java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/20051113-1.c_false-valid-memtrack.i_11.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-093a8c0 [2018-10-14 16:18:12,451 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-14 16:18:12,455 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-14 16:18:12,473 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-14 16:18:12,473 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-14 16:18:12,475 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-14 16:18:12,477 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-14 16:18:12,479 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-14 16:18:12,482 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-14 16:18:12,484 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-14 16:18:12,485 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-14 16:18:12,486 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-14 16:18:12,487 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-14 16:18:12,488 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-14 16:18:12,491 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-14 16:18:12,500 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-14 16:18:12,501 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-14 16:18:12,504 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-14 16:18:12,506 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-14 16:18:12,511 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-14 16:18:12,512 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-14 16:18:12,514 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-14 16:18:12,516 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-14 16:18:12,516 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-14 16:18:12,516 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-14 16:18:12,517 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-14 16:18:12,518 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-14 16:18:12,519 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-14 16:18:12,519 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-14 16:18:12,520 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-14 16:18:12,521 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-14 16:18:12,521 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-14 16:18:12,524 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-14 16:18:12,533 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-14 16:18:12,533 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-14 16:18:12,534 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-14 16:18:12,535 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-14 16:18:12,535 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-14 16:18:12,535 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-14 16:18:12,536 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-14 16:18:12,536 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-14 16:18:12,536 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-14 16:18:12,536 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-14 16:18:12,536 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-14 16:18:12,537 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-14 16:18:12,537 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-14 16:18:12,538 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-14 16:18:12,538 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-14 16:18:12,582 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-14 16:18:12,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-14 16:18:12,603 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-14 16:18:12,605 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-14 16:18:12,605 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-14 16:18:12,606 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/20051113-1.c_false-valid-memtrack.i_11.bpl [2018-10-14 16:18:12,606 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/20051113-1.c_false-valid-memtrack.i_11.bpl' [2018-10-14 16:18:12,668 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-14 16:18:12,670 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-14 16:18:12,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-14 16:18:12,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-14 16:18:12,671 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-14 16:18:12,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "20051113-1.c_false-valid-memtrack.i_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:18:12" (1/1) ... [2018-10-14 16:18:12,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "20051113-1.c_false-valid-memtrack.i_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:18:12" (1/1) ... [2018-10-14 16:18:12,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "20051113-1.c_false-valid-memtrack.i_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:18:12" (1/1) ... [2018-10-14 16:18:12,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "20051113-1.c_false-valid-memtrack.i_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:18:12" (1/1) ... [2018-10-14 16:18:12,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "20051113-1.c_false-valid-memtrack.i_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:18:12" (1/1) ... [2018-10-14 16:18:12,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "20051113-1.c_false-valid-memtrack.i_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:18:12" (1/1) ... [2018-10-14 16:18:12,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "20051113-1.c_false-valid-memtrack.i_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:18:12" (1/1) ... [2018-10-14 16:18:12,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-14 16:18:12,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-14 16:18:12,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-14 16:18:12,726 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-14 16:18:12,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "20051113-1.c_false-valid-memtrack.i_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:18:12" (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 [2018-10-14 16:18:12,799 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-14 16:18:12,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-14 16:18:12,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-14 16:18:13,339 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-14 16:18:13,340 INFO L202 PluginConnector]: Adding new model 20051113-1.c_false-valid-memtrack.i_11.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:18:13 BoogieIcfgContainer [2018-10-14 16:18:13,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-14 16:18:13,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-14 16:18:13,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-14 16:18:13,345 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-14 16:18:13,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "20051113-1.c_false-valid-memtrack.i_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:18:12" (1/2) ... [2018-10-14 16:18:13,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d01c833 and model type 20051113-1.c_false-valid-memtrack.i_11.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:18:13, skipping insertion in model container [2018-10-14 16:18:13,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "20051113-1.c_false-valid-memtrack.i_11.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:18:13" (2/2) ... [2018-10-14 16:18:13,349 INFO L112 eAbstractionObserver]: Analyzing ICFG 20051113-1.c_false-valid-memtrack.i_11.bpl [2018-10-14 16:18:13,359 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-14 16:18:13,369 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-14 16:18:13,387 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-14 16:18:13,417 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-14 16:18:13,418 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-14 16:18:13,418 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-14 16:18:13,418 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-14 16:18:13,418 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-14 16:18:13,419 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-14 16:18:13,419 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-14 16:18:13,419 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-14 16:18:13,419 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-14 16:18:13,440 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-10-14 16:18:13,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-14 16:18:13,451 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:13,453 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:13,454 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:13,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:13,461 INFO L82 PathProgramCache]: Analyzing trace with hash 411051203, now seen corresponding path program 1 times [2018-10-14 16:18:13,529 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:13,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:18:13,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-14 16:18:13,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-14 16:18:13,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-14 16:18:13,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-14 16:18:13,855 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 4 states. [2018-10-14 16:18:13,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:13,990 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-14 16:18:13,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-14 16:18:13,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-10-14 16:18:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:14,006 INFO L225 Difference]: With dead ends: 63 [2018-10-14 16:18:14,006 INFO L226 Difference]: Without dead ends: 63 [2018-10-14 16:18:14,008 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 [2018-10-14 16:18:14,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-14 16:18:14,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2018-10-14 16:18:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-14 16:18:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-14 16:18:14,051 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 57 [2018-10-14 16:18:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:14,051 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-14 16:18:14,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-14 16:18:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-14 16:18:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-14 16:18:14,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:14,054 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:14,054 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:14,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1912104607, now seen corresponding path program 1 times [2018-10-14 16:18:14,056 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:14,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:14,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-14 16:18:14,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-14 16:18:14,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-14 16:18:14,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-14 16:18:14,258 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 5 states. [2018-10-14 16:18:14,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:14,509 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-14 16:18:14,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-14 16:18:14,511 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2018-10-14 16:18:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:14,512 INFO L225 Difference]: With dead ends: 66 [2018-10-14 16:18:14,513 INFO L226 Difference]: Without dead ends: 66 [2018-10-14 16:18:14,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-14 16:18:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-14 16:18:14,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2018-10-14 16:18:14,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-14 16:18:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-14 16:18:14,522 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 60 [2018-10-14 16:18:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:14,523 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-14 16:18:14,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-14 16:18:14,523 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-14 16:18:14,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-14 16:18:14,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:14,525 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:14,526 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:14,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:14,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1943832573, now seen corresponding path program 2 times [2018-10-14 16:18:14,528 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:14,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:14,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-14 16:18:14,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-14 16:18:14,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-14 16:18:14,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-14 16:18:14,696 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 6 states. [2018-10-14 16:18:14,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:14,925 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-14 16:18:14,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-14 16:18:14,929 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2018-10-14 16:18:14,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:14,933 INFO L225 Difference]: With dead ends: 69 [2018-10-14 16:18:14,933 INFO L226 Difference]: Without dead ends: 69 [2018-10-14 16:18:14,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-14 16:18:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-14 16:18:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2018-10-14 16:18:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-14 16:18:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-14 16:18:14,944 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 63 [2018-10-14 16:18:14,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:14,945 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-14 16:18:14,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-14 16:18:14,945 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-14 16:18:14,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-14 16:18:14,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:14,948 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:14,949 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:14,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2036104737, now seen corresponding path program 3 times [2018-10-14 16:18:14,950 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:15,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:15,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-14 16:18:15,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-14 16:18:15,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-14 16:18:15,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-14 16:18:15,101 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 7 states. [2018-10-14 16:18:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:15,226 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-14 16:18:15,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-14 16:18:15,227 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2018-10-14 16:18:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:15,228 INFO L225 Difference]: With dead ends: 72 [2018-10-14 16:18:15,228 INFO L226 Difference]: Without dead ends: 72 [2018-10-14 16:18:15,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-14 16:18:15,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-14 16:18:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2018-10-14 16:18:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-14 16:18:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-14 16:18:15,236 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 66 [2018-10-14 16:18:15,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:15,237 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-14 16:18:15,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-14 16:18:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-14 16:18:15,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-14 16:18:15,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:15,239 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:15,239 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:15,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:15,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1481333571, now seen corresponding path program 4 times [2018-10-14 16:18:15,240 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:15,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:15,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-14 16:18:15,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-14 16:18:15,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-14 16:18:15,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-10-14 16:18:15,543 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 8 states. [2018-10-14 16:18:15,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:15,889 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-14 16:18:15,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-14 16:18:15,890 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2018-10-14 16:18:15,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:15,891 INFO L225 Difference]: With dead ends: 75 [2018-10-14 16:18:15,895 INFO L226 Difference]: Without dead ends: 75 [2018-10-14 16:18:15,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-14 16:18:15,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-14 16:18:15,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2018-10-14 16:18:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-14 16:18:15,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-14 16:18:15,903 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 69 [2018-10-14 16:18:15,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:15,904 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-14 16:18:15,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-14 16:18:15,904 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-14 16:18:15,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-14 16:18:15,905 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:15,906 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:15,906 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:15,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:15,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1327682273, now seen corresponding path program 5 times [2018-10-14 16:18:15,907 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:16,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:16,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-14 16:18:16,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-14 16:18:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-14 16:18:16,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-10-14 16:18:16,083 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 9 states. [2018-10-14 16:18:16,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:16,297 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-14 16:18:16,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-14 16:18:16,300 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2018-10-14 16:18:16,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:16,301 INFO L225 Difference]: With dead ends: 78 [2018-10-14 16:18:16,301 INFO L226 Difference]: Without dead ends: 78 [2018-10-14 16:18:16,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-14 16:18:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-14 16:18:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2018-10-14 16:18:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-14 16:18:16,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-14 16:18:16,319 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 72 [2018-10-14 16:18:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:16,320 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-14 16:18:16,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-14 16:18:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-14 16:18:16,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-14 16:18:16,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:16,323 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:16,323 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:16,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:16,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1957966205, now seen corresponding path program 6 times [2018-10-14 16:18:16,324 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:16,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:16,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-14 16:18:16,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-14 16:18:16,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-14 16:18:16,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-14 16:18:16,717 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 10 states. [2018-10-14 16:18:16,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:16,930 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-14 16:18:16,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-14 16:18:16,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2018-10-14 16:18:16,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:16,933 INFO L225 Difference]: With dead ends: 81 [2018-10-14 16:18:16,933 INFO L226 Difference]: Without dead ends: 81 [2018-10-14 16:18:16,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-14 16:18:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-14 16:18:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2018-10-14 16:18:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-14 16:18:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-14 16:18:16,939 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 75 [2018-10-14 16:18:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:16,940 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-14 16:18:16,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-14 16:18:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-14 16:18:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-14 16:18:16,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:16,942 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:16,942 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:16,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:16,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1887868833, now seen corresponding path program 7 times [2018-10-14 16:18:16,944 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:17,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:17,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-14 16:18:17,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-14 16:18:17,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-14 16:18:17,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2018-10-14 16:18:17,102 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 11 states. [2018-10-14 16:18:17,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:17,317 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-14 16:18:17,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-14 16:18:17,324 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2018-10-14 16:18:17,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:17,325 INFO L225 Difference]: With dead ends: 84 [2018-10-14 16:18:17,325 INFO L226 Difference]: Without dead ends: 84 [2018-10-14 16:18:17,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-14 16:18:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-14 16:18:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2018-10-14 16:18:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-14 16:18:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-14 16:18:17,333 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 78 [2018-10-14 16:18:17,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:17,333 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-14 16:18:17,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-14 16:18:17,334 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-14 16:18:17,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-14 16:18:17,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:17,335 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:17,335 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:17,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:17,336 INFO L82 PathProgramCache]: Analyzing trace with hash 611897795, now seen corresponding path program 8 times [2018-10-14 16:18:17,336 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:17,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:17,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-14 16:18:17,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-14 16:18:17,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-14 16:18:17,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2018-10-14 16:18:17,643 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 12 states. [2018-10-14 16:18:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:17,909 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-14 16:18:17,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-14 16:18:17,912 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2018-10-14 16:18:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:17,913 INFO L225 Difference]: With dead ends: 87 [2018-10-14 16:18:17,913 INFO L226 Difference]: Without dead ends: 87 [2018-10-14 16:18:17,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-14 16:18:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-14 16:18:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2018-10-14 16:18:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-14 16:18:17,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-14 16:18:17,928 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 81 [2018-10-14 16:18:17,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:17,932 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-14 16:18:17,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-14 16:18:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-14 16:18:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-14 16:18:17,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:17,934 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:17,934 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:17,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:17,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1380725663, now seen corresponding path program 9 times [2018-10-14 16:18:17,939 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:18,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:18,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-14 16:18:18,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-14 16:18:18,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-14 16:18:18,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2018-10-14 16:18:18,326 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 13 states. [2018-10-14 16:18:18,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:18,536 