java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_true-valid-memsafety.i_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b8f97f7-m [2018-10-10 15:17:10,417 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-10 15:17:10,419 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-10 15:17:10,430 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-10 15:17:10,431 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-10 15:17:10,432 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-10 15:17:10,433 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-10 15:17:10,436 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-10 15:17:10,438 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-10 15:17:10,439 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-10 15:17:10,443 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-10 15:17:10,443 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-10 15:17:10,444 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-10 15:17:10,449 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-10 15:17:10,451 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-10 15:17:10,451 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-10 15:17:10,452 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-10 15:17:10,458 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-10 15:17:10,462 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-10 15:17:10,465 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-10 15:17:10,467 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-10 15:17:10,469 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-10 15:17:10,472 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-10 15:17:10,482 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-10 15:17:10,498 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-10 15:17:10,499 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-10 15:17:10,499 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-10 15:17:10,500 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-10 15:17:10,500 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-10 15:17:10,500 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-10 15:17:10,501 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-10 15:17:10,501 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-10 15:17:10,501 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-10 15:17:10,501 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-10 15:17:10,501 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-10 15:17:10,502 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-10 15:17:10,502 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-10 15:17:10,503 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-10 15:17:10,503 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-10 15:17:10,555 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-10 15:17:10,568 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-10 15:17:10,573 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-10 15:17:10,575 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-10 15:17:10,575 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-10 15:17:10,576 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_true-valid-memsafety.i_5.bpl [2018-10-10 15:17:10,576 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/960521-1_true-valid-memsafety.i_5.bpl' [2018-10-10 15:17:10,662 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-10 15:17:10,663 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-10 15:17:10,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-10 15:17:10,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-10 15:17:10,664 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-10 15:17:10,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:10" (1/1) ... [2018-10-10 15:17:10,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:10" (1/1) ... [2018-10-10 15:17:10,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:10" (1/1) ... [2018-10-10 15:17:10,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:10" (1/1) ... [2018-10-10 15:17:10,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:10" (1/1) ... [2018-10-10 15:17:10,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:10" (1/1) ... [2018-10-10 15:17:10,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:10" (1/1) ... [2018-10-10 15:17:10,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-10 15:17:10,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-10 15:17:10,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-10 15:17:10,717 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-10 15:17:10,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:10" (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 [2018-10-10 15:17:10,783 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-10 15:17:10,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-10 15:17:10,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-10 15:17:11,283 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-10 15:17:11,284 INFO L202 PluginConnector]: Adding new model 960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 03:17:11 BoogieIcfgContainer [2018-10-10 15:17:11,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-10 15:17:11,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-10 15:17:11,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-10 15:17:11,289 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-10 15:17:11,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:17:10" (1/2) ... [2018-10-10 15:17:11,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1f1761 and model type 960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 03:17:11, skipping insertion in model container [2018-10-10 15:17:11,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "960521-1_true-valid-memsafety.i_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 03:17:11" (2/2) ... [2018-10-10 15:17:11,293 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1_true-valid-memsafety.i_5.bpl [2018-10-10 15:17:11,303 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-10 15:17:11,312 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-10 15:17:11,330 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-10 15:17:11,360 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-10 15:17:11,360 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-10 15:17:11,361 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-10 15:17:11,361 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-10 15:17:11,361 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-10 15:17:11,361 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-10 15:17:11,361 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-10 15:17:11,362 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-10 15:17:11,362 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-10 15:17:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2018-10-10 15:17:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-10 15:17:11,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:11,392 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:11,393 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:11,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash -412527006, now seen corresponding path program 1 times [2018-10-10 15:17:11,462 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:12,493 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-10 15:17:12,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-10-10 15:17:12,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-10 15:17:12,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-10 15:17:12,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-10-10 15:17:12,522 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 14 states. [2018-10-10 15:17:13,174 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-10 15:17:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:14,072 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-10 15:17:14,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-10 15:17:14,075 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2018-10-10 15:17:14,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:14,088 INFO L225 Difference]: With dead ends: 74 [2018-10-10 15:17:14,088 INFO L226 Difference]: Without dead ends: 74 [2018-10-10 15:17:14,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2018-10-10 15:17:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-10 15:17:14,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2018-10-10 15:17:14,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-10 15:17:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-10 15:17:14,137 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 51 [2018-10-10 15:17:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:14,138 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-10 15:17:14,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-10 15:17:14,139 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-10 15:17:14,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-10 15:17:14,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:14,141 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:14,142 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:14,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:14,142 INFO L82 PathProgramCache]: Analyzing trace with hash 349139816, now seen corresponding path program 1 times [2018-10-10 15:17:14,144 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:14,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:14,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-10 15:17:14,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-10 15:17:14,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-10 15:17:14,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-10-10 15:17:14,813 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2018-10-10 15:17:15,535 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-10-10 15:17:15,929 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-10-10 15:17:16,840 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-10 15:17:17,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:17,012 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-10 15:17:17,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-10 15:17:17,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-10 15:17:17,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:17,018 INFO L225 Difference]: With dead ends: 86 [2018-10-10 15:17:17,018 INFO L226 Difference]: Without dead ends: 86 [2018-10-10 15:17:17,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2018-10-10 15:17:17,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-10 15:17:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-10-10 15:17:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-10 15:17:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-10 15:17:17,029 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 63 [2018-10-10 15:17:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:17,030 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-10 15:17:17,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-10 15:17:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-10 15:17:17,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-10 15:17:17,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:17,033 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:17,033 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:17,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:17,034 INFO L82 PathProgramCache]: Analyzing trace with hash -939247762, now seen corresponding path program 2 times [2018-10-10 15:17:17,035 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:17,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:17,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-10 15:17:17,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-10 15:17:17,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-10 15:17:17,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-10 15:17:17,560 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2018-10-10 15:17:18,583 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-10-10 15:17:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:19,703 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-10 15:17:19,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-10 15:17:19,705 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-10 15:17:19,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:19,707 INFO L225 Difference]: With dead ends: 98 [2018-10-10 15:17:19,707 INFO L226 Difference]: Without dead ends: 98 [2018-10-10 15:17:19,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2018-10-10 15:17:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-10 15:17:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2018-10-10 15:17:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-10 15:17:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-10 15:17:19,717 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 75 [2018-10-10 15:17:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:19,717 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-10 15:17:19,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-10 15:17:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-10 15:17:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-10 15:17:19,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:19,719 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:19,720 