2018-10-15 13:05:10,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-15 13:05:10,402 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 360 [2018-10-15 13:05:10,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:05:10,420 INFO L225 Difference]: With dead ends: 5717 [2018-10-15 13:05:10,420 INFO L226 Difference]: Without dead ends: 5713 [2018-10-15 13:05:10,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=117, Invalid=3075, Unknown=0, NotChecked=0, Total=3192 [2018-10-15 13:05:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2018-10-15 13:05:10,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 366. [2018-10-15 13:05:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2018-10-15 13:05:10,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 417 transitions. [2018-10-15 13:05:10,482 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 417 transitions. Word has length 360 [2018-10-15 13:05:10,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:05:10,482 INFO L481 AbstractCegarLoop]: Abstraction has 366 states and 417 transitions. [2018-10-15 13:05:10,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-15 13:05:10,483 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 417 transitions. [2018-10-15 13:05:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2018-10-15 13:05:10,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-15 13:05:10,485 INFO L375 BasicCegarLoop]: trace histogram [101, 51, 51, 51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-15 13:05:10,485 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-15 13:05:10,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-15 13:05:10,485 INFO L82 PathProgramCache]: Analyzing trace with hash -196160792, now seen corresponding path program 67 times [2018-10-15 13:05:10,486 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-15 13:05:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-15 13:05:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13976 backedges. 10201 proven. 0 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2018-10-15 13:05:12,354 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-15 13:05:12,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2018-10-15 13:05:12,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-15 13:05:12,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-15 13:05:12,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-15 13:05:12,356 INFO L87 Difference]: Start difference. First operand 366 states and 417 transitions. Second operand 53 states. [2018-10-15 13:05:12,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-15 13:05:12,670 INFO L93 Difference]: Finished difference Result 355 states and 355 transitions. [2018-10-15 13:05:12,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-15 13:05:12,671 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 364 [2018-10-15 13:05:12,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-15 13:05:12,671 INFO L225 Difference]: With dead ends: 355 [2018-10-15 13:05:12,672 INFO L226 Difference]: Without dead ends: 0 [2018-10-15 13:05:12,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-15 13:05:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-15 13:05:12,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-15 13:05:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-15 13:05:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-15 13:05:12,673 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 364 [2018-10-15 13:05:12,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-15 13:05:12,673 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-15 13:05:12,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-15 13:05:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-15 13:05:12,674 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-15 13:05:12,678 INFO L202 PluginConnector]: Adding new model gj2007_true-unreach-call_true-termination.c.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:05:12 BasicIcfg [2018-10-15 13:05:12,679 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-15 13:05:12,680 INFO L168 Benchmark]: Toolchain (without parser) took 70180.83 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 558.9 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -93.1 MB). Peak memory consumption was 465.8 MB. Max. memory is 7.1 GB. [2018-10-15 13:05:12,681 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-15 13:05:12,682 INFO L168 Benchmark]: Boogie Preprocessor took 54.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-15 13:05:12,682 INFO L168 Benchmark]: RCFGBuilder took 330.91 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-15 13:05:12,683 INFO L168 Benchmark]: IcfgTransformer took 26.47 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-15 13:05:12,683 INFO L168 Benchmark]: TraceAbstraction took 69763.25 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 558.9 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -114.2 MB). Peak memory consumption was 444.7 MB. Max. memory is 7.1 GB. [2018-10-15 13:05:12,686 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 330.91 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * IcfgTransformer took 26.47 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * TraceAbstraction took 69763.25 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 558.9 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -114.2 MB). Peak memory consumption was 444.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. SAFE Result, 69.6s OverallTime, 70 OverallIterations, 101 TraceHistogramMax, 19.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1169 SDtfs, 2629 SDslu, 22995 SDs, 0 SdLazy, 13292 SolverSat, 730 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1982 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 1842 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=366occurred in iteration=69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 70 MinimizatonAttempts, 5430 StatesRemovedByMinimization, 67 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 46.9s InterpolantComputationTime, 9399 NumberOfCodeBlocks, 9399 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 9329 ConstructedInterpolants, 0 QuantifiedInterpolants, 4586365 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 70 InterpolantComputations, 3 PerfectInterpolantSequences, 119973/217739 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gj2007_true-unreach-call_true-termination.c.i_4.bpl_heapsep-2018-09-18.epf_AutomizerBplTransformed.xml/Csv-Benchmark-0-2018-10-15_13-05-12-696.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gj2007_true-unreach-call_true-termination.c.i_4.bpl_heapsep-2018-09-18.epf_AutomizerBplTransformed.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-15_13-05-12-696.csv Received shutdown request...