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-14 16:18:18,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-14 16:18:18,540 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2018-10-14 16:18:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:18,541 INFO L225 Difference]: With dead ends: 90 [2018-10-14 16:18:18,542 INFO L226 Difference]: Without dead ends: 90 [2018-10-14 16:18:18,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-14 16:18:18,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-14 16:18:18,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2018-10-14 16:18:18,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-14 16:18:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-14 16:18:18,551 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 84 [2018-10-14 16:18:18,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:18,552 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-14 16:18:18,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-14 16:18:18,553 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-14 16:18:18,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-14 16:18:18,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:18,554 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:18,555 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:18,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:18,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1411802371, now seen corresponding path program 10 times [2018-10-14 16:18:18,562 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:18,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:18,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-14 16:18:18,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-14 16:18:18,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-14 16:18:18,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2018-10-14 16:18:18,995 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 14 states. [2018-10-14 16:18:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:19,326 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-14 16:18:19,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-14 16:18:19,330 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 87 [2018-10-14 16:18:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:19,331 INFO L225 Difference]: With dead ends: 93 [2018-10-14 16:18:19,331 INFO L226 Difference]: Without dead ends: 93 [2018-10-14 16:18:19,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-14 16:18:19,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-14 16:18:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2018-10-14 16:18:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-14 16:18:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-14 16:18:19,336 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 87 [2018-10-14 16:18:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:19,336 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-14 16:18:19,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-14 16:18:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-14 16:18:19,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-14 16:18:19,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:19,338 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:19,339 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:19,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:19,339 INFO L82 PathProgramCache]: Analyzing trace with hash 97939745, now seen corresponding path program 11 times [2018-10-14 16:18:19,340 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:19,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:19,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-14 16:18:19,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-14 16:18:19,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-14 16:18:19,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2018-10-14 16:18:19,699 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 15 states. [2018-10-14 16:18:20,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:20,099 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-14 16:18:20,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-14 16:18:20,100 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 90 [2018-10-14 16:18:20,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:20,102 INFO L225 Difference]: With dead ends: 96 [2018-10-14 16:18:20,102 INFO L226 Difference]: Without dead ends: 96 [2018-10-14 16:18:20,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-14 16:18:20,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-14 16:18:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2018-10-14 16:18:20,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-14 16:18:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-14 16:18:20,106 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 90 [2018-10-14 16:18:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:20,109 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-14 16:18:20,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-14 16:18:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-14 16:18:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-14 16:18:20,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:20,110 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:20,110 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:20,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:20,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1146582973, now seen corresponding path program 12 times [2018-10-14 16:18:20,112 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:20,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:20,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-14 16:18:20,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-14 16:18:20,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-14 16:18:20,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2018-10-14 16:18:20,830 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 16 states. [2018-10-14 16:18:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:21,106 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-14 16:18:21,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-14 16:18:21,108 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 93 [2018-10-14 16:18:21,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:21,109 INFO L225 Difference]: With dead ends: 99 [2018-10-14 16:18:21,109 INFO L226 Difference]: Without dead ends: 99 [2018-10-14 16:18:21,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-14 16:18:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-14 16:18:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2018-10-14 16:18:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-14 16:18:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-14 16:18:21,113 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 93 [2018-10-14 16:18:21,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:21,114 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-14 16:18:21,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-14 16:18:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-14 16:18:21,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-14 16:18:21,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:21,115 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:21,115 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:21,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:21,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1729791457, now seen corresponding path program 13 times [2018-10-14 16:18:21,117 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:21,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:21,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-14 16:18:21,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-14 16:18:21,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-14 16:18:21,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2018-10-14 16:18:21,331 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 17 states. [2018-10-14 16:18:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:21,805 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-14 16:18:21,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-14 16:18:21,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2018-10-14 16:18:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:21,807 INFO L225 Difference]: With dead ends: 102 [2018-10-14 16:18:21,807 INFO L226 Difference]: Without dead ends: 102 [2018-10-14 16:18:21,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-14 16:18:21,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-14 16:18:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2018-10-14 16:18:21,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-14 16:18:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-14 16:18:21,811 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 96 [2018-10-14 16:18:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:21,812 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-14 16:18:21,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-14 16:18:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-14 16:18:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-14 16:18:21,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:21,813 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:21,813 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:21,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:21,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1387054205, now seen corresponding path program 14 times [2018-10-14 16:18:21,814 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:22,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:22,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-14 16:18:22,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-14 16:18:22,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-14 16:18:22,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2018-10-14 16:18:22,584 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 18 states. [2018-10-14 16:18:22,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:22,944 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-14 16:18:22,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-14 16:18:22,944 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 99 [2018-10-14 16:18:22,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:22,946 INFO L225 Difference]: With dead ends: 105 [2018-10-14 16:18:22,946 INFO L226 Difference]: Without dead ends: 105 [2018-10-14 16:18:22,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-14 16:18:22,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-14 16:18:22,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2018-10-14 16:18:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-14 16:18:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-14 16:18:22,950 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 99 [2018-10-14 16:18:22,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:22,950 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-14 16:18:22,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-14 16:18:22,951 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-14 16:18:22,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-14 16:18:22,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:22,951 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:22,952 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:22,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:22,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1856768673, now seen corresponding path program 15 times [2018-10-14 16:18:22,953 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:23,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:23,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-14 16:18:23,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-14 16:18:23,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-14 16:18:23,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2018-10-14 16:18:23,224 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 19 states. [2018-10-14 16:18:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:23,557 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-14 16:18:23,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-14 16:18:23,558 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 102 [2018-10-14 16:18:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:23,559 INFO L225 Difference]: With dead ends: 108 [2018-10-14 16:18:23,559 INFO L226 Difference]: Without dead ends: 108 [2018-10-14 16:18:23,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-14 16:18:23,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-14 16:18:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2018-10-14 16:18:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-14 16:18:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-14 16:18:23,562 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 102 [2018-10-14 16:18:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:23,562 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-14 16:18:23,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-14 16:18:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-14 16:18:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-14 16:18:23,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:23,564 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:23,564 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:23,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:23,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1819967171, now seen corresponding path program 16 times [2018-10-14 16:18:23,565 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:24,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:24,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-14 16:18:24,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-14 16:18:24,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-14 16:18:24,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2018-10-14 16:18:24,351 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 20 states. [2018-10-14 16:18:24,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:24,740 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-14 16:18:24,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-14 16:18:24,741 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2018-10-14 16:18:24,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:24,742 INFO L225 Difference]: With dead ends: 111 [2018-10-14 16:18:24,743 INFO L226 Difference]: Without dead ends: 111 [2018-10-14 16:18:24,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-14 16:18:24,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-14 16:18:24,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2018-10-14 16:18:24,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-14 16:18:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-14 16:18:24,746 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 105 [2018-10-14 16:18:24,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:24,747 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-14 16:18:24,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-14 16:18:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-14 16:18:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-14 16:18:24,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:24,750 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:24,750 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:24,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:24,750 INFO L82 PathProgramCache]: Analyzing trace with hash 683081569, now seen corresponding path program 17 times [2018-10-14 16:18:24,753 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:25,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:25,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-14 16:18:25,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-14 16:18:25,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-14 16:18:25,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2018-10-14 16:18:25,500 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 21 states. [2018-10-14 16:18:26,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:26,035 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-14 16:18:26,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-14 16:18:26,035 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 108 [2018-10-14 16:18:26,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:26,036 INFO L225 Difference]: With dead ends: 114 [2018-10-14 16:18:26,036 INFO L226 Difference]: Without dead ends: 114 [2018-10-14 16:18:26,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-14 16:18:26,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-14 16:18:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2018-10-14 16:18:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-14 16:18:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-14 16:18:26,040 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 108 [2018-10-14 16:18:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:26,040 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-14 16:18:26,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-14 16:18:26,040 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-14 16:18:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-14 16:18:26,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:26,041 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:26,041 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:26,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:26,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1836208643, now seen corresponding path program 18 times [2018-10-14 16:18:26,043 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:26,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:26,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-14 16:18:26,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-14 16:18:26,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-14 16:18:26,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2018-10-14 16:18:26,398 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 22 states. [2018-10-14 16:18:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:26,952 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-14 16:18:26,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-14 16:18:26,952 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2018-10-14 16:18:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:26,953 INFO L225 Difference]: With dead ends: 117 [2018-10-14 16:18:26,953 INFO L226 Difference]: Without dead ends: 117 [2018-10-14 16:18:26,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-14 16:18:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-14 16:18:26,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-10-14 16:18:26,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-14 16:18:26,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-14 16:18:26,956 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 111 [2018-10-14 16:18:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:26,957 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-14 16:18:26,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-14 16:18:26,957 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-14 16:18:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-14 16:18:26,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:26,958 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:26,958 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:26,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:26,958 INFO L82 PathProgramCache]: Analyzing trace with hash -798530527, now seen corresponding path program 19 times [2018-10-14 16:18:26,959 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:27,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:27,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-14 16:18:27,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-14 16:18:27,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-14 16:18:27,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2018-10-14 16:18:27,434 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 23 states. [2018-10-14 16:18:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:27,938 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-10-14 16:18:27,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-14 16:18:27,939 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 114 [2018-10-14 16:18:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:27,939 INFO L225 Difference]: With dead ends: 120 [2018-10-14 16:18:27,939 INFO L226 Difference]: Without dead ends: 120 [2018-10-14 16:18:27,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-14 16:18:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-14 16:18:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2018-10-14 16:18:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-14 16:18:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-14 16:18:27,943 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 114 [2018-10-14 16:18:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:27,943 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-14 16:18:27,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-14 16:18:27,943 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-14 16:18:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-14 16:18:27,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:27,944 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:27,944 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:27,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:27,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1785809597, now seen corresponding path program 20 times [2018-10-14 16:18:27,945 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:28,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:28,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-14 16:18:28,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-14 16:18:28,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-14 16:18:28,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2018-10-14 16:18:28,510 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 24 states. [2018-10-14 16:18:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:29,005 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-14 16:18:29,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-14 16:18:29,010 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2018-10-14 16:18:29,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:29,011 INFO L225 Difference]: With dead ends: 123 [2018-10-14 16:18:29,011 INFO L226 Difference]: Without dead ends: 123 [2018-10-14 16:18:29,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-14 16:18:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-14 16:18:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2018-10-14 16:18:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-14 16:18:29,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-14 16:18:29,015 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 117 [2018-10-14 16:18:29,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:29,015 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-14 16:18:29,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-14 16:18:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-14 16:18:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-14 16:18:29,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:29,016 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:29,016 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:29,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:29,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1880540959, now seen corresponding path program 21 times [2018-10-14 16:18:29,017 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:29,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:29,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-14 16:18:29,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-14 16:18:29,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-14 16:18:29,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2018-10-14 16:18:29,566 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 25 states. [2018-10-14 16:18:30,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:30,184 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-10-14 16:18:30,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-14 16:18:30,190 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 120 [2018-10-14 16:18:30,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:30,191 INFO L225 Difference]: With dead ends: 126 [2018-10-14 16:18:30,192 INFO L226 Difference]: Without dead ends: 126 [2018-10-14 16:18:30,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-14 16:18:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-14 16:18:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2018-10-14 16:18:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-14 16:18:30,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-14 16:18:30,196 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 120 [2018-10-14 16:18:30,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:30,196 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-14 16:18:30,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-14 16:18:30,197 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-14 16:18:30,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-14 16:18:30,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:30,198 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:30,198 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:30,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:30,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2065934467, now seen corresponding path program 22 times [2018-10-14 16:18:30,199 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:30,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:30,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-14 16:18:30,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-14 16:18:30,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-14 16:18:30,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2018-10-14 16:18:30,667 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 26 states. [2018-10-14 16:18:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:31,278 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-14 16:18:31,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-14 16:18:31,279 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 123 [2018-10-14 16:18:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:31,279 INFO L225 Difference]: With dead ends: 129 [2018-10-14 16:18:31,280 INFO L226 Difference]: Without dead ends: 129 [2018-10-14 16:18:31,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-14 16:18:31,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-14 16:18:31,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2018-10-14 16:18:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-14 16:18:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-14 16:18:31,283 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 123 [2018-10-14 16:18:31,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:31,283 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-14 16:18:31,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-14 16:18:31,284 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-14 16:18:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-14 