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:19,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:19,720 INFO L82 PathProgramCache]: Analyzing trace with hash 893723252, now seen corresponding path program 3 times [2018-10-10 15:17:19,721 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:20,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:20,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-10 15:17:20,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-10 15:17:20,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-10 15:17:20,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-10-10 15:17:20,286 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 22 states. [2018-10-10 15:17:22,186 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-10 15:17:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:23,156 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-10 15:17:23,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-10 15:17:23,156 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2018-10-10 15:17:23,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:23,158 INFO L225 Difference]: With dead ends: 110 [2018-10-10 15:17:23,159 INFO L226 Difference]: Without dead ends: 110 [2018-10-10 15:17:23,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2018-10-10 15:17:23,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-10 15:17:23,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-10-10 15:17:23,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-10 15:17:23,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-10 15:17:23,169 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 87 [2018-10-10 15:17:23,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:23,170 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-10 15:17:23,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-10 15:17:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-10 15:17:23,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-10 15:17:23,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:23,172 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:23,172 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:23,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:23,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1601194886, now seen corresponding path program 4 times [2018-10-10 15:17:23,174 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:23,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:23,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-10 15:17:23,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-10 15:17:23,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-10 15:17:23,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2018-10-10 15:17:23,757 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 24 states. [2018-10-10 15:17:26,523 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-10-10 15:17:26,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:26,649 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-10 15:17:26,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-10 15:17:26,654 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2018-10-10 15:17:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:26,656 INFO L225 Difference]: With dead ends: 122 [2018-10-10 15:17:26,656 INFO L226 Difference]: Without dead ends: 122 [2018-10-10 15:17:26,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2018-10-10 15:17:26,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-10 15:17:26,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2018-10-10 15:17:26,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-10 15:17:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-10 15:17:26,671 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 99 [2018-10-10 15:17:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:26,676 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-10 15:17:26,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-10 15:17:26,676 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-10 15:17:26,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-10 15:17:26,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:26,678 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:26,678 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:26,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:26,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1113494144, now seen corresponding path program 5 times [2018-10-10 15:17:26,682 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:27,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:27,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-10 15:17:27,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-10 15:17:27,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-10 15:17:27,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2018-10-10 15:17:27,395 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 28 states. [2018-10-10 15:17:29,409 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:17:29,923 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:17:31,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:31,114 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-10 15:17:31,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-10 15:17:31,116 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2018-10-10 15:17:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:31,117 INFO L225 Difference]: With dead ends: 134 [2018-10-10 15:17:31,117 INFO L226 Difference]: Without dead ends: 134 [2018-10-10 15:17:31,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1004, Invalid=3156, Unknown=0, NotChecked=0, Total=4160 [2018-10-10 15:17:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-10 15:17:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2018-10-10 15:17:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-10 15:17:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-10 15:17:31,127 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 111 [2018-10-10 15:17:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:31,128 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-10 15:17:31,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-10 15:17:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-10 15:17:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-10 15:17:31,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:31,130 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:31,130 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:31,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:31,131 INFO L82 PathProgramCache]: Analyzing trace with hash 267898246, now seen corresponding path program 6 times [2018-10-10 15:17:31,131 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:31,705 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-10 15:17:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:32,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:32,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-10 15:17:32,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-10 15:17:32,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-10 15:17:32,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2018-10-10 15:17:32,360 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 30 states. [2018-10-10 15:17:34,211 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-10 15:17:34,856 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 15:17:35,006 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:17:35,499 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:17:36,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:36,720 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-10 15:17:36,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-10 15:17:36,721 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2018-10-10 15:17:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:36,724 INFO L225 Difference]: With dead ends: 146 [2018-10-10 15:17:36,724 INFO L226 Difference]: Without dead ends: 146 [2018-10-10 15:17:36,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1064, Invalid=3628, Unknown=0, NotChecked=0, Total=4692 [2018-10-10 15:17:36,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-10 15:17:36,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-10 15:17:36,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-10 15:17:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-10 15:17:36,733 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 123 [2018-10-10 15:17:36,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:36,733 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-10 15:17:36,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-10 15:17:36,734 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-10 15:17:36,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-10 15:17:36,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:36,736 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:36,736 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:36,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:36,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1255167116, now seen corresponding path program 7 times [2018-10-10 15:17:36,737 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:38,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:38,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-10 15:17:38,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-10 15:17:38,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-10 15:17:38,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2018-10-10 15:17:38,633 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 32 states. [2018-10-10 15:17:39,351 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-10 15:17:40,947 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 15:17:41,613 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:17:42,041 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:17:42,338 WARN L178 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:17:44,498 WARN L178 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-10-10 15:17:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:45,150 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-10 15:17:45,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-10 15:17:45,151 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-10 15:17:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:45,153 INFO L225 Difference]: With dead ends: 158 [2018-10-10 15:17:45,153 INFO L226 Difference]: Without dead ends: 158 [2018-10-10 15:17:45,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2018-10-10 15:17:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-10 15:17:45,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2018-10-10 15:17:45,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-10 15:17:45,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-10 15:17:45,161 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 135 [2018-10-10 15:17:45,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:45,161 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-10 15:17:45,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-10 15:17:45,162 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-10 15:17:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-10 15:17:45,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:45,164 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:45,164 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:45,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:45,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1322745198, now seen corresponding path program 8 times [2018-10-10 15:17:45,165 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:46,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:46,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-10 15:17:46,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-10 15:17:46,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-10 15:17:46,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-10-10 15:17:46,434 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 32 states. [2018-10-10 15:17:51,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:51,298 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-10 15:17:51,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-10 15:17:51,298 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2018-10-10 15:17:51,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:51,299 INFO L225 Difference]: With dead ends: 170 [2018-10-10 15:17:51,300 INFO L226 Difference]: Without dead ends: 170 [2018-10-10 15:17:51,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=927, Invalid=4623, Unknown=0, NotChecked=0, Total=5550 [2018-10-10 15:17:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-10 15:17:51,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2018-10-10 15:17:51,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-10 15:17:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-10 15:17:51,307 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 147 [2018-10-10 15:17:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:51,307 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-10 15:17:51,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-10 15:17:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-10 15:17:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-10 15:17:51,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:51,310 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:51,310 