16:18:31,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:31,284 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:31,285 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:31,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:31,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1080589729, now seen corresponding path program 23 times [2018-10-14 16:18:31,286 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:32,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:32,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-14 16:18:32,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-14 16:18:32,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-14 16:18:32,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2018-10-14 16:18:32,168 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 27 states. [2018-10-14 16:18:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:32,770 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-10-14 16:18:32,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-14 16:18:32,771 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 126 [2018-10-14 16:18:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:32,772 INFO L225 Difference]: With dead ends: 132 [2018-10-14 16:18:32,772 INFO L226 Difference]: Without dead ends: 132 [2018-10-14 16:18:32,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-14 16:18:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-14 16:18:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2018-10-14 16:18:32,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-14 16:18:32,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-14 16:18:32,777 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 126 [2018-10-14 16:18:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:32,777 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-14 16:18:32,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-14 16:18:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-14 16:18:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-14 16:18:32,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:32,778 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:32,779 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:32,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:32,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1517999165, now seen corresponding path program 24 times [2018-10-14 16:18:32,780 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:33,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:33,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-14 16:18:33,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-14 16:18:33,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-14 16:18:33,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2018-10-14 16:18:33,215 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 28 states. [2018-10-14 16:18:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:33,808 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-14 16:18:33,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-14 16:18:33,809 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 129 [2018-10-14 16:18:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:33,809 INFO L225 Difference]: With dead ends: 135 [2018-10-14 16:18:33,809 INFO L226 Difference]: Without dead ends: 135 [2018-10-14 16:18:33,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-14 16:18:33,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-14 16:18:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2018-10-14 16:18:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-14 16:18:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-14 16:18:33,814 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 129 [2018-10-14 16:18:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:33,814 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-14 16:18:33,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-14 16:18:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-14 16:18:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-14 16:18:33,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:33,816 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:33,816 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:33,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:33,816 INFO L82 PathProgramCache]: Analyzing trace with hash 705770081, now seen corresponding path program 25 times [2018-10-14 16:18:33,817 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:34,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:34,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-14 16:18:34,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-14 16:18:34,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-14 16:18:34,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2018-10-14 16:18:34,570 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 29 states. [2018-10-14 16:18:35,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:35,297 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-10-14 16:18:35,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-14 16:18:35,298 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 132 [2018-10-14 16:18:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:35,299 INFO L225 Difference]: With dead ends: 138 [2018-10-14 16:18:35,299 INFO L226 Difference]: Without dead ends: 138 [2018-10-14 16:18:35,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-14 16:18:35,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-14 16:18:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2018-10-14 16:18:35,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-14 16:18:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-14 16:18:35,304 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 132 [2018-10-14 16:18:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:35,305 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-14 16:18:35,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-14 16:18:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-14 16:18:35,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-14 16:18:35,306 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:35,306 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:35,306 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:35,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:35,307 INFO L82 PathProgramCache]: Analyzing trace with hash -855163133, now seen corresponding path program 26 times [2018-10-14 16:18:35,308 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:35,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:35,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-14 16:18:35,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-14 16:18:35,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-14 16:18:35,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2018-10-14 16:18:35,883 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 30 states. [2018-10-14 16:18:36,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:36,549 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-14 16:18:36,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-14 16:18:36,550 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 135 [2018-10-14 16:18:36,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:36,551 INFO L225 Difference]: With dead ends: 141 [2018-10-14 16:18:36,551 INFO L226 Difference]: Without dead ends: 141 [2018-10-14 16:18:36,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-14 16:18:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-14 16:18:36,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2018-10-14 16:18:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-14 16:18:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-14 16:18:36,555 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 135 [2018-10-14 16:18:36,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:36,555 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-14 16:18:36,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-14 16:18:36,556 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-14 16:18:36,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-14 16:18:36,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:36,557 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:36,557 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:36,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:36,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1005627615, now seen corresponding path program 27 times [2018-10-14 16:18:36,558 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:37,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:37,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-14 16:18:37,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-14 16:18:37,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-14 16:18:37,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2018-10-14 16:18:37,055 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 31 states. [2018-10-14 16:18:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:37,794 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-10-14 16:18:37,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-14 16:18:37,794 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 138 [2018-10-14 16:18:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:37,796 INFO L225 Difference]: With dead ends: 144 [2018-10-14 16:18:37,796 INFO L226 Difference]: Without dead ends: 144 [2018-10-14 16:18:37,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-14 16:18:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-14 16:18:37,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2018-10-14 16:18:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-14 16:18:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-14 16:18:37,801 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 138 [2018-10-14 16:18:37,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:37,801 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-14 16:18:37,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-14 16:18:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-14 16:18:37,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-14 16:18:37,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:37,802 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:37,803 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:37,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:37,803 INFO L82 PathProgramCache]: Analyzing trace with hash 452846147, now seen corresponding path program 28 times [2018-10-14 16:18:37,804 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:38,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:38,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-14 16:18:38,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-14 16:18:38,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-14 16:18:38,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2018-10-14 16:18:38,348 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 32 states. [2018-10-14 16:18:39,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:39,410 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-14 16:18:39,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-14 16:18:39,410 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 141 [2018-10-14 16:18:39,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:39,411 INFO L225 Difference]: With dead ends: 147 [2018-10-14 16:18:39,411 INFO L226 Difference]: Without dead ends: 147 [2018-10-14 16:18:39,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-14 16:18:39,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-14 16:18:39,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2018-10-14 16:18:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-14 16:18:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-14 16:18:39,416 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 141 [2018-10-14 16:18:39,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:39,416 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-14 16:18:39,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-14 16:18:39,416 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-14 16:18:39,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-14 16:18:39,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:39,417 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:39,418 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:39,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:39,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1955523553, now seen corresponding path program 29 times [2018-10-14 16:18:39,419 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:40,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:40,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-14 16:18:40,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-14 16:18:40,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-14 16:18:40,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2018-10-14 16:18:40,412 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 33 states. [2018-10-14 16:18:41,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:41,330 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-10-14 16:18:41,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-14 16:18:41,330 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 144 [2018-10-14 16:18:41,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:41,331 INFO L225 Difference]: With dead ends: 150 [2018-10-14 16:18:41,331 INFO L226 Difference]: Without dead ends: 150 [2018-10-14 16:18:41,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-14 16:18:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-14 16:18:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2018-10-14 16:18:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-14 16:18:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-14 16:18:41,336 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 144 [2018-10-14 16:18:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:41,336 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-14 16:18:41,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-14 16:18:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-14 16:18:41,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-14 16:18:41,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:41,337 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:41,337 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:41,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1773999491, now seen corresponding path program 30 times [2018-10-14 16:18:41,338 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:42,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:42,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-14 16:18:42,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-14 16:18:42,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-14 16:18:42,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2018-10-14 16:18:42,569 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 34 states. [2018-10-14 16:18:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:44,685 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-14 16:18:44,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-14 16:18:44,685 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 147 [2018-10-14 16:18:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:44,687 INFO L225 Difference]: With dead ends: 153 [2018-10-14 16:18:44,687 INFO L226 Difference]: Without dead ends: 153 [2018-10-14 16:18:44,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-14 16:18:44,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-14 16:18:44,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2018-10-14 16:18:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-14 16:18:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-14 16:18:44,691 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 147 [2018-10-14 16:18:44,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:44,692 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-14 16:18:44,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-14 16:18:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-14 16:18:44,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-14 16:18:44,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:44,693 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:44,693 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:44,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:44,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1354494113, now seen corresponding path program 31 times [2018-10-14 16:18:44,694 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:45,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:45,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-14 16:18:45,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-14 16:18:45,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-14 16:18:45,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2018-10-14 16:18:45,800 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 35 states. [2018-10-14 16:18:46,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:46,903 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-10-14 16:18:46,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-14 16:18:46,903 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 150 [2018-10-14 16:18:46,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:46,904 INFO L225 Difference]: With dead ends: 156 [2018-10-14 16:18:46,904 INFO L226 Difference]: Without dead ends: 156 [2018-10-14 16:18:46,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-14 16:18:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-14 16:18:46,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2018-10-14 16:18:46,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-14 16:18:46,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-14 16:18:46,909 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 150 [2018-10-14 16:18:46,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:46,909 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-14 16:18:46,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-14 16:18:46,910 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-14 16:18:46,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-14 16:18:46,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:46,911 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:46,911 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:46,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:46,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2070357821, now seen corresponding path program 32 times [2018-10-14 16:18:46,912 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:47,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:47,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-14 16:18:47,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-14 16:18:47,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-14 16:18:47,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2018-10-14 16:18:47,647 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 36 states. [2018-10-14 16:18:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:48,702 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-14 16:18:48,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-14 16:18:48,702 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 153 [2018-10-14 16:18:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:48,704 INFO L225 Difference]: With dead ends: 159 [2018-10-14 16:18:48,704 INFO L226 Difference]: Without dead ends: 159 [2018-10-14 16:18:48,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-14 16:18:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-14 16:18:48,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2018-10-14 16:18:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-14 16:18:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-10-14 16:18:48,708 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 153 [2018-10-14 16:18:48,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:48,709 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-10-14 16:18:48,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-14 16:18:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-10-14 16:18:48,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-14 16:18:48,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:48,710 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:48,710 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:48,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:48,710 INFO L82 PathProgramCache]: Analyzing trace with hash -591239839, now seen corresponding path program 33 times [2018-10-14 16:18:48,711 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:50,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:50,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-14 16:18:50,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-14 16:18:50,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-14 16:18:50,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2018-10-14 16:18:50,190 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 37 states. [2018-10-14 16:18:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:51,198 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-10-14 16:18:51,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-14 16:18:51,198 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 156 [2018-10-14 16:18:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:51,199 INFO L225 Difference]: With dead ends: 162 [2018-10-14 16:18:51,199 INFO L226 Difference]: Without dead ends: 162 [2018-10-14 16:18:51,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-14 16:18:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-14 16:18:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2018-10-14 16:18:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-14 16:18:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-14 16:18:51,203 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 156 [2018-10-14 16:18:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:51,203 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-14 16:18:51,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-14 16:18:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-14 16:18:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-14 16:18:51,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:51,204 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:51,204 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:51,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:51,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1743072259, now seen corresponding path program 34 times [2018-10-14 16:18:51,205 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:51,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:51,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-14 16:18:51,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-14 16:18:51,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-14 16:18:51,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2018-10-14 16:18:51,968 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 38 states. [2018-10-14 16:18:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:53,101 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-14 16:18:53,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-14 16:18:53,102 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 159 [2018-10-14 16:18:53,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:53,102 INFO L225 Difference]: With dead ends: 165 [2018-10-14 16:18:53,103 INFO L226 Difference]: Without dead ends: 165 [2018-10-14 16:18:53,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-14 16:18:53,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-14 16:18:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2018-10-14 16:18:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-14 16:18:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-14 16:18:53,107 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 159 [2018-10-14 16:18:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:53,107 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-14 16:18:53,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-14 16:18:53,107 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-14 16:18:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-14 16:18:53,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:53,108 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:53,108 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:53,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:53,109 INFO L82 PathProgramCache]: Analyzing trace with hash -875673055, now seen corresponding path program 35 times [2018-10-14 16:18:53,109 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:53,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:53,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-14 16:18:53,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-14 16:18:53,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-14 16:18:53,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=776, Unknown=0, NotChecked=0, Total=1482 [2018-10-14 16:18:53,868 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 39 states. [2018-10-14 16:18:56,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:56,143 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-10-14 16:18:56,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-14 16:18:56,144 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 162 [2018-10-14 16:18:56,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:56,145 INFO L225 Difference]: With dead ends: 168 [2018-10-14 16:18:56,145 INFO L226 Difference]: Without dead ends: 168 [2018-10-14 16:18:56,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-14 16:18:56,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-14 16:18:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2018-10-14 16:18:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-14 16:18:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-10-14 16:18:56,148 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 162 [2018-10-14 16:18:56,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:56,148 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-10-14 16:18:56,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-14 16:18:56,148 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-10-14 16:18:56,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-14 16:18:56,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:56,149 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:56,149 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:56,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:56,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2131357885, now seen corresponding path program 36 times [2018-10-14 16:18:56,150 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:57,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:57,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-14 16:18:57,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-14 16:18:57,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-14 16:18:57,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=816, Unknown=0, NotChecked=0, Total=1560 [2018-10-14 16:18:57,574 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 40 states. [2018-10-14 16:18:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:18:58,650 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-14 16:18:58,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-14 16:18:58,651 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 165 [2018-10-14 16:18:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:18:58,652 INFO L225 Difference]: With dead ends: 171 [2018-10-14 16:18:58,653 INFO L226 Difference]: Without dead ends: 171 [2018-10-14 16:18:58,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-14 16:18:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-14 16:18:58,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2018-10-14 16:18:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-14 16:18:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-10-14 16:18:58,656 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 165 [2018-10-14 16:18:58,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:18:58,656 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-10-14 16:18:58,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-14 16:18:58,656 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-10-14 16:18:58,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-14 16:18:58,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:18:58,657 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:18:58,658 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:18:58,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:18:58,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1072980255, now seen corresponding path program 37 times [2018-10-14 16:18:58,659 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:18:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:18:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:18:59,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:18:59,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-14 16:18:59,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-14 16:18:59,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-14 16:18:59,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=857, Unknown=0, NotChecked=0, Total=1640 [2018-10-14 16:18:59,446 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 41 states. [2018-10-14 16:19:00,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:00,840 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2018-10-14 16:19:00,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-14 16:19:00,840 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 168 [2018-10-14 16:19:00,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:00,841 INFO L225 Difference]: With dead ends: 174 [2018-10-14 16:19:00,841 INFO L226 Difference]: Without dead ends: 174 [2018-10-14 16:19:00,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-14 16:19:00,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-14 16:19:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2018-10-14 16:19:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-14 16:19:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-14 16:19:00,845 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 168 [2018-10-14 16:19:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:00,845 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-14 16:19:00,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-14 16:19:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-14 16:19:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-14 16:19:00,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:00,846 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:00,846 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:00,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:00,847 INFO L82 PathProgramCache]: Analyzing trace with hash -299924861, now seen corresponding path program 38 times [2018-10-14 16:19:00,847 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:01,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:01,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-14 16:19:01,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-14 16:19:01,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-14 16:19:01,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=823, Invalid=899, Unknown=0, NotChecked=0, Total=1722 [2018-10-14 16:19:01,778 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 42 states. [2018-10-14 16:19:03,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:03,010 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-14 16:19:03,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-14 16:19:03,010 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 171 [2018-10-14 16:19:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:03,011 INFO L225 Difference]: With dead ends: 177 [2018-10-14 16:19:03,011 INFO L226 Difference]: Without dead ends: 177 [2018-10-14 16:19:03,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-14 16:19:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-14 16:19:03,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2018-10-14 16:19:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-14 16:19:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-14 16:19:03,015 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 171 [2018-10-14 16:19:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:03,015 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-14 16:19:03,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-14 16:19:03,015 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-14 16:19:03,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-14 16:19:03,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:03,016 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:03,017 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:03,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:03,017 INFO L82 PathProgramCache]: Analyzing trace with hash 178676641, now seen corresponding path program 39 times [2018-10-14 16:19:03,018 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:03,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:03,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-14 16:19:03,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-14 16:19:03,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-14 16:19:03,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=942, Unknown=0, NotChecked=0, Total=1806 [2018-10-14 16:19:03,958 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 43 states. [2018-10-14 16:19:05,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:05,658 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2018-10-14 16:19:05,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-14 16:19:05,659 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 174 [2018-10-14 16:19:05,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:05,659 INFO L225 Difference]: With dead ends: 180 [2018-10-14 16:19:05,660 INFO L226 Difference]: Without dead ends: 180 [2018-10-14 16:19:05,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-14 16:19:05,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-14 16:19:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2018-10-14 16:19:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-14 16:19:05,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-10-14 16:19:05,663 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 174 [2018-10-14 16:19:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:05,664 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-10-14 16:19:05,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-14 16:19:05,664 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-10-14 16:19:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-14 16:19:05,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:05,665 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:05,665 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:05,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:05,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1095399997, now seen corresponding path program 40 times [2018-10-14 16:19:05,666 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:06,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:06,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-14 16:19:06,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-14 16:19:06,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-14 16:19:06,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=986, Unknown=0, NotChecked=0, Total=1892 [2018-10-14 16:19:06,621 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 44 states. [2018-10-14 16:19:07,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:07,910 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-10-14 16:19:07,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-14 16:19:07,910 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 177 [2018-10-14 16:19:07,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:07,911 INFO L225 Difference]: With dead ends: 183 [2018-10-14 16:19:07,912 INFO L226 Difference]: Without dead ends: 183 [2018-10-14 16:19:07,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-14 16:19:07,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-14 16:19:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2018-10-14 16:19:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-14 16:19:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-10-14 16:19:07,914 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 177 [2018-10-14 16:19:07,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:07,914 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-10-14 16:19:07,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-14 16:19:07,914 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-10-14 16:19:07,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-14 16:19:07,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:07,915 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:07,915 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:07,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:07,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1808439393, now seen corresponding path program 41 times [2018-10-14 16:19:07,916 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:08,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:08,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-14 16:19:08,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-14 16:19:08,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-14 16:19:08,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1031, Unknown=0, NotChecked=0, Total=1980 [2018-10-14 16:19:08,917 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 45 states. [2018-10-14 16:19:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:10,537 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2018-10-14 16:19:10,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-14 16:19:10,538 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 180 [2018-10-14 16:19:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:10,539 INFO L225 Difference]: With dead ends: 186 [2018-10-14 16:19:10,539 INFO L226 Difference]: Without dead ends: 186 [2018-10-14 16:19:10,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-14 16:19:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-14 16:19:10,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2018-10-14 16:19:10,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-14 16:19:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-14 16:19:10,543 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 180 [2018-10-14 16:19:10,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:10,543 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-14 16:19:10,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-14 16:19:10,543 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-14 16:19:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-14 16:19:10,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:10,544 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:10,544 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:10,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash 856430851, now seen corresponding path program 42 times [2018-10-14 16:19:10,545 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:11,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:11,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-14 16:19:11,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-14 16:19:11,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-14 16:19:11,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=1077, Unknown=0, NotChecked=0, Total=2070 [2018-10-14 16:19:11,957 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 46 states. [2018-10-14 16:19:13,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:13,415 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-14 16:19:13,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-14 16:19:13,416 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 183 [2018-10-14 16:19:13,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:13,417 INFO L225 Difference]: With dead ends: 189 [2018-10-14 16:19:13,417 INFO L226 Difference]: Without dead ends: 189 [2018-10-14 16:19:13,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-14 16:19:13,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-14 16:19:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2018-10-14 16:19:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-14 16:19:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-14 16:19:13,420 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 183 [2018-10-14 16:19:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:13,420 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-14 16:19:13,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-14 16:19:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-14 16:19:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-14 16:19:13,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:13,421 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:13,421 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:13,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:13,422 INFO L82 PathProgramCache]: Analyzing trace with hash -760988383, now seen corresponding path program 43 times [2018-10-14 16:19:13,422 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:14,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:14,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-14 16:19:14,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-14 16:19:14,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-14 16:19:14,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1038, Invalid=1124, Unknown=0, NotChecked=0, Total=2162 [2018-10-14 16:19:14,600 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 47 states. [2018-10-14 16:19:16,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:16,322 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2018-10-14 16:19:16,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-14 16:19:16,323 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 186 [2018-10-14 16:19:16,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:16,324 INFO L225 Difference]: With dead ends: 192 [2018-10-14 16:19:16,324 INFO L226 Difference]: Without dead ends: 192 [2018-10-14 16:19:16,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-14 16:19:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-14 16:19:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2018-10-14 16:19:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-14 16:19:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2018-10-14 16:19:16,328 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 186 [2018-10-14 16:19:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:16,328 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2018-10-14 16:19:16,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-14 16:19:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2018-10-14 16:19:16,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-14 16:19:16,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:16,330 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:16,330 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:16,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:16,330 INFO L82 PathProgramCache]: Analyzing trace with hash -59294653, now seen corresponding path program 44 times [2018-10-14 16:19:16,331 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:17,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:17,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-14 16:19:17,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-14 16:19:17,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-14 16:19:17,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1084, Invalid=1172, Unknown=0, NotChecked=0, Total=2256 [2018-10-14 16:19:17,435 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 48 states. [2018-10-14 16:19:19,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:19,013 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-10-14 16:19:19,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-14 16:19:19,013 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 189 [2018-10-14 16:19:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:19,014 INFO L225 Difference]: With dead ends: 195 [2018-10-14 16:19:19,014 INFO L226 Difference]: Without dead ends: 195 [2018-10-14 16:19:19,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-14 16:19:19,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-14 16:19:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2018-10-14 16:19:19,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-14 16:19:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-14 16:19:19,017 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 189 [2018-10-14 16:19:19,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:19,018 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-14 16:19:19,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-14 16:19:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-14 16:19:19,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-14 16:19:19,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:19,019 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:19,019 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:19,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:19,020 INFO L82 PathProgramCache]: Analyzing trace with hash 492786145, now seen corresponding path program 45 times [2018-10-14 16:19:19,020 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:20,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:20,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-14 16:19:20,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-14 16:19:20,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-14 16:19:20,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=1221, Unknown=0, NotChecked=0, Total=2352 [2018-10-14 16:19:20,221 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 49 states. [2018-10-14 16:19:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:22,057 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2018-10-14 16:19:22,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-14 16:19:22,058 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 192 [2018-10-14 16:19:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:22,059 INFO L225 Difference]: With dead ends: 198 [2018-10-14 16:19:22,059 INFO L226 Difference]: Without dead ends: 198 [2018-10-14 16:19:22,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-14 16:19:22,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-14 16:19:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2018-10-14 16:19:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-14 16:19:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-14 16:19:22,061 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 192 [2018-10-14 16:19:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:22,062 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-14 16:19:22,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-14 16:19:22,062 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-14 16:19:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-14 16:19:22,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:22,063 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:22,063 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:22,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:22,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2102062979, now seen corresponding path program 46 times [2018-10-14 16:19:22,064 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:23,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:23,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-14 16:19:23,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-14 16:19:23,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-14 16:19:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2018-10-14 16:19:23,244 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 50 states. [2018-10-14 16:19:24,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:24,908 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-10-14 16:19:24,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-14 16:19:24,909 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 195 [2018-10-14 16:19:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:24,910 INFO L225 Difference]: With dead ends: 201 [2018-10-14 16:19:24,910 INFO L226 Difference]: Without dead ends: 201 [2018-10-14 16:19:24,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-14 16:19:24,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-14 16:19:24,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2018-10-14 16:19:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-14 16:19:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-10-14 16:19:24,912 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 195 [2018-10-14 16:19:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:24,913 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-10-14 16:19:24,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-14 16:19:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-10-14 16:19:24,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-14 16:19:24,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:24,914 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:24,914 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:24,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:24,914 INFO L82 PathProgramCache]: Analyzing trace with hash -651700575, now seen corresponding path program 47 times [2018-10-14 16:19:24,915 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:26,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:26,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-14 16:19:26,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-14 16:19:26,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-14 16:19:26,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2018-10-14 16:19:26,358 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 51 states. [2018-10-14 16:19:28,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:28,090 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2018-10-14 16:19:28,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-14 16:19:28,090 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 198 [2018-10-14 16:19:28,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:28,091 INFO L225 Difference]: With dead ends: 204 [2018-10-14 16:19:28,091 INFO L226 Difference]: Without dead ends: 204 [2018-10-14 16:19:28,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-14 16:19:28,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-14 16:19:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2018-10-14 16:19:28,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-10-14 16:19:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2018-10-14 16:19:28,094 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 198 [2018-10-14 16:19:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:28,094 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2018-10-14 16:19:28,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-14 16:19:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2018-10-14 16:19:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-14 16:19:28,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:28,095 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:28,096 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:28,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:28,096 INFO L82 PathProgramCache]: Analyzing trace with hash 148583107, now seen corresponding path program 48 times [2018-10-14 16:19:28,096 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:29,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:29,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-14 16:19:29,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-14 16:19:29,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-14 16:19:29,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1278, Invalid=1374, Unknown=0, NotChecked=0, Total=2652 [2018-10-14 16:19:29,355 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 52 states. [2018-10-14 16:19:31,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:31,468 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-10-14 16:19:31,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-14 16:19:31,469 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 201 [2018-10-14 16:19:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:31,470 INFO L225 Difference]: With dead ends: 207 [2018-10-14 16:19:31,470 INFO L226 Difference]: Without dead ends: 207 [2018-10-14 16:19:31,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-14 16:19:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-14 16:19:31,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2018-10-14 16:19:31,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-14 16:19:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-10-14 16:19:31,475 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 201 [2018-10-14 16:19:31,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:31,475 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-10-14 16:19:31,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-14 16:19:31,475 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-10-14 16:19:31,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-14 16:19:31,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:31,477 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:31,477 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:31,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash 36293473, now seen corresponding path program 49 times [2018-10-14 16:19:31,478 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:32,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:32,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-14 16:19:32,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-14 16:19:32,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-14 16:19:32,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1329, Invalid=1427, Unknown=0, NotChecked=0, Total=2756 [2018-10-14 16:19:32,740 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 53 states. [2018-10-14 16:19:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:34,614 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2018-10-14 16:19:34,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-14 16:19:34,614 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 204 [2018-10-14 16:19:34,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:34,615 INFO L225 Difference]: With dead ends: 210 [2018-10-14 16:19:34,615 INFO L226 Difference]: Without dead ends: 210 [2018-10-14 16:19:34,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-14 