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:51,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:51,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1975375768, now seen corresponding path program 9 times [2018-10-10 15:17:51,311 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:52,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:52,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-10 15:17:52,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-10 15:17:52,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-10 15:17:52,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-10 15:17:52,201 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 36 states. [2018-10-10 15:17:56,227 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:17:58,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:17:58,248 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-10 15:17:58,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-10 15:17:58,248 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2018-10-10 15:17:58,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:17:58,250 INFO L225 Difference]: With dead ends: 182 [2018-10-10 15:17:58,250 INFO L226 Difference]: Without dead ends: 182 [2018-10-10 15:17:58,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1890, Invalid=5942, Unknown=0, NotChecked=0, Total=7832 [2018-10-10 15:17:58,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-10 15:17:58,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2018-10-10 15:17:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-10 15:17:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-10 15:17:58,258 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 159 [2018-10-10 15:17:58,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:17:58,258 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-10 15:17:58,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-10 15:17:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-10 15:17:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-10 15:17:58,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:17:58,261 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:17:58,261 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:17:58,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:17:58,262 INFO L82 PathProgramCache]: Analyzing trace with hash 453890974, now seen corresponding path program 10 times [2018-10-10 15:17:58,262 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:17:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:17:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:17:59,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:17:59,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-10 15:17:59,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-10 15:17:59,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-10 15:17:59,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2018-10-10 15:17:59,472 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 38 states. [2018-10-10 15:18:02,008 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:02,432 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:02,595 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:03,143 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:03,535 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:03,796 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:04,814 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:06,221 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-10-10 15:18:06,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-10 15:18:06,224 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 171 [2018-10-10 15:18:06,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:06,225 INFO L225 Difference]: With dead ends: 194 [2018-10-10 15:18:06,225 INFO L226 Difference]: Without dead ends: 194 [2018-10-10 15:18:06,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1966, Invalid=6590, Unknown=0, NotChecked=0, Total=8556 [2018-10-10 15:18:06,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-10 15:18:06,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2018-10-10 15:18:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-10 15:18:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-10 15:18:06,233 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 171 [2018-10-10 15:18:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:06,233 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-10 15:18:06,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-10 15:18:06,234 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-10 15:18:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-10 15:18:06,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:06,236 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:18:06,236 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:06,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:06,236 INFO L82 PathProgramCache]: Analyzing trace with hash -749341020, now seen corresponding path program 11 times [2018-10-10 15:18:06,237 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:18:07,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:07,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-10 15:18:07,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-10 15:18:07,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-10 15:18:07,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2018-10-10 15:18:07,535 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 40 states. [2018-10-10 15:18:13,987 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:18:14,202 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-10-10 15:18:15,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:15,062 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-10-10 15:18:15,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-10 15:18:15,063 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 183 [2018-10-10 15:18:15,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:15,064 INFO L225 Difference]: With dead ends: 206 [2018-10-10 15:18:15,064 INFO L226 Difference]: Without dead ends: 206 [2018-10-10 15:18:15,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2435, Invalid=7665, Unknown=0, NotChecked=0, Total=10100 [2018-10-10 15:18:15,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-10 15:18:15,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2018-10-10 15:18:15,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-10 15:18:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-10 15:18:15,073 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 183 [2018-10-10 15:18:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:15,074 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-10 15:18:15,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-10 15:18:15,074 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-10 15:18:15,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-10 15:18:15,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:15,075 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:18:15,076 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:15,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:15,076 INFO L82 PathProgramCache]: Analyzing trace with hash -527187798, now seen corresponding path program 12 times [2018-10-10 15:18:15,077 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:18:16,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:16,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-10 15:18:16,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-10 15:18:16,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-10 15:18:16,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2018-10-10 15:18:16,226 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 42 states. [2018-10-10 15:18:19,009 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2018-10-10 15:18:19,220 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2018-10-10 15:18:19,450 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 15:18:20,110 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 15:18:20,280 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:18:20,742 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:18:20,913 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:18:21,345 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:18:21,517 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:18:21,978 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:18:22,172 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 15:18:22,630 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 15:18:22,807 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 15:18:23,132 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 15:18:23,300 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-10 15:18:24,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:24,618 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-10-10 15:18:24,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-10 15:18:24,619 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2018-10-10 15:18:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:24,620 INFO L225 Difference]: With dead ends: 218 [2018-10-10 15:18:24,620 INFO L226 Difference]: Without dead ends: 218 [2018-10-10 15:18:24,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2185, Invalid=8321, Unknown=0, NotChecked=0, Total=10506 [2018-10-10 15:18:24,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-10 15:18:24,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2018-10-10 15:18:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-10 15:18:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-10 15:18:24,625 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 195 [2018-10-10 15:18:24,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:24,626 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-10 15:18:24,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-10 15:18:24,626 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-10 15:18:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-10 15:18:24,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:24,627 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:18:24,627 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:24,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:24,628 INFO L82 PathProgramCache]: Analyzing trace with hash -192630352, now seen corresponding path program 13 times [2018-10-10 15:18:24,628 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:18:25,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:25,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-10 15:18:25,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-10 15:18:25,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-10 15:18:25,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2018-10-10 15:18:25,747 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 44 states. [2018-10-10 15:18:27,769 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 15:18:28,310 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:18:28,456 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:18:29,360 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:18:29,552 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:18:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:34,509 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2018-10-10 15:18:34,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-10 15:18:34,509 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 207 [2018-10-10 15:18:34,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:34,510 INFO L225 Difference]: With dead ends: 230 [2018-10-10 15:18:34,510 INFO L226 Difference]: Without dead ends: 230 [2018-10-10 15:18:34,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3048, Invalid=9608, Unknown=0, NotChecked=0, Total=12656 [2018-10-10 15:18:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-10 15:18:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-10-10 15:18:34,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-10 15:18:34,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-10 15:18:34,516 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 207 [2018-10-10 15:18:34,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:34,516 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-10 15:18:34,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-10 15:18:34,517 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-10 15:18:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-10 15:18:34,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:34,518 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:18:34,518 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:34,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:34,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1868150346, now seen corresponding path program 14 times [2018-10-10 15:18:34,519 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:18:35,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:35,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-10 15:18:35,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-10 15:18:35,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-10 15:18:35,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2018-10-10 15:18:35,902 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 46 states. [2018-10-10 15:18:38,639 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:39,079 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:39,222 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:39,690 