16:19:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-14 16:19:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2018-10-14 16:19:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-14 16:19:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-14 16:19:34,623 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 204 [2018-10-14 16:19:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:34,624 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-14 16:19:34,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-14 16:19:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-14 16:19:34,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-14 16:19:34,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:34,625 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:34,625 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:34,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:34,626 INFO L82 PathProgramCache]: Analyzing trace with hash 595330563, now seen corresponding path program 50 times [2018-10-14 16:19:34,626 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:36,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:36,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-14 16:19:36,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-14 16:19:36,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-14 16:19:36,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2018-10-14 16:19:36,947 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 54 states. [2018-10-14 16:19:38,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:38,796 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-10-14 16:19:38,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-14 16:19:38,796 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 207 [2018-10-14 16:19:38,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:38,798 INFO L225 Difference]: With dead ends: 213 [2018-10-14 16:19:38,798 INFO L226 Difference]: Without dead ends: 213 [2018-10-14 16:19:38,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-14 16:19:38,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-14 16:19:38,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2018-10-14 16:19:38,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-14 16:19:38,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-10-14 16:19:38,801 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 207 [2018-10-14 16:19:38,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:38,801 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-10-14 16:19:38,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-14 16:19:38,802 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-10-14 16:19:38,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-14 16:19:38,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:38,803 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:38,803 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:38,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:38,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1013895135, now seen corresponding path program 51 times [2018-10-14 16:19:38,804 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:40,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:40,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-14 16:19:40,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-14 16:19:40,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-14 16:19:40,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1434, Invalid=1536, Unknown=0, NotChecked=0, Total=2970 [2018-10-14 16:19:40,483 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 55 states. [2018-10-14 16:19:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:42,872 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2018-10-14 16:19:42,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-14 16:19:42,873 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 210 [2018-10-14 16:19:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:42,874 INFO L225 Difference]: With dead ends: 216 [2018-10-14 16:19:42,874 INFO L226 Difference]: Without dead ends: 216 [2018-10-14 16:19:42,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-14 16:19:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-14 16:19:42,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2018-10-14 16:19:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-14 16:19:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2018-10-14 16:19:42,877 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 210 [2018-10-14 16:19:42,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:42,877 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2018-10-14 16:19:42,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-14 16:19:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2018-10-14 16:19:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-14 16:19:42,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:42,879 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:42,879 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:42,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:42,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1031706301, now seen corresponding path program 52 times [2018-10-14 16:19:42,880 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:44,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:44,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-14 16:19:44,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-14 16:19:44,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-14 16:19:44,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1488, Invalid=1592, Unknown=0, NotChecked=0, Total=3080 [2018-10-14 16:19:44,420 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand 56 states. [2018-10-14 16:19:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:46,576 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-10-14 16:19:46,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-14 16:19:46,577 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 213 [2018-10-14 16:19:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:46,578 INFO L225 Difference]: With dead ends: 219 [2018-10-14 16:19:46,578 INFO L226 Difference]: Without dead ends: 219 [2018-10-14 16:19:46,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-14 16:19:46,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-14 16:19:46,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2018-10-14 16:19:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-10-14 16:19:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-10-14 16:19:46,582 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 213 [2018-10-14 16:19:46,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:46,583 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-10-14 16:19:46,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-14 16:19:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-10-14 16:19:46,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-14 16:19:46,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:46,584 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:46,584 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:46,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:46,585 INFO L82 PathProgramCache]: Analyzing trace with hash 931792097, now seen corresponding path program 53 times [2018-10-14 16:19:46,585 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:47,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:47,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-14 16:19:47,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-14 16:19:47,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-14 16:19:47,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1543, Invalid=1649, Unknown=0, NotChecked=0, Total=3192 [2018-10-14 16:19:47,949 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 57 states. [2018-10-14 16:19:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:50,068 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2018-10-14 16:19:50,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-14 16:19:50,068 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 216 [2018-10-14 16:19:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:50,069 INFO L225 Difference]: With dead ends: 222 [2018-10-14 16:19:50,069 INFO L226 Difference]: Without dead ends: 222 [2018-10-14 16:19:50,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-14 16:19:50,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-14 16:19:50,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2018-10-14 16:19:50,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-14 16:19:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-14 16:19:50,073 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 216 [2018-10-14 16:19:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:50,073 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-14 16:19:50,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-14 16:19:50,073 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-14 16:19:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-14 16:19:50,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:50,075 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:50,075 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:50,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:50,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1942004605, now seen corresponding path program 54 times [2018-10-14 16:19:50,076 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:51,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:51,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-14 16:19:51,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-14 16:19:51,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-14 16:19:51,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1599, Invalid=1707, Unknown=0, NotChecked=0, Total=3306 [2018-10-14 16:19:51,832 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 58 states. [2018-10-14 16:19:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:54,054 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-10-14 16:19:54,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-14 16:19:54,054 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 219 [2018-10-14 16:19:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:54,055 INFO L225 Difference]: With dead ends: 225 [2018-10-14 16:19:54,055 INFO L226 Difference]: Without dead ends: 225 [2018-10-14 16:19:54,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-14 16:19:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-14 16:19:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2018-10-14 16:19:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-14 16:19:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-10-14 16:19:54,058 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 219 [2018-10-14 16:19:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:54,059 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-10-14 16:19:54,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-14 16:19:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-10-14 16:19:54,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-14 16:19:54,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:54,060 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:54,061 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:54,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:54,061 INFO L82 PathProgramCache]: Analyzing trace with hash 658524577, now seen corresponding path program 55 times [2018-10-14 16:19:54,061 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:55,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:55,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-14 16:19:55,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-14 16:19:55,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-14 16:19:55,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1656, Invalid=1766, Unknown=0, NotChecked=0, Total=3422 [2018-10-14 16:19:55,697 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 59 states. [2018-10-14 16:19:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:19:58,197 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2018-10-14 16:19:58,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-14 16:19:58,197 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 222 [2018-10-14 16:19:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:19:58,198 INFO L225 Difference]: With dead ends: 228 [2018-10-14 16:19:58,198 INFO L226 Difference]: Without dead ends: 228 [2018-10-14 16:19:58,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-14 16:19:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-14 16:19:58,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2018-10-14 16:19:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-10-14 16:19:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 226 transitions. [2018-10-14 16:19:58,201 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 226 transitions. Word has length 222 [2018-10-14 16:19:58,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:19:58,202 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 226 transitions. [2018-10-14 16:19:58,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-14 16:19:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 226 transitions. [2018-10-14 16:19:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-14 16:19:58,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:19:58,203 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:19:58,203 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:19:58,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:19:58,203 INFO L82 PathProgramCache]: Analyzing trace with hash 403300291, now seen corresponding path program 56 times [2018-10-14 16:19:58,204 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:19:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:19:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:19:59,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:19:59,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-14 16:19:59,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-14 16:19:59,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-14 16:19:59,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1714, Invalid=1826, Unknown=0, NotChecked=0, Total=3540 [2018-10-14 16:19:59,901 INFO L87 Difference]: Start difference. First operand 226 states and 226 transitions. Second operand 60 states. [2018-10-14 16:20:02,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:20:02,630 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-10-14 16:20:02,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-14 16:20:02,631 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 225 [2018-10-14 16:20:02,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:20:02,631 INFO L225 Difference]: With dead ends: 231 [2018-10-14 16:20:02,632 INFO L226 Difference]: Without dead ends: 231 [2018-10-14 16:20:02,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-14 16:20:02,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-14 16:20:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2018-10-14 16:20:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-14 16:20:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2018-10-14 16:20:02,635 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 225 [2018-10-14 16:20:02,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:20:02,636 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2018-10-14 16:20:02,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-14 16:20:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2018-10-14 16:20:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-14 16:20:02,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:20:02,637 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:20:02,637 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:20:02,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:20:02,638 INFO L82 PathProgramCache]: Analyzing trace with hash -891290015, now seen corresponding path program 57 times [2018-10-14 16:20:02,638 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:20:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:20:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:20:04,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:20:04,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-14 16:20:04,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-14 16:20:04,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-14 16:20:04,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1773, Invalid=1887, Unknown=0, NotChecked=0, Total=3660 [2018-10-14 16:20:04,344 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 61 states. [2018-10-14 16:20:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:20:06,944 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2018-10-14 16:20:06,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-14 16:20:06,945 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 228 [2018-10-14 16:20:06,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:20:06,946 INFO L225 Difference]: With dead ends: 234 [2018-10-14 16:20:06,946 INFO L226 Difference]: Without dead ends: 234 [2018-10-14 16:20:06,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-14 16:20:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-14 16:20:06,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2018-10-14 16:20:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-14 16:20:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-14 16:20:06,949 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 228 [2018-10-14 16:20:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:20:06,950 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-14 16:20:06,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-14 16:20:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-14 16:20:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-14 16:20:06,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:20:06,951 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:20:06,951 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:20:06,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:20:06,952 INFO L82 PathProgramCache]: Analyzing trace with hash 775222019, now seen corresponding path program 58 times [2018-10-14 16:20:06,952 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:20:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:20:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:20:08,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:20:08,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-14 16:20:08,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-14 16:20:08,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-14 16:20:08,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1833, Invalid=1949, Unknown=0, NotChecked=0, Total=3782 [2018-10-14 16:20:08,888 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 62 states. [2018-10-14 16:20:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:20:11,339 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-10-14 16:20:11,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-14 16:20:11,340 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 231 [2018-10-14 16:20:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:20:11,340 INFO L225 Difference]: With dead ends: 237 [2018-10-14 16:20:11,341 INFO L226 Difference]: Without dead ends: 237 [2018-10-14 16:20:11,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-14 16:20:11,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-14 16:20:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2018-10-14 16:20:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-14 16:20:11,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-10-14 16:20:11,344 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 231 [2018-10-14 16:20:11,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:20:11,344 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-10-14 16:20:11,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-14 16:20:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-10-14 16:20:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-14 16:20:11,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:20:11,346 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:20:11,346 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:20:11,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:20:11,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1986714847, now seen corresponding path program 59 times [2018-10-14 16:20:11,347 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:20:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:20:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:20:13,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:20:13,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-14 16:20:13,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-14 16:20:13,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-14 16:20:13,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1894, Invalid=2012, Unknown=0, NotChecked=0, Total=3906 [2018-10-14 16:20:13,283 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 63 states. [2018-10-14 16:20:15,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:20:15,805 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2018-10-14 16:20:15,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-14 16:20:15,805 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 234 [2018-10-14 16:20:15,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:20:15,806 INFO L225 Difference]: With dead ends: 240 [2018-10-14 16:20:15,806 INFO L226 Difference]: Without dead ends: 240 [2018-10-14 16:20:15,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-14 16:20:15,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-10-14 16:20:15,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2018-10-14 16:20:15,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-10-14 16:20:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2018-10-14 16:20:15,809 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 234 [2018-10-14 16:20:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:20:15,810 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2018-10-14 16:20:15,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-14 16:20:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2018-10-14 16:20:15,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-14 16:20:15,811 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:20:15,811 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:20:15,811 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:20:15,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:20:15,812 INFO L82 PathProgramCache]: Analyzing trace with hash 135566915, now seen corresponding path program 60 times [2018-10-14 16:20:15,812 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:20:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:20:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:20:17,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:20:17,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-14 16:20:17,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-14 16:20:17,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-14 16:20:17,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1956, Invalid=2076, Unknown=0, NotChecked=0, Total=4032 [2018-10-14 16:20:17,852 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 64 states. [2018-10-14 16:20:20,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:20:20,466 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-10-14 16:20:20,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-14 16:20:20,466 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 237 [2018-10-14 16:20:20,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:20:20,467 INFO L225 Difference]: With dead ends: 243 [2018-10-14 16:20:20,467 INFO L226 Difference]: Without dead ends: 243 [2018-10-14 16:20:20,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-14 16:20:20,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-14 16:20:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 241. [2018-10-14 16:20:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-10-14 16:20:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2018-10-14 16:20:20,471 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 237 [2018-10-14 16:20:20,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:20:20,471 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2018-10-14 16:20:20,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-14 16:20:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2018-10-14 16:20:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-10-14 16:20:20,472 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:20:20,473 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:20:20,473 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:20:20,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:20:20,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1182025759, now seen corresponding path program 61 times [2018-10-14 16:20:20,474 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:20:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:20:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:20:22,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:20:22,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-14 16:20:22,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-14 16:20:22,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-14 16:20:22,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2019, Invalid=2141, Unknown=0, NotChecked=0, Total=4160 [2018-10-14 16:20:22,472 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 65 states. [2018-10-14 16:20:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:20:25,208 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2018-10-14 16:20:25,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-14 16:20:25,208 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 240 [2018-10-14 16:20:25,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:20:25,209 INFO L225 Difference]: With dead ends: 246 [2018-10-14 16:20:25,209 INFO L226 Difference]: Without dead ends: 246 [2018-10-14 16:20:25,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-14 16:20:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-14 16:20:25,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2018-10-14 16:20:25,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-14 16:20:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-14 16:20:25,213 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 240 [2018-10-14 16:20:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:20:25,213 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-14 16:20:25,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-14 16:20:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-14 16:20:25,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-14 16:20:25,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:20:25,214 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:20:25,214 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:20:25,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:20:25,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1879258749, now seen corresponding path program 62 times [2018-10-14 16:20:25,215 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:20:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:20:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:20:27,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:20:27,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-14 16:20:27,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-14 16:20:27,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-14 16:20:27,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2083, Invalid=2207, Unknown=0, NotChecked=0, Total=4290 [2018-10-14 16:20:27,343 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 66 states. [2018-10-14 16:20:30,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:20:30,120 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-10-14 16:20:30,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-14 16:20:30,120 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 243 [2018-10-14 16:20:30,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:20:30,121 INFO L225 Difference]: With dead ends: 249 [2018-10-14 16:20:30,121 INFO L226 Difference]: Without dead ends: 249 [2018-10-14 16:20:30,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-14 16:20:30,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-14 16:20:30,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2018-10-14 16:20:30,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-10-14 16:20:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-10-14 16:20:30,125 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 243 [2018-10-14 16:20:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:20:30,125 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-10-14 16:20:30,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-14 16:20:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-10-14 16:20:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-14 16:20:30,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:20:30,126 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:20:30,127 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:20:30,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:20:30,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1609546913, now seen corresponding path program 63 times [2018-10-14 16:20:30,128 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:20:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:20:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:20:32,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:20:32,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-14 16:20:32,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-14 16:20:32,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-14 16:20:32,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2148, Invalid=2274, Unknown=0, NotChecked=0, Total=4422 [2018-10-14 16:20:32,076 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 67 states. [2018-10-14 16:20:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:20:34,990 INFO L93 Difference]: Finished difference Result 252 states and 252 transitions. [2018-10-14 16:20:34,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-14 16:20:34,990 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 246 [2018-10-14 16:20:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:20:34,991 INFO L225 Difference]: With dead ends: 252 [2018-10-14 16:20:34,991 INFO L226 Difference]: Without dead ends: 252 [2018-10-14 16:20:34,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-14 16:20:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-10-14 16:20:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2018-10-14 16:20:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-10-14 16:20:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 250 transitions. [2018-10-14 16:20:34,995 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 250 transitions. Word has length 246 [2018-10-14 16:20:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:20:34,995 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 250 transitions. [2018-10-14 16:20:34,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-14 16:20:34,995 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 250 transitions. [2018-10-14 16:20:34,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-10-14 16:20:34,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:20:34,996 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:20:34,997 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:20:34,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:20:34,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1589539645, now seen corresponding path program 64 times [2018-10-14 16:20:34,998 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:20:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:20:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:20:36,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:20:36,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-14 16:20:36,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-14 16:20:36,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-14 16:20:36,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2214, Invalid=2342, Unknown=0, NotChecked=0, Total=4556 [2018-10-14 16:20:36,988 INFO L87 Difference]: Start difference. First operand 250 states and 250 transitions. Second operand 68 states. [2018-10-14 16:20:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:20:40,090 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2018-10-14 16:20:40,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-14 16:20:40,091 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 249 [2018-10-14 16:20:40,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:20:40,092 INFO L225 Difference]: With dead ends: 255 [2018-10-14 16:20:40,092 INFO L226 Difference]: Without dead ends: 255 [2018-10-14 16:20:40,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-14 16:20:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-14 16:20:40,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2018-10-14 16:20:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-10-14 16:20:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2018-10-14 16:20:40,095 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 249 [2018-10-14 16:20:40,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:20:40,095 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2018-10-14 16:20:40,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-14 16:20:40,096 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2018-10-14 16:20:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-10-14 16:20:40,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:20:40,097 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:20:40,097 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:20:40,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:20:40,097 INFO L82 PathProgramCache]: Analyzing trace with hash -252890783, now seen corresponding path program 65 times [2018-10-14 16:20:40,097 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:20:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:20:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:20:42,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:20:42,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-14 16:20:42,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-14 16:20:42,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-14 16:20:42,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2281, Invalid=2411, Unknown=0, NotChecked=0, Total=4692 [2018-10-14 16:20:42,100 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 69 states. [2018-10-14 16:20:45,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:20:45,274 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2018-10-14 16:20:45,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-14 16:20:45,274 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 252 [2018-10-14 16:20:45,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:20:45,275 INFO L225 Difference]: With dead ends: 258 [2018-10-14 16:20:45,275 INFO L226 Difference]: Without dead ends: 258 [2018-10-14 16:20:45,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-14 16:20:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-14 16:20:45,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2018-10-14 16:20:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-14 16:20:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-14 16:20:45,278 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 252 [2018-10-14 16:20:45,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:20:45,278 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-14 16:20:45,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-14 16:20:45,279 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-14 16:20:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-14 16:20:45,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:20:45,279 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:20:45,280 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:20:45,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:20:45,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1211555843, now seen corresponding path program 66 times [2018-10-14 16:20:45,280 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:20:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:20:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:20:47,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:20:47,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-14 16:20:47,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-14 16:20:47,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-14 16:20:47,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2349, Invalid=2481, Unknown=0, NotChecked=0, Total=4830 [2018-10-14 16:20:47,308 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 70 states. [2018-10-14 16:20:50,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:20:50,589 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-10-14 16:20:50,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-14 16:20:50,589 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 255 [2018-10-14 16:20:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:20:50,590 INFO L225 Difference]: With dead ends: 261 [2018-10-14 16:20:50,590 INFO L226 Difference]: Without dead ends: 261 [2018-10-14 16:20:50,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-14 16:20:50,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-14 16:20:50,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 259. [2018-10-14 16:20:50,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-10-14 16:20:50,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-10-14 16:20:50,594 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 255 [2018-10-14 16:20:50,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:20:50,595 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-10-14 16:20:50,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-14 16:20:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-10-14 16:20:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-14 16:20:50,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:20:50,596 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:20:50,596 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:20:50,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:20:50,597 INFO L82 PathProgramCache]: Analyzing trace with hash 263198241, now seen corresponding path program 67 times [2018-10-14 16:20:50,597 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:20:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:20:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:20:52,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:20:52,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-10-14 16:20:52,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-14 16:20:52,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-14 16:20:52,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2418, Invalid=2552, Unknown=0, NotChecked=0, Total=4970 [2018-10-14 16:20:52,934 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 71 states. [2018-10-14 16:20:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:20:56,177 INFO L93 Difference]: Finished difference Result 264 states and 264 transitions. [2018-10-14 16:20:56,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-14 16:20:56,177 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 258 [2018-10-14 16:20:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:20:56,178 INFO L225 Difference]: With dead ends: 264 [2018-10-14 16:20:56,178 INFO L226 Difference]: Without dead ends: 264 [2018-10-14 16:20:56,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-14 16:20:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-14 16:20:56,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2018-10-14 16:20:56,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-10-14 16:20:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 262 transitions. [2018-10-14 16:20:56,181 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 262 transitions. Word has length 258 [2018-10-14 16:20:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:20:56,181 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 262 transitions. [2018-10-14 16:20:56,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-14 16:20:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 262 transitions. [2018-10-14 16:20:56,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-10-14 16:20:56,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:20:56,182 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:20:56,182 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:20:56,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:20:56,183 INFO L82 PathProgramCache]: Analyzing trace with hash 36750147, now seen corresponding path program 68 times [2018-10-14 16:20:56,183 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:20:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:20:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:20:59,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:20:59,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-14 16:20:59,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-14 16:20:59,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-14 16:20:59,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2488, Invalid=2624, Unknown=0, NotChecked=0, Total=5112 [2018-10-14 16:20:59,036 INFO L87 Difference]: Start difference. First operand 262 states and 262 transitions. Second operand 72 states. [2018-10-14 16:21:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:21:02,216 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2018-10-14 16:21:02,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-14 16:21:02,216 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 261 [2018-10-14 16:21:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:21:02,217 INFO L225 Difference]: With dead ends: 267 [2018-10-14 16:21:02,217 INFO L226 Difference]: Without dead ends: 267 [2018-10-14 16:21:02,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-14 16:21:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-14 16:21:02,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2018-10-14 16:21:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-10-14 16:21:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2018-10-14 16:21:02,221 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 261 [2018-10-14 16:21:02,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:21:02,222 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2018-10-14 16:21:02,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-14 16:21:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2018-10-14 16:21:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-10-14 16:21:02,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:21:02,223 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:21:02,223 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:21:02,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:21:02,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1315203809, now seen corresponding path program 69 times [2018-10-14 16:21:02,223 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:21:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:21:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:21:04,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:21:04,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-10-14 16:21:04,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-14 16:21:04,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-14 16:21:04,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2559, Invalid=2697, Unknown=0, NotChecked=0, Total=5256 [2018-10-14 16:21:04,788 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 73 states. [2018-10-14 16:21:08,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:21:08,163 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2018-10-14 16:21:08,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-14 16:21:08,164 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 264 [2018-10-14 16:21:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:21:08,165 INFO L225 Difference]: With dead ends: 270 [2018-10-14 16:21:08,165 INFO L226 Difference]: Without dead ends: 270 [2018-10-14 16:21:08,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-14 16:21:08,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-14 16:21:08,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 268. [2018-10-14 16:21:08,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-14 16:21:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-14 16:21:08,168 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 264 [2018-10-14 16:21:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:21:08,169 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-14 16:21:08,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-14 16:21:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-14 16:21:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-14 16:21:08,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:21:08,170 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:21:08,170 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:21:08,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:21:08,170 INFO L82 PathProgramCache]: Analyzing trace with hash -41732477, now seen corresponding path program 70 times [2018-10-14 16:21:08,171 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:21:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:21:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:21:10,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:21:10,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-14 16:21:10,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-14 16:21:10,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-14 16:21:10,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2631, Invalid=2771, Unknown=0, NotChecked=0, Total=5402 [2018-10-14 16:21:10,453 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 74 states. [2018-10-14 16:21:14,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:21:14,070 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-10-14 16:21:14,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-14 16:21:14,071 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 267 [2018-10-14 16:21:14,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:21:14,071 INFO L225 Difference]: With dead ends: 273 [2018-10-14 16:21:14,072 INFO L226 Difference]: Without dead ends: 273 [2018-10-14 16:21:14,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-14 16:21:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-10-14 16:21:14,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 271. [2018-10-14 16:21:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-10-14 16:21:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2018-10-14 16:21:14,074 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 267 [2018-10-14 16:21:14,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:21:14,075 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2018-10-14 16:21:14,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-14 16:21:14,075 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2018-10-14 16:21:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-10-14 16:21:14,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:21:14,076 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:21:14,076 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:21:14,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:21:14,076 INFO L82 PathProgramCache]: Analyzing trace with hash -298438751, now seen corresponding path program 71 times [2018-10-14 16:21:14,077 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:21:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:21:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 7526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:21:16,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:21:16,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-10-14 16:21:16,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-14 16:21:16,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-14 16:21:16,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2704, Invalid=2846, Unknown=0, NotChecked=0, Total=5550 [2018-10-14 16:21:16,428 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 75 states. [2018-10-14 16:21:20,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:21:20,338 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2018-10-14 16:21:20,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-14 16:21:20,338 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 270 [2018-10-14 16:21:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:21:20,339 INFO L225 Difference]: With dead ends: 276 [2018-10-14 16:21:20,339 INFO L226 Difference]: Without dead ends: 276 [2018-10-14 16:21:20,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-10-14 16:21:20,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-10-14 16:21:20,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 274. [2018-10-14 16:21:20,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-10-14 16:21:20,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 274 transitions. [2018-10-14 16:21:20,342 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 274 transitions. Word has length 270 [2018-10-14 16:21:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:21:20,342 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 274 transitions. [2018-10-14 16:21:20,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-14 16:21:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 274 transitions. [2018-10-14 16:21:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-10-14 16:21:20,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:21:20,344 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:21:20,344 INFO L424 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:21:20,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:21:20,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1501706691, now seen corresponding path program 72 times [2018-10-14 16:21:20,344 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:21:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:21:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 0 proven. 7740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:21:23,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:21:23,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-14 16:21:23,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-14 16:21:23,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-14 16:21:23,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2778, Invalid=2922, Unknown=0, NotChecked=0, Total=5700 [2018-10-14 16:21:23,025 INFO L87 Difference]: Start difference. First operand 274 states and 274 transitions. Second operand 76 states. [2018-10-14 16:21:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:21:26,877 INFO L93 Difference]: Finished difference Result 279 states and 279 transitions. [2018-10-14 16:21:26,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-14 16:21:26,877 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 273 [2018-10-14 16:21:26,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:21:26,878 INFO L225 Difference]: With dead ends: 279 [2018-10-14 16:21:26,878 INFO L226 Difference]: Without dead ends: 279 [2018-10-14 16:21:26,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-10-14 16:21:26,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-14 16:21:26,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 277. [2018-10-14 16:21:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-10-14 16:21:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2018-10-14 16:21:26,882 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 273 [2018-10-14 16:21:26,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:21:26,882 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2018-10-14 16:21:26,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-14 16:21:26,882 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2018-10-14 16:21:26,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-10-14 16:21:26,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:21:26,883 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:21:26,883 INFO L424 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:21:26,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:21:26,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1622055839, now seen corresponding path program 73 times [2018-10-14 16:21:26,884 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:21:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:21:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 7957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:21:29,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:21:29,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-10-14 16:21:29,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-14 16:21:29,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-14 16:21:29,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2853, Invalid=2999, Unknown=0, NotChecked=0, Total=5852 [2018-10-14 16:21:29,573 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 77 states. [2018-10-14 16:21:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:21:33,280 INFO L93 Difference]: Finished difference Result 282 states and 282 transitions. [2018-10-14 16:21:33,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-14 16:21:33,281 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 276 [2018-10-14 16:21:33,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:21:33,282 INFO L225 Difference]: With dead ends: 282 [2018-10-14 16:21:33,282 INFO L226 Difference]: Without dead ends: 282 [2018-10-14 16:21:33,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-10-14 16:21:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-10-14 16:21:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2018-10-14 16:21:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-14 16:21:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-14 16:21:33,285 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 276 [2018-10-14 16:21:33,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:21:33,285 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-14 16:21:33,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-14 16:21:33,285 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-14 16:21:33,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-14 16:21:33,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:21:33,287 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:21:33,287 INFO L424 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:21:33,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:21:33,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1719782659, now seen corresponding path program 74 times [2018-10-14 16:21:33,287 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:21:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:21:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:21:35,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:21:35,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-14 16:21:35,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-14 16:21:35,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-14 16:21:35,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2929, Invalid=3077, Unknown=0, NotChecked=0, Total=6006 [2018-10-14 16:21:35,953 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 78 states. [2018-10-14 16:21:39,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:21:39,764 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2018-10-14 16:21:39,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-14 16:21:39,765 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 279 [2018-10-14 16:21:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:21:39,766 INFO L225 Difference]: With dead ends: 285 [2018-10-14 16:21:39,766 INFO L226 Difference]: Without dead ends: 285 [2018-10-14 16:21:39,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2775 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-10-14 16:21:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-10-14 16:21:39,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2018-10-14 16:21:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-10-14 16:21:39,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2018-10-14 16:21:39,770 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 279 [2018-10-14 16:21:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:21:39,770 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2018-10-14 16:21:39,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-14 16:21:39,770 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2018-10-14 16:21:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-10-14 16:21:39,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:21:39,771 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:21:39,771 INFO L424 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:21:39,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:21:39,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1088555297, now seen corresponding path program 75 times [2018-10-14 16:21:39,772 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:21:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:21:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 0 proven. 