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:39,892 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:40,299 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:41,423 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:41,594 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:18:43,883 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:18:44,535 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 15:18:44,782 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2018-10-10 15:18:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:45,609 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2018-10-10 15:18:45,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-10 15:18:45,609 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 219 [2018-10-10 15:18:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:45,612 INFO L225 Difference]: With dead ends: 242 [2018-10-10 15:18:45,612 INFO L226 Difference]: Without dead ends: 242 [2018-10-10 15:18:45,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3140, Invalid=10432, Unknown=0, NotChecked=0, Total=13572 [2018-10-10 15:18:45,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-10 15:18:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2018-10-10 15:18:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-10 15:18:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-10 15:18:45,618 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 219 [2018-10-10 15:18:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:45,619 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-10 15:18:45,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-10 15:18:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-10 15:18:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-10 15:18:45,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:45,620 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:18:45,620 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:45,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:45,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1714817212, now seen corresponding path program 15 times [2018-10-10 15:18:45,621 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:18:46,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:46,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-10 15:18:46,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-10 15:18:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-10 15:18:46,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2018-10-10 15:18:46,890 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 48 states. [2018-10-10 15:18:49,677 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:18:49,873 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:18:54,973 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:18:56,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:18:56,799 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2018-10-10 15:18:56,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-10 15:18:56,799 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2018-10-10 15:18:56,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:18:56,801 INFO L225 Difference]: With dead ends: 254 [2018-10-10 15:18:56,801 INFO L226 Difference]: Without dead ends: 254 [2018-10-10 15:18:56,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=3729, Invalid=11771, Unknown=0, NotChecked=0, Total=15500 [2018-10-10 15:18:56,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-10 15:18:56,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2018-10-10 15:18:56,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-10 15:18:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-10 15:18:56,808 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 231 [2018-10-10 15:18:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:18:56,809 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-10 15:18:56,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-10 15:18:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-10 15:18:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-10 15:18:56,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:18:56,810 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:18:56,810 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:18:56,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:18:56,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1238274366, now seen corresponding path program 16 times [2018-10-10 15:18:56,812 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:18:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:18:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:18:58,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:18:58,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-10 15:18:58,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-10 15:18:58,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-10 15:18:58,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2018-10-10 15:18:58,492 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 48 states. [2018-10-10 15:19:09,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:19:09,130 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2018-10-10 15:19:09,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-10 15:19:09,130 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 243 [2018-10-10 15:19:09,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:19:09,132 INFO L225 Difference]: With dead ends: 266 [2018-10-10 15:19:09,132 INFO L226 Difference]: Without dead ends: 266 [2018-10-10 15:19:09,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1535, Invalid=11575, Unknown=0, NotChecked=0, Total=13110 [2018-10-10 15:19:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-10 15:19:09,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2018-10-10 15:19:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-10 15:19:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-10 15:19:09,138 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 243 [2018-10-10 15:19:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:19:09,138 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-10 15:19:09,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-10 15:19:09,139 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-10 15:19:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-10 15:19:09,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:19:09,140 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:19:09,140 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:19:09,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:19:09,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1319765048, now seen corresponding path program 17 times [2018-10-10 15:19:09,141 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:19:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:19:10,374 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-10 15:19:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:19:11,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:19:11,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-10 15:19:11,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-10 15:19:11,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-10 15:19:11,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2018-10-10 15:19:11,635 INFO L87 Difference]: Start difference. First operand 256 states and 256 transitions. Second operand 52 states. [2018-10-10 15:19:15,684 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:19:24,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:19:24,636 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-10-10 15:19:24,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-10 15:19:24,637 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 255 [2018-10-10 15:19:24,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:19:24,640 INFO L225 Difference]: With dead ends: 278 [2018-10-10 15:19:24,640 INFO L226 Difference]: Without dead ends: 278 [2018-10-10 15:19:24,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=4478, Invalid=14154, Unknown=0, NotChecked=0, Total=18632 [2018-10-10 15:19:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-10 15:19:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2018-10-10 15:19:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-10 15:19:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-10-10 15:19:24,646 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 255 [2018-10-10 15:19:24,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:19:24,646 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-10-10 15:19:24,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-10 15:19:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-10-10 15:19:24,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-10 15:19:24,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:19:24,648 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:19:24,649 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:19:24,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:19:24,649 INFO L82 PathProgramCache]: Analyzing trace with hash -668913714, now seen corresponding path program 18 times [2018-10-10 15:19:24,650 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:19:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:19:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:19:26,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:19:26,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-10 15:19:26,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-10 15:19:26,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-10 15:19:26,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2018-10-10 15:19:26,497 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 54 states. [2018-10-10 15:19:29,952 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:30,099 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:30,515 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:30,683 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:31,185 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:31,338 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:31,764 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:31,931 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:32,374 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:32,545 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:32,988 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:33,604 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:34,276 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:34,460 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:34,936 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:35,120 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:35,601 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:35,828 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:36,065 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 15:19:36,462 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:36,658 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:37,164 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:37,370 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:19:37,892 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:19:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:19:39,780 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2018-10-10 15:19:39,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-10 15:19:39,780 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2018-10-10 15:19:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:19:39,782 INFO L225 Difference]: With dead ends: 290 [2018-10-10 15:19:39,782 INFO L226 Difference]: Without dead ends: 290 [2018-10-10 15:19:39,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=4586, Invalid=15154, Unknown=0, NotChecked=0, Total=19740 [2018-10-10 15:19:39,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-10 15:19:39,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2018-10-10 15:19:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-10 15:19:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 280 transitions. [2018-10-10 15:19:39,788 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 280 transitions. Word has length 267 [2018-10-10 15:19:39,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:19:39,788 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 280 transitions. [2018-10-10 15:19:39,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-10 15:19:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 280 transitions. [2018-10-10 15:19:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-10 15:19:39,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:19:39,790 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:19:39,791 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:19:39,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:19:39,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1523616468, now seen corresponding path program 19 times [2018-10-10 15:19:39,792 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:19:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:19:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:19:41,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:19:41,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-10 15:19:41,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-10 15:19:41,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-10 15:19:41,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2597, Unknown=0, NotChecked=0, Total=3080 [2018-10-10 