8400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:21:42,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:21:42,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-10-14 16:21:42,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-14 16:21:42,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-14 16:21:42,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3006, Invalid=3156, Unknown=0, NotChecked=0, Total=6162 [2018-10-14 16:21:42,411 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 79 states. [2018-10-14 16:21:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:21:46,320 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2018-10-14 16:21:46,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-14 16:21:46,320 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 282 [2018-10-14 16:21:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:21:46,321 INFO L225 Difference]: With dead ends: 288 [2018-10-14 16:21:46,321 INFO L226 Difference]: Without dead ends: 288 [2018-10-14 16:21:46,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-10-14 16:21:46,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-10-14 16:21:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 286. [2018-10-14 16:21:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-10-14 16:21:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 286 transitions. [2018-10-14 16:21:46,325 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 286 transitions. Word has length 282 [2018-10-14 16:21:46,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:21:46,325 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 286 transitions. [2018-10-14 16:21:46,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-14 16:21:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 286 transitions. [2018-10-14 16:21:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-10-14 16:21:46,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:21:46,326 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:21:46,326 INFO L424 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:21:46,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:21:46,327 INFO L82 PathProgramCache]: Analyzing trace with hash -438964157, now seen corresponding path program 76 times [2018-10-14 16:21:46,327 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:21:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:21:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 0 proven. 8626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:21:49,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:21:49,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-14 16:21:49,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-14 16:21:49,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-14 16:21:49,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3084, Invalid=3236, Unknown=0, NotChecked=0, Total=6320 [2018-10-14 16:21:49,212 INFO L87 Difference]: Start difference. First operand 286 states and 286 transitions. Second operand 80 states. [2018-10-14 16:21:53,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:21:53,201 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2018-10-14 16:21:53,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-14 16:21:53,202 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 285 [2018-10-14 16:21:53,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:21:53,203 INFO L225 Difference]: With dead ends: 291 [2018-10-14 16:21:53,203 INFO L226 Difference]: Without dead ends: 291 [2018-10-14 16:21:53,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-10-14 16:21:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-14 16:21:53,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2018-10-14 16:21:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-10-14 16:21:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2018-10-14 16:21:53,206 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 285 [2018-10-14 16:21:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:21:53,206 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2018-10-14 16:21:53,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-14 16:21:53,206 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2018-10-14 16:21:53,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-10-14 16:21:53,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:21:53,207 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:21:53,208 INFO L424 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:21:53,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:21:53,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1592517151, now seen corresponding path program 77 times [2018-10-14 16:21:53,209 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:21:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:21:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 0 proven. 8855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:21:56,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:21:56,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-10-14 16:21:56,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-14 16:21:56,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-14 16:21:56,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3163, Invalid=3317, Unknown=0, NotChecked=0, Total=6480 [2018-10-14 16:21:56,200 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand 81 states. [2018-10-14 16:22:00,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:22:00,485 INFO L93 Difference]: Finished difference Result 294 states and 294 transitions. [2018-10-14 16:22:00,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-14 16:22:00,485 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 288 [2018-10-14 16:22:00,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:22:00,486 INFO L225 Difference]: With dead ends: 294 [2018-10-14 16:22:00,486 INFO L226 Difference]: Without dead ends: 294 [2018-10-14 16:22:00,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-10-14 16:22:00,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-10-14 16:22:00,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 292. [2018-10-14 16:22:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-14 16:22:00,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-14 16:22:00,490 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 288 [2018-10-14 16:22:00,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:22:00,490 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-14 16:22:00,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-14 16:22:00,490 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-14 16:22:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-14 16:22:00,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:22:00,491 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:22:00,491 INFO L424 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:22:00,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:22:00,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1238541187, now seen corresponding path program 78 times [2018-10-14 16:22:00,492 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:22:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:22:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 0 proven. 9087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:22:03,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:22:03,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-10-14 16:22:03,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-14 16:22:03,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-14 16:22:03,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3243, Invalid=3399, Unknown=0, NotChecked=0, Total=6642 [2018-10-14 16:22:03,312 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 82 states. [2018-10-14 16:22:07,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:22:07,564 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2018-10-14 16:22:07,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-14 16:22:07,565 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 291 [2018-10-14 16:22:07,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:22:07,566 INFO L225 Difference]: With dead ends: 297 [2018-10-14 16:22:07,566 INFO L226 Difference]: Without dead ends: 297 [2018-10-14 16:22:07,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-10-14 16:22:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-10-14 16:22:07,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2018-10-14 16:22:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-10-14 16:22:07,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2018-10-14 16:22:07,569 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 291 [2018-10-14 16:22:07,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:22:07,569 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2018-10-14 16:22:07,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-14 16:22:07,569 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2018-10-14 16:22:07,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-14 16:22:07,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:22:07,570 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:22:07,570 INFO L424 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:22:07,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:22:07,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1024696993, now seen corresponding path program 79 times [2018-10-14 16:22:07,571 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:22:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:22:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9322 backedges. 0 proven. 9322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:22:10,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:22:10,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-10-14 16:22:10,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-14 16:22:10,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-14 16:22:10,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3324, Invalid=3482, Unknown=0, NotChecked=0, Total=6806 [2018-10-14 16:22:10,765 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand 83 states. [2018-10-14 16:22:15,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:22:15,243 INFO L93 Difference]: Finished difference Result 300 states and 300 transitions. [2018-10-14 16:22:15,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-14 16:22:15,243 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 294 [2018-10-14 16:22:15,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:22:15,244 INFO L225 Difference]: With dead ends: 300 [2018-10-14 16:22:15,244 INFO L226 Difference]: Without dead ends: 300 [2018-10-14 16:22:15,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-10-14 16:22:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2018-10-14 16:22:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 298. [2018-10-14 16:22:15,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-10-14 16:22:15,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 298 transitions. [2018-10-14 16:22:15,247 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 298 transitions. Word has length 294 [2018-10-14 16:22:15,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:22:15,248 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 298 transitions. [2018-10-14 16:22:15,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-14 16:22:15,248 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 298 transitions. [2018-10-14 16:22:15,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-10-14 16:22:15,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:22:15,249 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:22:15,249 INFO L424 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:22:15,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:22:15,249 INFO L82 PathProgramCache]: Analyzing trace with hash -171186493, now seen corresponding path program 80 times [2018-10-14 16:22:15,250 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:22:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:22:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 0 proven. 9560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:22:18,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:22:18,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-10-14 16:22:18,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-14 16:22:18,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-14 16:22:18,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3406, Invalid=3566, Unknown=0, NotChecked=0, Total=6972 [2018-10-14 16:22:18,148 INFO L87 Difference]: Start difference. First operand 298 states and 298 transitions. Second operand 84 states. [2018-10-14 16:22:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:22:22,594 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2018-10-14 16:22:22,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-14 16:22:22,595 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 297 [2018-10-14 16:22:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:22:22,596 INFO L225 Difference]: With dead ends: 303 [2018-10-14 16:22:22,596 INFO L226 Difference]: Without dead ends: 303 [2018-10-14 16:22:22,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3240 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-10-14 16:22:22,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-14 16:22:22,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2018-10-14 16:22:22,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-10-14 16:22:22,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 301 transitions. [2018-10-14 16:22:22,599 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 301 transitions. Word has length 297 [2018-10-14 16:22:22,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:22:22,600 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 301 transitions. [2018-10-14 16:22:22,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-14 16:22:22,600 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 301 transitions. [2018-10-14 16:22:22,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-10-14 16:22:22,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:22:22,601 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:22:22,601 INFO L424 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:22:22,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:22:22,602 INFO L82 PathProgramCache]: Analyzing trace with hash 17602401, now seen corresponding path program 81 times [2018-10-14 16:22:22,602 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:22:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:22:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:22:26,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:22:26,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-10-14 16:22:26,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-14 16:22:26,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-14 16:22:26,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3489, Invalid=3651, Unknown=0, NotChecked=0, Total=7140 [2018-10-14 16:22:26,137 INFO L87 Difference]: Start difference. First operand 301 states and 301 transitions. Second operand 85 states. [2018-10-14 16:22:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:22:30,855 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2018-10-14 16:22:30,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-14 16:22:30,855 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 300 [2018-10-14 16:22:30,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:22:30,856 INFO L225 Difference]: With dead ends: 306 [2018-10-14 16:22:30,856 INFO L226 Difference]: Without dead ends: 306 [2018-10-14 16:22:30,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=10374, Invalid=17016, Unknown=0, NotChecked=0, Total=27390 [2018-10-14 16:22:30,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-10-14 16:22:30,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2018-10-14 16:22:30,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-14 16:22:30,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-14 16:22:30,860 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 300 [2018-10-14 16:22:30,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:22:30,860 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-14 16:22:30,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-14 16:22:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-14 16:22:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-14 16:22:30,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:22:30,861 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:22:30,861 INFO L424 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:22:30,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:22:30,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2115353091, now seen corresponding path program 82 times [2018-10-14 16:22:30,862 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:22:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:22:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10045 backedges. 0 proven. 10045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:22:33,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:22:33,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-10-14 16:22:33,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-14 16:22:33,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-14 16:22:33,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3573, Invalid=3737, Unknown=0, NotChecked=0, Total=7310 [2018-10-14 16:22:33,950 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 86 states. [2018-10-14 16:22:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:22:38,707 INFO L93 Difference]: Finished difference Result 309 states and 309 transitions. [2018-10-14 16:22:38,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-14 16:22:38,707 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 303 [2018-10-14 16:22:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:22:38,709 INFO L225 Difference]: With dead ends: 309 [2018-10-14 16:22:38,709 INFO L226 Difference]: Without dead ends: 309 [2018-10-14 16:22:38,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3403 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=10625, Invalid=17431, Unknown=0, NotChecked=0, Total=28056 [2018-10-14 16:22:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-10-14 16:22:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 307. [2018-10-14 16:22:38,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-10-14 16:22:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2018-10-14 16:22:38,712 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 303 [2018-10-14 16:22:38,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:22:38,712 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2018-10-14 16:22:38,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-14 16:22:38,713 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2018-10-14 16:22:38,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-10-14 16:22:38,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:22:38,714 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:22:38,714 INFO L424 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:22:38,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:22:38,714 INFO L82 PathProgramCache]: Analyzing trace with hash 137034785, now seen corresponding path program 83 times [2018-10-14 16:22:38,715 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:22:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:22:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10292 backedges. 0 proven. 10292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:22:42,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:22:42,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-10-14 16:22:42,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-14 16:22:42,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-14 16:22:42,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3658, Invalid=3824, Unknown=0, NotChecked=0, Total=7482 [2018-10-14 16:22:42,148 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 87 states. [2018-10-14 16:22:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:22:46,934 INFO L93 Difference]: Finished difference Result 312 states and 312 transitions. [2018-10-14 16:22:46,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-14 16:22:46,934 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 306 [2018-10-14 16:22:46,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:22:46,935 INFO L225 Difference]: With dead ends: 312 [2018-10-14 16:22:46,935 INFO L226 Difference]: Without dead ends: 312 [2018-10-14 16:22:46,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=10879, Invalid=17851, Unknown=0, NotChecked=0, Total=28730 [2018-10-14 16:22:46,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-10-14 16:22:46,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 310. [2018-10-14 16:22:46,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2018-10-14 16:22:46,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 310 transitions. [2018-10-14 16:22:46,939 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 310 transitions. Word has length 306 [2018-10-14 16:22:46,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:22:46,939 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 310 transitions. [2018-10-14 16:22:46,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-14 16:22:46,939 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 310 transitions. [2018-10-14 16:22:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-10-14 16:22:46,940 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:22:46,940 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:22:46,940 INFO L424 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:22:46,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:22:46,941 INFO L82 PathProgramCache]: Analyzing trace with hash -402383549, now seen corresponding path program 84 times [2018-10-14 16:22:46,941 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:22:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:22:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10542 backedges. 0 proven. 10542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:22:50,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:22:50,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-10-14 16:22:50,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-14 16:22:50,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-14 16:22:50,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3744, Invalid=3912, Unknown=0, NotChecked=0, Total=7656 [2018-10-14 16:22:50,146 INFO L87 Difference]: Start difference. First operand 310 states and 310 transitions. Second operand 88 states. [2018-10-14 16:22:54,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:22:54,997 INFO L93 Difference]: Finished difference Result 315 states and 315 transitions. [2018-10-14 16:22:54,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-14 16:22:54,997 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 309 [2018-10-14 16:22:54,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:22:54,999 INFO L225 Difference]: With dead ends: 315 [2018-10-14 16:22:54,999 INFO L226 Difference]: Without dead ends: 315 [2018-10-14 16:22:55,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3570 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=11136, Invalid=18276, Unknown=0, NotChecked=0, Total=29412 [2018-10-14 16:22:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-14 16:22:55,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 313. [2018-10-14 16:22:55,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-10-14 16:22:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2018-10-14 16:22:55,003 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 309 [2018-10-14 16:22:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:22:55,003 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2018-10-14 16:22:55,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-14 16:22:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2018-10-14 16:22:55,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-10-14 16:22:55,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:22:55,005 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:22:55,005 INFO L424 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:22:55,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:22:55,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1553649889, now seen corresponding path program 85 times [2018-10-14 16:22:55,006 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:22:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:22:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10795 backedges. 0 proven. 