15:19:41,827 INFO L87 Difference]: Start difference. First operand 280 states and 280 transitions. Second operand 56 states. [2018-10-10 15:19:44,282 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 15:19:46,056 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:19:48,142 WARN L178 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 15:19:51,421 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:19:56,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:19:56,399 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2018-10-10 15:19:56,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-10 15:19:56,399 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 279 [2018-10-10 15:19:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:19:56,400 INFO L225 Difference]: With dead ends: 302 [2018-10-10 15:19:56,401 INFO L226 Difference]: Without dead ends: 302 [2018-10-10 15:19:56,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=5295, Invalid=16757, Unknown=0, NotChecked=0, Total=22052 [2018-10-10 15:19:56,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-10-10 15:19:56,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 292. [2018-10-10 15:19:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-10 15:19:56,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2018-10-10 15:19:56,406 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 279 [2018-10-10 15:19:56,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:19:56,407 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2018-10-10 15:19:56,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-10 15:19:56,407 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2018-10-10 15:19:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-10 15:19:56,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:19:56,409 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:19:56,409 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:19:56,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:19:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash 2036436186, now seen corresponding path program 20 times [2018-10-10 15:19:56,410 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:19:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:19:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:19:59,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:19:59,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-10 15:19:59,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-10 15:19:59,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-10 15:19:59,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2018-10-10 15:19:59,336 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 58 states. [2018-10-10 15:20:03,261 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 15:20:03,975 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 15:20:04,145 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:04,660 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:04,839 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:05,322 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:05,505 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:05,993 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:06,182 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:06,512 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-10 15:20:06,753 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:06,978 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:07,530 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:07,739 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:08,269 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:08,474 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:08,991 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:09,203 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:09,734 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:09,963 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:10,515 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:10,741 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:11,332 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:11,579 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:20:11,834 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-10 15:20:12,284 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:20:12,520 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 15:20:13,094 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 15:20:13,313 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 15:20:13,720 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 15:20:13,937 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-10 15:20:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:20:15,492 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2018-10-10 15:20:15,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-10 15:20:15,492 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 291 [2018-10-10 15:20:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:20:15,494 INFO L225 Difference]: With dead ends: 314 [2018-10-10 15:20:15,494 INFO L226 Difference]: Without dead ends: 314 [2018-10-10 15:20:15,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=4885, Invalid=17765, Unknown=0, NotChecked=0, Total=22650 [2018-10-10 15:20:15,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-10 15:20:15,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2018-10-10 15:20:15,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-10 15:20:15,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 304 transitions. [2018-10-10 15:20:15,501 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 304 transitions. Word has length 291 [2018-10-10 15:20:15,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:20:15,501 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 304 transitions. [2018-10-10 15:20:15,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-10 15:20:15,501 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 304 transitions. [2018-10-10 15:20:15,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-10 15:20:15,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:20:15,503 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:20:15,503 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:20:15,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:20:15,504 INFO L82 PathProgramCache]: Analyzing trace with hash -476989984, now seen corresponding path program 21 times [2018-10-10 15:20:15,504 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:20:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:20:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:20:18,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:20:18,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-10 15:20:18,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-10 15:20:18,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-10 15:20:18,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2018-10-10 15:20:18,078 INFO L87 Difference]: Start difference. First operand 304 states and 304 transitions. Second operand 60 states. [2018-10-10 15:20:22,275 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:20:27,117 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:20:32,308 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2018-10-10 15:20:32,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:20:32,947 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2018-10-10 15:20:32,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-10 15:20:32,949 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 303 [2018-10-10 15:20:32,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:20:32,951 INFO L225 Difference]: With dead ends: 326 [2018-10-10 15:20:32,951 INFO L226 Difference]: Without dead ends: 326 [2018-10-10 15:20:32,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=6180, Invalid=19580, Unknown=0, NotChecked=0, Total=25760 [2018-10-10 15:20:32,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-10-10 15:20:32,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2018-10-10 15:20:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-10 15:20:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 316 transitions. [2018-10-10 15:20:32,956 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 316 transitions. Word has length 303 [2018-10-10 15:20:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:20:32,956 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 316 transitions. [2018-10-10 15:20:32,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-10 15:20:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 316 transitions. [2018-10-10 15:20:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-10 15:20:32,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:20:32,958 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:20:32,959 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:20:32,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:20:32,959 INFO L82 PathProgramCache]: Analyzing trace with hash 417236454, now seen corresponding path program 22 times [2018-10-10 15:20:32,960 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:20:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:20:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:20:35,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:20:35,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-10 15:20:35,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-10 15:20:35,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-10 15:20:35,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2018-10-10 15:20:35,201 INFO L87 Difference]: Start difference. First operand 316 states and 316 transitions. Second operand 62 states. [2018-10-10 15:20:37,458 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-10-10 15:20:38,643 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:39,207 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:39,784 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:39,945 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:40,378 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:40,536 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:40,988 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:41,166 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:41,637 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:41,813 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:42,296 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:42,519 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:43,048 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:43,239 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:43,739 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:43,926 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:44,418 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:45,117 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:45,828 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:46,032 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:46,556 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:46,768 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:47,570 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:47,813 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 15:20:48,405 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:48,965 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:49,196 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:20:49,775 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:20:51,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:20:51,820 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-10-10 15:20:51,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-10 15:20:51,821 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 315 [2018-10-10 15:20:51,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:20:51,822 INFO L225 Difference]: With dead ends: 338 [2018-10-10 15:20:51,822 INFO L226 Difference]: Without dead ends: 338 [2018-10-10 15:20:51,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=6304, Invalid=20756, Unknown=0, NotChecked=0, Total=27060 [2018-10-10 15:20:51,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-10 15:20:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-10-10 15:20:51,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-10 15:20:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-10-10 15:20:51,841 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 315 [2018-10-10 15:20:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:20:51,841 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-10-10 15:20:51,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-10 15:20:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-10-10 15:20:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-10 15:20:51,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:20:51,844 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:20:51,844 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:20:51,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:20:51,844 INFO L82 PathProgramCache]: Analyzing trace with hash -930775828, now seen corresponding path program 23 times [2018-10-10 15:20:51,845 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:20:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:20:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:20:54,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:20:54,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-10 15:20:54,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-10 