10795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:22:58,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:22:58,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-10-14 16:22:58,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-14 16:22:58,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-14 16:22:58,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3831, Invalid=4001, Unknown=0, NotChecked=0, Total=7832 [2018-10-14 16:22:58,432 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand 89 states. [2018-10-14 16:23:03,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:23:03,409 INFO L93 Difference]: Finished difference Result 318 states and 318 transitions. [2018-10-14 16:23:03,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-14 16:23:03,409 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 312 [2018-10-14 16:23:03,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:23:03,411 INFO L225 Difference]: With dead ends: 318 [2018-10-14 16:23:03,411 INFO L226 Difference]: Without dead ends: 318 [2018-10-14 16:23:03,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=11396, Invalid=18706, Unknown=0, NotChecked=0, Total=30102 [2018-10-14 16:23:03,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-10-14 16:23:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2018-10-14 16:23:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-14 16:23:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-14 16:23:03,414 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 312 [2018-10-14 16:23:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:23:03,415 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-14 16:23:03,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-14 16:23:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-14 16:23:03,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-14 16:23:03,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:23:03,417 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:23:03,417 INFO L424 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:23:03,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:23:03,417 INFO L82 PathProgramCache]: Analyzing trace with hash -370470781, now seen corresponding path program 86 times [2018-10-14 16:23:03,418 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:23:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:23:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11051 backedges. 0 proven. 11051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:23:07,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:23:07,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-10-14 16:23:07,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-14 16:23:07,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-14 16:23:07,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3919, Invalid=4091, Unknown=0, NotChecked=0, Total=8010 [2018-10-14 16:23:07,031 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 90 states. [2018-10-14 16:23:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:23:12,064 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2018-10-14 16:23:12,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-14 16:23:12,064 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 315 [2018-10-14 16:23:12,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:23:12,065 INFO L225 Difference]: With dead ends: 321 [2018-10-14 16:23:12,066 INFO L226 Difference]: Without dead ends: 321 [2018-10-14 16:23:12,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=11659, Invalid=19141, Unknown=0, NotChecked=0, Total=30800 [2018-10-14 16:23:12,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-10-14 16:23:12,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 319. [2018-10-14 16:23:12,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-10-14 16:23:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 319 transitions. [2018-10-14 16:23:12,069 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 319 transitions. Word has length 315 [2018-10-14 16:23:12,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:23:12,069 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 319 transitions. [2018-10-14 16:23:12,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-14 16:23:12,069 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 319 transitions. [2018-10-14 16:23:12,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-10-14 16:23:12,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:23:12,071 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:23:12,071 INFO L424 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:23:12,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:23:12,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1215818335, now seen corresponding path program 87 times [2018-10-14 16:23:12,072 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:23:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:23:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11310 backedges. 0 proven. 11310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:23:15,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:23:15,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-10-14 16:23:15,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-14 16:23:15,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-14 16:23:15,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4008, Invalid=4182, Unknown=0, NotChecked=0, Total=8190 [2018-10-14 16:23:15,479 INFO L87 Difference]: Start difference. First operand 319 states and 319 transitions. Second operand 91 states. [2018-10-14 16:23:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:23:20,572 INFO L93 Difference]: Finished difference Result 324 states and 324 transitions. [2018-10-14 16:23:20,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-14 16:23:20,572 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 318 [2018-10-14 16:23:20,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:23:20,573 INFO L225 Difference]: With dead ends: 324 [2018-10-14 16:23:20,573 INFO L226 Difference]: Without dead ends: 324 [2018-10-14 16:23:20,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=11925, Invalid=19581, Unknown=0, NotChecked=0, Total=31506 [2018-10-14 16:23:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2018-10-14 16:23:20,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 322. [2018-10-14 16:23:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-10-14 16:23:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 322 transitions. [2018-10-14 16:23:20,577 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 322 transitions. Word has length 318 [2018-10-14 16:23:20,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:23:20,577 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 322 transitions. [2018-10-14 16:23:20,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-14 16:23:20,577 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 322 transitions. [2018-10-14 16:23:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-10-14 16:23:20,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:23:20,578 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:23:20,578 INFO L424 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:23:20,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:23:20,579 INFO L82 PathProgramCache]: Analyzing trace with hash 723424195, now seen corresponding path program 88 times [2018-10-14 16:23:20,579 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:23:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:23:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11572 backedges. 0 proven. 11572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:23:24,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:23:24,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-10-14 16:23:24,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-14 16:23:24,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-14 16:23:24,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4098, Invalid=4274, Unknown=0, NotChecked=0, Total=8372 [2018-10-14 16:23:24,288 INFO L87 Difference]: Start difference. First operand 322 states and 322 transitions. Second operand 92 states. [2018-10-14 16:23:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:23:29,498 INFO L93 Difference]: Finished difference Result 327 states and 327 transitions. [2018-10-14 16:23:29,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-14 16:23:29,498 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 321 [2018-10-14 16:23:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:23:29,499 INFO L225 Difference]: With dead ends: 327 [2018-10-14 16:23:29,499 INFO L226 Difference]: Without dead ends: 327 [2018-10-14 16:23:29,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3916 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=12194, Invalid=20026, Unknown=0, NotChecked=0, Total=32220 [2018-10-14 16:23:29,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-14 16:23:29,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 325. [2018-10-14 16:23:29,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-10-14 16:23:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 325 transitions. [2018-10-14 16:23:29,502 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 325 transitions. Word has length 321 [2018-10-14 16:23:29,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:23:29,503 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 325 transitions. [2018-10-14 16:23:29,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-14 16:23:29,503 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 325 transitions. [2018-10-14 16:23:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-10-14 16:23:29,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:23:29,504 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:23:29,504 INFO L424 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:23:29,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:23:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1092536929, now seen corresponding path program 89 times [2018-10-14 16:23:29,505 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:23:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:23:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11837 backedges. 0 proven. 11837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:23:33,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:23:33,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-10-14 16:23:33,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-14 16:23:33,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-14 16:23:33,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4189, Invalid=4367, Unknown=0, NotChecked=0, Total=8556 [2018-10-14 16:23:33,336 INFO L87 Difference]: Start difference. First operand 325 states and 325 transitions. Second operand 93 states. [2018-10-14 16:23:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:23:38,824 INFO L93 Difference]: Finished difference Result 330 states and 330 transitions. [2018-10-14 16:23:38,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-14 16:23:38,824 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 324 [2018-10-14 16:23:38,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:23:38,825 INFO L225 Difference]: With dead ends: 330 [2018-10-14 16:23:38,825 INFO L226 Difference]: Without dead ends: 330 [2018-10-14 16:23:38,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=12466, Invalid=20476, Unknown=0, NotChecked=0, Total=32942 [2018-10-14 16:23:38,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2018-10-14 16:23:38,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2018-10-14 16:23:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-14 16:23:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-14 16:23:38,829 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 324 [2018-10-14 16:23:38,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:23:38,830 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-14 16:23:38,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-14 16:23:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-14 16:23:38,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-14 16:23:38,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:23:38,831 INFO L375 BasicCegarLoop]: trace histogram [90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:23:38,831 INFO L424 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:23:38,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:23:38,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2081249533, now seen corresponding path program 90 times [2018-10-14 16:23:38,832 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:23:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:23:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12105 backedges. 0 proven. 12105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:23:42,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:23:42,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-10-14 16:23:42,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-14 16:23:42,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-14 16:23:42,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4281, Invalid=4461, Unknown=0, NotChecked=0, Total=8742 [2018-10-14 16:23:42,720 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 94 states. [2018-10-14 16:23:48,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:23:48,313 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2018-10-14 16:23:48,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-14 16:23:48,313 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 327 [2018-10-14 16:23:48,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:23:48,315 INFO L225 Difference]: With dead ends: 333 [2018-10-14 16:23:48,315 INFO L226 Difference]: Without dead ends: 333 [2018-10-14 16:23:48,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=12741, Invalid=20931, Unknown=0, NotChecked=0, Total=33672 [2018-10-14 16:23:48,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-10-14 16:23:48,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 331. [2018-10-14 16:23:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-10-14 16:23:48,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2018-10-14 16:23:48,319 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 327 [2018-10-14 16:23:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:23:48,319 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2018-10-14 16:23:48,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-14 16:23:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2018-10-14 16:23:48,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-10-14 16:23:48,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:23:48,320 INFO L375 BasicCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:23:48,320 INFO L424 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:23:48,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:23:48,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1351282465, now seen corresponding path program 91 times [2018-10-14 16:23:48,321 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:23:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:23:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12376 backedges. 0 proven. 12376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:23:52,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:23:52,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-10-14 16:23:52,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-14 16:23:52,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-14 16:23:52,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4374, Invalid=4556, Unknown=0, NotChecked=0, Total=8930 [2018-10-14 16:23:52,262 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand 95 states. [2018-10-14 16:23:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:23:57,728 INFO L93 Difference]: Finished difference Result 336 states and 336 transitions. [2018-10-14 16:23:57,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-14 16:23:57,736 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 330 [2018-10-14 16:23:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:23:57,737 INFO L225 Difference]: With dead ends: 336 [2018-10-14 16:23:57,737 INFO L226 Difference]: Without dead ends: 336 [2018-10-14 16:23:57,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4186 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=13019, Invalid=21391, Unknown=0, NotChecked=0, Total=34410 [2018-10-14 16:23:57,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2018-10-14 16:23:57,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 334. [2018-10-14 16:23:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2018-10-14 16:23:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 334 transitions. [2018-10-14 16:23:57,742 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 334 transitions. Word has length 330 [2018-10-14 16:23:57,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:23:57,743 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 334 transitions. [2018-10-14 16:23:57,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-14 16:23:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 334 transitions. [2018-10-14 16:23:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-10-14 16:23:57,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:23:57,745 INFO L375 BasicCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:23:57,745 INFO L424 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:23:57,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:23:57,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1035684419, now seen corresponding path program 92 times [2018-10-14 16:23:57,746 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:23:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12650 backedges. 0 proven. 12650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:01,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:01,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-10-14 16:24:01,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-14 16:24:01,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-14 16:24:01,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4468, Invalid=4652, Unknown=0, NotChecked=0, Total=9120 [2018-10-14 16:24:01,582 INFO L87 Difference]: Start difference. First operand 334 states and 334 transitions. Second operand 96 states. [2018-10-14 16:24:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:07,470 INFO L93 Difference]: Finished difference Result 339 states and 339 transitions. [2018-10-14 16:24:07,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-14 16:24:07,470 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 333 [2018-10-14 16:24:07,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:07,471 INFO L225 Difference]: With dead ends: 339 [2018-10-14 16:24:07,471 INFO L226 Difference]: Without dead ends: 339 [2018-10-14 16:24:07,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4278 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=13300, Invalid=21856, Unknown=0, NotChecked=0, Total=35156 [2018-10-14 16:24:07,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-14 16:24:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2018-10-14 16:24:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2018-10-14 16:24:07,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 337 transitions. [2018-10-14 16:24:07,475 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 337 transitions. Word has length 333 [2018-10-14 16:24:07,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:07,476 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 337 transitions. [2018-10-14 16:24:07,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-14 16:24:07,476 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 337 transitions. [2018-10-14 16:24:07,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-10-14 16:24:07,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:07,477 INFO L375 BasicCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:07,477 INFO L424 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:07,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:07,478 INFO L82 PathProgramCache]: Analyzing trace with hash 737706977, now seen corresponding path program 93 times [2018-10-14 16:24:07,478 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12927 backedges. 0 proven. 12927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:24:11,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:24:11,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-10-14 16:24:11,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-14 16:24:11,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-14 16:24:11,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4563, Invalid=4749, Unknown=0, NotChecked=0, Total=9312 [2018-10-14 16:24:11,369 INFO L87 Difference]: Start difference. First operand 337 states and 337 transitions. Second operand 97 states. [2018-10-14 16:24:16,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:16,948 INFO L93 Difference]: Finished difference Result 340 states and 340 transitions. [2018-10-14 16:24:16,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-14 16:24:16,948 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 336 [2018-10-14 16:24:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:16,950 INFO L225 Difference]: With dead ends: 340 [2018-10-14 16:24:16,950 INFO L226 Difference]: Without dead ends: 340 [2018-10-14 16:24:16,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=13584, Invalid=22326, Unknown=0, NotChecked=0, Total=35910 [2018-10-14 16:24:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2018-10-14 16:24:16,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2018-10-14 16:24:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-14 16:24:16,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-14 16:24:16,953 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 336 [2018-10-14 16:24:16,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:16,954 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-14 16:24:16,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-14 16:24:16,954 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-14 16:24:16,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-14 16:24:16,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:24:16,955 INFO L375 BasicCegarLoop]: trace histogram [94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:24:16,955 INFO L424 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:24:16,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:24:16,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1389133187, now seen corresponding path program 94 times [2018-10-14 16:24:16,956 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:24:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:24:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2018-10-14 16:24:17,470 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:24:17,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-10-14 16:24:17,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-14 16:24:17,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-14 16:24:17,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-10-14 16:24:17,471 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 8 states. [2018-10-14 16:24:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:24:17,855 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-14 16:24:17,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-14 16:24:17,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 339 [2018-10-14 16:24:17,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:24:17,855 INFO L225 Difference]: With dead ends: 338 [2018-10-14 16:24:17,855 INFO L226 Difference]: Without dead ends: 0 [2018-10-14 16:24:17,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-10-14 16:24:17,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-14 16:24:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-14 16:24:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-14 16:24:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-14 16:24:17,857 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 339 [2018-10-14 16:24:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:24:17,857 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-14 16:24:17,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-14 16:24:17,857 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-14 16:24:17,857 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-14 16:24:17,862 INFO L202 PluginConnector]: Adding new model 20051113-1.c_false-valid-memtrack.i_11.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 04:24:17 BoogieIcfgContainer [2018-10-14 16:24:17,862 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-14 16:24:17,863 INFO L168 Benchmark]: Toolchain (without parser) took 365194.72 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -167.8 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 459.0 MB). Peak memory consumption was 291.2 MB. Max. memory is 7.1 GB. [2018-10-14 16:24:17,864 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 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. [2018-10-14 16:24:17,865 INFO L168 Benchmark]: Boogie Preprocessor took 54.25 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. [2018-10-14 16:24:17,865 INFO L168 Benchmark]: RCFGBuilder took 615.04 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. [2018-10-14 16:24:17,866 INFO L168 Benchmark]: TraceAbstraction took 364520.63 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -167.8 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 427.3 MB). Peak memory consumption was 259.5 MB. Max. memory is 7.1 GB. [2018-10-14 16:24:17,868 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 0.15 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 54.25 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 615.04 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. * TraceAbstraction took 364520.63 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -167.8 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 427.3 MB). Peak memory consumption was 259.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 110]: 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, 62 locations, 1 error locations. SAFE Result, 364.4s OverallTime, 95 OverallIterations, 94 TraceHistogramMax, 210.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5117 SDtfs, 21517 SDslu, 161598 SDs, 0 SdLazy, 29773 SolverSat, 4608 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 28.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9130 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 8940 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138419 ImplicationChecksByTransitivity, 314.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=340occurred in iteration=94, 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, 95 MinimizatonAttempts, 186 StatesRemovedByMinimization, 93 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 146.3s InterpolantComputationTime, 18810 NumberOfCodeBlocks, 18810 NumberOfCodeBlocksAsserted, 95 NumberOfCheckSat, 18715 ConstructedInterpolants, 0 QuantifiedInterpolants, 18402035 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 95 InterpolantComputations, 2 PerfectInterpolantSequences, 13207/419710 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/20051113-1.c_false-valid-memtrack.i_11.bpl_heapsep-2018-09-18.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-10-14_16-24-17-878.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/20051113-1.c_false-valid-memtrack.i_11.bpl_heapsep-2018-09-18.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-14_16-24-17-878.csv Received shutdown request...