15:20:54,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-10 15:20:54,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=3365, Unknown=0, NotChecked=0, Total=4032 [2018-10-10 15:20:54,722 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 64 states. [2018-10-10 15:20:57,437 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2018-10-10 15:20:57,573 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:20:57,742 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 15:21:02,845 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:21:12,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:21:12,350 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2018-10-10 15:21:12,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-10 15:21:12,352 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 327 [2018-10-10 15:21:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:21:12,354 INFO L225 Difference]: With dead ends: 350 [2018-10-10 15:21:12,354 INFO L226 Difference]: Without dead ends: 350 [2018-10-10 15:21:12,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7091 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=7133, Invalid=22623, Unknown=0, NotChecked=0, Total=29756 [2018-10-10 15:21:12,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-10-10 15:21:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2018-10-10 15:21:12,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-10 15:21:12,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 340 transitions. [2018-10-10 15:21:12,360 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 340 transitions. Word has length 327 [2018-10-10 15:21:12,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:21:12,360 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 340 transitions. [2018-10-10 15:21:12,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-10 15:21:12,360 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 340 transitions. [2018-10-10 15:21:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-10 15:21:12,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:21:12,362 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:21:12,363 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:21:12,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:21:12,363 INFO L82 PathProgramCache]: Analyzing trace with hash 830741234, now seen corresponding path program 24 times [2018-10-10 15:21:12,364 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:21:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:21:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:21:15,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:21:15,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-10 15:21:15,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-10 15:21:15,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-10 15:21:15,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2018-10-10 15:21:15,133 INFO L87 Difference]: Start difference. First operand 340 states and 340 transitions. Second operand 66 states. [2018-10-10 15:21:18,166 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2018-10-10 15:21:18,811 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 15:21:19,528 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-10-10 15:21:19,701 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-10-10 15:21:20,291 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2018-10-10 15:21:20,475 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2018-10-10 15:21:21,089 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2018-10-10 15:21:21,290 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2018-10-10 15:21:21,929 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2018-10-10 15:21:22,144 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2018-10-10 15:21:22,499 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2018-10-10 15:21:22,826 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2018-10-10 15:21:23,077 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:23,268 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:23,534 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:23,807 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:24,058 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:24,241 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:24,427 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:24,679 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:24,944 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:25,132 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:25,325 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:25,593 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:25,864 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:26,070 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:26,275 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:26,551 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:26,834 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:27,036 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:27,239 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:27,510 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:27,781 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:27,980 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:28,188 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:28,484 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:28,822 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-10-10 15:21:29,033 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2018-10-10 15:21:29,234 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-10-10 15:21:29,519 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2018-10-10 15:21:29,817 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2018-10-10 15:21:30,039 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-10-10 15:21:30,244 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-10-10 15:21:30,529 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2018-10-10 15:21:30,816 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2018-10-10 15:21:31,034 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2018-10-10 15:21:31,338 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2018-10-10 15:21:31,618 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2018-10-10 15:21:32,110 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2018-10-10 15:21:32,378 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2018-10-10 15:21:32,855 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-10-10 15:21:33,108 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2018-10-10 15:21:33,586 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2018-10-10 15:21:33,912 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2018-10-10 15:21:34,359 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2018-10-10 15:21:34,648 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2018-10-10 15:21:36,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:21:36,260 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2018-10-10 15:21:36,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-10 15:21:36,260 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 339 [2018-10-10 15:21:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:21:36,262 INFO L225 Difference]: With dead ends: 362 [2018-10-10 15:21:36,262 INFO L226 Difference]: Without dead ends: 362 [2018-10-10 15:21:36,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=5471, Invalid=23599, Unknown=0, NotChecked=0, Total=29070 [2018-10-10 15:21:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-10 15:21:36,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2018-10-10 15:21:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-10 15:21:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2018-10-10 15:21:36,268 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 339 [2018-10-10 15:21:36,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:21:36,268 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2018-10-10 15:21:36,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-10 15:21:36,268 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2018-10-10 15:21:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-10 15:21:36,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:21:36,271 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:21:36,271 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:21:36,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:21:36,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2103975944, now seen corresponding path program 25 times [2018-10-10 15:21:36,272 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:21:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:21:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:21:38,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:21:38,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-10 15:21:38,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-10 15:21:38,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-10 15:21:38,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2018-10-10 15:21:38,662 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 68 states. [2018-10-10 15:21:42,196 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:21:43,819 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:21:44,021 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:21:45,116 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:21:49,088 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:21:54,093 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 15:21:58,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:21:58,510 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2018-10-10 15:21:58,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-10 15:21:58,510 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 351 [2018-10-10 15:21:58,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:21:58,512 INFO L225 Difference]: With dead ends: 374 [2018-10-10 15:21:58,512 INFO L226 Difference]: Without dead ends: 374 [2018-10-10 15:21:58,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8218 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=8154, Invalid=25886, Unknown=0, NotChecked=0, Total=34040 [2018-10-10 15:21:58,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-10-10 15:21:58,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2018-10-10 15:21:58,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-10 15:21:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 364 transitions. [2018-10-10 15:21:58,518 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 364 transitions. Word has length 351 [2018-10-10 15:21:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:21:58,519 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 364 transitions. [2018-10-10 15:21:58,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-10 15:21:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 364 transitions. [2018-10-10 15:21:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-10 15:21:58,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:21:58,521 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:21:58,521 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:21:58,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:21:58,522 INFO L82 PathProgramCache]: Analyzing trace with hash 977161214, now seen corresponding path program 26 times [2018-10-10 15:21:58,522 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:21:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:22:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:22:01,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:22:01,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-10 15:22:01,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-10 15:22:01,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-10 15:22:01,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2018-10-10 15:22:01,368 INFO L87 Difference]: Start difference. First operand 364 states and 364 transitions. Second operand 70 states. [2018-10-10 15:22:03,768 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:04,224 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:04,412 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:04,878 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:05,453 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:05,612 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:06,062 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:06,225 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:06,691 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:06,867 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:07,340 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:07,514 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:07,995 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:08,173 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:08,667 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:08,856 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:09,379 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:09,639 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:10,161 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:10,360 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:10,877 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:11,083 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:11,598 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:12,336 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:12,563 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:13,876 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:14,785 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:15,616 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:16,438 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:17,284 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:18,136 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:18,407 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:22:19,034 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:22:19,966 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 15:22:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:22:21,315 INFO L93 Difference]: Finished difference Result 386 states and 386 transitions. [2018-10-10 15:22:21,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-10 15:22:21,315 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 363 [2018-10-10 15:22:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:22:21,317 INFO L225 Difference]: With dead ends: 386 [2018-10-10 15:22:21,317 INFO L226 Difference]: Without dead ends: 386 [2018-10-10 15:22:21,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8540 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=8294, Invalid=27238, Unknown=0, NotChecked=0, Total=35532 [2018-10-10 15:22:21,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-10 15:22:21,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2018-10-10 15:22:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-10 15:22:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2018-10-10 15:22:21,323 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 363 [2018-10-10 15:22:21,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:22:21,324 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2018-10-10 15:22:21,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-10 15:22:21,324 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2018-10-10 15:22:21,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-10 15:22:21,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:22:21,326 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:22:21,326 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:22:21,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:22:21,327 INFO L82 PathProgramCache]: Analyzing trace with hash -2034966780, now seen corresponding path program 27 times [2018-10-10 15:22:21,327 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:22:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:22:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:22:24,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:22:24,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-10 15:22:24,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-10 15:22:24,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-10 15:22:24,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-10-10 15:22:24,022 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand 72 states. [2018-10-10 15:22:29,873 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 15:22:30,065 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:22:36,766 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:22:40,363 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 15:22:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:22:45,890 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-10-10 15:22:45,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-10 15:22:45,890 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 375 [2018-10-10 15:22:45,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:22:45,892 INFO L225 Difference]: With dead ends: 398 [2018-10-10 15:22:45,892 INFO L226 Difference]: Without dead ends: 398 [2018-10-10 15:22:45,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=9243, Invalid=29369, Unknown=0, NotChecked=0, Total=38612 [2018-10-10 15:22:45,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-10 15:22:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 388. [2018-10-10 15:22:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-10 15:22:45,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-10-10 15:22:45,898 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 375 [2018-10-10 15:22:45,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:22:45,899 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-10-10 15:22:45,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-10 15:22:45,899 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-10-10 15:22:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-10 15:22:45,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:22:45,902 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:22:45,902 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:22:45,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:22:45,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1510401782, now seen corresponding path program 28 times [2018-10-10 15:22:45,903 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:22:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:22:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:22:48,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:22:48,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-10 15:22:48,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-10 15:22:48,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-10 15:22:48,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=4619, Unknown=0, NotChecked=0, Total=5402 [2018-10-10 15:22:48,701 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 74 states. [2018-10-10 15:22:52,059 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2018-10-10 15:22:52,211 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-10-10 15:22:52,733 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2018-10-10 15:22:52,924 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:53,437 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:53,615 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:54,100 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:54,284 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:54,788 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:54,971 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:55,500 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:55,734 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:56,279 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:56,474 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:57,004 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:57,216 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:57,768 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:57,978 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:58,526 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:58,745 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:22:59,313 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:22:59,532 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:00,105 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:00,345 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:00,813 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2018-10-10 15:23:01,065 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:01,303 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:01,897 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:02,139 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:02,753 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:03,019 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:03,650 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:03,909 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:04,549 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:04,809 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:05,470 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:05,764 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:06,065 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-10-10 15:23:06,504 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:06,781 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:07,452 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:07,735 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2018-10-10 15:23:08,429 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-10-10 15:23:08,711 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2018-10-10 15:23:09,429 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-10-10 15:23:09,715 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-10 15:23:10,228 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-10-10 15:23:10,508 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-10-10 15:23:11,116 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2018-10-10 15:23:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:23:12,549 INFO L93 Difference]: Finished difference Result 410 states and 410 transitions. [2018-10-10 15:23:12,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-10 15:23:12,549 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 387 [2018-10-10 15:23:12,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:23:12,551 INFO L225 Difference]: With dead ends: 410 [2018-10-10 15:23:12,551 INFO L226 Difference]: Without dead ends: 410 [2018-10-10 15:23:12,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9425 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=8673, Invalid=30729, Unknown=0, NotChecked=0, Total=39402 [2018-10-10 15:23:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-10-10 15:23:12,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 400. [2018-10-10 15:23:12,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-10 15:23:12,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 400 transitions. [2018-10-10 15:23:12,558 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 400 transitions. Word has length 387 [2018-10-10 15:23:12,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:23:12,558 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 400 transitions. [2018-10-10 15:23:12,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-10 15:23:12,559 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 400 transitions. [2018-10-10 15:23:12,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-10 15:23:12,561 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:23:12,561 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:23:12,561 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:23:12,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:23:12,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1170766352, now seen corresponding path program 29 times [2018-10-10 15:23:12,562 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:23:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:23:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:23:15,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:23:15,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-10 15:23:15,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-10 15:23:15,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-10 15:23:15,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4697, Unknown=0, NotChecked=0, Total=5700 [2018-10-10 15:23:15,548 INFO L87 Difference]: Start difference. First operand 400 states and 400 transitions. Second operand 76 states. [2018-10-10 15:23:20,180 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:23:21,169 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:23:22,969 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:23:26,196 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:23:26,453 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:23:28,457 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:23:36,459 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 15:23:39,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:23:39,658 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-10 15:23:39,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-10 15:23:39,659 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 399 [2018-10-10 15:23:39,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:23:39,661 INFO L225 Difference]: With dead ends: 422 [2018-10-10 15:23:39,661 INFO L226 Difference]: Without dead ends: 422 [2018-10-10 15:23:39,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10724 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=10400, Invalid=33072, Unknown=0, NotChecked=0, Total=43472 [2018-10-10 15:23:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-10 15:23:39,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2018-10-10 15:23:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-10 15:23:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 412 transitions. [2018-10-10 15:23:39,667 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 412 transitions. Word has length 399 [2018-10-10 15:23:39,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:23:39,668 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 412 transitions. [2018-10-10 15:23:39,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-10 15:23:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 412 transitions. [2018-10-10 15:23:39,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-10 15:23:39,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:23:39,671 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:23:39,671 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:23:39,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:23:39,671 INFO L82 PathProgramCache]: Analyzing trace with hash -476020202, now seen corresponding path program 30 times [2018-10-10 15:23:39,672 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:23:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:23:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:23:43,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:23:43,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-10 15:23:43,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-10 15:23:43,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-10 15:23:43,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2018-10-10 15:23:43,062 INFO L87 Difference]: Start difference. First operand 412 states and 412 transitions. Second operand 78 states. [2018-10-10 15:23:45,876 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-10-10 15:23:46,491 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:46,643 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:47,202 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:47,787 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:49,005 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:49,632 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:50,281 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:50,948 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:51,637 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:51,864 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:52,090 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-10-10 15:23:52,476 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:52,669 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:53,185 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:53,920 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:54,682 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:56,220 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:57,068 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:57,382 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:57,975 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:58,804 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:23:59,043 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:23:59,654 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:24:00,549 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:24:00,811 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:24:01,469 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:24:01,727 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:24:02,294 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-10-10 15:24:02,575 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:24:03,542 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:24:03,819 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:24:04,520 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:24:04,805 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2018-10-10 15:24:05,493 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-10-10 15:24:06,489 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2018-10-10 15:24:07,323 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2018-10-10 15:24:08,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:24:08,132 INFO L93 Difference]: Finished difference Result 434 states and 434 transitions. [2018-10-10 15:24:08,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-10 15:24:08,132 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 411 [2018-10-10 15:24:08,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:24:08,134 INFO L225 Difference]: With dead ends: 434 [2018-10-10 15:24:08,134 INFO L226 Difference]: Without dead ends: 434 [2018-10-10 15:24:08,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11090 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=10556, Invalid=34600, Unknown=0, NotChecked=0, Total=45156 [2018-10-10 15:24:08,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-10 15:24:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2018-10-10 15:24:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-10 15:24:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-10 15:24:08,140 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 411 [2018-10-10 15:24:08,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:24:08,141 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-10 15:24:08,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-10 15:24:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-10 15:24:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-10 15:24:08,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:24:08,144 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:24:08,144 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:24:08,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:24:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash 750694684, now seen corresponding path program 31 times [2018-10-10 15:24:08,145 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:24:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:24:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:24:12,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:24:12,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-10 15:24:12,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-10 15:24:12,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-10 15:24:12,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=5189, Unknown=0, NotChecked=0, Total=6320 [2018-10-10 15:24:12,178 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 80 states. [2018-10-10 15:24:17,447 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:24:17,626 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-10 15:24:22,466 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:24:22,724 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:24:23,517 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:24:26,336 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:24:27,810 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 15:24:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:24:38,702 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2018-10-10 15:24:38,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-10 15:24:38,703 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 423 [2018-10-10 15:24:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:24:38,704 INFO L225 Difference]: With dead ends: 446 [2018-10-10 15:24:38,704 INFO L226 Difference]: Without dead ends: 446 [2018-10-10 15:24:38,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12103 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=11625, Invalid=36995, Unknown=0, NotChecked=0, Total=48620 [2018-10-10 15:24:38,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2018-10-10 15:24:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2018-10-10 15:24:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-10 15:24:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 436 transitions. [2018-10-10 15:24:38,711 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 436 transitions. Word has length 423 [2018-10-10 15:24:38,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:24:38,712 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 436 transitions. [2018-10-10 15:24:38,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-10 15:24:38,712 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 436 transitions. [2018-10-10 15:24:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-10 15:24:38,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:24:38,715 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:24:38,715 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:24:38,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:24:38,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1579190050, now seen corresponding path program 32 times [2018-10-10 15:24:38,716 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:24:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:24:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:24:43,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:24:43,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-10 15:24:43,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-10 15:24:43,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-10 15:24:43,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6090, Unknown=0, NotChecked=0, Total=6320 [2018-10-10 15:24:43,365 INFO L87 Difference]: Start difference. First operand 436 states and 436 transitions. Second operand 80 states. [2018-10-10 15:25:15,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:25:15,071 INFO L93 Difference]: Finished difference Result 458 states and 458 transitions. [2018-10-10 15:25:15,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-10-10 15:25:15,072 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 435 [2018-10-10 15:25:15,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:25:15,073 INFO L225 Difference]: With dead ends: 458 [2018-10-10 15:25:15,073 INFO L226 Difference]: Without dead ends: 458 [2018-10-10 15:25:15,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6811 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=2751, Invalid=35079, Unknown=0, NotChecked=0, Total=37830 [2018-10-10 15:25:15,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-10-10 15:25:15,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 448. [2018-10-10 15:25:15,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-10-10 15:25:15,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 448 transitions. [2018-10-10 15:25:15,080 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 448 transitions. Word has length 435 [2018-10-10 15:25:15,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:25:15,080 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 448 transitions. [2018-10-10 15:25:15,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-10 15:25:15,080 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 448 transitions. [2018-10-10 15:25:15,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-10-10 15:25:15,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:25:15,083 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:25:15,083 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:25:15,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:25:15,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1534884824, now seen corresponding path program 33 times [2018-10-10 15:25:15,084 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:25:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:25:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:25:18,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:25:18,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-10-10 15:25:18,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-10 15:25:18,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-10 15:25:18,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1267, Invalid=5705, Unknown=0, NotChecked=0, Total=6972 [2018-10-10 15:25:18,599 INFO L87 Difference]: Start difference. First operand 448 states and 448 transitions. Second operand 84 states. [2018-10-10 15:25:26,262 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:25:29,046 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-10-10 15:25:34,381 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:25:37,918 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:25:39,560 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-10 15:25:40,775 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:25:44,711 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-10 15:25:47,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:25:47,500 INFO L93 Difference]: Finished difference Result 470 states and 470 transitions. [2018-10-10 15:25:47,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-10-10 15:25:47,500 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 447 [2018-10-10 15:25:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:25:47,502 INFO L225 Difference]: With dead ends: 470 [2018-10-10 15:25:47,502 INFO L226 Difference]: Without dead ends: 470 [2018-10-10 15:25:47,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13566 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=12918, Invalid=41138, Unknown=0, NotChecked=0, Total=54056 [2018-10-10 15:25:47,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-10-10 15:25:47,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 460. [2018-10-10 15:25:47,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-10-10 15:25:47,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 460 transitions. [2018-10-10 15:25:47,508 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 460 transitions. Word has length 447 [2018-10-10 15:25:47,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:25:47,509 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 460 transitions. [2018-10-10 15:25:47,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-10 15:25:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 460 transitions. [2018-10-10 15:25:47,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-10-10 15:25:47,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:25:47,512 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:25:47,512 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:25:47,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:25:47,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2087004206, now seen corresponding path program 34 times [2018-10-10 15:25:47,513 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:25:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat